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Test C vs NEON for ScaleDown2Box_16

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TBR=kjellander@chromium.org
BUG=libyuv:718
TEST=LibYUVScaleTest.TestScaleRowDown2Box_16

Change-Id: Ic74d29d6f14983ff26e8af541ef702a0f8bf3f17
Reviewed-on: https://chromium-review.googlesource.com/616189
Reviewed-by: Cheng Wang <wangcheng@google.com>
This commit is contained in:
Frank Barchard 2017-08-16 12:11:16 -07:00
parent 7e59ee4c75
commit bb17da97cf
2 changed files with 33 additions and 19 deletions
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5
source/scale_neon64.cc
View File

@ -1002,7 +1002,7 @@ void ScaleRowDown2Box_16_NEON(const uint16* src_ptr,
int dst_width) {
asm volatile(
// change the stride to row 2 pointer
"add %1, %1, %0 \n"
"add %1, %0, %1, lsl #1 \n" // ptr + stide * 2
"1: \n"
"ld1 {v0.8h, v1.8h}, [%0], #32 \n" // load row 1 and post inc
"ld1 {v2.8h, v3.8h}, [%1], #32 \n" // load row 2 and post inc
@ -1033,8 +1033,7 @@ void ScaleRowUp2_16_NEON(const uint16* src_ptr,
uint16* dst,
int dst_width) {
asm volatile(
// change the stride to row 2 pointer
"add %1, %1, %0 \n"
"add %1, %0, %1, lsl #1 \n" // ptr + stide * 2
"movi v20.4h, #1 \n"
"movi v21.4h, #3 \n" // constants
"movi v22.4h, #9 \n"

47
unit_test/scale_test.cc
View File

@ -457,7 +457,7 @@ extern "C" void ScaleRowUp2_16_NEON(const uint16* src_ptr,
ptrdiff_t src_stride,
uint16* dst,
int dst_width);
TEST_F(LibYUVScaleTest, TestScaleRowUp2_16) {
SIMD_ALIGNED(uint16 orig_pixels[640 * 2 + 1]); // 2 rows + 1 pixel overrun
SIMD_ALIGNED(uint16 dst_pixels_opt[1280]);
@ -471,13 +471,13 @@ TEST_F(LibYUVScaleTest, TestScaleRowUp2_16) {
orig_pixels[i] = i;
}
ScaleRowUp2_16_NEON(&orig_pixels[0],
640 * 2,
640,
&dst_pixels_c[0],
1280);
for (int i = 0; i < benchmark_pixels_div1280_; ++i) {
ScaleRowUp2_16_NEON(&orig_pixels[0],
640 * 2,
640,
&dst_pixels_opt[0],
1280);
}
@ -488,42 +488,57 @@ TEST_F(LibYUVScaleTest, TestScaleRowUp2_16) {
EXPECT_EQ(dst_pixels_c[0], (0 * 9 + 1 * 3 + 640 * 3 + 641 * 1 + 8) / 16);
EXPECT_EQ(dst_pixels_c[1279], 800);
}
#endif
extern "C" void ScaleRowDown2Box_16_NEON(const uint16* src_ptr,
ptrdiff_t src_stride,
uint16* dst,
int dst_width);
TEST_F(LibYUVScaleTest, TestScaleRowDown2Box_16) {
SIMD_ALIGNED(uint16 orig_pixels[2560 * 2]);
SIMD_ALIGNED(uint16 dst_pixels_opt[1280]);
SIMD_ALIGNED(uint16 dst_pixels_c[1280]);
SIMD_ALIGNED(uint16 dst_pixels_opt[1280]);
memset(orig_pixels, 0, sizeof(orig_pixels));
memset(dst_pixels_opt, 1, sizeof(dst_pixels_opt));
memset(dst_pixels_c, 2, sizeof(dst_pixels_c));
memset(dst_pixels_c, 1, sizeof(dst_pixels_c));
memset(dst_pixels_opt, 2, sizeof(dst_pixels_opt));
for (int i = 0; i < 2560 * 2; ++i) {
orig_pixels[i] = i;
}
ScaleRowDown2Box_16_NEON(&orig_pixels[0],
2560 * 2,
ScaleRowDown2Box_16_C(&orig_pixels[0],
2560,
&dst_pixels_c[0],
1280);
for (int i = 0; i < benchmark_pixels_div1280_; ++i) {
ScaleRowDown2Box_16_NEON(&orig_pixels[0],
2560 * 2,
&dst_pixels_opt[0],
1280);
#if !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)
int has_neon = TestCpuFlag(kCpuHasNEON);
if (has_neon) {
ScaleRowDown2Box_16_NEON(&orig_pixels[0],
2560,
&dst_pixels_opt[0],
1280);
} else {
ScaleRowDown2Box_16_C(&orig_pixels[0],
2560,
&dst_pixels_opt[0],
1280);
}
#else
ScaleRowDown2Box_16_C(&orig_pixels[0],
2560,
&dst_pixels_opt[0],
1280);
#endif
}
for (int i = 0; i < 1280; ++i) {
EXPECT_EQ(dst_pixels_c[i], dst_pixels_opt[i]);
}
EXPECT_EQ(dst_pixels_c[0], 1281);
EXPECT_EQ(dst_pixels_c[0], (0 + 1 + 2560 + 2561 + 2) / 4);
EXPECT_EQ(dst_pixels_c[1279], 3839);
}
#endif // __aarch64__
} // namespace libyuv