Add Quaternions: quaternion128, quaternion256

code/demo.odin

@@ -4,8 +4,8 @@
 
 
 main :: proc() {
-	x := 1+2i;
-	y := 3-4i;
-	x = x*y;
-	fmt.printf("%v\n", x);
+	x := 1+2i+3j+4k;
+	y := 3-4i-5j-6k;
+	z := x/y;
+	fmt.println(z, abs(z));
 }

core/_preload.odin

@@ -2,9 +2,7 @@
 
 #import "os.odin";
 #import "fmt.odin";
-#import "mem.odin";
 #import "utf8.odin";
-#import "hash.odin";
 
 // IMPORTANT NOTE(bill): `type_info` & `type_info_val` cannot be used within a
 // #shared_global_scope due to  the internals of the compiler.
@@ -42,6 +40,7 @@ Type_Info :: union {
 	Integer{size: int, signed: bool},
 	Float{size: int},
 	Complex{size: int},
+	Quaternion{size: int},
 	String{},
 	Boolean{},
 	Any{},
@@ -130,8 +129,6 @@ __trap             :: proc()        #foreign __llvm_core "llvm.trap";
 read_cycle_counter :: proc() -> u64 #foreign __llvm_core "llvm.readcyclecounter";
 
 
-
-
 // IMPORTANT NOTE(bill): Must be in this order (as the compiler relies upon it)
 Allocator_Mode :: enum u8 {
 	ALLOC,
@@ -231,7 +228,7 @@ default_resize_align :: proc(old_memory: rawptr, old_size, new_size, alignment:
 		return nil;
 	}
 
-	mem.copy(new_memory, old_memory, min(old_size, new_size));;
+	__mem_copy(new_memory, old_memory, min(old_size, new_size));;
 	free(old_memory);
 	return new_memory;
 }
@@ -290,7 +287,7 @@ __string_eq :: proc(a, b: string) -> bool {
 }
 
 __string_cmp :: proc(a, b: string) -> int {
-	return mem.compare(cast([]byte)a, cast([]byte)b);
+	return __mem_compare(a.data, b.data, min(a.count, b.count));
 }
 
 __string_ne :: proc(a, b: string) -> bool #inline { return !__string_eq(a, b); }
@@ -300,6 +297,26 @@ __string_le :: proc(a, b: string) -> bool #inline { return __string_cmp(a, b) <=
 __string_ge :: proc(a, b: string) -> bool #inline { return __string_cmp(a, b) >= 0; }
 
 
+__complex64_eq  :: proc(a, b: complex64)  -> bool #inline { return real(a) == real(b) && imag(a) == imag(b); }
+__complex64_ne  :: proc(a, b: complex64)  -> bool #inline { return real(a) != real(b) || imag(a) != imag(b); }
+
+__complex128_eq :: proc(a, b: complex128) -> bool #inline { return real(a) == real(b) && imag(a) == imag(b); }
+__complex128_ne :: proc(a, b: complex128) -> bool #inline { return real(a) != real(b) || imag(a) != imag(b); }
+
+
+__quaternion128_eq :: proc(a, b: quaternion128) -> bool #inline {
+	return real(a) == real(b) && imag(a) == imag(b) && jmag(a) == jmag(b) && kmag(a) == kmag(b);
+}
+__quaternion128_ne :: proc(a, b: quaternion128) -> bool #inline {
+	return real(a) != real(b) || imag(a) != imag(b) || jmag(a) != jmag(b) || kmag(a) != kmag(b);
+}
+__quaternion256_eq :: proc(a, b: quaternion256) -> bool #inline {
+	return real(a) == real(b) && imag(a) == imag(b) && jmag(a) == jmag(b) && kmag(a) == kmag(b);
+}
+__quaternion256_ne :: proc(a, b: quaternion256) -> bool #inline {
+	return real(a) != real(b) || imag(a) != imag(b) || jmag(a) != jmag(b) || kmag(a) != kmag(b);
+}
+
 __assert :: proc(file: string, line, column: int, msg: string) #inline {
 	fmt.fprintf(os.stderr, "%s(%d:%d) Runtime assertion: %s\n",
 	            file, line, column, msg);
@@ -381,6 +398,26 @@ __mem_compare :: proc(a, b: ^byte, n: int) -> int {
 	return 0;
 }
 
+__sqrt_f32 :: proc(x: f32) -> f32 #foreign __llvm_core "llvm.sqrt.f32";
+__sqrt_f64 :: proc(x: f64) -> f64 #foreign __llvm_core "llvm.sqrt.f64";
+__abs_complex64 :: proc(x: complex64) -> f32 #inline {
+	r, i := real(x), imag(x);
+	return __sqrt_f32(r*r + i*i);
+}
+__abs_complex128 :: proc(x: complex128) -> f64 #inline {
+	r, i := real(x), imag(x);
+	return __sqrt_f64(r*r + i*i);
+}
+__abs_quaternion128 :: proc(x: quaternion128) -> f32 #inline {
+	r, i, j, k := real(x), imag(x), jmag(x), kmag(x);
+	return __sqrt_f32(r*r + i*i + j*j + k*k);
+}
+__abs_quaternion256 :: proc(x: quaternion256) -> f64 #inline {
+	r, i, j, k := real(x), imag(x), jmag(x), kmag(x);
+	return __sqrt_f64(r*r + i*i + j*j + k*k);
+}
+
+
 
 Raw_Any :: struct #ordered {
 	type_info: ^Type_Info,
@@ -460,7 +497,7 @@ __dynamic_array_append :: proc(array_: rawptr, elem_size, elem_align: int,
 	}
 	data := cast(^byte)array.data;
 	assert(data != nil);
-	mem.copy(data + (elem_size*array.count), items, elem_size * item_count);
+	__mem_copy(data + (elem_size*array.count), items, elem_size * item_count);
 	array.count += item_count;
 	return array.count;
 }
@@ -479,7 +516,7 @@ __dynamic_array_append_nothing :: proc(array_: rawptr, elem_size, elem_align: in
 	}
 	data := cast(^byte)array.data;
 	assert(data != nil);
-	mem.zero(data + (elem_size*array.count), elem_size);
+	__mem_zero(data + (elem_size*array.count), elem_size);
 	array.count++;
 	return array.count;
 }
@@ -496,7 +533,7 @@ __slice_append :: proc(slice_: rawptr, elem_size, elem_align: int,
 	if item_count > 0 {
 		data := cast(^byte)slice.data;
 		assert(data != nil);
-		mem.copy(data + (elem_size*slice.count), items, elem_size * item_count);
+		__mem_copy(data + (elem_size*slice.count), items, elem_size * item_count);
 		slice.count += item_count;
 	}
 	return slice.count;
@@ -506,7 +543,14 @@ __slice_append :: proc(slice_: rawptr, elem_size, elem_align: int,
 // Map stuff
 
 __default_hash :: proc(data: []byte) -> u64 {
-	return hash.fnv64a(data);
+	fnv64a :: proc(data: []byte) -> u64 {
+		h: u64 = 0xcbf29ce484222325;
+		for b in data {
+			h = (h ~ cast(u64)b) * 0x100000001b3;
+		}
+		return h;
+	}
+	return fnv64a(data);
 }
 __default_hash_string :: proc(s: string) -> u64 {
 	return __default_hash(cast([]byte)s);
@@ -577,7 +621,7 @@ __dynamic_map_rehash :: proc(using header: __Map_Header, new_count: int) {
 		e := __dynamic_map_get_entry(new_header, j);
 		e.next = fr.entry_index;
 		ndata := cast(^byte)e;
-		mem.copy(ndata+value_offset, data+value_offset, entry_size-value_offset);
+		__mem_copy(ndata+value_offset, data+value_offset, entry_size-value_offset);
 		if __dynamic_map_full(new_header) {
 			__dynamic_map_grow(new_header);
 		}
@@ -618,7 +662,7 @@ __dynamic_map_set :: proc(using h: __Map_Header, key: __Map_Key, value: rawptr)
 	{
 		data := cast(^byte)__dynamic_map_get_entry(h, index);
 		val := data+value_offset;
-		mem.copy(val, value, entry_size-value_offset);
+		__mem_copy(val, value, entry_size-value_offset);
 	}
 
 	if __dynamic_map_full(h) {
@@ -698,7 +742,7 @@ __dynamic_map_erase :: proc(using h: __Map_Header, fr: __Map_Find_Result) {
 	if fr.entry_index == m.entries.count-1 {
 		m.entries.count--;
 	}
-	mem.copy(__dynamic_map_get_entry(h, fr.entry_index), __dynamic_map_get_entry(h, m.entries.count-1), entry_size);
+	__mem_copy(__dynamic_map_get_entry(h, fr.entry_index), __dynamic_map_get_entry(h, m.entries.count-1), entry_size);
 	last := __dynamic_map_find(h, __dynamic_map_get_entry(h, fr.entry_index).key);
 	if last.entry_prev >= 0 {
 		__dynamic_map_get_entry(h, last.entry_prev).next = fr.entry_index;

core/fmt.odin

@@ -115,6 +115,11 @@ write_type :: proc(buf: ^[]byte, ti: ^Type_Info) {
 		case 8:  write_string(buf, "complex64");
 		case 16: write_string(buf, "complex128");
 		}
+	case Quaternion:
+		match info.size {
+		case 16: write_string(buf, "quaternion128");
+		case 32: write_string(buf, "quaternion");
+		}
 	case String:  write_string(buf, "string");
 	case Boolean: write_string(buf, "bool");
 	case Pointer:
@@ -736,11 +741,12 @@ fmt_value :: proc(fi: ^Fmt_Info, v: any, verb: rune) {
 			fmt_value(fi, any{info.base, v.data}, verb);
 		}
 
-	case Boolean: fmt_arg(fi, v, verb);
-	case Float:   fmt_arg(fi, v, verb);
-	case Complex: fmt_arg(fi, v, verb);
-	case Integer: fmt_arg(fi, v, verb);
-	case String:  fmt_arg(fi, v, verb);
+	case Boolean:    fmt_arg(fi, v, verb);
+	case Integer:    fmt_arg(fi, v, verb);
+	case Float:      fmt_arg(fi, v, verb);
+	case Complex:    fmt_arg(fi, v, verb);
+	case Quaternion: fmt_arg(fi, v, verb);
+	case String:     fmt_arg(fi, v, verb);
 
 	case Pointer:
 		if v.type_info == type_info(^Type_Info) {
@@ -907,6 +913,33 @@ fmt_complex :: proc(fi: ^Fmt_Info, c: complex128, bits: int, verb: rune) {
 	}
 }
 
+fmt_quaternion :: proc(fi: ^Fmt_Info, c: quaternion256, bits: int, verb: rune) {
+	match verb {
+	case 'f', 'F', 'v':
+		r := real(c);
+		i := imag(c);
+		j := jmag(c);
+		k := kmag(c);
+		fmt_float(fi, r, bits/4, verb);
+
+		if !fi.plus && i >= 0 { write_rune(fi.buf, '+'); }
+		fmt_float(fi, i, bits/4, verb);
+		write_rune(fi.buf, 'i');
+
+		if !fi.plus && j >= 0 { write_rune(fi.buf, '+'); }
+		fmt_float(fi, j, bits/4, verb);
+		write_rune(fi.buf, 'j');
+
+		if !fi.plus && k >= 0 { write_rune(fi.buf, '+'); }
+		fmt_float(fi, k, bits/4, verb);
+		write_rune(fi.buf, 'k');
+
+	default:
+		fmt_bad_verb(fi, verb);
+		return;
+	}
+}
+
 fmt_arg :: proc(fi: ^Fmt_Info, arg: any, verb: rune) {
 	if arg.data == nil || arg.type_info == nil {
 		write_string(fi.buf, "<nil>");
@@ -927,11 +960,13 @@ fmt_arg :: proc(fi: ^Fmt_Info, arg: any, verb: rune) {
 	base_arg := arg;
 	base_arg.type_info = type_info_base(base_arg.type_info);
 	match a in base_arg {
-	case bool:       fmt_bool(fi, a, verb);
-	case f32:        fmt_float(fi, cast(f64)a, 32, verb);
-	case f64:        fmt_float(fi, a, 64, verb);
-	case complex64:  fmt_complex(fi, cast(complex128)a, 64, verb);
-	case complex128: fmt_complex(fi, a, 128, verb);
+	case bool:          fmt_bool(fi, a, verb);
+	case f32:           fmt_float(fi, cast(f64)a, 32, verb);
+	case f64:           fmt_float(fi, a, 64, verb);
+	case complex64:     fmt_complex(fi, cast(complex128)a, 64, verb);
+	case complex128:    fmt_complex(fi, a, 128, verb);
+	case quaternion128: fmt_quaternion(fi, cast(quaternion256)a, 128, verb);
+	case quaternion256: fmt_quaternion(fi, a, 256, verb);
 
 	case int:     fmt_int(fi, cast(u64)a, true,  8*size_of(int), verb);
 	case i8:      fmt_int(fi, cast(u64)a, true,  8, verb);

core/math.odin

@@ -43,8 +43,8 @@ pow  :: proc(x, power: f64) -> f64 #foreign __llvm_core "llvm.pow.f64";
 lerp :: proc(a, b, t: f32) -> f32 { return a*(1-t) + b*t; }
 lerp :: proc(a, b, t: f64) -> f64 { return a*(1-t) + b*t; }
 
