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libyuv
Commit 4e439631 authored by zhongwei.yao@arm.com's avatar zhongwei.yao@arm.com
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Add function ScaleFilterRows_NEON for ARM64 Scale Neon implementation 

TESTED=libyuv_unittest
BUG=319
R=fbarchard@chromium.org, fbarchard@google.com

Review URL: https://webrtc-codereview.appspot.com/22439004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1066 16f28f9a-4ce2-e073-06de-1de4eb20be90
parent 218ebde8
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Showing with 33 additions and 34 deletions
source/scale_neon64.cc
View file @ 4e439631
......@@ -531,15 +531,15 @@ void ScaleRowDown38_2_Box_NEON(const uint8* src_ptr,
}
#endif //HAS_SCALEROWDOWN38_NEON
#if 0
// 16x2 -> 16x1
void ScaleFilterRows_NEON(uint8* dst_ptr,
const uint8* src_ptr, ptrdiff_t src_stride,
int dst_width, int source_y_fraction) {
int y_fraction = 256 - source_y_fraction;
asm volatile (
"cmp %4, #0 \n"
"beq 100f \n"
"add %2, %1 \n"
"add %2, %2, %1 \n"
"cmp %4, #64 \n"
"beq 75f \n"
"cmp %4, #128 \n"
......@@ -547,90 +547,89 @@ void ScaleFilterRows_NEON(uint8* dst_ptr,
"cmp %4, #192 \n"
"beq 25f \n"
"vdup.8 d5, %4 \n"
"rsb %4, #256 \n"
"vdup.8 d4, %4 \n"
"dup v5.8b, %w4 \n"
"dup v4.8b, %w5 \n"
// General purpose row blend.
"1: \n"
MEMACCESS(1)
"vld1.8 {q0}, [%1]! \n"
"ld1 {v0.16b}, [%1], #16 \n"
MEMACCESS(2)
"vld1.8 {q1}, [%2]! \n"
"ld1 {v1.16b}, [%2], #16 \n"
"subs %3, %3, #16 \n"
"vmull.u8 q13, d0, d4 \n"
"vmull.u8 q14, d1, d4 \n"
"vmlal.u8 q13, d2, d5 \n"
"vmlal.u8 q14, d3, d5 \n"
"vrshrn.u16 d0, q13, #8 \n"
"vrshrn.u16 d1, q14, #8 \n"
"umull v6.8h, v0.8b, v4.8b \n"
"umull2 v7.8h, v0.16b, v4.16b \n"
"umlal v6.8h, v1.8b, v5.8b \n"
"umlal2 v7.8h, v1.16b, v5.16b \n"
"rshrn v0.8b, v6.8h, #8 \n"
"rshrn2 v0.16b, v7.8h, #8 \n"
MEMACCESS(0)
"vst1.8 {q0}, [%0]! \n"
"st1 {v0.16b}, [%0], #16 \n"
"bgt 1b \n"
"b 99f \n"
// Blend 25 / 75.
"25: \n"
MEMACCESS(1)
"vld1.8 {q0}, [%1]! \n"
"ld1 {v0.16b}, [%1], #16 \n"
MEMACCESS(2)
"vld1.8 {q1}, [%2]! \n"
"ld1 {v1.16b}, [%2], #16 \n"
"subs %3, %3, #16 \n"
"vrhadd.u8 q0, q1 \n"
"vrhadd.u8 q0, q1 \n"
"urhadd v0.16b, v0.16b, v1.16b \n"
"urhadd v0.16b, v0.16b, v1.16b \n"
MEMACCESS(0)
"vst1.8 {q0}, [%0]! \n"
"st1 {v0.16b}, [%0], #16 \n"
"bgt 25b \n"
"b 99f \n"
// Blend 50 / 50.
"50: \n"
MEMACCESS(1)
"vld1.8 {q0}, [%1]! \n"
"ld1 {v0.16b}, [%1], #16 \n"
MEMACCESS(2)
"vld1.8 {q1}, [%2]! \n"
"ld1 {v1.16b}, [%2], #16 \n"
"subs %3, %3, #16 \n"
"vrhadd.u8 q0, q1 \n"
"urhadd v0.16b, v0.16b, v1.16b \n"
MEMACCESS(0)
"vst1.8 {q0}, [%0]! \n"
"st1 {v0.16b}, [%0], #16 \n"
"bgt 50b \n"
"b 99f \n"
// Blend 75 / 25.
"75: \n"
MEMACCESS(1)
"vld1.8 {q1}, [%1]! \n"
"ld1 {v1.16b}, [%1], #16 \n"
MEMACCESS(2)
"vld1.8 {q0}, [%2]! \n"
"ld1 {v0.16b}, [%2], #16 \n"
"subs %3, %3, #16 \n"
"vrhadd.u8 q0, q1 \n"
"vrhadd.u8 q0, q1 \n"
"urhadd v0.16b, v0.16b, v1.16b \n"
"urhadd v0.16b, v0.16b, v1.16b \n"
MEMACCESS(0)
"vst1.8 {q0}, [%0]! \n"
"st1 {v0.16b}, [%0], #16 \n"
"bgt 75b \n"
"b 99f \n"
// Blend 100 / 0 - Copy row unchanged.
"100: \n"
MEMACCESS(1)
"vld1.8 {q0}, [%1]! \n"
"ld1 {v0.16b}, [%1], #16 \n"
"subs %3, %3, #16 \n"
MEMACCESS(0)
"vst1.8 {q0}, [%0]! \n"
"st1 {v0.16b}, [%0], #16 \n"
"bgt 100b \n"
"99: \n"
MEMACCESS(0)
"vst1.8 {d1[7]}, [%0] \n"
"st1 {v0.b}[15], [%0] \n"
: "+r"(dst_ptr), // %0
"+r"(src_ptr), // %1
"+r"(src_stride), // %2
"+r"(dst_width), // %3
"+r"(source_y_fraction) // %4
"+r"(source_y_fraction),// %4
"+r"(y_fraction) // %5
:
: "q0", "q1", "d4", "d5", "q13", "q14", "memory", "cc"
: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "memory", "cc"
);
}
#endif //0
#ifdef HAS_SCALEARGBROWDOWN2_NEON
void ScaleARGBRowDown2_NEON(const uint8* src_ptr, ptrdiff_t src_stride,
......
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