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/*
* Copyright 2017 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkColorPriv.h"
#include "SkCpu.h"
#include "SkJumper.h"
#include "SkRasterPipeline.h"
#include "SkTemplates.h"
// We'll use __has_feature(memory_sanitizer) to detect MSAN.
// SkJumper_generated.S is not compiled with MSAN, so MSAN would yell really loud.
#if !defined(__has_feature)
#define __has_feature(x) 0
#endif
// Stages expect these constants to be set to these values.
// It's fine to rearrange and add new ones if you update SkJumper_constants.
using K = const SkJumper_constants;
static K kConstants = {
{0.0f, 1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f},
};
// We can't express the real types of most stage functions portably, so we use a stand-in.
// We'll only ever call start_pipeline(), which then chains into the rest for us.
using StageFn = void(void);
// Some platforms expect C "name" maps to asm "_name", others to "name".
#if defined(__APPLE__)
#define ASM(name, suffix) sk_##name##_##suffix
#else
#define ASM(name, suffix) _sk_##name##_##suffix
#endif
extern "C" {
#if __has_feature(memory_sanitizer)
// We'll just run portable code.
#elif defined(__aarch64__)
size_t ASM(start_pipeline,aarch64)(size_t, void**, K*, size_t);
StageFn ASM(just_return,aarch64);
#define M(st) StageFn ASM(st,aarch64);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
#elif defined(__arm__)
size_t ASM(start_pipeline,vfp4)(size_t, void**, K*, size_t);
StageFn ASM(just_return,vfp4);
#define M(st) StageFn ASM(st,vfp4);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
#elif defined(__x86_64__) || defined(_M_X64)
size_t ASM(start_pipeline,hsw )(size_t, void**, K*, size_t);
size_t ASM(start_pipeline,avx )(size_t, void**, K*, size_t);
size_t ASM(start_pipeline,sse41)(size_t, void**, K*, size_t);
size_t ASM(start_pipeline,sse2 )(size_t, void**, K*, size_t);
StageFn ASM(just_return,hsw),
ASM(just_return,avx),
ASM(just_return,sse41),
ASM(just_return,sse2);
#define M(st) StageFn ASM(st,hsw);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
#define M(st) StageFn ASM(st,avx);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
#define M(st) StageFn ASM(st,sse41);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
#define M(st) StageFn ASM(st,sse2);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
#endif
// Portable, single-pixel stages.
size_t sk_start_pipeline(size_t, void**, K*, size_t);
StageFn sk_just_return;
#define M(st) StageFn sk_##st;
SK_RASTER_PIPELINE_STAGES(M)
#undef M
}
// Translate SkRasterPipeline's StockStage enum to StageFn function pointers.
#if __has_feature(memory_sanitizer)
// We'll just run portable code.
#elif defined(__aarch64__)
static StageFn* lookup_aarch64(SkRasterPipeline::StockStage st) {
switch (st) {
#define M(st) case SkRasterPipeline::st: return ASM(st,aarch64);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
}
return nullptr;
}
#elif defined(__arm__)
static StageFn* lookup_vfp4(SkRasterPipeline::StockStage st) {
switch (st) {
#define M(st) case SkRasterPipeline::st: return ASM(st,vfp4);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
}
return nullptr;
}
#elif defined(__x86_64__) || defined(_M_X64)
static StageFn* lookup_hsw(SkRasterPipeline::StockStage st) {
switch (st) {
#define M(st) case SkRasterPipeline::st: return ASM(st,hsw);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
}
return nullptr;
}
static StageFn* lookup_avx(SkRasterPipeline::StockStage st) {
switch (st) {
#define M(st) case SkRasterPipeline::st: return ASM(st,avx);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
}
return nullptr;
}
static StageFn* lookup_sse41(SkRasterPipeline::StockStage st) {
switch (st) {
#define M(st) case SkRasterPipeline::st: return ASM(st,sse41);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
}
return nullptr;
}
static StageFn* lookup_sse2(SkRasterPipeline::StockStage st) {
switch (st) {
#define M(st) case SkRasterPipeline::st: return ASM(st,sse2);
SK_RASTER_PIPELINE_STAGES(M)
#undef M
}
return nullptr;
}
#endif
static StageFn* lookup_portable(SkRasterPipeline::StockStage st) {
switch (st) {
#define M(st) case SkRasterPipeline::st: return sk_##st;
SK_RASTER_PIPELINE_STAGES(M)
#undef M
}
return nullptr;
}
void SkRasterPipeline::run(size_t x, size_t n) const {
SkAutoSTMalloc<64, void*> program(2*fStages.size() + 1);
const size_t limit = x+n;
auto build_and_run = [&](size_t min_stride,
StageFn* (*lookup)(SkRasterPipeline::StockStage),
StageFn* just_return,
size_t (*start_pipeline)(size_t, void**, K*, size_t)) {
if (x + min_stride <= limit) {
void** ip = program.get();
for (auto&& st : fStages) {
auto fn = lookup(st.stage);
SkASSERT(fn);
*ip++ = (void*)fn;
if (st.ctx) {
*ip++ = st.ctx;
}
}
*ip = (void*)just_return;
x = start_pipeline(x, program.get(), &kConstants, limit);
}
};
// While possible, build and run at full vector stride.
#if __has_feature(memory_sanitizer)
// We'll just run portable code.
#elif defined(__aarch64__)
build_and_run(4, lookup_aarch64, ASM(just_return,aarch64), ASM(start_pipeline,aarch64));
#elif defined(__arm__)
if (1 && SkCpu::Supports(SkCpu::NEON|SkCpu::NEON_FMA|SkCpu::VFP_FP16)) {
build_and_run(2, lookup_vfp4, ASM(just_return,vfp4), ASM(start_pipeline,vfp4));
}
#elif defined(__x86_64__) || defined(_M_X64)
if (1 && SkCpu::Supports(SkCpu::HSW)) {
build_and_run(1, lookup_hsw, ASM(just_return,hsw), ASM(start_pipeline,hsw));
}
if (1 && SkCpu::Supports(SkCpu::AVX)) {
build_and_run(1, lookup_avx, ASM(just_return,avx), ASM(start_pipeline,avx));
}
if (1 && SkCpu::Supports(SkCpu::SSE41)) {
build_and_run(4, lookup_sse41, ASM(just_return,sse41), ASM(start_pipeline,sse41));
}
if (1 && SkCpu::Supports(SkCpu::SSE2)) {
build_and_run(4, lookup_sse2, ASM(just_return,sse2), ASM(start_pipeline,sse2));
}
#endif
// Finish up any leftover with portable code one pixel at a time.
build_and_run(1, lookup_portable, sk_just_return, sk_start_pipeline);
}
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