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avcodec/x86/mpegvideo: Port dct_unquantize_mpeg2_inter_mmx to SSSE3

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Benefits from wider registers, pabsw and psignw.

Benchmarks:
dct_unquantize_mpeg2_inter_c:                          131.2 ( 1.00x)
dct_unquantize_mpeg2_inter_mmx:                         50.2 ( 2.62x)
dct_unquantize_mpeg2_inter_ssse3:                       20.5 ( 6.38x)

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2025-11-04 06:45:12 +01:00
parent 60084b1369
commit 6e2153111d
1 changed files with 49 additions and 60 deletions
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109
libavcodec/x86/mpegvideo.c
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@@ -305,8 +305,10 @@ __asm__ volatile(
//Note, we do not do mismatch control for intra as errors cannot accumulate
}
static void dct_unquantize_mpeg2_inter_mmx(const MPVContext *s,
int16_t *block, int n, int qscale)
#if HAVE_SSSE3_INLINE
static void dct_unquantize_mpeg2_inter_ssse3(const MPVContext *s,
int16_t *block, int n, int qscale)
{
av_assert2(s->block_last_index[n]>=0);
@@ -316,72 +318,59 @@ static void dct_unquantize_mpeg2_inter_mmx(const MPVContext *s,
__asm__ volatile(
"movd %k1, %%mm6 \n\t"
"movd %k1, %%xmm6 \n\t"
"lea (%2, %0), %1 \n\t"
"neg %0 \n\t"
"pcmpeqw %%mm7, %%mm7 \n\t"
"psrlq $48, %%mm7 \n\t"
"packssdw %%mm6, %%mm6 \n\t"
"packssdw %%mm6, %%mm6 \n\t"
".p2align 4 \n\t"
"1: \n\t"
"movq (%1, %0), %%mm0 \n\t"
"movq 8(%1, %0), %%mm1 \n\t"
"movq (%3, %0), %%mm4 \n\t"
"movq 8(%3, %0), %%mm5 \n\t"
"pmullw %%mm6, %%mm4 \n\t" // q=qscale*quant_matrix[i]
"pmullw %%mm6, %%mm5 \n\t" // q=qscale*quant_matrix[i]
"pxor %%mm2, %%mm2 \n\t"
"pxor %%mm3, %%mm3 \n\t"
"pcmpgtw %%mm0, %%mm2 \n\t" // block[i] < 0 ? -1 : 0
"pcmpgtw %%mm1, %%mm3 \n\t" // block[i] < 0 ? -1 : 0
"pxor %%mm2, %%mm0 \n\t"
"pxor %%mm3, %%mm1 \n\t"
"psubw %%mm2, %%mm0 \n\t" // abs(block[i])
"psubw %%mm3, %%mm1 \n\t" // abs(block[i])
"paddw %%mm0, %%mm0 \n\t" // abs(block[i])*2
"paddw %%mm1, %%mm1 \n\t" // abs(block[i])*2
"pmullw %%mm4, %%mm0 \n\t" // abs(block[i])*2*q
"pmullw %%mm5, %%mm1 \n\t" // abs(block[i])*2*q
"paddw %%mm4, %%mm0 \n\t" // (abs(block[i])*2 + 1)*q
"paddw %%mm5, %%mm1 \n\t" // (abs(block[i])*2 + 1)*q
"pxor %%mm4, %%mm4 \n\t"
"pxor %%mm5, %%mm5 \n\t" // FIXME slow
"pcmpeqw (%1, %0), %%mm4 \n\t" // block[i] == 0 ? -1 : 0
"pcmpeqw 8(%1, %0), %%mm5 \n\t" // block[i] == 0 ? -1 : 0
"psrlw $5, %%mm0 \n\t"
"psrlw $5, %%mm1 \n\t"
"pxor %%mm2, %%mm0 \n\t"
"pxor %%mm3, %%mm1 \n\t"
"psubw %%mm2, %%mm0 \n\t"
"psubw %%mm3, %%mm1 \n\t"
"pandn %%mm0, %%mm4 \n\t"
"pandn %%mm1, %%mm5 \n\t"
"pxor %%mm4, %%mm7 \n\t"
"pxor %%mm5, %%mm7 \n\t"
