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chromium/SOURCES/skia-vsx-instructions.patch

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Index: chromium-123.0.6312.58/third_party/skia/BUILD.gn
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/BUILD.gn
+++ chromium-123.0.6312.58/third_party/skia/BUILD.gn
@@ -199,6 +199,12 @@ opts("skx") {
}
}
+opts("vsx") {
+ enabled = current_cpu == "ppc64"
+ sources = skia_opts.vsx_sources
+ cflags = [ "-mcpu=power9", "-mtune=power9" ]
+}
+
# Any feature of Skia that requires third-party code should be optional and use this template.
template("optional") {
if (invoker.enabled) {
@@ -1474,6 +1480,7 @@ skia_component("skia") {
":skx",
":typeface_fontations",
":vello",
+ ":vsx",
":webp_decode",
":wuffs",
":xml",
@@ -1651,7 +1658,10 @@ skia_static_library("pathkit") {
public_configs = [ ":skia_public" ]
configs = skia_library_configs
- deps = [ ":hsw" ]
+ deps = [
+ ":hsw",
+ ":vsx",
+ ]
sources = []
sources += skia_pathops_sources
Index: chromium-123.0.6312.58/third_party/skia/gn/skia/BUILD.gn
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/gn/skia/BUILD.gn
+++ chromium-123.0.6312.58/third_party/skia/gn/skia/BUILD.gn
@@ -163,6 +163,8 @@ config("default") {
"-mfpmath=sse",
]
ldflags += [ "-m32" ]
+ } else if (current_cpu == "ppc64") {
+ cflags += [ "-mcpu=power9", "-mtune=power9" ]
}
if (malloc != "" && !is_win) {
Index: chromium-123.0.6312.58/third_party/skia/include/core/SkTypes.h
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/include/core/SkTypes.h
+++ chromium-123.0.6312.58/third_party/skia/include/core/SkTypes.h
@@ -195,5 +195,44 @@ static constexpr uint32_t SK_InvalidGenI
*/
static constexpr uint32_t SK_InvalidUniqueID = 0;
+//////////////////////////////////////////////////////////////////////
+// PPC defines
+
+#if defined(__powerpc64__) || defined(__PPC64__)
+ #ifndef SK_CPU_PPC64
+ #define SK_CPU_PPC64
+ #endif
+ #undef SK_CPU_SSE_LEVEL
+#endif
+
+// Newer versions of clang and gcc for ppc64 ship with wrappers that translate
+// Intel vector intrinsics into PPC VSX instrinsics, so we can pretend to have
+// to be Intel. Currently, full API support for SSSE3 on POWER8 and later
+// processors.
+#if defined(__POWER8_VECTOR__) && defined(__has_include) && \
+ !defined(SK_CPU_SSE_LEVEL)
+
+ // Clang ships both Intel and PPC headers in its PPC version, storing the
+ // PPC compatibility in a subdirectory that the compiler will include before
+ // its standard library include directory.
+ #if (__has_include(<tmmintrin.h>) && !defined(__clang__)) || \
+ __has_include(<ppc_wrappers/tmmintrin.h>)
+ #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSSE3
+ #elif (__has_include(<emmintrin.h>) && !defined(__clang__)) || \
+ __has_include(<ppc_wrappers/emmintrin.h>)
+ #define SK_CPU_SSE_LEVEL SK_CPU_SSE_LEVEL_SSE2
+ #endif
+
+ #ifdef SK_CPU_SSE_LEVEL
+ #define SK_PPC64_HAS_SSE_COMPAT
+ #ifndef NO_WARN_X86_INTRINSICS
+ #define NO_WARN_X86_INTRINSICS
+ #endif
+ #if defined(__clang__)
+ #define SK_PPC64_CLANG_MFPPR_BUG
+ #endif
+ #endif
+#endif
+
#endif
Index: chromium-123.0.6312.58/third_party/skia/src/base/SkSpinlock.cpp
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/base/SkSpinlock.cpp
+++ chromium-123.0.6312.58/third_party/skia/src/base/SkSpinlock.cpp
@@ -33,7 +33,8 @@
#endif
// Renamed from "pause" to avoid conflict with function defined in unistd.h
-#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
+#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2 && \
+ !defined(SK_PPC64_CLANG_MFPPR_BUG)
#include <emmintrin.h>
static void do_pause() { _mm_pause(); }
#else
Index: chromium-123.0.6312.58/third_party/skia/src/opts/SkBitmapProcState_opts.h
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/opts/SkBitmapProcState_opts.h
+++ chromium-123.0.6312.58/third_party/skia/src/opts/SkBitmapProcState_opts.h
@@ -21,7 +21,13 @@
// The rest are scattershot at the moment but I want to get them
// all migrated to be normal code inside SkBitmapProcState.cpp.
-#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
+#if defined(SK_PPC64_HAS_SSE_COMPAT)
+ #if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSSE3
+ #include <tmmintrin.h>
+ #else
+ #include <emmintrin.h>
+ #endif
+#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
#include <immintrin.h>
#elif defined(SK_ARM_HAS_NEON)
#include <arm_neon.h>
Index: chromium-123.0.6312.58/third_party/skia/src/opts/SkBlitRow_opts.h
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/opts/SkBlitRow_opts.h
+++ chromium-123.0.6312.58/third_party/skia/src/opts/SkBlitRow_opts.h
@@ -69,7 +69,7 @@
#endif
#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE2
- #include <immintrin.h>
+ #include <emmintrin.h>
static inline __m128i SkPMSrcOver_SSE2(const __m128i& src, const __m128i& dst) {
__m128i scale = _mm_sub_epi32(_mm_set1_epi32(256),
Index: chromium-123.0.6312.58/third_party/skia/src/opts/SkRasterPipeline_opts.h
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/opts/SkRasterPipeline_opts.h
+++ chromium-123.0.6312.58/third_party/skia/src/opts/SkRasterPipeline_opts.h
@@ -1,5 +1,6 @@
/*
* Copyright 2018 Google Inc.
