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cpu: Removed 3DNow! support and SDL_Has3DNow().

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Reference Issue #6636.
This commit is contained in:
Ryan C. Gordon
2022-12-22 01:24:59 -05:00
committed by Sam Lantinga
parent 0187209f46
commit 1cf2b566af
13 changed files with 20 additions and 206 deletions
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3
src/video/SDL_blit.c
View File

@@ -141,9 +141,6 @@ static SDL_BlitFunc SDL_ChooseBlitFunc(Uint32 src_format, Uint32 dst_format, int
if (SDL_HasMMX()) {
features |= SDL_CPU_MMX;
}
if (SDL_Has3DNow()) {
features |= SDL_CPU_3DNOW;
}
if (SDL_HasSSE()) {
features |= SDL_CPU_SSE;
}

9
src/video/SDL_blit.h
View File

@@ -49,11 +49,10 @@ extern Uint8 *SDL_expand_byte[9];
/* SDL blit CPU flags */
#define SDL_CPU_ANY 0x00000000
#define SDL_CPU_MMX 0x00000001
#define SDL_CPU_3DNOW 0x00000002
#define SDL_CPU_SSE 0x00000004
#define SDL_CPU_SSE2 0x00000008
#define SDL_CPU_ALTIVEC_PREFETCH 0x00000010
#define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000020
#define SDL_CPU_SSE 0x00000002
#define SDL_CPU_SSE2 0x00000004
#define SDL_CPU_ALTIVEC_PREFETCH 0x00000008
#define SDL_CPU_ALTIVEC_NOPREFETCH 0x00000010
typedef struct
{

81
src/video/SDL_blit_A.c
View File

@@ -614,78 +614,6 @@ static void BlitRGBtoBGRPixelAlpha(SDL_BlitInfo *info)
}
}
#ifdef __3dNOW__
/* fast (as in MMX with prefetch) ARGB888->(A)RGB888 blending with pixel alpha */
static void BlitRGBtoRGBPixelAlphaMMX3DNOW(SDL_BlitInfo *info)
{
int width = info->dst_w;
int height = info->dst_h;
Uint32 *srcp = (Uint32 *)info->src;
int srcskip = info->src_skip >> 2;
Uint32 *dstp = (Uint32 *)info->dst;
int dstskip = info->dst_skip >> 2;
SDL_PixelFormat *sf = info->src_fmt;
Uint32 amask = sf->Amask;
Uint32 ashift = sf->Ashift;
Uint64 multmask, multmask2;
__m64 src1, dst1, mm_alpha, mm_zero, mm_alpha2;
mm_zero = _mm_setzero_si64(); /* 0 -> mm_zero */
multmask = 0x00FF;
multmask <<= (ashift * 2);
multmask2 = 0x00FF00FF00FF00FFULL;
while (height--) {
/* *INDENT-OFF* */ /* clang-format off */
DUFFS_LOOP4({
Uint32 alpha;
_m_prefetch(srcp + 16);
_m_prefetch(dstp + 16);
alpha = *srcp & amask;
if (alpha == 0) {
/* do nothing */
} else if (alpha == amask) {
*dstp = *srcp;
} else {
src1 = _mm_cvtsi32_si64(*srcp); /* src(ARGB) -> src1 (0000ARGB) */
src1 = _mm_unpacklo_pi8(src1, mm_zero); /* 0A0R0G0B -> src1 */
dst1 = _mm_cvtsi32_si64(*dstp); /* dst(ARGB) -> dst1 (0000ARGB) */
dst1 = _mm_unpacklo_pi8(dst1, mm_zero); /* 0A0R0G0B -> dst1 */
mm_alpha = _mm_cvtsi32_si64(alpha); /* alpha -> mm_alpha (0000000A) */
mm_alpha = _mm_srli_si64(mm_alpha, ashift); /* mm_alpha >> ashift -> mm_alpha(0000000A) */
mm_alpha = _mm_unpacklo_pi16(mm_alpha, mm_alpha); /* 00000A0A -> mm_alpha */
mm_alpha2 = _mm_unpacklo_pi32(mm_alpha, mm_alpha); /* 0A0A0A0A -> mm_alpha2 */
mm_alpha = _mm_or_si64(mm_alpha2, *(__m64 *) & multmask); /* 0F0A0A0A -> mm_alpha */
mm_alpha2 = _mm_xor_si64(mm_alpha2, *(__m64 *) & multmask2); /* 255 - mm_alpha -> mm_alpha */
/* blend */
src1 = _mm_mullo_pi16(src1, mm_alpha);
src1 = _mm_srli_pi16(src1, 8);
dst1 = _mm_mullo_pi16(dst1, mm_alpha2);
dst1 = _mm_srli_pi16(dst1, 8);
dst1 = _mm_add_pi16(src1, dst1);
dst1 = _mm_packs_pu16(dst1, mm_zero);
*dstp = _mm_cvtsi64_si32(dst1); /* dst1 -> pixel */
}
++srcp;
++dstp;
}, width);
/* *INDENT-ON* */ /* clang-format on */
srcp += srcskip;
dstp += dstskip;
}
_mm_empty();
}
#endif /* __3dNOW__ */
/* 16bpp special case for per-surface alpha=50%: blend 2 pixels in parallel */
/* blend a single 16 bit pixel at 50% */
@@ -1401,20 +1329,15 @@ SDL_CalculateBlitA(SDL_Surface *surface)
case 4:
if (sf->Rmask == df->Rmask && sf->Gmask == df->Gmask && sf->Bmask == df->Bmask && sf->BytesPerPixel == 4) {
#if defined(__MMX__) || defined(__3dNOW__)
#if defined(__MMX__)
if (sf->Rshift % 8 == 0 && sf->Gshift % 8 == 0 && sf->Bshift % 8 == 0 && sf->Ashift % 8 == 0 && sf->Aloss == 0) {
#ifdef __3dNOW__
if (SDL_Has3DNow()) {
return BlitRGBtoRGBPixelAlphaMMX3DNOW;
}
#endif
#ifdef __MMX__
if (SDL_HasMMX()) {
return BlitRGBtoRGBPixelAlphaMMX;
}
#endif
}
#endif /* __MMX__ || __3dNOW__ */
#endif /* __MMX__ */
if (sf->Amask == 0xff000000) {
#if SDL_ARM_NEON_BLITTERS
if (SDL_HasNEON()) {