ref: f4621c5c8d733cfd47d0396e7e50677857998770
parent: f3f6b6fe3e960959489db2568d9942aeca261daa
author: Jian Zhou <zhoujian@google.com>
date: Thu Nov 19 13:57:36 EST 2015
Speed up tm_predictor_8x8 Left neighbor read from memory only once. Speed up by ~20% in ./test_intra_pred_speed. Change-Id: Ia1388630df6fed0dce9a6eeded6cb855bbc43505
--- a/vpx_dsp/x86/intrapred_sse2.asm
+++ b/vpx_dsp/x86/intrapred_sse2.asm
@@ -545,33 +545,31 @@
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