Add pclmulqdq.odin

core/simd/x86/pclmulqdq.odin

@@ -0,0 +1,13 @@
+//+build i386, amd64
+package simd_x86
+
+_mm_clmulepi64_si128 :: #force_inline proc "c" (a, b: __m128i, $IMM8: u8) -> __m128i {
+	return pclmulqdq(a, b, u8(IMM8))
+}
+
+@(default_calling_convention="c")
+@(private)
+foreign _ {
+	@(link_name="llvm.x86.pclmulqdq")
+	pclmulqdq :: proc(a, round_key: __m128i, #const imm8: u8) -> __m128i ---
+}