-sign :: proc(x: f32) -> f32 { if x >= 0 { return +1; } return -1; }
-sign :: proc(x: f64) -> f64 { if x >= 0 { return +1; } return -1; }
+sign :: proc(x: f32) -> f32 { return x >= 0 ? +1 : -1; }
+sign :: proc(x: f64) -> f64 { return x >= 0 ? +1 : -1; }
 
 bit_reverse :: proc(b: u16) -> u16 #foreign __llvm_core "llvm.bitreverse.i16";
 bit_reverse :: proc(b: u32) -> u32 #foreign __llvm_core "llvm.bitreverse.i32";

core/types.odin

@@ -1,146 +1,100 @@
 is_signed :: proc(info: ^Type_Info) -> bool {
-	if is_integer(info) {
-		i := union_cast(^Type_Info.Integer)info;
+	info = type_info_base(info);
+	if i, ok := union_cast(^Type_Info.Integer)info; ok {
 		return i.signed;
 	}
-	if is_float(info) {
+	if _, ok := union_cast(^Type_Info.Float)info; ok {
 		return true;
 	}
 	return false;
 }
 is_integer :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Integer: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Integer)type_info_base(info);
+	return ok;
 }
 is_float :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Float: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Float)type_info_base(info);
+	return ok;
+}
+is_complex :: proc(info: ^Type_Info) -> bool {
+	if info == nil { return false; }
+	_, ok := union_cast(^Type_Info.Complex)type_info_base(info);
+	return ok;
 }
 is_any :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Any: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Any)type_info_base(info);
+	return ok;
 }
 is_string :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.String: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.String)type_info_base(info);
+	return ok;
 }
 is_boolean :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Boolean: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Boolean)type_info_base(info);
+	return ok;
 }
 is_pointer :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Pointer: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Pointer)type_info_base(info);
+	return ok;
 }
 is_procedure :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Procedure: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Procedure)type_info_base(info);
+	return ok;
 }
 is_array :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Array: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Array)type_info_base(info);
+	return ok;
 }
 is_dynamic_array :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Dynamic_Array: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Dynamic_Array)type_info_base(info);
+	return ok;
 }
 is_dynamic_map :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Map: return i.count == 0;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Map)type_info_base(info);
+	return ok;
 }
 is_slice :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Slice: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Slice)type_info_base(info);
+	return ok;
 }
 is_vector :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Vector: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Vector)type_info_base(info);
+	return ok;
 }
 is_tuple :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Tuple: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Tuple)type_info_base(info);
+	return ok;
 }
 is_struct :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Struct: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Struct)type_info_base(info);
+	return ok;
 }
 is_union :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Union: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Union)type_info_base(info);
+	return ok;
 }
 is_raw_union :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Raw_Union: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Raw_Union)type_info_base(info);
+	return ok;
 }
 is_enum :: proc(info: ^Type_Info) -> bool {
 	if info == nil { return false; }
-
-	match i in type_info_base(info) {
-	case Type_Info.Enum: return true;
-	}
-	return false;
+	_, ok := union_cast(^Type_Info.Enum)type_info_base(info);
+	return ok;
 }

src/check_expr.c

@@ -1782,10 +1782,41 @@ bool check_representable_as_constant(Checker *c, ExactValue in_value, Type *type
 				return true;
 			}
 		} break;
+		case Basic_UntypedComplex:
+			return true;
+		}
+
+		return false;
+	} else if (is_type_quaternion(type)) {
+		ExactValue v = exact_value_to_quaternion(in_value);
+		if (v.kind != ExactValue_Quaternion) {
+			return false;
+		}
+
+		switch (type->Basic.kind) {
+		case Basic_quaternion128:
+		case Basic_quaternion256: {
+			ExactValue real = exact_value_real(v);
+			ExactValue imag = exact_value_imag(v);
+			ExactValue jmag = exact_value_jmag(v);
+			ExactValue kmag = exact_value_kmag(v);
+			if (real.kind != ExactValue_Invalid &&
+			    imag.kind != ExactValue_Invalid &&
+			    jmag.kind != ExactValue_Invalid &&
+			    kmag.kind != ExactValue_Invalid) {
+				ExactValue ov = exact_binary_operator_value(Token_Add, real, exact_value_make_imag(imag));
+				ov = exact_binary_operator_value(Token_Add, ov, exact_value_make_jmag(jmag));
+				ov = exact_binary_operator_value(Token_Add, ov, exact_value_make_kmag(kmag));
+				if (out_value) *out_value = ov;
+				return true;
+			}
+		} break;
+		case Basic_UntypedQuaternion:
+			return true;
 		}
 
 		return false;
-	} else if (is_type_pointer(type)) {
+	}else if (is_type_pointer(type)) {
 		if (in_value.kind == ExactValue_Pointer) {
 			return true;
 		}
@@ -2213,6 +2244,10 @@ bool check_is_castable_to(Checker *c, Operand *operand, Type *y) {
 		return true;
 	}
 
+	if (is_type_quaternion(src) && is_type_quaternion(dst)) {
+		return true;
+	}
+
 	// Cast between pointers
 	if (is_type_pointer(src) && is_type_pointer(dst)) {
 		Type *s = base_type(type_deref(src));
@@ -2613,6 +2648,8 @@ void convert_to_typed(Checker *c, Operand *operand, Type *target_type, i32 level
 				break;
 			case Basic_UntypedInteger:
 			case Basic_UntypedFloat:
+			case Basic_UntypedComplex:
+			case Basic_UntypedQuaternion:
 			case Basic_UntypedRune:
 				if (!is_type_numeric(target_type)) {
 					operand->mode = Addressing_Invalid;
@@ -3605,44 +3642,24 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 			return false;
 		}
 
-		u32 flag = 0;
-		if (is_type_untyped(x.type)) {
-			flag |= 1;
-		}
-		if (is_type_untyped(y.type)) {
-			flag |= 2;
-		}
-		switch (flag) {
-		case 0: break;
-		case 1: convert_to_typed(c, &x, y.type, 0); break;
-		case 2: convert_to_typed(c, &y, x.type, 0); break;
-		case 3: {
-			if (x.mode == Addressing_Constant && y.mode == Addressing_Constant)  {
-				if (is_type_numeric(x.type) && exact_value_imag(x.value).value_float == 0) {
-					x.type = t_untyped_float;
-				}
-				if (is_type_numeric(y.type) && exact_value_imag(y.value).value_float == 0) {
-					y.type = t_untyped_float;
-				}
-			} else {
-				convert_to_typed(c, &x, t_f64, 0);
-				convert_to_typed(c, &y, t_f64, 0);
+		convert_to_typed(c, &x, y.type, 0); if (x.mode == Addressing_Invalid) return false;
+		convert_to_typed(c, &y, x.type, 0); if (y.mode == Addressing_Invalid) return false;
+		if (x.mode == Addressing_Constant &&
+		    y.mode == Addressing_Constant) {
+			if (is_type_numeric(x.type) && exact_value_imag(x.value).value_float == 0) {
+				x.type = t_untyped_float;
+			}
+			if (is_type_numeric(y.type) && exact_value_imag(y.value).value_float == 0) {
+				y.type = t_untyped_float;
 			}
-		} break;
-		}
-
-		if (x.mode == Addressing_Invalid || y.mode == Addressing_Invalid) {
-			return false;
 		}
 
 		if (!are_types_identical(x.type, y.type)) {
-			gbString type_x = type_to_string(x.type);
-			gbString type_y = type_to_string(y.type);
-			error_node(call,
-			      "Mismatched types to `complex`, `%s` vs `%s`",
-			      type_x, type_y);
-			gb_string_free(type_y);
-			gb_string_free(type_x);
+			gbString tx = type_to_string(x.type);
+			gbString ty = type_to_string(y.type);
+			error_node(call, "Mismatched types to `complex`, `%s` vs `%s`", tx, ty);
+			gb_string_free(ty);
+			gb_string_free(tx);
 			return false;
 		}
 
@@ -3669,37 +3686,170 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 		}
 	} break;
 
+	case BuiltinProc_quaternion: {
+		// quaternion :: proc(real, imag, jmag, kmag: float_type) -> quaternion_type
+		Operand x = *operand;
+		Operand y = {0};
+		Operand z = {0};
+		Operand w = {0};
+
+		GB_PANIC("BuiltinProc_quaternion");
+
+		// NOTE(bill): Invalid will be the default till fixed
+		operand->type = t_invalid;
+		operand->mode = Addressing_Invalid;
+
+		check_expr(c, &y, ce->args.e[1]); if (y.mode == Addressing_Invalid) return false;
+		check_expr(c, &z, ce->args.e[2]); if (z.mode == Addressing_Invalid) return false;
+		check_expr(c, &w, ce->args.e[3]); if (w.mode == Addressing_Invalid) return false;
+
+		convert_to_typed(c, &x, y.type, 0); if (x.mode == Addressing_Invalid) return false;
+		convert_to_typed(c, &x, z.type, 0); if (x.mode == Addressing_Invalid) return false;
+		convert_to_typed(c, &x, w.type, 0); if (x.mode == Addressing_Invalid) return false;
+
+		convert_to_typed(c, &y, z.type, 0); if (y.mode == Addressing_Invalid) return false;
+		convert_to_typed(c, &y, w.type, 0); if (y.mode == Addressing_Invalid) return false;
+		convert_to_typed(c, &y, x.type, 0); if (y.mode == Addressing_Invalid) return false;
+
+		convert_to_typed(c, &z, y.type, 0); if (z.mode == Addressing_Invalid) return false;
+		convert_to_typed(c, &z, w.type, 0); if (z.mode == Addressing_Invalid) return false;
+		convert_to_typed(c, &z, x.type, 0); if (z.mode == Addressing_Invalid) return false;
+
+		convert_to_typed(c, &w, x.type, 0); if (w.mode == Addressing_Invalid) return false;
+		convert_to_typed(c, &w, y.type, 0); if (w.mode == Addressing_Invalid) return false;
+		convert_to_typed(c, &w, z.type, 0); if (w.mode == Addressing_Invalid) return false;
+
+		if (x.mode == Addressing_Constant &&
+		    y.mode == Addressing_Constant &&
+		    z.mode == Addressing_Constant &&
+		    w.mode == Addressing_Constant) {
+			if (is_type_numeric(x.type) &&
+			    exact_value_imag(x.value).value_float == 0 &&
+			    exact_value_jmag(x.value).value_float == 0 &&
+			    exact_value_kmag(x.value).value_float == 0) {
+				x.type = t_untyped_float;
+			}
+			if (is_type_numeric(y.type) &&
+			    exact_value_imag(y.value).value_float == 0 &&
+			    exact_value_jmag(y.value).value_float == 0 &&
+			    exact_value_kmag(y.value).value_float == 0) {
+				y.type = t_untyped_float;
+			}
+			if (is_type_numeric(z.type) &&
+			    exact_value_imag(z.value).value_float == 0 &&
+			    exact_value_jmag(z.value).value_float == 0 &&
+			    exact_value_kmag(z.value).value_float == 0) {
+				z.type = t_untyped_float;
+			}
+			if (is_type_numeric(w.type) &&
+			    exact_value_imag(w.value).value_float == 0 &&
+			    exact_value_jmag(w.value).value_float == 0 &&
+			    exact_value_kmag(w.value).value_float == 0) {
+				w.type = t_untyped_float;
+			}
+		}
+
+		if (!are_types_identical(x.type, y.type)) {
+			gbString tx = type_to_string(x.type);
+			gbString ty = type_to_string(y.type);
+			gbString tz = type_to_string(z.type);
+			gbString tw = type_to_string(w.type);
+			error_node(call, "Mismatched types to `complex`, `%s`, `%s` `%s`, `%s`", tx, ty, tz, tw);
+			gb_string_free(tw);
+			gb_string_free(tz);
+			gb_string_free(ty);
+			gb_string_free(tx);
+			return false;
+		}
+
+		if (!is_type_float(x.type)) {
+			gbString s = type_to_string(x.type);
+			error_node(call, "Arguments have type `%s`, expected a floating point", s);
+			gb_string_free(s);
+			return false;
+		}
+
+		if (x.mode == Addressing_Constant &&
+		    y.mode == Addressing_Constant &&
+		    z.mode == Addressing_Constant &&
+		    w.mode == Addressing_Constant) {
+			ExactValue v = exact_binary_operator_value(Token_Add, x.value, y.value);
+			v = exact_binary_operator_value(Token_Add, v, z.value);
+			v = exact_binary_operator_value(Token_Add, v, w.value);
+			operand->value = v;
+			operand->mode = Addressing_Constant;
+		} else {
+			operand->mode = Addressing_Value;
+		}
+
+		BasicKind kind = core_type(x.type)->Basic.kind;
+		switch (kind) {
+		case Basic_complex64:         x.type = t_f32;           break;
+		case Basic_complex128:        x.type = t_f64;           break;
+		case Basic_UntypedComplex:    x.type = t_untyped_float; break;
+		case Basic_quaternion128:     x.type = t_f32;           break;
+		case Basic_quaternion256:     x.type = t_f64;           break;
+		case Basic_UntypedQuaternion: x.type = t_untyped_float; break;
+		default: GB_PANIC("Invalid type"); break;
+		}
+	} break;
+
 	case BuiltinProc_real:
-	case BuiltinProc_imag: {
-		// real :: proc(c: complex_type) -> float_type
-		// imag :: proc(c: complex_type) -> float_type
+	case BuiltinProc_imag:
+	case BuiltinProc_jmag:
+	case BuiltinProc_kmag: {
+		// real :: proc(x: type) -> float_type
+		// imag :: proc(x: type) -> float_type
+		// jmag :: proc(x: type) -> float_type
+		// kmag :: proc(x: type) -> float_type
 