"movq %%mm4, (%1, %0) \n\t"
"movq %%mm5, 8(%1, %0) \n\t"
SPLATW(xmm6)
"pcmpeqw %%xmm7, %%xmm7 \n\t"
"psrldq $14, %%xmm7 \n\t"
".p2align 4 \n\t"
"1: \n\t"
"movdqa (%3, %0), %%xmm4 \n\t"
"movdqa 16(%3, %0), %%xmm5 \n\t"
"movdqa (%1, %0), %%xmm0 \n\t"
"movdqa 16(%1, %0), %%xmm1 \n\t"
"pmullw %%xmm6, %%xmm4 \n\t" // q=qscale*quant_matrix[i]
"pmullw %%xmm6, %%xmm5 \n\t" // q=qscale*quant_matrix[i]
"pabsw %%xmm0, %%xmm2 \n\t" // abs(block[i])
"pabsw %%xmm1, %%xmm3 \n\t" // abs(block[i])
"paddw %%xmm2, %%xmm2 \n\t" // abs(block[i])*2
"paddw %%xmm3, %%xmm3 \n\t" // abs(block[i])*2
"pmullw %%xmm4, %%xmm2 \n\t" // abs(block[i])*2*q
"pmullw %%xmm5, %%xmm3 \n\t" // abs(block[i])*2*q
"paddw %%xmm4, %%xmm2 \n\t" // (abs(block[i])*2 + 1)*q
"paddw %%xmm5, %%xmm3 \n\t" // (abs(block[i])*2 + 1)*q
"psrlw $5, %%xmm2 \n\t"
"psrlw $5, %%xmm3 \n\t"
"psignw %%xmm0, %%xmm2 \n\t"
"psignw %%xmm1, %%xmm3 \n\t"
"movdqa %%xmm2, (%1, %0) \n\t"
"movdqa %%xmm3, 16(%1, %0) \n\t"
"pxor %%xmm2, %%xmm7 \n\t"
"pxor %%xmm3, %%xmm7 \n\t"
"add $16, %0 \n\t"
"jng 1b \n\t"
"movd 124(%2), %%mm0 \n\t"
"movq %%mm7, %%mm6 \n\t"
"psrlq $32, %%mm7 \n\t"
"pxor %%mm6, %%mm7 \n\t"
"movq %%mm7, %%mm6 \n\t"
"psrlq $16, %%mm7 \n\t"
"pxor %%mm6, %%mm7 \n\t"
"pslld $31, %%mm7 \n\t"
"psrlq $15, %%mm7 \n\t"
"pxor %%mm7, %%mm0 \n\t"
"movd %%mm0, 124(%2) \n\t"
"add $32, %0 \n\t"
"jng 1b \n\t"
"movd 124(%2), %%xmm0 \n\t"
"movhlps %%xmm7, %%xmm6 \n\t"
"pxor %%xmm6, %%xmm7 \n\t"
"pshufd $1, %%xmm7, %%xmm6 \n\t"
"pxor %%xmm6, %%xmm7 \n\t"
"pshuflw $1, %%xmm7, %%xmm6 \n\t"
"pxor %%xmm6, %%xmm7 \n\t"
"pslld $31, %%xmm7 \n\t"
"psrld $15, %%xmm7 \n\t"
"pxor %%xmm7, %%xmm0 \n\t"
"movd %%xmm0, 124(%2) \n\t"
: "+r"(offset), "+r" (qscale2)
: "r" (block), "r"(quant_matrix)
: "memory"
: XMM_CLOBBERS("%xmm0", "%xmm1", "%xmm2", "%xmm3", "%xmm4", "%xmm5", "%xmm6", "%xmm7",)
"memory"
);
}
#endif /* HAVE_SSSE3_INLINE */
#endif /* HAVE_MMX_INLINE */
av_cold void ff_mpv_unquantize_init_x86(MPVUnquantDSPContext *s, int bitexact)
@@ -392,7 +381,6 @@ av_cold void ff_mpv_unquantize_init_x86(MPVUnquantDSPContext *s, int bitexact)
if (INLINE_MMX(cpu_flags)) {
if (!bitexact)
s->dct_unquantize_mpeg2_intra = dct_unquantize_mpeg2_intra_mmx;
s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_mmx;
}
#if HAVE_SSSE3_INLINE
if (INLINE_SSSE3(cpu_flags)) {
@@ -400,6 +388,7 @@ av_cold void ff_mpv_unquantize_init_x86(MPVUnquantDSPContext *s, int bitexact)
s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_ssse3;
s->dct_unquantize_mpeg1_intra = dct_unquantize_mpeg1_intra_ssse3;
s->dct_unquantize_mpeg1_inter = dct_unquantize_mpeg1_inter_ssse3;
s->dct_unquantize_mpeg2_inter = dct_unquantize_mpeg2_inter_ssse3;
}
#endif /* HAVE_SSSE3_INLINE */
#endif /* HAVE_MMX_INLINE */