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[AArch64] Add SME impls of ScaleRowDown2{,Linear,Box}_16

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Mostly just straightforward copies of the Neon code ported to
Streaming-SVE, these follow the same pattern as the prior ScaleRowDown2
SME kernels, but operating on 16-bit data rather than 8-bit.

These is no benefit from this kernel when the SVE vector length is only
128 bits, so skip writing a non-streaming SVE implementation.

Change-Id: I7bad0719d24cdb1760d1039c63c0e77726b28a54
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/6070784
Reviewed-by: Frank Barchard <fbarchard@chromium.org>
Reviewed-by: Justin Green <greenjustin@google.com>
This commit is contained in:
George Steed 2024-11-15 21:28:49 +00:00 committed by Frank Barchard
parent 15f2ae7d70
commit 85331e00cc
3 changed files with 167 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

45
include/libyuv/scale_row.h
View File

@ -124,11 +124,12 @@ extern "C" {
// The following are available on AArch64 SME platforms:
#if !defined(LIBYUV_DISABLE_SME) && defined(CLANG_HAS_SME) && \
defined(__aarch64__)
#define HAS_SCALEROWDOWN2_SME
#define HAS_SCALEUVROWDOWN2_SME
#define HAS_SCALEUVROWDOWN2LINEAR_SME
#define HAS_SCALEUVROWDOWN2BOX_SME
#define HAS_SCALEARGBROWDOWN2_SME
#define HAS_SCALEROWDOWN2_16_SME
#define HAS_SCALEROWDOWN2_SME
#define HAS_SCALEUVROWDOWN2BOX_SME
#define HAS_SCALEUVROWDOWN2LINEAR_SME
#define HAS_SCALEUVROWDOWN2_SME
#endif
#if !defined(LIBYUV_DISABLE_MSA) && defined(__mips_msa)
@ -326,10 +327,6 @@ void ScaleRowDown2Box_16_C(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width);
void ScaleRowDown2Box_16_NEON(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width);
void ScaleRowDown2Box_16To8_C(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint8_t* dst,
@ -1441,26 +1438,34 @@ void ScaleRowDown2_NEON(const uint8_t* src_ptr,
ptrdiff_t src_stride,
uint8_t* dst,
int dst_width);
void ScaleRowDown2_16_NEON(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width);
void ScaleRowDown2_SME(const uint8_t* src_ptr,
ptrdiff_t src_stride,
uint8_t* dst,
int dst_width);
void ScaleRowDown2_16_NEON(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width);
void ScaleRowDown2_16_SME(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width);
void ScaleRowDown2Linear_NEON(const uint8_t* src_ptr,
ptrdiff_t src_stride,
uint8_t* dst,
int dst_width);
void ScaleRowDown2Linear_16_NEON(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width);
void ScaleRowDown2Linear_SME(const uint8_t* src_ptr,
ptrdiff_t src_stride,
uint8_t* dst,
int dst_width);
void ScaleRowDown2Linear_16_NEON(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width);
void ScaleRowDown2Linear_16_SME(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width);
void ScaleRowDown2Box_NEON(const uint8_t* src_ptr,
ptrdiff_t src_stride,
uint8_t* dst,
@ -1469,6 +1474,14 @@ void ScaleRowDown2Box_SME(const uint8_t* src_ptr,
ptrdiff_t src_stride,
uint8_t* dst,
int dst_width);
void ScaleRowDown2Box_16_NEON(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width);
void ScaleRowDown2Box_16_SME(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width);
void ScaleRowDown4_NEON(const uint8_t* src_ptr,
ptrdiff_t src_stride,

7
source/scale.cc
View File

@ -193,6 +193,13 @@ static void ScalePlaneDown2_16(int src_width,
: ScaleRowDown2Box_16_NEON;
}
#endif
#if defined(HAS_SCALEROWDOWN2_16_SME)
if (TestCpuFlag(kCpuHasSME)) {
ScaleRowDown2 = filtering == kFilterNone ? ScaleRowDown2_16_SME
: filtering == kFilterLinear ? ScaleRowDown2Linear_16_SME
: ScaleRowDown2Box_16_SME;
}
#endif
#if defined(HAS_SCALEROWDOWN2_16_SSE2)
if (TestCpuFlag(kCpuHasSSE2) && IS_ALIGNED(dst_width, 16)) {
ScaleRowDown2 =