 		Operand *x = operand;
 		if (is_type_untyped(x->type)) {
 			if (x->mode == Addressing_Constant) {
 				if (is_type_numeric(x->type)) {
-					x->type = t_untyped_complex;
+					if (id == BuiltinProc_jmag ||
+					    id == BuiltinProc_kmag) {
+						x->type = t_untyped_quaternion;
+					} else {
+						x->type = t_untyped_complex;
+					}
 				}
 			} else {
-				convert_to_typed(c, x, t_complex128, 0);
+				if (id == BuiltinProc_jmag ||
+				    id == BuiltinProc_kmag) {
+					convert_to_typed(c, x, t_quaternion256, 0);
+				} else {
+					convert_to_typed(c, x, t_complex128, 0);
+				}
 				if (x->mode == Addressing_Invalid) {
 					return false;
 				}
 			}
 		}
 
-		if (!is_type_complex(x->type)) {
-			gbString s = type_to_string(x->type);
-			error_node(call, "Argument has type `%s`, expected a complex type", s);
-			gb_string_free(s);
-			return false;
+		if (id == BuiltinProc_jmag ||
+		    id == BuiltinProc_kmag) {
+			if (!is_type_quaternion(x->type)) {
+				gbString s = type_to_string(x->type);
+				error_node(call, "Argument has type `%s`, expected a complex type", s);
+				gb_string_free(s);
+				return false;
+			}
+		} else {
+			if (!is_type_complex(x->type) && !is_type_quaternion(x->type)) {
+				gbString s = type_to_string(x->type);
+				error_node(call, "Argument has type `%s`, expected a complex or quaternion type", s);
+				gb_string_free(s);
+				return false;
+			}
 		}
 
 		if (x->mode == Addressing_Constant) {
-			if (id == BuiltinProc_real) {
-				x->value = exact_value_real(x->value);
-			} else {
-				x->value = exact_value_imag(x->value);
+			switch (id) {
+			case BuiltinProc_real: x->value = exact_value_real(x->value); break;
+			case BuiltinProc_imag: x->value = exact_value_imag(x->value); break;
+			case BuiltinProc_jmag: x->value = exact_value_jmag(x->value); break;
+			case BuiltinProc_kmag: x->value = exact_value_kmag(x->value); break;
 			}
 		} else {
 			x->mode = Addressing_Value;
@@ -3707,13 +3857,50 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 
 		BasicKind kind = core_type(x->type)->Basic.kind;
 		switch (kind) {
-		case Basic_complex64:      x->type = t_f32;           break;
-		case Basic_complex128:     x->type = t_f64;           break;
-		case Basic_UntypedComplex: x->type = t_untyped_float; break;
+		case Basic_complex64:         x->type = t_f32;           break;
+		case Basic_complex128:        x->type = t_f64;           break;
+		case Basic_UntypedComplex:    x->type = t_untyped_float; break;
+		case Basic_quaternion128:     x->type = t_f32;           break;
+		case Basic_quaternion256:     x->type = t_f64;           break;
+		case Basic_UntypedQuaternion: x->type = t_untyped_float; break;
 		default: GB_PANIC("Invalid type"); break;
 		}
 	} break;
 
+	case BuiltinProc_conj: {
+		// conj :: proc(x: type) -> type
+		Operand *x = operand;
+		if (is_type_complex(x->type)) {
+			if (x->mode == Addressing_Constant) {
+				ExactValue v = exact_value_to_complex(x->value);
+				f64 r = v.value_complex.real;
+				f64 i = v.value_complex.imag;
+				x->value = exact_value_complex(r, i);
+				x->mode = Addressing_Constant;
+			} else {
+				x->mode = Addressing_Value;
+			}
+		} else if (is_type_quaternion(x->type)) {
+			if (x->mode == Addressing_Constant) {
+				ExactValue v = exact_value_to_quaternion(x->value);
+				f64 r = v.value_quaternion.real;
+				f64 i = v.value_quaternion.imag;
+				f64 j = v.value_quaternion.jmag;
+				f64 k = v.value_quaternion.kmag;
+				x->value = exact_value_quaternion(r, i, j, k);
+				x->mode = Addressing_Constant;
+			} else {
+				x->mode = Addressing_Value;
+			}
+		} else {
+			gbString s = type_to_string(x->type);
+			error_node(call, "Expected a complex or quaternion, got `%s`", s);
+			gb_string_free(s);
+			return false;
+		}
+
+	} break;
+
 	case BuiltinProc_slice_ptr: {
 		// slice_ptr :: proc(a: ^T, len: int) -> []T
 		// slice_ptr :: proc(a: ^T, len, cap: int) -> []T
@@ -3721,16 +3908,13 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 		Type *ptr_type = base_type(operand->type);
 		if (!is_type_pointer(ptr_type)) {
 			gbString type_str = type_to_string(operand->type);
-			error_node(call,
-			      "Expected a pointer to `slice_ptr`, got `%s`",
-			      type_str);
+			error_node(call, "Expected a pointer to `slice_ptr`, got `%s`", type_str);
 			gb_string_free(type_str);
 			return false;
 		}
 
 		if (ptr_type == t_rawptr) {
-			error_node(call,
-			      "`rawptr` cannot have pointer arithmetic");
+			error_node(call, "`rawptr` cannot have pointer arithmetic");
 			return false;
 		}
 
@@ -3775,11 +3959,11 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 	} break;
 
 	case BuiltinProc_min: {
-		// min :: proc(a, b: comparable) -> comparable
+		// min :: proc(a, b: ordered) -> ordered
 		Type *type = base_type(operand->type);
-		if (!is_type_comparable(type) || !(is_type_numeric(type) || is_type_string(type))) {
+		if (!is_type_ordered(type) || !(is_type_numeric(type) || is_type_string(type))) {
 			gbString type_str = type_to_string(operand->type);
-			error_node(call, "Expected a comparable numeric type to `min`, got `%s`", type_str);
+			error_node(call, "Expected a ordered numeric type to `min`, got `%s`", type_str);
 			gb_string_free(type_str);
 			return false;
 		}
@@ -3791,10 +3975,10 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 		if (b.mode == Addressing_Invalid) {
 			return false;
 		}
-		if (!is_type_comparable(b.type) || !(is_type_numeric(b.type) || is_type_string(b.type))) {
+		if (!is_type_ordered(b.type) || !(is_type_numeric(b.type) || is_type_string(b.type))) {
 			gbString type_str = type_to_string(b.type);
 			error_node(call,
-			      "Expected a comparable numeric type to `min`, got `%s`",
+			      "Expected a ordered numeric type to `min`, got `%s`",
 			      type_str);
 			gb_string_free(type_str);
 			return false;
@@ -3841,12 +4025,12 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 	} break;
 
 	case BuiltinProc_max: {
-		// min :: proc(a, b: comparable) -> comparable
+		// min :: proc(a, b: ordered) -> ordered
 		Type *type = base_type(operand->type);
-		if (!is_type_comparable(type) || !(is_type_numeric(type) || is_type_string(type))) {
+		if (!is_type_ordered(type) || !(is_type_numeric(type) || is_type_string(type))) {
 			gbString type_str = type_to_string(operand->type);
 			error_node(call,
-			      "Expected a comparable numeric or string type to `max`, got `%s`",
+			      "Expected a ordered numeric or string type to `max`, got `%s`",
 			      type_str);
 			gb_string_free(type_str);
 			return false;
@@ -3859,10 +4043,10 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 		if (b.mode == Addressing_Invalid) {
 			return false;
 		}
-		if (!is_type_comparable(b.type) || !(is_type_numeric(b.type) || is_type_string(b.type))) {
+		if (!is_type_ordered(b.type) || !(is_type_numeric(b.type) || is_type_string(b.type))) {
 			gbString type_str = type_to_string(b.type);
 			error_node(call,
-			      "Expected a comparable numeric or string type to `max`, got `%s`",
+			      "Expected a ordered numeric or string type to `max`, got `%s`",
 			      type_str);
 			gb_string_free(type_str);
 			return false;
@@ -3910,12 +4094,9 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 
 	case BuiltinProc_abs: {
 		// abs :: proc(n: numeric) -> numeric
-		Type *type = base_type(operand->type);
-		if (!is_type_numeric(type)) {
+		if (!is_type_numeric(operand->type) && !is_type_vector(operand->type)) {
 			gbString type_str = type_to_string(operand->type);
-			error_node(call,
-			      "Expected a numeric type to `abs`, got `%s`",
-			      type_str);
+			error_node(call, "Expected a numeric type to `abs`, got `%s`", type_str);
 			gb_string_free(type_str);
 			return false;
 		}
@@ -3928,6 +4109,18 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 			case ExactValue_Float:
 				operand->value.value_float = gb_abs(operand->value.value_float);
 				break;
+			case ExactValue_Complex: {
+				f64 r = operand->value.value_complex.real;
+				f64 i = operand->value.value_complex.imag;
+				operand->value = exact_value_float(gb_sqrt(r*r + i*i));
+			} break;
+			case ExactValue_Quaternion: {
+				f64 r = operand->value.value_complex.real;
+				f64 i = operand->value.value_complex.imag;
+				f64 j = operand->value.value_complex.imag;
+				f64 k = operand->value.value_complex.imag;
+				operand->value = exact_value_float(gb_sqrt(r*r + i*i + j*j + k*k));
+			} break;
 			default:
 				GB_PANIC("Invalid numeric constant");
 				break;
@@ -3936,17 +4129,20 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 			operand->mode = Addressing_Value;
 		}
 
-		operand->type = type;
+		if (is_type_complex(operand->type)) {
+			operand->type = base_complex_elem_type(operand->type);
+		} else if (is_type_quaternion(operand->type)) {
+			operand->type = base_quaternion_elem_type(operand->type);
+		}
+		GB_ASSERT(!is_type_complex(operand->type) && !is_type_quaternion(operand->type));
 	} break;
 
 	case BuiltinProc_clamp: {
-		// clamp :: proc(a, min, max: comparable) -> comparable
+		// clamp :: proc(a, min, max: ordered) -> ordered
 		Type *type = base_type(operand->type);
-		if (!is_type_comparable(type) || !(is_type_numeric(type) || is_type_string(type))) {
+		if (!is_type_ordered(type) || !(is_type_numeric(type) || is_type_string(type))) {
 			gbString type_str = type_to_string(operand->type);
-			error_node(call,
-			      "Expected a comparable numeric or string type to `clamp`, got `%s`",
-			      type_str);
+			error_node(call, "Expected a ordered numeric or string type to `clamp`, got `%s`", type_str);
 			gb_string_free(type_str);
 			return false;
 		}
@@ -3961,11 +4157,9 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 		if (y.mode == Addressing_Invalid) {
 			return false;
 		}
-		if (!is_type_comparable(y.type) || !(is_type_numeric(y.type) || is_type_string(y.type))) {
+		if (!is_type_ordered(y.type) || !(is_type_numeric(y.type) || is_type_string(y.type))) {
 			gbString type_str = type_to_string(y.type);
-			error_node(call,
-			      "Expected a comparable numeric or string type to `clamp`, got `%s`",
-			      type_str);
+			error_node(call, "Expected a ordered numeric or string type to `clamp`, got `%s`", type_str);
 			gb_string_free(type_str);
 			return false;
 		}
@@ -3974,11 +4168,9 @@ bool check_builtin_procedure(Checker *c, Operand *operand, AstNode *call, i32 id
 		if (z.mode == Addressing_Invalid) {
 			return false;
 		}
-		if (!is_type_comparable(z.type) || !(is_type_numeric(z.type) || is_type_string(z.type))) {
+		if (!is_type_ordered(z.type) || !(is_type_numeric(z.type) || is_type_string(z.type))) {
 			gbString type_str = type_to_string(z.type);
-			error_node(call,
-			      "Expected a comparable numeric or string type to `clamp`, got `%s`",
-			      type_str);
+			error_node(call, "Expected a ordered numeric or string type to `clamp`, got `%s`", type_str);
 			gb_string_free(type_str);
 			return false;
 		}
@@ -4551,9 +4743,18 @@ ExprKind check_expr_base_internal(Checker *c, Operand *o, AstNode *node, Type *t
 		switch (bl->kind) {
 		case Token_Integer: t = t_untyped_integer; break;
 		case Token_Float:   t = t_untyped_float;   break;
-		case Token_Imag:    t = t_untyped_complex; break;
 		case Token_String:  t = t_untyped_string;  break;
 		case Token_Rune:    t = t_untyped_rune;    break;
+		case Token_Imag: {
+			String s = bl->string;
+			Rune r = s.text[s.len-1];
+			switch (r) {
+			case 'i': t = t_untyped_complex; break;
+			case 'j': case 'k':
+				t = t_untyped_quaternion;
+				break;
+			}
+		} break;
 		default:            GB_PANIC("Unknown literal"); break;
 		}
 		o->mode  = Addressing_Constant;

src/checker.c

@@ -53,8 +53,12 @@ typedef enum BuiltinProcId {
 	BuiltinProc_swizzle,
 
 	BuiltinProc_complex,
+	BuiltinProc_quaternion,
 	BuiltinProc_real,
 	BuiltinProc_imag,
+	BuiltinProc_jmag,
+	BuiltinProc_kmag,
+	BuiltinProc_conj,
 
