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avcodec/x86/mpegvideoenc: Reduce number of registers used

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Avoids a push+pop 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 16:46:18 +01:00
parent 503afa40f7
commit 2cfef7031c
1 changed files with 9 additions and 9 deletions
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18
libavcodec/x86/mpegvideoenc.c
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@@ -68,7 +68,7 @@ static void denoise_dct_sse2(MPVEncContext *const s, int16_t block[])
s->dct_count[intra]++;
__asm__ volatile(
"pxor %%xmm7, %%xmm7 \n\t"
"pxor %%xmm6, %%xmm6 \n\t"
"1: \n\t"
"pxor %%xmm0, %%xmm0 \n\t"
"pxor %%xmm1, %%xmm1 \n\t"
@@ -90,18 +90,18 @@ static void denoise_dct_sse2(MPVEncContext *const s, int16_t block[])
"psubw %%xmm1, %%xmm3 \n\t"
"movdqa %%xmm2, (%0) \n\t"
"movdqa %%xmm3, 16(%0) \n\t"
"movdqa %%xmm4, %%xmm6 \n\t"
"movdqa %%xmm4, %%xmm2 \n\t"
"movdqa %%xmm5, %%xmm0 \n\t"
"punpcklwd %%xmm7, %%xmm4 \n\t"
"punpckhwd %%xmm7, %%xmm6 \n\t"
"punpcklwd %%xmm7, %%xmm5 \n\t"
"punpckhwd %%xmm7, %%xmm0 \n\t"
"punpcklwd %%xmm6, %%xmm4 \n\t"
"punpckhwd %%xmm6, %%xmm2 \n\t"
"punpcklwd %%xmm6, %%xmm5 \n\t"
"punpckhwd %%xmm6, %%xmm0 \n\t"
"paddd (%1), %%xmm4 \n\t"
"paddd 16(%1), %%xmm6 \n\t"
"paddd 16(%1), %%xmm2 \n\t"
"paddd 32(%1), %%xmm5 \n\t"
"paddd 48(%1), %%xmm0 \n\t"
"movdqa %%xmm4, (%1) \n\t"
"movdqa %%xmm6, 16(%1) \n\t"
"movdqa %%xmm2, 16(%1) \n\t"
"movdqa %%xmm5, 32(%1) \n\t"
"movdqa %%xmm0, 48(%1) \n\t"
"add $32, %0 \n\t"
@@ -112,7 +112,7 @@ static void denoise_dct_sse2(MPVEncContext *const s, int16_t block[])
: "+r" (block), "+r" (sum), "+r" (offset)
: "r"(block+64)
XMM_CLOBBERS_ONLY("%xmm0", "%xmm1", "%xmm2", "%xmm3",
"%xmm4", "%xmm5", "%xmm6", "%xmm7")
"%xmm4", "%xmm5", "%xmm6")
);
}
#endif /* HAVE_SSE2_INLINE */