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Revert of SkNx refactoring (patchset #4 id:60001 of https://codereview.chromium.org/1690633003/ )

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Reason for revert:
Precautionary revert for chromium:586487

Original issue's description:
> SkNx refactoring
>
>   - add back Sk4i typedef
>   - define SSE casts in terms of Sk4i
>       * uint8  <-> float becomes uint8  <-> int <-> float
>       * uint16 <-> float becomes uint16 <-> int <-> float
>
>     This has the nice side effect of specializing uint8 <-> int
>     and uint16 <-> int, which are useful in their own right.
>
> There are many cast specializations now, some of which call each other.
> I have tried to arrange them in some sort of sensible order, subject to
> the constraint that those called must precede those who call.
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1690633003
> CQ_EXTRA_TRYBOTS=client.skia:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD-Trybot
>
> Committed: https://skia.googlesource.com/skia/+/c1eb311f4e98934476f1b2ad5d6de772cf140d60

TBR=herb@google.com,mtklein@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=chromium:586487

Review URL: https://codereview.chromium.org/1696903002
This commit is contained in:
mtklein 2016-02-12 14:19:06 -08:00 committed by Commit bot
parent fed90d4712
commit 97120a7ed1
2 changed files with 36 additions and 53 deletions
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2
src/core/SkNx.h
View File

@ -199,8 +199,6 @@ typedef SkNx<16, uint8_t> Sk16b;
typedef SkNx<4, uint16_t> Sk4h;
typedef SkNx<16, uint16_t> Sk16h;
typedef SkNx<4, int> Sk4i;
// Include platform specific specializations if available.
#if !defined(SKNX_NO_SIMD) && SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
#include "../opts/SkNx_sse.h"

83
src/opts/SkNx_sse.h
View File

@ -295,37 +295,8 @@ public:
};
template<> /*static*/ inline Sk4h SkNx_cast<uint16_t, uint8_t>(const Sk4b& src) {
return _mm_unpacklo_epi8(src.fVec, _mm_setzero_si128());
}
template<> /*static*/ inline Sk4i SkNx_cast< int, uint8_t>(const Sk4b& src) {
#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3
const int _ = ~0;
return _mm_shuffle_epi8(src.fVec, _mm_setr_epi8(0,_,_,_, 1,_,_,_, 2,_,_,_, 3,_,_,_));
#else
return _mm_unpacklo_epi16(SkNx_cast<uint16_t>(src).fVec, _mm_setzero_si128());
#endif
}
template<> /*static*/ inline Sk4b SkNx_cast<uint8_t, uint16_t>(const Sk4h& src) {
return _mm_packus_epi16(src.fVec, src.fVec);
}
template<> /*static*/ inline Sk4i SkNx_cast< int, uint16_t>(const Sk4h& src) {
return _mm_unpacklo_epi16(src.fVec, _mm_setzero_si128());
}
template<> /*static*/ inline Sk4b SkNx_cast<uint8_t, int>(const Sk4i& src) {
#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3
const int _ = ~0;
return _mm_shuffle_epi8(src.fVec, _mm_setr_epi8(0,4,8,12, _,_,_,_, _,_,_,_, _,_,_,_));
#else
// We're on our way to 8-bit anyway, so we don't care that _mm_packs_epi32 clamps to int16_t.
Sk4h _16 = _mm_packs_epi32(src.fVec, src.fVec);
return SkNx_cast<uint8_t>(_16);
#endif
}
template<> /*static*/ inline Sk4h SkNx_cast<uint16_t, int>(const Sk4i& src) {
auto _32 = src.fVec;
template<> /*static*/ inline Sk4h SkNx_cast<uint16_t, float>(const Sk4f& src) {
auto _32 = _mm_cvttps_epi32(src.fVec);
// Ideally we'd use _mm_packus_epi32 here. But that's SSE4.1+.
#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3
// With SSSE3, we can just shuffle the low 2 bytes from each lane right into place.
@ -338,34 +309,48 @@ template<> /*static*/ inline Sk4h SkNx_cast<uint16_t, int>(const Sk4i& src) {
#endif
}
template<> /*static*/ inline Sk4f SkNx_cast<float, int>(const Sk4i& src) {
return _mm_cvtepi32_ps(src.fVec);
}
template<> /*static*/ inline Sk4f SkNx_cast<float, uint16_t>(const Sk4h& src) {
return SkNx_cast<float>(SkNx_cast<int>(src));
}
template<> /*static*/ inline Sk4f SkNx_cast<float, uint8_t>(const Sk4b& src) {
return SkNx_cast<float>(SkNx_cast<int>(src));
template<> /*static*/ inline Sk4b SkNx_cast<uint8_t, float>(const Sk4f& src) {
auto _32 = _mm_cvttps_epi32(src.fVec);
#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3
const int _ = ~0;
return _mm_shuffle_epi8(_32, _mm_setr_epi8(0,4,8,12, _,_,_,_, _,_,_,_, _,_,_,_));
#else
auto _16 = _mm_packus_epi16(_32, _32);
return _mm_packus_epi16(_16, _16);
#endif
}
template<> /*static*/ inline Sk4i SkNx_cast< int, float>(const Sk4f& src) {
return _mm_cvttps_epi32(src.fVec);
template<> /*static*/ inline Sk4f SkNx_cast<float, uint8_t>(const Sk4b& src) {
#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3
const int _ = ~0;
auto _32 = _mm_shuffle_epi8(src.fVec, _mm_setr_epi8(0,_,_,_, 1,_,_,_, 2,_,_,_, 3,_,_,_));
#else
auto _16 = _mm_unpacklo_epi8(src.fVec, _mm_setzero_si128()),
_32 = _mm_unpacklo_epi16(_16, _mm_setzero_si128());
#endif
return _mm_cvtepi32_ps(_32);
}
template<> /*static*/ inline Sk4h SkNx_cast<uint16_t, float>(const Sk4f& src) {
return SkNx_cast<uint16_t>(SkNx_cast<int>(src));
}
template<> /*static*/ inline Sk4b SkNx_cast< uint8_t, float>(const Sk4f& src) {
return SkNx_cast<uint8_t>(SkNx_cast<int>(src));
template<> /*static*/ inline Sk4f SkNx_cast<float, uint16_t>(const Sk4h& src) {
auto _32 = _mm_unpacklo_epi16(src.fVec, _mm_setzero_si128());
return _mm_cvtepi32_ps(_32);
}
static inline void Sk4f_ToBytes(uint8_t bytes[16],
const Sk4f& a, const Sk4f& b, const Sk4f& c, const Sk4f& d) {
// We're on our way to 8-bit anyway, so we don't care that _mm_packs_epi32 clamps to int16_t.
_mm_storeu_si128((__m128i*)bytes,
_mm_packus_epi16(_mm_packs_epi32(_mm_cvttps_epi32(a.fVec),
_mm_packus_epi16(_mm_packus_epi16(_mm_cvttps_epi32(a.fVec),
_mm_cvttps_epi32(b.fVec)),
_mm_packs_epi32(_mm_cvttps_epi32(c.fVec),
_mm_packus_epi16(_mm_cvttps_epi32(c.fVec),
_mm_cvttps_epi32(d.fVec))));
}
template<> /*static*/ inline Sk4h SkNx_cast<uint16_t, uint8_t>(const Sk4b& src) {
return _mm_unpacklo_epi8(src.fVec, _mm_setzero_si128());
}
template<> /*static*/ inline Sk4b SkNx_cast<uint8_t, uint16_t>(const Sk4h& src) {
return _mm_packus_epi16(src.fVec, src.fVec);
}
#endif//SkNx_sse_DEFINED