 	// BuiltinProc_ptr_offset,
 	// BuiltinProc_ptr_sub,
@@ -101,8 +105,12 @@ gb_global BuiltinProc builtin_procs[BuiltinProc_Count] = {
 	{STR_LIT("swizzle"),          1, true,  Expr_Expr},
 
 	{STR_LIT("complex"),          2, false, Expr_Expr},
+	{STR_LIT("quaternion"),       4, false, Expr_Expr},
 	{STR_LIT("real"),             1, false, Expr_Expr},
 	{STR_LIT("imag"),             1, false, Expr_Expr},
+	{STR_LIT("jmag"),             1, false, Expr_Expr},
+	{STR_LIT("kmag"),             1, false, Expr_Expr},
+	{STR_LIT("conj"),             1, false, Expr_Expr},
 
 	// {STR_LIT("ptr_offset"),       2, false, Expr_Expr},
 	// {STR_LIT("ptr_sub"),          2, false, Expr_Expr},
@@ -957,6 +965,15 @@ void add_type_info_type(Checker *c, Type *t) {
 			add_type_info_type(c, t_type_info_float);
 			add_type_info_type(c, t_f64);
 			break;
+
+		case Basic_quaternion128:
+			add_type_info_type(c, t_type_info_float);
+			add_type_info_type(c, t_f32);
+			break;
+		case Basic_quaternion256:
+			add_type_info_type(c, t_type_info_float);
+			add_type_info_type(c, t_f64);
+			break;
 		}
 	} break;
 
@@ -1145,33 +1162,35 @@ void init_preload(Checker *c) {
 
 
 
-		if (record->variant_count != 20) {
+		if (record->variant_count != 21) {
 			compiler_error("Invalid `Type_Info` layout");
 		}
 		t_type_info_named         = record->variants[ 1]->type;
 		t_type_info_integer       = record->variants[ 2]->type;
 		t_type_info_float         = record->variants[ 3]->type;
 		t_type_info_complex       = record->variants[ 4]->type;
-		t_type_info_string        = record->variants[ 5]->type;
-		t_type_info_boolean       = record->variants[ 6]->type;
-		t_type_info_any           = record->variants[ 7]->type;
-		t_type_info_pointer       = record->variants[ 8]->type;
-		t_type_info_procedure     = record->variants[ 9]->type;
-		t_type_info_array         = record->variants[10]->type;
-		t_type_info_dynamic_array = record->variants[11]->type;
-		t_type_info_slice         = record->variants[12]->type;
-		t_type_info_vector        = record->variants[13]->type;
-		t_type_info_tuple         = record->variants[14]->type;
-		t_type_info_struct        = record->variants[15]->type;
-		t_type_info_raw_union     = record->variants[16]->type;
-		t_type_info_union         = record->variants[17]->type;
-		t_type_info_enum          = record->variants[18]->type;
-		t_type_info_map           = record->variants[19]->type;
+		t_type_info_quaternion    = record->variants[ 5]->type;
+		t_type_info_string        = record->variants[ 6]->type;
+		t_type_info_boolean       = record->variants[ 7]->type;
+		t_type_info_any           = record->variants[ 8]->type;
+		t_type_info_pointer       = record->variants[ 9]->type;
+		t_type_info_procedure     = record->variants[10]->type;
+		t_type_info_array         = record->variants[11]->type;
+		t_type_info_dynamic_array = record->variants[12]->type;
+		t_type_info_slice         = record->variants[13]->type;
+		t_type_info_vector        = record->variants[14]->type;
+		t_type_info_tuple         = record->variants[15]->type;
+		t_type_info_struct        = record->variants[16]->type;
+		t_type_info_raw_union     = record->variants[17]->type;
+		t_type_info_union         = record->variants[18]->type;
+		t_type_info_enum          = record->variants[19]->type;
+		t_type_info_map           = record->variants[20]->type;
 
 		t_type_info_named_ptr         = make_type_pointer(c->allocator, t_type_info_named);
 		t_type_info_integer_ptr       = make_type_pointer(c->allocator, t_type_info_integer);
 		t_type_info_float_ptr         = make_type_pointer(c->allocator, t_type_info_float);
 		t_type_info_complex_ptr       = make_type_pointer(c->allocator, t_type_info_complex);
+		t_type_info_quaternion_ptr   = make_type_pointer(c->allocator, t_type_info_quaternion);
 		t_type_info_string_ptr        = make_type_pointer(c->allocator, t_type_info_string);
 		t_type_info_boolean_ptr       = make_type_pointer(c->allocator, t_type_info_boolean);
 		t_type_info_any_ptr           = make_type_pointer(c->allocator, t_type_info_any);

src/common.c

@@ -2,6 +2,8 @@
 #define GB_IMPLEMENTATION
 #include "gb/gb.h"
 
+#include <math.h>
+
 gbAllocator heap_allocator(void) {
 	return gb_heap_allocator();
 }
@@ -104,6 +106,10 @@ i16 f32_to_f16(f32 value) {
 	}
 }
 
+f64 gb_sqrt(f64 x) {
+	return sqrt(x);
+}
+
 
 
 #define for_array(index_, array_) for (isize index_ = 0; index_ < (array_).count; index_++)

src/exact_value.c

@@ -5,6 +5,14 @@
 
 typedef struct AstNode AstNode;
 
+typedef struct Complex128 {
+	f64 real, imag;
+} Complex128;
+
+typedef struct Quaternion256 {
+	f64 real, imag, jmag, kmag;
+} Quaternion256;
+
 typedef enum ExactValueKind {
 	ExactValue_Invalid,
 
@@ -13,26 +21,24 @@ typedef enum ExactValueKind {
 	ExactValue_Integer,
 	ExactValue_Float,
 	ExactValue_Complex,
+	ExactValue_Quaternion,
 	ExactValue_Pointer,
 	ExactValue_Compound, // TODO(bill): Is this good enough?
 
 	ExactValue_Count,
 } ExactValueKind;
 
-typedef struct Complex128 {
-	f64 real, imag;
-} Complex128;
-
 typedef struct ExactValue {
 	ExactValueKind kind;
 	union {
-		bool       value_bool;
-		String     value_string;
-		i64        value_integer; // NOTE(bill): This must be an integer and not a pointer
-		f64        value_float;
-		i64        value_pointer;
-		Complex128 value_complex;
-		AstNode *  value_compound;
+		bool          value_bool;
+		String        value_string;
+		i64           value_integer; // NOTE(bill): This must be an integer and not a pointer
+		f64           value_float;
+		i64           value_pointer;
+		Complex128    value_complex;
+		Quaternion256 value_quaternion;
+		AstNode *     value_compound;
 	};
 } ExactValue;
 
@@ -79,6 +85,16 @@ ExactValue exact_value_complex(f64 real, f64 imag) {
 	return result;
 }
 
+ExactValue exact_value_quaternion(f64 real, f64 imag, f64 jmag, f64 kmag) {
+	ExactValue result = {ExactValue_Quaternion};
+	result.value_quaternion.real = real;
+	result.value_quaternion.imag = imag;
+	result.value_quaternion.jmag = jmag;
+	result.value_quaternion.kmag = kmag;
+	return result;
+}
+
+
 ExactValue exact_value_pointer(i64 ptr) {
 	ExactValue result = {ExactValue_Pointer};
 	result.value_pointer = ptr;
@@ -216,9 +232,15 @@ ExactValue exact_value_from_basic_literal(Token token) {
 	case Token_Float:   return exact_value_float_from_string(token.string);
 	case Token_Imag: {
 		String str = token.string;
-		str.len--; // Ignore the `i`
+		Rune last_rune = cast(Rune)str.text[str.len-1];
+		str.len--; // Ignore the `i|j|k`
 		f64 imag = float_from_string(str);
-		return exact_value_complex(0, imag);
+
+		switch (last_rune) {
+		case 'i': return exact_value_complex(0, imag);
+		case 'j': return exact_value_quaternion(0, 0, imag, 0);
+		case 'k': return exact_value_quaternion(0, 0, 0, imag);
+		}
 	}
 	case Token_Rune: {
 		Rune r = GB_RUNE_INVALID;
@@ -278,6 +300,23 @@ ExactValue exact_value_to_complex(ExactValue v) {
 	return r;
 }
 
+
+ExactValue exact_value_to_quaternion(ExactValue v) {
+	switch (v.kind) {
+	case ExactValue_Integer:
+		return exact_value_quaternion(cast(i64)v.value_integer, 0, 0, 0);
+	case ExactValue_Float:
+		return exact_value_quaternion(v.value_float, 0, 0, 0);
+	case ExactValue_Complex:
+		return exact_value_quaternion(v.value_complex.real, v.value_complex.imag, 0, 0);
+	case ExactValue_Quaternion:
+		return v;
+	}
+	ExactValue r = {ExactValue_Invalid};
+	return r;
+}
+
+
 ExactValue exact_value_real(ExactValue v) {
 	switch (v.kind) {
 	case ExactValue_Integer:
@@ -285,6 +324,8 @@ ExactValue exact_value_real(ExactValue v) {
 		return v;
 	case ExactValue_Complex:
 		return exact_value_float(v.value_complex.real);
+	case ExactValue_Quaternion:
+		return exact_value_float(v.value_quaternion.real);
 	}
 	ExactValue r = {ExactValue_Invalid};
 	return r;
@@ -297,11 +338,39 @@ ExactValue exact_value_imag(ExactValue v) {
 		return exact_value_integer(0);
 	case ExactValue_Complex:
 		return exact_value_float(v.value_complex.imag);
+	case ExactValue_Quaternion:
+		return exact_value_float(v.value_quaternion.imag);
 	}
 	ExactValue r = {ExactValue_Invalid};
 	return r;
 }
 
+ExactValue exact_value_jmag(ExactValue v) {
+	switch (v.kind) {
+	case ExactValue_Integer:
+	case ExactValue_Float:
+	case ExactValue_Complex:
+		return exact_value_integer(0);
+	case ExactValue_Quaternion:
+		return exact_value_float(v.value_quaternion.jmag);
+	}
+	ExactValue r = {ExactValue_Invalid};
+	return r;
+}
+ExactValue exact_value_kmag(ExactValue v) {
+	switch (v.kind) {
+	case ExactValue_Integer:
+	case ExactValue_Float:
+	case ExactValue_Complex:
+		return exact_value_integer(0);
+	case ExactValue_Quaternion:
+		return exact_value_float(v.value_quaternion.kmag);
+	}
+	ExactValue r = {ExactValue_Invalid};
+	return r;
+}
+
+
 ExactValue exact_value_make_imag(ExactValue v) {
 	switch (v.kind) {
 	case ExactValue_Integer:
@@ -314,6 +383,30 @@ ExactValue exact_value_make_imag(ExactValue v) {
 	ExactValue r = {ExactValue_Invalid};
 	return r;
 }
+ExactValue exact_value_make_jmag(ExactValue v) {
+	switch (v.kind) {
+	case ExactValue_Integer:
+		return exact_value_quaternion(0, 0, exact_value_to_float(v).value_float, 0);
+	case ExactValue_Float:
+		return exact_value_quaternion(0, 0, v.value_float, 0);
+	default:
+		GB_PANIC("Expected an integer or float type for `exact_value_make_jmag`");
+	}
+	ExactValue r = {ExactValue_Invalid};
+	return r;
+}
+ExactValue exact_value_make_kmag(ExactValue v) {
+	switch (v.kind) {
+	case ExactValue_Integer:
+		return exact_value_quaternion(0, 0, 0, exact_value_to_float(v).value_float);
+	case ExactValue_Float:
+		return exact_value_quaternion(0, 0, 0, v.value_float);
+	default:
+		GB_PANIC("Expected an integer or float type for `exact_value_make_kmag`");
+	}
+	ExactValue r = {ExactValue_Invalid};
+	return r;
+}
 
 
 
@@ -325,6 +418,7 @@ ExactValue exact_unary_operator_value(TokenKind op, ExactValue v, i32 precision)
 		case ExactValue_Integer:
 		case ExactValue_Float:
 		case ExactValue_Complex:
+		case ExactValue_Quaternion:
 			return v;
 		}
 	} break;
@@ -348,6 +442,13 @@ ExactValue exact_unary_operator_value(TokenKind op, ExactValue v, i32 precision)
 			f64 imag = v.value_complex.imag;
 			return exact_value_complex(-real, -imag);
 		}
+		case ExactValue_Quaternion: {
+			f64 real = v.value_quaternion.real;
+			f64 imag = v.value_quaternion.imag;
+			f64 jmag = v.value_quaternion.jmag;
+			f64 kmag = v.value_quaternion.kmag;
+			return exact_value_quaternion(-real, -imag, -jmag, -kmag);
+		}
 		}
 	} break;
 
