[x265] [PATCH] arm: Implement blockfill_s_neon ARM NEON

[chen]

At 2016-03-01 16:50:49,radhakrishnan at multicorewareinc.com wrote:
># HG changeset patch
># User Radhakrishnan VR <radhakrishnan at multicorewareinc.com>
># Date 1456814898 -19800
>#      Tue Mar 01 12:18:18 2016 +0530
># Node ID 79c00b9bc2b81afef2e41526fc3c390528f3174c
># Parent  291beccb67606494a9a144ca2cc4411ab3e21e50
>arm: Implement blockfill_s_neon ARM NEON
>
>diff -r 291beccb6760 -r 79c00b9bc2b8 source/common/arm/asm-primitives.cpp
>--- a/source/common/arm/asm-primitives.cpp	Fri Feb 26 16:23:56 2016 +0530
>+++ b/source/common/arm/asm-primitives.cpp	Tue Mar 01 12:18:18 2016 +0530
>@@ -42,6 +42,12 @@
> {
>     if (cpuMask & X265_CPU_NEON)
>     {
>+        // Block_fill
>+        p.cu[BLOCK_4x4].blockfill_s   = PFX(blockfill_s_4x4_neon);
>+        p.cu[BLOCK_8x8].blockfill_s   = PFX(blockfill_s_8x8_neon);
>+        p.cu[BLOCK_16x16].blockfill_s = PFX(blockfill_s_16x16_neon);
>+        p.cu[BLOCK_32x32].blockfill_s = PFX(blockfill_s_32x32_neon);
>+
>         // Blockcopy_ss
>         p.cu[BLOCK_4x4].copy_ss   = PFX(blockcopy_ss_4x4_neon);
>         p.cu[BLOCK_8x8].copy_ss   = PFX(blockcopy_ss_8x8_neon);
>diff -r 291beccb6760 -r 79c00b9bc2b8 source/common/arm/blockcopy8.S
>--- a/source/common/arm/blockcopy8.S	Fri Feb 26 16:23:56 2016 +0530
>+++ b/source/common/arm/blockcopy8.S	Tue Mar 01 12:18:18 2016 +0530
>@@ -311,3 +311,52 @@
>     bne             loop_css64
>     bx              lr
> endfunc
>+
>+// void x265_blockfill_s_neon(int16_t* dst, intptr_t dstride, int16_t val)
>+function x265_blockfill_s_4x4_neon
>+    lsl             r1, #1
>+.rept 2
>+    vdup.u16        d0, r2
>+    vdup.u16        d1, r2

d0 == d1 == r2, why load duplicated value in every loop (.rept)

>+    vst1.16         {d0}, [r0], r1
>+    vst1.16         {d1}, [r0], r1
>+.endr
>+    bx              lr
>+endfunc
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