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[AArch64] Add SVE2 implementation of I212ToARGBRow

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Observed reduction in runtime compared to the existing Neon code:

Cortex-A510: -34.5%
Cortex-A520:  -6.5%
Cortex-A715: -10.1%
Cortex-A720: -16.1%
  Cortex-X2: -11.9%
  Cortex-X3: -11.9%
  Cortex-X4:  -9.3%
Cortex-X925: -11.2%

Bug: b/42280942
Change-Id: Idc30e69552f7d227217ac7011a786210b11e4752
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/6025828
Reviewed-by: Justin Green <greenjustin@google.com>
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
This commit is contained in:
George Steed 2024-06-10 13:56:55 +01:00 committed by Frank Barchard
parent 595146434a
commit 305a7a4ede
3 changed files with 77 additions and 0 deletions
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7
include/libyuv/row.h
View File

@ -554,6 +554,7 @@ extern "C" {
#define HAS_DIVIDEROW_16_SVE2
#define HAS_HALFFLOATROW_SVE2
#define HAS_I210TOARGBROW_SVE2
#define HAS_I212TOARGBROW_SVE2
#define HAS_I400TOARGBROW_SVE2
#define HAS_I422ALPHATOARGBROW_SVE2
#define HAS_I422TOARGB1555ROW_SVE2
@ -1131,6 +1132,12 @@ void I212ToARGBRow_NEON(const uint16_t* src_y,
uint8_t* rgb_buf,
const struct YuvConstants* yuvconstants,
int width);
void I212ToARGBRow_SVE2(const uint16_t* src_y,
const uint16_t* src_u,
const uint16_t* src_v,
uint8_t* rgb_buf,
const struct YuvConstants* yuvconstants,
int width);
void I212ToAR30Row_NEON(const uint16_t* src_y,
const uint16_t* src_u,
const uint16_t* src_v,

5
source/convert_argb.cc
View File

@ -1628,6 +1628,11 @@ int I012ToARGBMatrix(const uint16_t* src_y,
I212ToARGBRow = I212ToARGBRow_NEON;
}
}
#endif
#if defined(HAS_I212TOARGBROW_SVE2)
if (TestCpuFlag(kCpuHasSVE2)) {
I212ToARGBRow = I212ToARGBRow_SVE2;
}
#endif
for (y = 0; y < height; ++y) {
I212ToARGBRow(src_y, src_u, src_v, dst_argb, yuvconstants, width);

65
source/row_sve.cc
View File

@ -95,6 +95,23 @@ extern "C" {
"uqshrnb z1.b, z1.h, #2 \n" \
"uqshrnb z2.b, z2.h, #2 \n"
#define READI212_SVE \
"ld1h {z3.h}, p1/z, [%[src_y]] \n" \
"lsl z0.h, z3.h, #4 \n" \
"usra z0.h, z3.h, #8 \n" \
"ld1h {z1.s}, p1/z, [%[src_u]] \n" \
"ld1h {z2.s}, p1/z, [%[src_v]] \n" \
"incb %[src_y] \n" \
"inch %[src_u] \n" \
"inch %[src_v] \n" \
"prfm pldl1keep, [%[src_y], 448] \n" \
"prfm pldl1keep, [%[src_u], 128] \n" \
"prfm pldl1keep, [%[src_v], 128] \n" \
"trn1 z1.h, z1.h, z1.h \n" \
"trn1 z2.h, z2.h, z2.h \n" \
"uqshrnb z1.b, z1.h, #4 \n" \
"uqshrnb z2.b, z2.h, #4 \n"
#define READP210_SVE \
"ld1h {z0.h}, p1/z, [%[src_y]] \n" \
"ld1h {z1.h}, p2/z, [%[src_uv]] \n" \
@ -2100,6 +2117,54 @@ void P410ToAR30Row_SVE2(const uint16_t* src_y,
: "cc", "memory", YUVTORGB_SVE_REGS);
}
void I212ToARGBRow_SVE2(const uint16_t* src_y,
const uint16_t* src_u,
const uint16_t* src_v,
uint8_t* dst_argb,
const struct YuvConstants* yuvconstants,
int width) {
uint64_t vl;
asm("cnth %0" : "=r"(vl));
int width_last_y = width & (vl - 1);
width_last_y = width_last_y == 0 ? vl : width_last_y;
asm volatile(
"ptrue p0.b \n" YUVTORGB_SVE_SETUP
"dup z19.b, #255 \n" // A
"subs %w[width], %w[width], %w[vl] \n"
"b.lt 2f \n"
// Run bulk of computation with an all-true predicate to avoid predicate
// generation overhead.
"ptrue p1.h \n"
"1: \n" //
READI212_SVE I4XXTORGB_SVE RGBTOARGB8_SVE
"subs %w[width], %w[width], %w[vl] \n"
"st2h {z16.h, z17.h}, p1, [%[dst_argb]] \n"
"add %[dst_argb], %[dst_argb], %[vl], lsl #2 \n"
"b.ge 1b \n"
"2: \n"
"adds %w[width], %w[width], %w[vl] \n"
"b.eq 99f \n"
// Calculate a predicate for the final iteration to deal with the tail.
"whilelt p1.h, wzr, %w[width_last_y] \n" //
READI212_SVE I4XXTORGB_SVE RGBTOARGB8_SVE
"st2h {z16.h, z17.h}, p1, [%[dst_argb]] \n"
"99: \n"
: [src_y] "+r"(src_y), // %[src_y]
[src_u] "+r"(src_u), // %[src_u]
[src_v] "+r"(src_v), // %[src_v]
[dst_argb] "+r"(dst_argb), // %[dst_argb]
[width] "+r"(width) // %[width]
: [vl] "r"(vl), // %[vl]
[kUVCoeff] "r"(&yuvconstants->kUVCoeff), // %[kUVCoeff]
[kRGBCoeffBias] "r"(&yuvconstants->kRGBCoeffBias), // %[kRGBCoeffBias]
[width_last_y] "r"(width_last_y) // %[width_last_y]
: "cc", "memory", YUVTORGB_SVE_REGS);
}
#endif // !defined(LIBYUV_DISABLE_SVE) && defined(__aarch64__)
#ifdef __cplusplus