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Add ScaleAddRows_NEON for ARM32/64

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ARM32/64 NEON versions of ScaleAddRows_NEON are implemented.

BUG=319
TESTED=libyuvTest.Scale* on ARM32/64 with Android
R=fbarchard@google.com

Change-Id: I45b88c2b5f576042ba5b3d8d6f8851257fdb7218

Review URL: https://webrtc-codereview.appspot.com/46379004

git-svn-id: http://libyuv.googlecode.com/svn/trunk@1326 16f28f9a-4ce2-e073-06de-1de4eb20be90
This commit is contained in:
yang.zhang@arm.com 2015-03-16 02:57:46 +00:00
parent 63726ed9c6
commit ca5b1bd58b
4 changed files with 77 additions and 0 deletions
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4
include/libyuv/scale_row.h
View File

@ -51,6 +51,7 @@ extern "C" {
#define HAS_SCALEROWDOWN38_NEON
#define HAS_SCALEARGBROWDOWNEVEN_NEON
#define HAS_SCALEARGBROWDOWN2_NEON
#define HAS_SCALEADDROWS_NEON
#endif
// The following are available on Mips platforms:
@ -305,6 +306,9 @@ void ScaleRowDown38_2_Box_NEON(const uint8* src_ptr,
ptrdiff_t src_stride,
uint8* dst_ptr, int dst_width);
void ScaleAddRows_NEON(const uint8* src_ptr, ptrdiff_t src_stride,
uint16* dst_ptr, int src_width, int src_height);
void ScaleRowDown2_MIPS_DSPR2(const uint8* src_ptr, ptrdiff_t src_stride,
uint8* dst, int dst_width);
void ScaleRowDown2Box_MIPS_DSPR2(const uint8* src_ptr, ptrdiff_t src_stride,

6
source/scale.cc
View File

@ -758,6 +758,12 @@ static void ScalePlaneBox(int src_width, int src_height,
}
#endif
#if defined(HAS_SCALEADDROWS_NEON)
if (TestCpuFlag(kCpuHasNEON) && IS_ALIGNED(src_width, 16)) {
ScaleAddRows = ScaleAddRows_NEON;
}
#endif
for (j = 0; j < dst_height; ++j) {
int boxheight;
int iy = y >> 16;

34
source/scale_neon.cc
View File

@ -541,6 +541,40 @@ void ScaleRowDown38_2_Box_NEON(const uint8* src_ptr,
);
}
void ScaleAddRows_NEON(const uint8* src_ptr, ptrdiff_t src_stride,
uint16* dst_ptr, int src_width, int src_height) {
const uint8* src_tmp = NULL;
asm volatile (
".p2align 2 \n"
"1: \n"
"mov %0, %1 \n"
"mov r12, %5 \n"
"veor q2, q2, q2 \n"
"veor q3, q3, q3 \n"
"2: \n"
// load 16 pixels into q0
MEMACCESS(0)
"vld1.8 {q0}, [%0], %3 \n"
"vaddw.u8 q3, q3, d1 \n"
"vaddw.u8 q2, q2, d0 \n"
"subs r12, r12, #1 \n"
"bgt 2b \n"
MEMACCESS(2)
"vst1.16 {q2, q3}, [%2]! \n" // store pixels
"add %1, %1, #16 \n"
"subs %4, %4, #16 \n" // 16 processed per loop
"bgt 1b \n"
: "+r"(src_tmp), // %0
"+r"(src_ptr), // %1
"+r"(dst_ptr), // %2
"+r"(src_stride), // %3
"+r"(src_width), // %4
"+r"(src_height) // %5
:
: "memory", "cc", "r12", "q0", "q1", "q2", "q3" // Clobber List
);
}
// 16x2 -> 16x1
void ScaleFilterRows_NEON(uint8* dst_ptr,
const uint8* src_ptr, ptrdiff_t src_stride,

33
source/scale_neon64.cc
View File

@ -545,6 +545,39 @@ void ScaleRowDown38_2_Box_NEON(const uint8* src_ptr,
);
}
void ScaleAddRows_NEON(const uint8* src_ptr, ptrdiff_t src_stride,
uint16* dst_ptr, int src_width, int src_height) {
const uint8* src_tmp = NULL;
asm volatile (
"1: \n"
"mov %0, %1 \n"
"mov x12, %5 \n"
"eor v2.16b, v2.16b, v2.16b \n"
"eor v3.16b, v3.16b, v3.16b \n"
"2: \n"
// load 16 pixels into q0
MEMACCESS(0)
"ld1 {v0.16b}, [%0], %3 \n"
"uaddw2 v3.8h, v3.8h, v0.16b \n"
"uaddw v2.8h, v2.8h, v0.8b \n"
"subs x12, x12, #1 \n"
"b.gt 2b \n"
MEMACCESS(2)
"st1 {v2.8h, v3.8h}, [%2], #32 \n" // store pixels
"add %1, %1, #16 \n"
"subs %4, %4, #16 \n" // 16 processed per loop
"b.gt 1b \n"
: "+r"(src_tmp), // %0
"+r"(src_ptr), // %1
"+r"(dst_ptr), // %2
"+r"(src_stride), // %3
"+r"(src_width), // %4
"+r"(src_height) // %5
:
: "memory", "cc", "x12", "v0", "v1", "v2", "v3" // Clobber List
);
}
// 16x2 -> 16x1
void ScaleFilterRows_NEON(uint8* dst_ptr,
const uint8* src_ptr, ptrdiff_t src_stride,