131
source/scale_sme.cc
View File

@ -57,6 +57,44 @@ __arm_locally_streaming void ScaleRowDown2_SME(const uint8_t* src_ptr,
: "memory", "cc", "z0", "z1", "p0");
}
__arm_locally_streaming void ScaleRowDown2_16_SME(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width) {
// Streaming-SVE only, no use of ZA tile.
(void)src_stride;
int vl;
asm volatile(
"cnth %x[vl] \n"
"subs %w[dst_width], %w[dst_width], %w[vl] \n"
"b.lt 2f \n"
"1: \n"
"ptrue p0.h \n"
"ld2h {z0.h, z1.h}, p0/z, [%[src_ptr]] \n"
"incb %[src_ptr], all, mul #2 \n"
"subs %w[dst_width], %w[dst_width], %w[vl] \n"
"st1h {z1.h}, p0, [%[dst_ptr]] \n"
"incb %[dst_ptr] \n"
"b.ge 1b \n"
"2: \n"
"adds %w[dst_width], %w[dst_width], %w[vl] \n"
"b.eq 99f \n"
"whilelt p0.h, wzr, %w[dst_width] \n"
"ld2h {z0.h, z1.h}, p0/z, [%[src_ptr]] \n"
"st1h {z1.h}, p0, [%[dst_ptr]] \n"
"99: \n"
: [src_ptr] "+r"(src_ptr), // %[src_ptr]
[dst_ptr] "+r"(dst), // %[dst_ptr]
[dst_width] "+r"(dst_width), // %[dst_width]
[vl] "=r"(vl) // %[vl]
:
: "memory", "cc", "z0", "z1", "p0");
}
__arm_locally_streaming void ScaleRowDown2Linear_SME(const uint8_t* src_ptr,
ptrdiff_t src_stride,
uint8_t* dst,
@ -97,6 +135,46 @@ __arm_locally_streaming void ScaleRowDown2Linear_SME(const uint8_t* src_ptr,
: "memory", "cc", "z0", "z1", "p0");
}
__arm_locally_streaming void ScaleRowDown2Linear_16_SME(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width) {
// Streaming-SVE only, no use of ZA tile.
(void)src_stride;
int vl;
asm volatile(
"cnth %x[vl] \n"
"subs %w[dst_width], %w[dst_width], %w[vl] \n"
"b.lt 2f \n"
"1: \n"
"ptrue p0.h \n"
"ld2h {z0.h, z1.h}, p0/z, [%[src_ptr]] \n"
"incb %[src_ptr], all, mul #2 \n"
"urhadd z0.h, p0/m, z0.h, z1.h \n"
"subs %w[dst_width], %w[dst_width], %w[vl] \n"
"st1h {z0.h}, p0, [%[dst_ptr]] \n"
"incb %[dst_ptr] \n"
"b.ge 1b \n"
"2: \n"
"adds %w[dst_width], %w[dst_width], %w[vl] \n"
"b.eq 99f \n"
"whilelt p0.h, wzr, %w[dst_width] \n"
"ld2h {z0.h, z1.h}, p0/z, [%[src_ptr]] \n"
"urhadd z0.h, p0/m, z0.h, z1.h \n"
"st1h {z0.h}, p0, [%[dst_ptr]] \n"
"99: \n"
: [src_ptr] "+r"(src_ptr), // %[src_ptr]
[dst_ptr] "+r"(dst), // %[dst_ptr]
[dst_width] "+r"(dst_width), // %[dst_width]
[vl] "=r"(vl) // %[vl]
:
: "memory", "cc", "z0", "z1", "p0");
}
#define SCALEROWDOWN2BOX_SVE \
"ld2b {z0.b, z1.b}, p0/z, [%[src_ptr]] \n" \
"ld2b {z2.b, z3.b}, p0/z, [%[src2_ptr]] \n" \
@ -150,6 +228,59 @@ __arm_locally_streaming void ScaleRowDown2Box_SME(const uint8_t* src_ptr,
#undef SCALEROWDOWN2BOX_SVE
#define SCALEROWDOWN2BOX_16_SVE \
"ld2h {z0.h, z1.h}, p0/z, [%[src_ptr]] \n" \
"ld2h {z2.h, z3.h}, p0/z, [%[src2_ptr]] \n" \
"incb %[src_ptr], all, mul #2 \n" \
"incb %[src2_ptr], all, mul #2 \n" \
"uaddlb z4.s, z0.h, z1.h \n" \
"uaddlt z5.s, z0.h, z1.h \n" \
"uaddlb z6.s, z2.h, z3.h \n" \
"uaddlt z7.s, z2.h, z3.h \n" \
"add z4.s, z4.s, z6.s \n" \
"add z5.s, z5.s, z7.s \n" \
"rshrnb z0.h, z4.s, #2 \n" \
"rshrnt z0.h, z5.s, #2 \n" \
"subs %w[dst_width], %w[dst_width], %w[vl] \n" \
"st1h {z0.h}, p0, [%[dst_ptr]] \n" \
"incb %[dst_ptr] \n"
__arm_locally_streaming void ScaleRowDown2Box_16_SME(const uint16_t* src_ptr,
ptrdiff_t src_stride,
uint16_t* dst,
int dst_width) {
// Streaming-SVE only, no use of ZA tile.
const uint16_t* src2_ptr = src_ptr + src_stride;
int vl;
asm volatile(
"cnth %x[vl] \n"
"subs %w[dst_width], %w[dst_width], %w[vl] \n"
"b.lt 2f \n"
"ptrue p0.h \n"
"1: \n" //
SCALEROWDOWN2BOX_16_SVE
"b.ge 1b \n"
"2: \n"
"adds %w[dst_width], %w[dst_width], %w[vl] \n"
"b.eq 99f \n"
"whilelt p0.h, wzr, %w[dst_width] \n" //
SCALEROWDOWN2BOX_16_SVE
"99: \n"
: [src_ptr] "+r"(src_ptr), // %[src_ptr]
[src2_ptr] "+r"(src2_ptr), // %[src2_ptr]
[dst_ptr] "+r"(dst), // %[dst_ptr]
[dst_width] "+r"(dst_width), // %[dst_width]
[vl] "=r"(vl) // %[vl]
:
: "memory", "cc", "z0", "z1", "z2", "z3", "z4", "z5", "z6", "z7", "p0");
}
#undef SCALEROWDOWN2BOX_16_SVE
__arm_locally_streaming void ScaleUVRowDown2_SME(const uint8_t* src_uv,
ptrdiff_t src_stride,
uint8_t* dst_uv,