virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-11-23 21:54:53 +02:00
Code Issues Releases Activity

avcodec/x86/mpegvideoenc_template: Avoid touching nonvolatile register

Browse Source 
xmm7 is nonvolatile on x64 Windows.

Reviewed-by: Lynne <dev@lynne.ee>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2025-11-15 19:56:23 +01:00
parent aeb138679a
commit b890cd0f73
1 changed files with 8 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
libavcodec/x86/mpegvideoenc_template.c
View File

@@ -117,7 +117,7 @@ static int RENAME(dct_quantize)(MPVEncContext *const s,
__asm__ volatile(
"movd %%"FF_REG_a", %%xmm3 \n\t" // last_non_zero_p1
SPREADW("%%xmm3")
"pxor %%xmm7, %%xmm7 \n\t" // 0
"pxor %%xmm2, %%xmm2 \n\t" // 0
"pxor %%xmm4, %%xmm4 \n\t" // 0
"movdqa (%2), %%xmm5 \n\t" // qmat[0]
"pxor %%xmm6, %%xmm6 \n\t"
@@ -132,9 +132,9 @@ static int RENAME(dct_quantize)(MPVEncContext *const s,
"por %%xmm0, %%xmm4 \n\t"
RESTORE_SIGN("%%xmm1", "%%xmm0") // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
"movdqa %%xmm0, (%5, %%"FF_REG_a") \n\t"
"pcmpeqw %%xmm7, %%xmm0 \n\t" // out==0 ? 0xFF : 0x00
"pcmpeqw %%xmm2, %%xmm0 \n\t" // out==0 ? 0xFF : 0x00
"movdqa (%4, %%"FF_REG_a"), %%xmm1 \n\t"
"movdqa %%xmm7, (%1, %%"FF_REG_a") \n\t" // 0
"movdqa %%xmm2, (%1, %%"FF_REG_a") \n\t" // 0
"pandn %%xmm1, %%xmm0 \n\t"
"pmaxsw %%xmm0, %%xmm3 \n\t"
"add $16, %%"FF_REG_a" \n\t"
@@ -146,13 +146,13 @@ static int RENAME(dct_quantize)(MPVEncContext *const s,
: "r" (block+64), "r" (qmat), "r" (bias),
"r" (inv_zigzag_direct16 + 64), "r" (temp_block + 64)
XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
"%xmm4", "%xmm5", "%xmm6", "%xmm7")
"%xmm4", "%xmm5", "%xmm6")
);
}else{ // FMT_H263
__asm__ volatile(
"movd %%"FF_REG_a", %%xmm3 \n\t" // last_non_zero_p1
SPREADW("%%xmm3")
"pxor %%xmm7, %%xmm7 \n\t" // 0
"pxor %%xmm2, %%xmm2 \n\t" // 0
"pxor %%xmm4, %%xmm4 \n\t" // 0
"mov $-128, %%"FF_REG_a" \n\t"
".p2align 4 \n\t"
@@ -166,9 +166,9 @@ static int RENAME(dct_quantize)(MPVEncContext *const s,
"por %%xmm0, %%xmm4 \n\t"
RESTORE_SIGN("%%xmm1", "%%xmm0") // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
"movdqa %%xmm0, (%5, %%"FF_REG_a") \n\t"
"pcmpeqw %%xmm7, %%xmm0 \n\t" // out==0 ? 0xFF : 0x00
"pcmpeqw %%xmm2, %%xmm0 \n\t" // out==0 ? 0xFF : 0x00
"movdqa (%4, %%"FF_REG_a"), %%xmm1 \n\t"
"movdqa %%xmm7, (%1, %%"FF_REG_a") \n\t" // 0
"movdqa %%xmm2, (%1, %%"FF_REG_a") \n\t" // 0
"pandn %%xmm1, %%xmm0 \n\t"
"pmaxsw %%xmm0, %%xmm3 \n\t"
"add $16, %%"FF_REG_a" \n\t"
@@ -180,7 +180,7 @@ static int RENAME(dct_quantize)(MPVEncContext *const s,
: "r" (block+64), "r" (qmat+64), "r" (bias+64),
"r" (inv_zigzag_direct16 + 64), "r" (temp_block + 64)
XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
"%xmm4", "%xmm5", "%xmm6", "%xmm7")
"%xmm4", "%xmm5", "%xmm6")
);
}
__asm__ volatile(