@@ -403,8 +504,10 @@ i32 exact_value_order(ExactValue v) {
 		return 3;
 	case ExactValue_Complex:
 		return 4;
-	case ExactValue_Pointer:
+	case ExactValue_Quaternion:
 		return 5;
+	case ExactValue_Pointer:
+		return 6;
 
 	default:
 		GB_PANIC("How'd you get here? Invalid Value.kind");
@@ -426,6 +529,7 @@ void match_exact_values(ExactValue *x, ExactValue *y) {
 	case ExactValue_Bool:
 	case ExactValue_String:
 	case ExactValue_Complex:
+	case ExactValue_Quaternion:
 		return;
 
 	case ExactValue_Integer:
@@ -439,15 +543,22 @@ void match_exact_values(ExactValue *x, ExactValue *y) {
 		case ExactValue_Complex:
 			*x = exact_value_complex(cast(f64)x->value_integer, 0);
 			return;
+		case ExactValue_Quaternion:
+			*x = exact_value_quaternion(cast(f64)x->value_integer, 0, 0, 0);
+			return;
 		}
 		break;
 
 	case ExactValue_Float:
-		if (y->kind == ExactValue_Float) {
+		switch (y->kind) {
+		case ExactValue_Float:
 			return;
-		} else if (y->kind == ExactValue_Complex) {
+		case ExactValue_Complex:
 			*x = exact_value_to_complex(*x);
 			return;
+		case ExactValue_Quaternion:
+			*x = exact_value_to_quaternion(*x);
+			return;
 		}
 		break;
 	}
@@ -538,6 +649,53 @@ ExactValue exact_binary_operator_value(TokenKind op, ExactValue x, ExactValue y)
 		}
 		return exact_value_complex(real, imag);
 	} break;
+
+	case ExactValue_Quaternion: {
+		y = exact_value_to_quaternion(y);
+		f64 a = x.value_quaternion.real;
+		f64 b = x.value_quaternion.imag;
+		f64 c = x.value_quaternion.jmag;
+		f64 d = x.value_quaternion.kmag;
+
+		f64 e = x.value_quaternion.real;
+		f64 f = x.value_quaternion.imag;
+		f64 g = x.value_quaternion.jmag;
+		f64 h = x.value_quaternion.kmag;
+
+		f64 real = 0;
+		f64 imag = 0;
+		f64 jmag = 0;
+		f64 kmag = 0;
+		switch (op) {
+		case Token_Add:
+			real = a + e;
+			imag = b + f;
+			jmag = c + g;
+			kmag = d + h;
+			break;
+		case Token_Sub:
+			real = a - e;
+			imag = b - f;
+			jmag = c - g;
+			kmag = d - h;
+			break;
+		case Token_Mul:
+			real = a*f + b*e + c*h - d*g;
+			imag = a*g - b*h + c*e + d*f;
+			jmag = a*h + b*g - c*f + d*e;
+			kmag = a*e - b*f - c*g - d*h;
+			break;
+		case Token_Quo: {
+			f64 s = e*e + f*f + g*g + h*h;
+			real = (+a*e + b*f + c*g + d*h)/s;
+			imag = (-a*f + b*e - c*h + d*h)/s;
+			jmag = (-a*g + b*h + c*e - d*f)/s;
+			kmag = (-a*h - b*g + c*f + d*e)/s;
+		} break;
+		default: goto error;
+		}
+		return exact_value_quaternion(real, imag, jmag, kmag);
+	} break;
 	}
 
 error:
@@ -609,6 +767,23 @@ bool compare_exact_values(TokenKind op, ExactValue x, ExactValue y) {
 		}
 	} break;
 
+	case ExactValue_Quaternion: {
+		f64 a = x.value_quaternion.real;
+		f64 b = x.value_quaternion.imag;
+		f64 c = x.value_quaternion.jmag;
+		f64 d = x.value_quaternion.kmag;
+
+		f64 e = y.value_quaternion.real;
+		f64 f = y.value_quaternion.imag;
+		f64 g = y.value_quaternion.jmag;
+		f64 h = y.value_quaternion.kmag;
+
+		switch (op) {
+		case Token_CmpEq: return cmp_f64(a, e) == 0 && cmp_f64(b, f) == 0 && cmp_f64(c, g) == 0 && cmp_f64(d, h) == 0;
+		case Token_NotEq: return cmp_f64(a, e) != 0 || cmp_f64(b, f) != 0 || cmp_f64(c, g) != 0 || cmp_f64(d, h) != 0;
+		}
+	} break;
+
 	case ExactValue_String: {
 		String a = x.value_string;
 		String b = y.value_string;

src/ir.c

@@ -1351,6 +1351,7 @@ irValue *ir_emit_store(irProcedure *p, irValue *address, irValue *value) {
 	return ir_emit(p, ir_instr_store(p, address, value));
 }
 irValue *ir_emit_load(irProcedure *p, irValue *address) {
+	GB_ASSERT(address != NULL);
 	return ir_emit(p, ir_instr_load(p, address));
 }
 irValue *ir_emit_select(irProcedure *p, irValue *cond, irValue *t, irValue *f) {
@@ -1719,11 +1720,7 @@ irValue *ir_emit_arith(irProcedure *proc, TokenKind op, irValue *left, irValue *
 
 	if (is_type_complex(t_left)) {
 		ir_emit_comment(proc, str_lit("complex.arith.begin"));
-		Type *tl = core_type(t_left);
-		Type *ft = t_f32;
-		if (tl->Basic.kind == Basic_complex128) {
-			ft = t_f64;
-		}
+		Type *ft = base_complex_elem_type(t_left);
 
 		irValue *res = ir_add_local_generated(proc, type);
 		irValue *a = ir_emit_struct_ev(proc, left,  0);
@@ -1773,6 +1770,126 @@ irValue *ir_emit_arith(irProcedure *proc, TokenKind op, irValue *left, irValue *
 
 		ir_emit_comment(proc, str_lit("complex.end.begin"));
 		return ir_emit_load(proc, res);
+	} else if (is_type_quaternion(t_left)) {
+		ir_emit_comment(proc, str_lit("quaternion.arith.begin"));
+		Type *ft = base_quaternion_elem_type(t_left);
+
+		irValue *res = ir_add_local_generated(proc, type);
+		irValue *a = ir_emit_struct_ev(proc, left,  0);
+		irValue *b = ir_emit_struct_ev(proc, left,  1);
+		irValue *c = ir_emit_struct_ev(proc, left,  2);
+		irValue *d = ir_emit_struct_ev(proc, left,  3);
+
+		irValue *e = ir_emit_struct_ev(proc, right, 0);
+		irValue *f = ir_emit_struct_ev(proc, right, 1);
+		irValue *g = ir_emit_struct_ev(proc, right, 2);
+		irValue *h = ir_emit_struct_ev(proc, right, 3);
+
+		irValue *real = NULL;
+		irValue *imag = NULL;
+		irValue *jmag = NULL;
+		irValue *kmag = NULL;
+
+		switch (op) {
+		case Token_Add:
+			real = ir_emit_arith(proc, Token_Add, a, e, ft);
+			imag = ir_emit_arith(proc, Token_Add, b, f, ft);
+			jmag = ir_emit_arith(proc, Token_Add, c, g, ft);
+			kmag = ir_emit_arith(proc, Token_Add, d, h, ft);
+			break;
+		case Token_Sub:
+			real = ir_emit_arith(proc, Token_Sub, a, e, ft);
+			imag = ir_emit_arith(proc, Token_Sub, b, f, ft);
+			jmag = ir_emit_arith(proc, Token_Sub, c, g, ft);
+			kmag = ir_emit_arith(proc, Token_Sub, d, h, ft);
+			break;
+		case Token_Mul: {
+			irValue *r0 = ir_emit_arith(proc, Token_Mul, a, e, ft);
+			irValue *r1 = ir_emit_arith(proc, Token_Mul, b, f, ft);
+			irValue *r2 = ir_emit_arith(proc, Token_Mul, c, h, ft);
+			irValue *r3 = ir_emit_arith(proc, Token_Mul, d, g, ft);
+			real = ir_emit_arith(proc, Token_Add, r0, r1, ft);
+			real = ir_emit_arith(proc, Token_Add, real, r2, ft);
+			real = ir_emit_arith(proc, Token_Add, real, r3, ft);
+
+			irValue *i0 = ir_emit_arith(proc, Token_Mul, a, g, ft);
+			irValue *i1 = ir_emit_arith(proc, Token_Mul, b, h, ft);
+			irValue *i2 = ir_emit_arith(proc, Token_Mul, c, e, ft);
+			irValue *i3 = ir_emit_arith(proc, Token_Mul, d, f, ft);
+			imag = ir_emit_arith(proc, Token_Sub, i0, i1, ft);
+			imag = ir_emit_arith(proc, Token_Add, imag, i2, ft);
+			imag = ir_emit_arith(proc, Token_Add, imag, i3, ft);
+
+			irValue *j0 = ir_emit_arith(proc, Token_Mul, a, h, ft);
+			irValue *j1 = ir_emit_arith(proc, Token_Mul, b, g, ft);
+			irValue *j2 = ir_emit_arith(proc, Token_Mul, c, f, ft);
+			irValue *j3 = ir_emit_arith(proc, Token_Mul, d, e, ft);
+			jmag = ir_emit_arith(proc, Token_Add, j0, j1, ft);
+			jmag = ir_emit_arith(proc, Token_Sub, imag, j2, ft);
+			jmag = ir_emit_arith(proc, Token_Sub, imag, j3, ft);
+
+			irValue *k0 = ir_emit_arith(proc, Token_Mul, a, e, ft);
+			irValue *k1 = ir_emit_arith(proc, Token_Mul, b, f, ft);
+			irValue *k2 = ir_emit_arith(proc, Token_Mul, c, g, ft);
+			irValue *k3 = ir_emit_arith(proc, Token_Mul, d, h, ft);
+			kmag = ir_emit_arith(proc, Token_Sub, j0, j1, ft);
+			kmag = ir_emit_arith(proc, Token_Sub, imag, j2, ft);
+			kmag = ir_emit_arith(proc, Token_Sub, imag, j3, ft);
+		} break;
+		case Token_Quo: {
+			irValue *s0 = ir_emit_arith(proc, Token_Mul, e, e, ft);
+			irValue *s1 = ir_emit_arith(proc, Token_Mul, f, f, ft);
+			irValue *s2 = ir_emit_arith(proc, Token_Mul, g, g, ft);
+			irValue *s3 = ir_emit_arith(proc, Token_Mul, h, h, ft);
+			irValue *s = ir_emit_arith(proc, Token_Add, s0, s1, ft);
+			s = ir_emit_arith(proc, Token_Add, s, s2, ft);
+			s = ir_emit_arith(proc, Token_Add, s, s3, ft);
+
+			irValue *r0 = ir_emit_arith(proc, Token_Mul, a, e, ft);
+			irValue *r1 = ir_emit_arith(proc, Token_Mul, b, f, ft);
+			irValue *r2 = ir_emit_arith(proc, Token_Mul, c, h, ft);
+			irValue *r3 = ir_emit_arith(proc, Token_Mul, d, g, ft);
+			real = ir_emit_arith(proc, Token_Add, r0, r1, ft);
+			real = ir_emit_arith(proc, Token_Add, real, r2, ft);
+			real = ir_emit_arith(proc, Token_Add, real, r3, ft);
+			real = ir_emit_arith(proc, Token_Quo, real, s, ft);
+
+			irValue *i0 = ir_emit_arith(proc, Token_Mul, a, f, ft);
+			irValue *i1 = ir_emit_arith(proc, Token_Mul, b, e, ft);
+			irValue *i2 = ir_emit_arith(proc, Token_Mul, c, h, ft);
+			irValue *i3 = ir_emit_arith(proc, Token_Mul, d, g, ft);
+			imag = ir_emit_arith(proc, Token_Sub, i1, i0, ft);
+			imag = ir_emit_arith(proc, Token_Sub, imag, i2, ft);
+			imag = ir_emit_arith(proc, Token_Add, imag, i3, ft);
+			imag = ir_emit_arith(proc, Token_Quo, imag, s, ft);
+
+			irValue *j0 = ir_emit_arith(proc, Token_Mul, a, g, ft);
+			irValue *j1 = ir_emit_arith(proc, Token_Mul, b, h, ft);
+			irValue *j2 = ir_emit_arith(proc, Token_Mul, c, e, ft);
+			irValue *j3 = ir_emit_arith(proc, Token_Mul, d, f, ft);
+			jmag = ir_emit_arith(proc, Token_Sub, j1, j0, ft);
+			jmag = ir_emit_arith(proc, Token_Add, imag, j2, ft);
+			jmag = ir_emit_arith(proc, Token_Sub, imag, j3, ft);
+			jmag = ir_emit_arith(proc, Token_Quo, jmag, s, ft);
+
+			irValue *k0 = ir_emit_arith(proc, Token_Mul, a, h, ft);
+			irValue *k1 = ir_emit_arith(proc, Token_Mul, b, g, ft);
+			irValue *k2 = ir_emit_arith(proc, Token_Mul, c, f, ft);
+			irValue *k3 = ir_emit_arith(proc, Token_Mul, d, e, ft);
+			kmag = ir_emit_arith(proc, Token_Add, k2, k3, ft);
+			kmag = ir_emit_arith(proc, Token_Sub, imag, k0, ft);
+			kmag = ir_emit_arith(proc, Token_Sub, imag, k1, ft);
+			kmag = ir_emit_arith(proc, Token_Quo, kmag, s, ft);
+		} break;
+		}
+
+		ir_emit_store(proc, ir_emit_struct_ep(proc, res, 0), real);
+		ir_emit_store(proc, ir_emit_struct_ep(proc, res, 1), imag);
+		ir_emit_store(proc, ir_emit_struct_ep(proc, res, 2), jmag);
+		ir_emit_store(proc, ir_emit_struct_ep(proc, res, 3), kmag);
+
+		ir_emit_comment(proc, str_lit("quaternion.end.begin"));
+		return ir_emit_load(proc, res);
 	}
 
