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For rounding in chroma MC SSSE3, use 16-byte pw_3/4 instead of reading 8 bytes

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and then using movlhps to dup it into the higher half of the register.

Originally committed as revision 26086 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Ronald S. Bultje 2010-12-24 17:23:22 +00:00
parent 95ee581a95
commit 8d147f1f60
3 changed files with 4 additions and 6 deletions
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2
libavcodec/x86/dsputil_mmx.c
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@ -41,7 +41,7 @@ DECLARE_ALIGNED(8, const uint64_t, ff_wtwo) = 0x0002000200020002ULL;
DECLARE_ALIGNED(16, const uint64_t, ff_pdw_80000000)[2] =
{0x8000000080000000ULL, 0x8000000080000000ULL};
DECLARE_ALIGNED(8, const uint64_t, ff_pw_3 ) = 0x0003000300030003ULL;
DECLARE_ALIGNED(8, const xmm_reg, ff_pw_3 ) = {0x0003000300030003ULL, 0x0003000300030003ULL};
DECLARE_ALIGNED(16, const xmm_reg, ff_pw_4 ) = {0x0004000400040004ULL, 0x0004000400040004ULL};
DECLARE_ALIGNED(16, const xmm_reg, ff_pw_5 ) = {0x0005000500050005ULL, 0x0005000500050005ULL};
DECLARE_ALIGNED(16, const xmm_reg, ff_pw_8 ) = {0x0008000800080008ULL, 0x0008000800080008ULL};

2
libavcodec/x86/dsputil_mmx.h
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@ -32,7 +32,7 @@ extern const uint64_t ff_wtwo;
extern const uint64_t ff_pdw_80000000[2];
extern const uint64_t ff_pw_3;
extern const xmm_reg ff_pw_3;
extern const xmm_reg ff_pw_4;
extern const xmm_reg ff_pw_5;
extern const xmm_reg ff_pw_8;

6
libavcodec/x86/h264_chromamc.asm
View File

@ -530,9 +530,8 @@ cglobal %1_%2_chroma_mc8_%3, 6, 7, 8
add r4, 8
sub r4, r5 ; 255*x+8 = x<<8 | (8-x)
movd m7, r4d
movq m6, [rnd_1d_%2]
movdqa m6, [rnd_1d_%2]
pshuflw m7, m7, 0
movlhps m6, m6
movlhps m7, m7
.next2xrows
@ -568,9 +567,8 @@ cglobal %1_%2_chroma_mc8_%3, 6, 7, 8
add r5, 8
sub r5, r4 ; 255*y+8 = y<<8 | (8-y)
movd m7, r5d
movq m6, [rnd_1d_%2]
movdqa m6, [rnd_1d_%2]
pshuflw m7, m7, 0
movlhps m6, m6
movlhps m7, m7
.next2yrows