godot/thirdparty/astcenc/patches/fix-build-no-ssse3.patch

From 02c22d3df501dc284ba732fa82a6c408c57b3237 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?R=C3=A9mi=20Verschelde?= <[email protected]>
Date: Thu, 19 Jan 2023 23:30:13 +0100
Subject: [PATCH] mathlib: Remove incomplete support for SSE3 which assumed
 SSSE3

`_mm_shuffle_epi8` requires SSSE3 so the check on `ASTCENC_SSE >= 30` is
too lax and would fail if `__SSE3__` is supported, but not `__SSSE3__`.

The only supported configurations are SSE2, SSE4.1, and AVX2, so as
discussed in #393 we drop the SSE3 checks and require SSE4.1 instead.
---
 Source/astcenc_mathlib.h          |  2 --
 Source/astcenc_vecmathlib_sse_4.h | 10 +++++-----
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/Source/astcenc_mathlib.h b/Source/astcenc_mathlib.h
index 67e989e..0540c4f 100644
--- a/Source/astcenc_mathlib.h
+++ b/Source/astcenc_mathlib.h
@@ -48,8 +48,6 @@
     #define ASTCENC_SSE 42
   #elif defined(__SSE4_1__)
     #define ASTCENC_SSE 41
-  #elif defined(__SSE3__)
-    #define ASTCENC_SSE 30
   #elif defined(__SSE2__)
     #define ASTCENC_SSE 20
   #else
diff --git a/Source/astcenc_vecmathlib_sse_4.h b/Source/astcenc_vecmathlib_sse_4.h
index 76fe577..26dcc4a 100644
--- a/Source/astcenc_vecmathlib_sse_4.h
+++ b/Source/astcenc_vecmathlib_sse_4.h
@@ -1046,7 +1046,7 @@ ASTCENC_SIMD_INLINE void vtable_prepare(vint4 t0, vint4& t0p)
  */
 ASTCENC_SIMD_INLINE void vtable_prepare(vint4 t0, vint4 t1, vint4& t0p, vint4& t1p)
 {
-#if ASTCENC_SSE >= 30
+#if ASTCENC_SSE >= 41
 	t0p = t0;
 	t1p = t0 ^ t1;
 #else
@@ -1062,7 +1062,7 @@ ASTCENC_SIMD_INLINE void vtable_prepare(
 	vint4 t0, vint4 t1, vint4 t2, vint4 t3,
 	vint4& t0p, vint4& t1p, vint4& t2p, vint4& t3p)
 {
-#if ASTCENC_SSE >= 30
+#if ASTCENC_SSE >= 41
 	t0p = t0;
 	t1p = t0 ^ t1;
 	t2p = t1 ^ t2;
@@ -1080,7 +1080,7 @@ ASTCENC_SIMD_INLINE void vtable_prepare(
  */
 ASTCENC_SIMD_INLINE vint4 vtable_8bt_32bi(vint4 t0, vint4 idx)
 {
-#if ASTCENC_SSE >= 30
+#if ASTCENC_SSE >= 41
 	// Set index byte MSB to 1 for unused bytes so shuffle returns zero
 	__m128i idxx = _mm_or_si128(idx.m, _mm_set1_epi32(static_cast<int>(0xFFFFFF00)));
 
@@ -1102,7 +1102,7 @@ ASTCENC_SIMD_INLINE vint4 vtable_8bt_32bi(vint4 t0, vint4 idx)
  */
 ASTCENC_SIMD_INLINE vint4 vtable_8bt_32bi(vint4 t0, vint4 t1, vint4 idx)
 {
-#if ASTCENC_SSE >= 30
+#if ASTCENC_SSE >= 41
 	// Set index byte MSB to 1 for unused bytes so shuffle returns zero
 	__m128i idxx = _mm_or_si128(idx.m, _mm_set1_epi32(static_cast<int>(0xFFFFFF00)));
 
@@ -1130,7 +1130,7 @@ ASTCENC_SIMD_INLINE vint4 vtable_8bt_32bi(vint4 t0, vint4 t1, vint4 idx)
  */
 ASTCENC_SIMD_INLINE vint4 vtable_8bt_32bi(vint4 t0, vint4 t1, vint4 t2, vint4 t3, vint4 idx)
 {
-#if ASTCENC_SSE >= 30
+#if ASTCENC_SSE >= 41
 	// Set index byte MSB to 1 for unused bytes so shuffle returns zero
 	__m128i idxx = _mm_or_si128(idx.m, _mm_set1_epi32(static_cast<int>(0xFFFFFF00)));
 
-- 
2.39.1