 
@@ -1950,13 +2067,18 @@ irValue *ir_emit_struct_ep(irProcedure *proc, irValue *s, i32 index) {
 		GB_ASSERT(gb_is_between(index, 0, t->Tuple.variable_count-1));
 		result_type = make_type_pointer(a, t->Tuple.variables[index]->type);
 	} else if (is_type_complex(t)) {
-		Type *ft = t_f32;
-		if (core_type(t)->Basic.kind == Basic_complex128) {
-			ft = t_f64;
+		Type *ft = base_complex_elem_type(t);
+		switch (index) {
+		case 0: result_type = make_type_pointer(a, ft); break;
+		case 1: result_type = make_type_pointer(a, ft); break;
 		}
+	} else if (is_type_quaternion(t)) {
+		Type *ft = base_quaternion_elem_type(t);
 		switch (index) {
 		case 0: result_type = make_type_pointer(a, ft); break;
 		case 1: result_type = make_type_pointer(a, ft); break;
+		case 2: result_type = make_type_pointer(a, ft); break;
+		case 3: result_type = make_type_pointer(a, ft); break;
 		}
 	} else if (is_type_slice(t)) {
 		switch (index) {
@@ -2025,13 +2147,18 @@ irValue *ir_emit_struct_ev(irProcedure *proc, irValue *s, i32 index) {
 		GB_ASSERT(gb_is_between(index, 0, t->Tuple.variable_count-1));
 		result_type = t->Tuple.variables[index]->type;
 	} else if (is_type_complex(t)) {
-		Type *ft = t_f32;
-		if (core_type(t)->Basic.kind == Basic_complex128) {
-			ft = t_f64;
+		Type *ft = base_complex_elem_type(t);
+		switch (index) {
+		case 0: result_type = ft; break;
+		case 1: result_type = ft; break;
 		}
+	} else if (is_type_quaternion(t)) {
+		Type *ft = base_quaternion_elem_type(t);
 		switch (index) {
 		case 0: result_type = ft; break;
 		case 1: result_type = ft; break;
+		case 2: result_type = ft; break;
+		case 3: result_type = ft; break;
 		}
 	} else if (is_type_slice(t)) {
 		switch (index) {
@@ -2364,6 +2491,8 @@ irValue *ir_emit_conv(irProcedure *proc, irValue *value, Type *t) {
 				ev = exact_value_to_float(ev);
 			} else if (is_type_complex(dst)) {
 				ev = exact_value_to_complex(ev);
+			} else if (is_type_quaternion(dst)) {
+				ev = exact_value_to_quaternion(ev);
 			} else if (is_type_string(dst)) {
 				// Handled elsewhere
 				GB_ASSERT(ev.kind == ExactValue_String);
@@ -2439,6 +2568,20 @@ irValue *ir_emit_conv(irProcedure *proc, irValue *value, Type *t) {
 		return ir_emit_load(proc, gen);
 	}
 
+	if (is_type_quaternion(src) && is_type_quaternion(dst)) {
+		Type *ft = base_quaternion_elem_type(dst);
+		irValue *gen = ir_add_local_generated(proc, dst);
+		irValue *real = ir_emit_conv(proc, ir_emit_struct_ev(proc, value, 0), ft);
+		irValue *imag = ir_emit_conv(proc, ir_emit_struct_ev(proc, value, 1), ft);
+		irValue *jmag = ir_emit_conv(proc, ir_emit_struct_ev(proc, value, 2), ft);
+		irValue *kmag = ir_emit_conv(proc, ir_emit_struct_ev(proc, value, 3), ft);
+		ir_emit_store(proc, ir_emit_struct_ep(proc, gen, 0), real);
+		ir_emit_store(proc, ir_emit_struct_ep(proc, gen, 1), imag);
+		ir_emit_store(proc, ir_emit_struct_ep(proc, gen, 2), jmag);
+		ir_emit_store(proc, ir_emit_struct_ep(proc, gen, 3), kmag);
+		return ir_emit_load(proc, gen);
+	}
+
 	// float <-> integer
 	if (is_type_float(src) && is_type_integer(dst)) {
 		irConvKind kind = irConv_fptosi;
@@ -3800,29 +3943,88 @@ irValue *ir_build_expr(irProcedure *proc, AstNode *expr) {
 					irValue *dst = ir_add_local_generated(proc, tv->type);
 
 					Type *ft = base_complex_elem_type(tv->type);
-					irValue *rp = ir_emit_struct_ep(proc, dst, 0);
-					irValue *ip = ir_emit_struct_ep(proc, dst, 1);
+					real = ir_emit_conv(proc, real, ft);
+					imag = ir_emit_conv(proc, imag, ft);
+					ir_emit_store(proc, ir_emit_struct_ep(proc, dst, 0), real);
+					ir_emit_store(proc, ir_emit_struct_ep(proc, dst, 1), imag);
+
+					return ir_emit_load(proc, dst);
+				} break;
+
+				case BuiltinProc_quaternion: {
+					ir_emit_comment(proc, str_lit("quaternion"));
+					irValue *real = ir_build_expr(proc, ce->args.e[0]);
+					irValue *imag = ir_build_expr(proc, ce->args.e[1]);
+					irValue *jmag = ir_build_expr(proc, ce->args.e[2]);
+					irValue *kmag = ir_build_expr(proc, ce->args.e[3]);
+					irValue *dst = ir_add_local_generated(proc, tv->type);
 
+					Type *ft = base_complex_elem_type(tv->type);
 					real = ir_emit_conv(proc, real, ft);
 					imag = ir_emit_conv(proc, imag, ft);
-					ir_emit_store(proc, rp, real);
-					ir_emit_store(proc, ip, imag);
+					jmag = ir_emit_conv(proc, jmag, ft);
+					kmag = ir_emit_conv(proc, kmag, ft);
+					ir_emit_store(proc, ir_emit_struct_ep(proc, dst, 0), real);
+					ir_emit_store(proc, ir_emit_struct_ep(proc, dst, 1), imag);
+					ir_emit_store(proc, ir_emit_struct_ep(proc, dst, 2), jmag);
+					ir_emit_store(proc, ir_emit_struct_ep(proc, dst, 3), kmag);
 
 					return ir_emit_load(proc, dst);
 				} break;
 
 				case BuiltinProc_real: {
 					ir_emit_comment(proc, str_lit("real"));
-					irValue *complex = ir_build_expr(proc, ce->args.e[0]);
-					irValue *real = ir_emit_struct_ev(proc, complex, 0);
+					irValue *val = ir_build_expr(proc, ce->args.e[0]);
+					irValue *real = ir_emit_struct_ev(proc, val, 0);
 					return ir_emit_conv(proc, real, tv->type);
 				} break;
 				case BuiltinProc_imag: {
 					ir_emit_comment(proc, str_lit("imag"));
-					irValue *complex = ir_build_expr(proc, ce->args.e[0]);
-					irValue *imag = ir_emit_struct_ev(proc, complex, 1);
+					irValue *val = ir_build_expr(proc, ce->args.e[0]);
+					irValue *imag = ir_emit_struct_ev(proc, val, 1);
 					return ir_emit_conv(proc, imag, tv->type);
 				} break;
+				case BuiltinProc_jmag: {
+					ir_emit_comment(proc, str_lit("jmag"));
+					irValue *val = ir_build_expr(proc, ce->args.e[0]);
+					irValue *jmag = ir_emit_struct_ev(proc, val, 2);
+					return ir_emit_conv(proc, jmag, tv->type);
+				} break;
+				case BuiltinProc_kmag: {
+					ir_emit_comment(proc, str_lit("kmag"));
+					irValue *val = ir_build_expr(proc, ce->args.e[0]);
+					irValue *kmag = ir_emit_struct_ev(proc, val, 3);
+					return ir_emit_conv(proc, kmag, tv->type);
+				} break;
+
+				case BuiltinProc_conj: {
+					ir_emit_comment(proc, str_lit("conj"));
+					irValue *val = ir_build_expr(proc, ce->args.e[0]);
+					irValue *res = NULL;
+					Type *t = ir_type(val);
+					if (is_type_complex(t)) {
+						irValue *res = ir_add_local_generated(proc, tv->type);
+						irValue *real = ir_emit_struct_ev(proc, val, 0);
+						irValue *imag = ir_emit_struct_ev(proc, val, 1);
+						imag = ir_emit_unary_arith(proc, Token_Sub, imag, ir_type(imag));
+						ir_emit_store(proc, ir_emit_struct_ep(proc, res, 0), real);
+						ir_emit_store(proc, ir_emit_struct_ep(proc, res, 1), imag);
+					} else if (is_type_quaternion(t)) {
+						irValue *res = ir_add_local_generated(proc, tv->type);
+						irValue *real = ir_emit_struct_ev(proc, val, 0);
+						irValue *imag = ir_emit_struct_ev(proc, val, 1);
+						irValue *jmag = ir_emit_struct_ev(proc, val, 2);
+						irValue *kmag = ir_emit_struct_ev(proc, val, 3);
+						imag = ir_emit_unary_arith(proc, Token_Sub, imag, ir_type(imag));
+						jmag = ir_emit_unary_arith(proc, Token_Sub, jmag, ir_type(jmag));
+						kmag = ir_emit_unary_arith(proc, Token_Sub, kmag, ir_type(kmag));
+						ir_emit_store(proc, ir_emit_struct_ep(proc, res, 0), real);
+						ir_emit_store(proc, ir_emit_struct_ep(proc, res, 1), imag);
+						ir_emit_store(proc, ir_emit_struct_ep(proc, res, 2), jmag);
+						ir_emit_store(proc, ir_emit_struct_ep(proc, res, 3), kmag);
+					}
+					return ir_emit_load(proc, res);
+				} break;
 
 				case BuiltinProc_slice_ptr: {
 					ir_emit_comment(proc, str_lit("slice_ptr"));
@@ -3880,6 +4082,27 @@ irValue *ir_build_expr(irProcedure *proc, AstNode *expr) {
 					ir_emit_comment(proc, str_lit("abs"));
 					irValue *x = ir_build_expr(proc, ce->args.e[0]);
 					Type *t = ir_type(x);
+					if (is_type_complex(t)) {
+						gbAllocator a = proc->module->allocator;
+						i64 sz = 8*type_size_of(a, t);
+						irValue **args = gb_alloc_array(a, irValue *, 1);
+						args[0] = x;
+						switch (sz) {
+						case 64:  return ir_emit_global_call(proc, "__abs_complex64",  args, 1);
+						case 128: return ir_emit_global_call(proc, "__abs_complex128", args, 1);
+						}
+						GB_PANIC("Unknown complex type");
+					} else if (is_type_quaternion(t)) {
+						gbAllocator a = proc->module->allocator;
+						i64 sz = 8*type_size_of(a, t);
+						irValue **args = gb_alloc_array(a, irValue *, 1);
+						args[0] = x;
+						switch (sz) {
+						case 128: return ir_emit_global_call(proc, "__abs_quaternion128", args, 1);
+						case 256: return ir_emit_global_call(proc, "__abs_quaternion256", args, 1);
+						}
+						GB_PANIC("Unknown quaternion type");
+					}
 					irValue *zero = ir_emit_conv(proc, v_zero, t);
 					irValue *cond = ir_emit_comp(proc, Token_Lt, x, zero);
 					irValue *neg = ir_emit(proc, ir_instr_unary_op(proc, Token_Sub, x, t));
@@ -6659,21 +6882,25 @@ void ir_gen_tree(irGen *s) {
 					} break;
 
 					case Basic_f32:
-					case Basic_f64:
-					{
+					case Basic_f64: {
 						tag = ir_emit_conv(proc, ti_ptr, t_type_info_float_ptr);
 						irValue *bits = ir_const_int(a, type_size_of(a, t));
 						ir_emit_store(proc, ir_emit_struct_ep(proc, tag, 0), bits);
 					} break;
 
 					case Basic_complex64:
-					case Basic_complex128:
-					{
+					case Basic_complex128: {
 						tag = ir_emit_conv(proc, ti_ptr, t_type_info_complex_ptr);
 						irValue *bits = ir_const_int(a, type_size_of(a, t));
 						ir_emit_store(proc, ir_emit_struct_ep(proc, tag, 0), bits);
 					} break;
 
