[x265] [PATCH Review only] asm: pixel_add_pp routine for block sizes 8x8, 8x16 and 8x32

[murugan at multicorewareinc.com]

# HG changeset patch
# User Murugan Vairavel <murugan at multicorewareinc.com>
# Date 1383653659 -19800
#      Tue Nov 05 17:44:19 2013 +0530
# Node ID d9505240b748ffe5ce523905097f0d53a9ff7943
# Parent  264f215c3503097b8ec4cebfaade85caaa540048
asm: pixel_add_pp routine for block sizes 8x8, 8x16 and 8x32

diff -r 264f215c3503 -r d9505240b748 source/common/x86/pixel-add8.asm
--- a/source/common/x86/pixel-add8.asm	Tue Nov 05 17:39:46 2013 +0530
+++ b/source/common/x86/pixel-add8.asm	Tue Nov 05 17:44:19 2013 +0530
@@ -127,3 +127,58 @@
 %endmacro
 
 PIXELADD_PP_W8_H2 8, 6
+
+;-----------------------------------------------------------------------------
+; void pixel_add_pp_c_%1x%2(pixel *dest, intptr_t destride, pixel *src0, pixel *src1, intptr_t srcstride0, intptr_t srcstride1);
+;-----------------------------------------------------------------------------
+%macro PIXELADD_PP_W8_H4 2
+INIT_XMM sse2
+cglobal pixel_add_pp_%1x%2, 4, 7, 8, dest, deststride, src0, src1
+
+mov    r4d,    r4m
+mov    r5d,    r5m
+mov    r6d,    %2
+
+.loop
+
+    movh       m0,     [r2]
+    movh       m1,     [r3]
+
+    movh       m2,     [r2 + r4]
+    movh       m3,     [r3 + r5] 
+
+    movh       m4,     [r2 + 2 * r4]
+    movh       m5,     [r3 + 2 * r5]
+
+    lea        r2,     [r2 + 2 * r4]
+    lea        r3,     [r3 + 2 * r5]
+
+    movh       m6,     [r2 +  r4]
+    movh       m7,     [r3 +  r5]
+
+    paddusb    m0,     m1
+    paddusb    m2,     m3
+    paddusb    m4,     m5
+    paddusb    m6,     m7
+
+    movh    [r0],             m0
+    movh    [r0 + r1],        m2
+    movh    [r0 + 2 * r1],    m4
+
+    lea     r0,               [r0 + 2 * r1]
+    movh    [r0 + r1],        m6
+
+    lea     r2,               [r2 + 2 * r4]
+    lea     r3,               [r3 + 2 * r5]
+    lea     r0,               [r0 + 2 * r1]
+
+    sub     r6d,              4
+
+jnz    .loop
+
+RET
+%endmacro
+
+PIXELADD_PP_W8_H4 8, 8
+PIXELADD_PP_W8_H4 8, 16
+PIXELADD_PP_W8_H4 8, 32