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Speed up tm_predictor_8x8

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Left neighbor read from memory only once.
Speed up by ~20% in ./test_intra_pred_speed.

Change-Id: Ia1388630df6fed0dce9a6eeded6cb855bbc43505
This commit is contained in:
Jian Zhou 2015-11-19 18:57:36 -08:00
parent f3f6b6fe3e
commit f4621c5c8d
1 changed files with 17 additions and 19 deletions
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36
vpx_dsp/x86/intrapred_sse2.asm
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@ -545,33 +545,31 @@ cglobal tm_predictor_4x4, 4, 4, 5, dst, stride, above, left
RET
INIT_XMM sse2
cglobal tm_predictor_8x8, 4, 4, 4, dst, stride, above, left
cglobal tm_predictor_8x8, 4, 4, 5, dst, stride, above, left
pxor m1, m1
movd m2, [aboveq-1]
movq m0, [aboveq]
punpcklbw m2, m1
punpcklbw m0, m1
pshuflw m2, m2, 0x0
punpcklbw m0, m1 ; t1 t2 t3 t4 t5 t6 t7 t8 [word]
pshuflw m2, m2, 0x0 ; [63:0] tl tl tl tl [word]
DEFINE_ARGS dst, stride, line, left
mov lineq, -4
punpcklqdq m2, m2
add leftq, 8
psubw m0, m2
.loop:
movd m2, [leftq+lineq*2]
movd m3, [leftq+lineq*2+1]
punpcklbw m2, m1
punpcklbw m3, m1
pshuflw m2, m2, 0x0
pshuflw m3, m3, 0x0
punpcklqdq m2, m2
punpcklqdq m3, m3
paddw m2, m0
punpcklqdq m2, m2 ; tl tl tl tl tl tl tl tl [word]
psubw m0, m2 ; t1-tl t2-tl ... t8-tl [word]
movq m2, [leftq]
punpcklbw m2, m1 ; l1 l2 l3 l4 l5 l6 l7 l8 [word]
.loop
pshuflw m4, m2, 0x0 ; [63:0] l1 l1 l1 l1 [word]
pshuflw m3, m2, 0x55 ; [63:0] l2 l2 l2 l2 [word]
punpcklqdq m4, m4 ; l1 l1 l1 l1 l1 l1 l1 l1 [word]
punpcklqdq m3, m3 ; l2 l2 l2 l2 l2 l2 l2 l2 [word]
paddw m4, m0
paddw m3, m0
packuswb m2, m3
movq [dstq ], m2
movhps [dstq+strideq], m2
packuswb m4, m3
movq [dstq ], m4
movhps [dstq+strideq], m4
lea dstq, [dstq+strideq*2]
psrldq m2, 4
inc lineq
jnz .loop
REP_RET