+					case Basic_quaternion128:
+					case Basic_quaternion256: {
+						tag = ir_emit_conv(proc, ti_ptr, t_type_info_quaternion_ptr);
+						irValue *bits = ir_const_int(a, type_size_of(a, t));
+						ir_emit_store(proc, ir_emit_struct_ep(proc, tag, 0), bits);
+					} break;
 
 					case Basic_rawptr:
 						tag = ir_emit_conv(proc, ti_ptr, t_type_info_pointer_ptr);

src/ir_print.c

@@ -145,28 +145,30 @@ void ir_print_type(irFileBuffer *f, irModule *m, Type *t) {
 	switch (t->kind) {
 	case Type_Basic:
 		switch (t->Basic.kind) {
-		case Basic_bool:   ir_fprintf(f, "i1");                      return;
-		case Basic_i8:     ir_fprintf(f, "i8");                      return;
-		case Basic_u8:     ir_fprintf(f, "i8");                      return;
-		case Basic_i16:    ir_fprintf(f, "i16");                     return;
-		case Basic_u16:    ir_fprintf(f, "i16");                     return;
-		case Basic_i32:    ir_fprintf(f, "i32");                     return;
-		case Basic_u32:    ir_fprintf(f, "i32");                     return;
-		case Basic_i64:    ir_fprintf(f, "i64");                     return;
-		case Basic_u64:    ir_fprintf(f, "i64");                     return;
-
-		case Basic_f32:    ir_fprintf(f, "float");                   return;
-		case Basic_f64:    ir_fprintf(f, "double");                  return;
-
-		case Basic_complex64:  ir_fprintf(f, "%%..complex64");       return;
-		case Basic_complex128: ir_fprintf(f, "%%..complex128");      return;
-
-
-		case Basic_rawptr: ir_fprintf(f, "%%..rawptr");              return;
-		case Basic_string: ir_fprintf(f, "%%..string");              return;
-		case Basic_uint:   ir_fprintf(f, "i%lld", word_bits);        return;
-		case Basic_int:    ir_fprintf(f, "i%lld", word_bits);        return;
-		case Basic_any:    ir_fprintf(f, "%%..any");                 return;
+		case Basic_bool:   ir_fprintf(f, "i1");                       return;
+		case Basic_i8:     ir_fprintf(f, "i8");                       return;
+		case Basic_u8:     ir_fprintf(f, "i8");                       return;
+		case Basic_i16:    ir_fprintf(f, "i16");                      return;
+		case Basic_u16:    ir_fprintf(f, "i16");                      return;
+		case Basic_i32:    ir_fprintf(f, "i32");                      return;
+		case Basic_u32:    ir_fprintf(f, "i32");                      return;
+		case Basic_i64:    ir_fprintf(f, "i64");                      return;
+		case Basic_u64:    ir_fprintf(f, "i64");                      return;
+
+		case Basic_f32:    ir_fprintf(f, "float");                    return;
+		case Basic_f64:    ir_fprintf(f, "double");                   return;
+
+		case Basic_complex64:  ir_fprintf(f, "%%..complex64");        return;
+		case Basic_complex128: ir_fprintf(f, "%%..complex128");       return;
+
+		case Basic_quaternion128: ir_fprintf(f, "%%..quaternion128"); return;
+		case Basic_quaternion256: ir_fprintf(f, "%%..quaternion256"); return;
+
+		case Basic_rawptr: ir_fprintf(f, "%%..rawptr");               return;
+		case Basic_string: ir_fprintf(f, "%%..string");               return;
+		case Basic_uint:   ir_fprintf(f, "i%lld", word_bits);         return;
+		case Basic_int:    ir_fprintf(f, "i%lld", word_bits);         return;
+		case Basic_any:    ir_fprintf(f, "%%..any");                  return;
 		}
 		break;
 	case Type_Pointer:
@@ -391,17 +393,42 @@ void ir_print_exact_value(irFileBuffer *f, irModule *m, ExactValue value, Type *
 	} break;
 
 	case ExactValue_Complex: {
-		GB_ASSERT_MSG(is_type_complex(type), "%s", type_to_string(type));
 		type = core_type(type);
-		Type *ft = base_complex_elem_type(type);
-		ir_fprintf(f, " {");
-		ir_print_type(f, m, ft);
-		ir_fprintf(f, " ");
-		ir_print_exact_value(f, m, exact_value_float(value.value_complex.real), ft);
-		ir_fprintf(f, ", ");
-		ir_print_type(f, m, ft);
-		ir_fprintf(f, " ");
-		ir_print_exact_value(f, m, exact_value_float(value.value_complex.imag), ft);
+		if (is_type_quaternion(type)) {
+			Type *ft = base_quaternion_elem_type(type);
+			ir_fprintf(f, " {"); ir_print_type(f, m, ft); ir_fprintf(f, " ");
+			ir_print_exact_value(f, m, exact_value_float(value.value_complex.real), ft);
+			ir_fprintf(f, ", "); ir_print_type(f, m, ft); ir_fprintf(f, " ");
+			ir_print_exact_value(f, m, exact_value_float(value.value_complex.imag), ft);
+			ir_fprintf(f, ", "); ir_print_type(f, m, ft); ir_fprintf(f, " ");
+			ir_print_exact_value(f, m, exact_value_float(0), ft);
+			ir_fprintf(f, ", "); ir_print_type(f, m, ft); ir_fprintf(f, " ");
+			ir_print_exact_value(f, m, exact_value_float(0), ft);
+			ir_fprintf(f, "}");
+
+		} else {
+			GB_ASSERT_MSG(is_type_complex(type), "%s", type_to_string(type));
+			Type *ft = base_complex_elem_type(type);
+			ir_fprintf(f, " {"); ir_print_type(f, m, ft); ir_fprintf(f, " ");
+			ir_print_exact_value(f, m, exact_value_float(value.value_complex.real), ft);
+			ir_fprintf(f, ", "); ir_print_type(f, m, ft); ir_fprintf(f, " ");
+			ir_print_exact_value(f, m, exact_value_float(value.value_complex.imag), ft);
+			ir_fprintf(f, "}");
+		}
+	} break;
+
+	case ExactValue_Quaternion: {
+		GB_ASSERT_MSG(is_type_quaternion(type), "%s", type_to_string(type));
+		type = core_type(type);
+		Type *ft = base_quaternion_elem_type(type);
+		ir_fprintf(f, " {"); ir_print_type(f, m, ft); ir_fprintf(f, " ");
+		ir_print_exact_value(f, m, exact_value_float(value.value_quaternion.real), ft);
+		ir_fprintf(f, ", "); ir_print_type(f, m, ft); ir_fprintf(f, " ");
+		ir_print_exact_value(f, m, exact_value_float(value.value_quaternion.imag), ft);
+		ir_fprintf(f, ", "); ir_print_type(f, m, ft); ir_fprintf(f, " ");
+		ir_print_exact_value(f, m, exact_value_float(value.value_quaternion.jmag), ft);
+		ir_fprintf(f, ", "); ir_print_type(f, m, ft); ir_fprintf(f, " ");
+		ir_print_exact_value(f, m, exact_value_float(value.value_quaternion.kmag), ft);
 		ir_fprintf(f, "}");
 	} break;
 
@@ -1008,6 +1035,72 @@ void ir_print_instr(irFileBuffer *f, irModule *m, irValue *value) {
 				case Token_LtEq:  ir_fprintf(f, "ole"); break;
 				case Token_GtEq:  ir_fprintf(f, "oge"); break;
 				}
+			} else if (is_type_complex(elem_type)) {
+				ir_fprintf(f, "call ");
+				ir_print_calling_convention(f, m, ProcCC_Odin);
+				ir_print_type(f, m, t_bool);
+				char *runtime_proc = "";
+				i64 sz = 8*type_size_of(m->allocator, elem_type);
+				switch (sz) {
+				case 64:
+					switch (bo->op) {
+					case Token_CmpEq: runtime_proc = "__complex64_eq"; break;
+					case Token_NotEq: runtime_proc = "__complex64_ne"; break;
+					}
+					break;
+				case 128:
+					switch (bo->op) {
+					case Token_CmpEq: runtime_proc = "__complex128_eq"; break;
+					case Token_NotEq: runtime_proc = "__complex128_ne"; break;
+					}
+					break;
+				}
+
+				ir_fprintf(f, " ");
+				ir_print_encoded_global(f, make_string_c(runtime_proc), false);
+				ir_fprintf(f, "(");
+				ir_print_type(f, m, type);
+				ir_fprintf(f, " ");
+				ir_print_value(f, m, bo->left, type);
+				ir_fprintf(f, ", ");
+				ir_print_type(f, m, type);
+				ir_fprintf(f, " ");
+				ir_print_value(f, m, bo->right, type);
+				ir_fprintf(f, ")\n");
+				return;
+			} else if (is_type_quaternion(elem_type)) {
+				ir_fprintf(f, "call ");
+				ir_print_calling_convention(f, m, ProcCC_Odin);
+				ir_print_type(f, m, t_bool);
+				char *runtime_proc = "";
+				i64 sz = 8*type_size_of(m->allocator, elem_type);
+				switch (sz) {
+				case 128:
+					switch (bo->op) {
+					case Token_CmpEq: runtime_proc = "__quaternion128_eq"; break;
+					case Token_NotEq: runtime_proc = "__quaternion128_ne"; break;
+					}
+					break;
+				case 256:
+					switch (bo->op) {
+					case Token_CmpEq: runtime_proc = "__quaternion256_eq"; break;
+					case Token_NotEq: runtime_proc = "__quaternion256_ne"; break;
+					}
+					break;
+				}
+
+				ir_fprintf(f, " ");
+				ir_print_encoded_global(f, make_string_c(runtime_proc), false);
+				ir_fprintf(f, "(");
+				ir_print_type(f, m, type);
+				ir_fprintf(f, " ");
+				ir_print_value(f, m, bo->left, type);
+				ir_fprintf(f, ", ");
+				ir_print_type(f, m, type);
+				ir_fprintf(f, " ");
+				ir_print_value(f, m, bo->right, type);
+				ir_fprintf(f, ")\n");
+				return;
 			} else {
 				ir_fprintf(f, "icmp ");
 				if (bo->op != Token_CmpEq &&
@@ -1420,6 +1513,10 @@ void print_llvm_ir(irGen *ir) {
 	ir_fprintf(f, " = type {float, float} ; Basic_complex64\n");
 	ir_print_encoded_local(f, str_lit("..complex128"));
 	ir_fprintf(f, " = type {double, double} ; Basic_complex128\n");
+	ir_print_encoded_local(f, str_lit("..quaternion128"));
+	ir_fprintf(f, " = type {float, float, float, float} ; Basic_quaternion128\n");
+	ir_print_encoded_local(f, str_lit("..quaternion256"));
+	ir_fprintf(f, " = type {double, double, double, double} ; Basic_quaternion256\n");
 
 
 	ir_print_encoded_local(f, str_lit("..any"));

src/tokenizer.c

@@ -578,9 +578,11 @@ exponent:
 		scan_mantissa(t, 10);
 	}
 
-	if (t->curr_rune == 'i') {
+	switch (t->curr_rune) {
+	case 'i': case 'j': case 'k':
 		token.kind = Token_Imag;
 		advance_to_next_rune(t);
+		break;
 	}
 
 end:

src/types.c

@@ -18,6 +18,9 @@ typedef enum BasicKind {
 	Basic_complex64,
 	Basic_complex128,
 
+	Basic_quaternion128,
+	Basic_quaternion256,
+
 	Basic_int,
 	Basic_uint,
 	Basic_rawptr,
@@ -28,6 +31,7 @@ typedef enum BasicKind {
 	Basic_UntypedInteger,
 	Basic_UntypedFloat,
 	Basic_UntypedComplex,
+	Basic_UntypedQuaternion,
 	Basic_UntypedString,
 	Basic_UntypedRune,
 	Basic_UntypedNil,
@@ -39,18 +43,19 @@ typedef enum BasicKind {
 } BasicKind;
 
 typedef enum BasicFlag {
-	BasicFlag_Boolean  = GB_BIT(0),
-	BasicFlag_Integer  = GB_BIT(1),
-	BasicFlag_Unsigned = GB_BIT(2),
-	BasicFlag_Float    = GB_BIT(3),
-	BasicFlag_Complex  = GB_BIT(4),
-	BasicFlag_Pointer  = GB_BIT(5),
-	BasicFlag_String   = GB_BIT(6),
-	BasicFlag_Rune     = GB_BIT(7),
-	BasicFlag_Untyped  = GB_BIT(8),
-
-	BasicFlag_Numeric      = BasicFlag_Integer | BasicFlag_Float | BasicFlag_Complex,
-	BasicFlag_Ordered      = BasicFlag_Numeric | BasicFlag_String  | BasicFlag_Pointer,
+	BasicFlag_Boolean     = GB_BIT(0),
+	BasicFlag_Integer     = GB_BIT(1),
+	BasicFlag_Unsigned    = GB_BIT(2),
+	BasicFlag_Float       = GB_BIT(3),
+	BasicFlag_Complex     = GB_BIT(4),
+	BasicFlag_Quaternion  = GB_BIT(5),
+	BasicFlag_Pointer     = GB_BIT(6),
+	BasicFlag_String      = GB_BIT(7),
+	BasicFlag_Rune        = GB_BIT(8),
+	BasicFlag_Untyped     = GB_BIT(9),
+
+	BasicFlag_Numeric      = BasicFlag_Integer | BasicFlag_Float   | BasicFlag_Complex | BasicFlag_Quaternion,
+	BasicFlag_Ordered      = BasicFlag_Integer | BasicFlag_Float   | BasicFlag_String  | BasicFlag_Pointer,
 	BasicFlag_ConstantType = BasicFlag_Boolean | BasicFlag_Numeric | BasicFlag_Pointer | BasicFlag_String | BasicFlag_Rune,
 } BasicFlag;
 
@@ -198,39 +203,43 @@ void selection_add_index(Selection *s, isize index) {
 
 
 gb_global Type basic_types[] = {
-	{Type_Basic, {Basic_Invalid,        0,                                       0, STR_LIT("invalid type")}},
-
-	{Type_Basic, {Basic_bool,           BasicFlag_Boolean,                       1, STR_LIT("bool")}},
-
-	{Type_Basic, {Basic_i8,             BasicFlag_Integer,                       1, STR_LIT("i8")}},
-	{Type_Basic, {Basic_u8,             BasicFlag_Integer | BasicFlag_Unsigned,  1, STR_LIT("u8")}},
-	{Type_Basic, {Basic_i16,            BasicFlag_Integer,                       2, STR_LIT("i16")}},
-	{Type_Basic, {Basic_u16,            BasicFlag_Integer | BasicFlag_Unsigned,  2, STR_LIT("u16")}},
-	{Type_Basic, {Basic_i32,            BasicFlag_Integer,                       4, STR_LIT("i32")}},
-	{Type_Basic, {Basic_u32,            BasicFlag_Integer | BasicFlag_Unsigned,  4, STR_LIT("u32")}},
-	{Type_Basic, {Basic_i64,            BasicFlag_Integer,                       8, STR_LIT("i64")}},
-	{Type_Basic, {Basic_u64,            BasicFlag_Integer | BasicFlag_Unsigned,  8, STR_LIT("u64")}},
-
-	{Type_Basic, {Basic_f32,            BasicFlag_Float,                         4, STR_LIT("f32")}},
-	{Type_Basic, {Basic_f64,            BasicFlag_Float,                         8, STR_LIT("f64")}},
-
-	{Type_Basic, {Basic_complex64,      BasicFlag_Complex,                       8, STR_LIT("complex64")}},
-	{Type_Basic, {Basic_complex128,     BasicFlag_Complex,                      16, STR_LIT("complex128")}},
-
-	{Type_Basic, {Basic_int,            BasicFlag_Integer,                      -1, STR_LIT("int")}},
-	{Type_Basic, {Basic_uint,           BasicFlag_Integer | BasicFlag_Unsigned, -1, STR_LIT("uint")}},
-
-	{Type_Basic, {Basic_rawptr,         BasicFlag_Pointer,                      -1, STR_LIT("rawptr")}},
-	{Type_Basic, {Basic_string,         BasicFlag_String,                       -1, STR_LIT("string")}},
-	{Type_Basic, {Basic_any,            0,                                      -1, STR_LIT("any")}},
-
-	{Type_Basic, {Basic_UntypedBool,    BasicFlag_Boolean | BasicFlag_Untyped,   0, STR_LIT("untyped bool")}},
-	{Type_Basic, {Basic_UntypedInteger, BasicFlag_Integer | BasicFlag_Untyped,   0, STR_LIT("untyped integer")}},
-	{Type_Basic, {Basic_UntypedFloat,   BasicFlag_Float   | BasicFlag_Untyped,   0, STR_LIT("untyped float")}},
-	{Type_Basic, {Basic_UntypedComplex, BasicFlag_Complex | BasicFlag_Untyped,   0, STR_LIT("untyped complex")}},
-	{Type_Basic, {Basic_UntypedString,  BasicFlag_String  | BasicFlag_Untyped,   0, STR_LIT("untyped string")}},
-	{Type_Basic, {Basic_UntypedRune,    BasicFlag_Integer | BasicFlag_Untyped,   0, STR_LIT("untyped rune")}},
-	{Type_Basic, {Basic_UntypedNil,     BasicFlag_Untyped,                       0, STR_LIT("untyped nil")}},
+	{Type_Basic, {Basic_Invalid,           0,                                          0, STR_LIT("invalid type")}},
+
+	{Type_Basic, {Basic_bool,              BasicFlag_Boolean,                          1, STR_LIT("bool")}},
+
+	{Type_Basic, {Basic_i8,                BasicFlag_Integer,                          1, STR_LIT("i8")}},
+	{Type_Basic, {Basic_u8,                BasicFlag_Integer | BasicFlag_Unsigned,     1, STR_LIT("u8")}},
+	{Type_Basic, {Basic_i16,               BasicFlag_Integer,                          2, STR_LIT("i16")}},
+	{Type_Basic, {Basic_u16,               BasicFlag_Integer | BasicFlag_Unsigned,     2, STR_LIT("u16")}},
+	{Type_Basic, {Basic_i32,               BasicFlag_Integer,                          4, STR_LIT("i32")}},
+	{Type_Basic, {Basic_u32,               BasicFlag_Integer | BasicFlag_Unsigned,     4, STR_LIT("u32")}},
+	{Type_Basic, {Basic_i64,               BasicFlag_Integer,                          8, STR_LIT("i64")}},
+	{Type_Basic, {Basic_u64,               BasicFlag_Integer | BasicFlag_Unsigned,     8, STR_LIT("u64")}},
+
+	{Type_Basic, {Basic_f32,               BasicFlag_Float,                            4, STR_LIT("f32")}},
+	{Type_Basic, {Basic_f64,               BasicFlag_Float,                            8, STR_LIT("f64")}},
+
+	{Type_Basic, {Basic_complex64,         BasicFlag_Complex,                          8, STR_LIT("complex64")}},
+	{Type_Basic, {Basic_complex128,        BasicFlag_Complex,                         16, STR_LIT("complex128")}},
+
+	{Type_Basic, {Basic_quaternion128,     BasicFlag_Quaternion,                      16, STR_LIT("quaternion128")}},
+	{Type_Basic, {Basic_quaternion256,     BasicFlag_Quaternion,                      32, STR_LIT("quaternion256")}},
+
+	{Type_Basic, {Basic_int,               BasicFlag_Integer,                         -1, STR_LIT("int")}},
+	{Type_Basic, {Basic_uint,              BasicFlag_Integer | BasicFlag_Unsigned,    -1, STR_LIT("uint")}},
+
+	{Type_Basic, {Basic_rawptr,            BasicFlag_Pointer,                         -1, STR_LIT("rawptr")}},
+	{Type_Basic, {Basic_string,            BasicFlag_String,                          -1, STR_LIT("string")}},
+	{Type_Basic, {Basic_any,               0,                                         -1, STR_LIT("any")}},
+
+	{Type_Basic, {Basic_UntypedBool,       BasicFlag_Boolean    | BasicFlag_Untyped,   0, STR_LIT("untyped bool")}},
+	{Type_Basic, {Basic_UntypedInteger,    BasicFlag_Integer    | BasicFlag_Untyped,   0, STR_LIT("untyped integer")}},
+	{Type_Basic, {Basic_UntypedFloat,      BasicFlag_Float      | BasicFlag_Untyped,   0, STR_LIT("untyped float")}},
+	{Type_Basic, {Basic_UntypedComplex,    BasicFlag_Complex    | BasicFlag_Untyped,   0, STR_LIT("untyped complex")}},
+	{Type_Basic, {Basic_UntypedQuaternion, BasicFlag_Quaternion | BasicFlag_Untyped,   0, STR_LIT("untyped quaternion")}},
+	{Type_Basic, {Basic_UntypedString,     BasicFlag_String     | BasicFlag_Untyped,   0, STR_LIT("untyped string")}},
+	{Type_Basic, {Basic_UntypedRune,       BasicFlag_Integer    | BasicFlag_Untyped,   0, STR_LIT("untyped rune")}},
+	{Type_Basic, {Basic_UntypedNil,        BasicFlag_Untyped,                          0, STR_LIT("untyped nil")}},
 };
 
 gb_global Type basic_type_aliases[] = {
@@ -255,6 +264,9 @@ gb_global Type *t_f64             = &basic_types[Basic_f64];
 gb_global Type *t_complex64       = &basic_types[Basic_complex64];
 gb_global Type *t_complex128      = &basic_types[Basic_complex128];
 
+gb_global Type *t_quaternion128   = &basic_types[Basic_quaternion128];
+gb_global Type *t_quaternion256   = &basic_types[Basic_quaternion256];
+
 gb_global Type *t_int             = &basic_types[Basic_int];
 gb_global Type *t_uint            = &basic_types[Basic_uint];
 
@@ -262,15 +274,16 @@ gb_global Type *t_rawptr          = &basic_types[Basic_rawptr];
 gb_global Type *t_string          = &basic_types[Basic_string];
 gb_global Type *t_any             = &basic_types[Basic_any];
 
-gb_global Type *t_untyped_bool    = &basic_types[Basic_UntypedBool];
-gb_global Type *t_untyped_integer = &basic_types[Basic_UntypedInteger];
-gb_global Type *t_untyped_float   = &basic_types[Basic_UntypedFloat];
-gb_global Type *t_untyped_complex = &basic_types[Basic_UntypedComplex];
-gb_global Type *t_untyped_string  = &basic_types[Basic_UntypedString];
-gb_global Type *t_untyped_rune    = &basic_types[Basic_UntypedRune];
-gb_global Type *t_untyped_nil     = &basic_types[Basic_UntypedNil];
-gb_global Type *t_byte            = &basic_type_aliases[0];
-gb_global Type *t_rune            = &basic_type_aliases[1];
+gb_global Type *t_untyped_bool       = &basic_types[Basic_UntypedBool];
+gb_global Type *t_untyped_integer    = &basic_types[Basic_UntypedInteger];
+gb_global Type *t_untyped_float      = &basic_types[Basic_UntypedFloat];
+gb_global Type *t_untyped_complex    = &basic_types[Basic_UntypedComplex];
+gb_global Type *t_untyped_quaternion = &basic_types[Basic_UntypedQuaternion];
+gb_global Type *t_untyped_string     = &basic_types[Basic_UntypedString];
+gb_global Type *t_untyped_rune       = &basic_types[Basic_UntypedRune];
+gb_global Type *t_untyped_nil        = &basic_types[Basic_UntypedNil];
+gb_global Type *t_byte               = &basic_type_aliases[0];
+gb_global Type *t_rune               = &basic_type_aliases[1];
 
 
 gb_global Type *t_u8_ptr  = NULL;
@@ -293,6 +306,7 @@ gb_global Type *t_type_info_named         = NULL;
 gb_global Type *t_type_info_integer       = NULL;
 gb_global Type *t_type_info_float         = NULL;
 gb_global Type *t_type_info_complex       = NULL;
+gb_global Type *t_type_info_quaternion    = NULL;
 gb_global Type *t_type_info_any           = NULL;
 gb_global Type *t_type_info_string        = NULL;
 gb_global Type *t_type_info_boolean       = NULL;
@@ -313,6 +327,7 @@ gb_global Type *t_type_info_named_ptr         = NULL;
 gb_global Type *t_type_info_integer_ptr       = NULL;
 gb_global Type *t_type_info_float_ptr         = NULL;
 gb_global Type *t_type_info_complex_ptr       = NULL;
+gb_global Type *t_type_info_quaternion_ptr    = NULL;
 gb_global Type *t_type_info_any_ptr           = NULL;
 gb_global Type *t_type_info_string_ptr        = NULL;
 gb_global Type *t_type_info_boolean_ptr       = NULL;
@@ -623,6 +638,13 @@ bool is_type_complex(Type *t) {
 	}
 	return false;
 }
+bool is_type_quaternion(Type *t) {
+	t = core_type(t);
+	if (t->kind == Type_Basic) {
+		return (t->Basic.flags & BasicFlag_Quaternion) != 0;
+	}
+	return false;
+}
 bool is_type_f32(Type *t) {
 	t = core_type(t);
 	if (t->kind == Type_Basic) {
@@ -715,6 +737,18 @@ Type *base_complex_elem_type(Type *t) {
 	GB_PANIC("Invalid complex type");
 	return t_invalid;
 }
+Type *base_quaternion_elem_type(Type *t) {
+	t = core_type(t);
+	if (is_type_quaternion(t)) {
+		switch (t->Basic.kind) {
+		case Basic_quaternion128:     return t_f32;
+		case Basic_quaternion256:     return t_f64;
+		case Basic_UntypedQuaternion: return t_untyped_float;
+		}
+	}
+	GB_PANIC("Invalid quaternion type");
+	return t_invalid;
+}
 
 
 bool is_type_struct(Type *t) {
@@ -971,12 +1005,13 @@ Type *default_type(Type *type) {
 	}
 	if (type->kind == Type_Basic) {
 		switch (type->Basic.kind) {
-		case Basic_UntypedBool:    return t_bool;
-		case Basic_UntypedInteger: return t_int;
-		case Basic_UntypedFloat:   return t_f64;
-		case Basic_UntypedComplex: return t_complex128;
-		case Basic_UntypedString:  return t_string;
-		case Basic_UntypedRune:    return t_rune;
+		case Basic_UntypedBool:       return t_bool;
+		case Basic_UntypedInteger:    return t_int;
+		case Basic_UntypedFloat:      return t_f64;
+		case Basic_UntypedComplex:    return t_complex128;
+		case Basic_UntypedQuaternion: return t_quaternion256;
+		case Basic_UntypedString:     return t_string;
+		case Basic_UntypedRune:       return t_rune;
 		}
 	}
 	return type;
@@ -1567,8 +1602,9 @@ i64 type_align_of_internal(gbAllocator allocator, Type *t, TypePath *path) {
 			return build_context.word_size;
 
 		case Basic_complex64: case Basic_complex128:
-			// complex{64,128} align as [2]f{32,64}
 			return type_size_of_internal(allocator, t, path) / 2;
+		case Basic_quaternion128: case Basic_quaternion256:
+			return type_size_of_internal(allocator, t, path) / 4;
 		}
 	} break;