+ * Copyright 2023 Raptor Engineering, LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
@@ -74,6 +75,8 @@ using NoCtx = const void*;
#define JUMPER_IS_SCALAR
#elif defined(SK_ARM_HAS_NEON)
#define JUMPER_IS_NEON
+#elif defined(SK_PPC64_HAS_SSE_COMPAT)
+ #define JUMPER_IS_VSX
#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SKX
#define JUMPER_IS_SKX
#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_AVX2
@@ -106,6 +109,8 @@ using NoCtx = const void*;
#include <math.h>
#elif defined(JUMPER_IS_NEON)
#include <arm_neon.h>
+#elif defined(JUMPER_IS_VSX)
+ #include <emmintrin.h>
#else
#include <immintrin.h>
#endif
@@ -197,6 +202,182 @@ namespace SK_OPTS_NS {
ptr[3] = a;
}
+#elif defined(JUMPER_IS_VSX)
+ // Since we know we're using Clang, we can use its vector extensions.
+ template <typename T> using V = T __attribute__((ext_vector_type(4)));
+ using F = V<float >;
+ using I32 = V< int32_t>;
+ using U64 = V<uint64_t>;
+ using U32 = V<uint32_t>;
+ using U16 = V<uint16_t>;
+ using U8 = V<uint8_t >;
+
+ // We polyfill a few routines that Clang doesn't build into ext_vector_types.
+ SI F min(F a, F b) { return vec_min(a,b); }
+ SI I32 min(I32 a, I32 b) { return vec_min(a,b); }
+ SI U32 min(U32 a, U32 b) { return vec_min(a,b); }
+ SI F max(F a, F b) { return vec_max(a,b); }
+ SI I32 max(I32 a, I32 b) { return vec_max(a,b); }
+ SI U32 max(U32 a, U32 b) { return vec_max(a,b); }
+
+ SI F abs_ (F v) { return vec_abs(v); }
+ SI I32 abs_ (I32 v) { return vec_abs(v); }
+ SI F rcp_approx(F v) { return vec_re(v); }
+ SI F rcp_precise (F v) { F e = rcp_approx(v); return e * (2.0f - v * e); }
+ SI F rsqrt_approx (F v) { return vec_rsqrte(v); }
+
+ SI U16 pack(U32 v) { return __builtin_convertvector(v, U16); }
+ SI U8 pack(U16 v) { return __builtin_convertvector(v, U8); }
+
+ SI F if_then_else(I32 c, F t, F e) {
+ return vec_or((vector float)vec_and((vector float)c, (vector float)t), (vector float)vec_andc((vector float)e, (vector float)c));
+ }
+ SI I32 if_then_else(I32 c, I32 t, I32 e) {
+ return vec_or((vector unsigned int)vec_and((vector unsigned int)c, (vector unsigned int)t), (vector unsigned int)vec_andc((vector unsigned int)e, (vector unsigned int)c));
+ }
+
+ // In both AltiVec and SSE there is no horizontal element compare, unlike ARM. Fall back to scalar operations here...
+ SI bool any(I32 c) {
+ if (vec_extract((U32)c, 0) != 0) return 1;
+ if (vec_extract((U32)c, 1) != 0) return 1;
+ if (vec_extract((U32)c, 2) != 0) return 1;
+ if (vec_extract((U32)c, 3) != 0) return 1;
+ return 0;
+ }
+ SI bool all(I32 c) {
+ if (vec_extract((U32)c, 0) == 0) return 0;
+ if (vec_extract((U32)c, 1) == 0) return 0;
+ if (vec_extract((U32)c, 2) == 0) return 0;
+ if (vec_extract((U32)c, 3) == 0) return 0;
+ return 1;
+ }
+
+ SI F mad(F f, F m, F a) { return vec_madd(f,m,a); }
+ SI F floor_(F v) { return vec_floor(v); }
+ SI F ceil_(F v) { return vec_ceil(v); }
+ SI F sqrt_(F v) { return vec_sqrt(v); }
+ SI U32 round(F v) { return vec_cts((vector float)vec_rint(v), 0); }
+ SI U32 round(F v, F scale) { return vec_cts((vector float)vec_rint(v*scale), 0); }
+
+ template <typename T>
+ SI V<T> gather(const T* p, U32 ix) {
+ return {p[ix[0]], p[ix[1]], p[ix[2]], p[ix[3]]};
+ }
+ template <typename V, typename S>
+ SI void scatter_masked(V src, S* dst, U32 ix, I32 mask) {
+ V before = gather(dst, ix);
+ V after = if_then_else(mask, src, before);
+ dst[ix[0]] = after[0];
+ dst[ix[1]] = after[1];
+ dst[ix[2]] = after[2];
+ dst[ix[3]] = after[3];
+ }
+
+ // TODO
+ // Finish converting these functions from the SSE translation layer to native AltiVec / VSX
+ SI void load2(const uint16_t* ptr, U16* r, U16* g) {
+ __m128i _01;
+ _01 = _mm_loadu_si128(((__m128i*)ptr) + 0); // r0 g0 r1 g1 r2 g2 r3 g3
+ auto rg01_23 = _mm_shufflelo_epi16(_01, 0xD8); // r0 r1 g0 g1 r2 g2 r3 g3
+ auto rg = _mm_shufflehi_epi16(rg01_23, 0xD8); // r0 r1 g0 g1 r2 r3 g2 g3
+
+ auto R = _mm_shuffle_epi32(rg, 0x88); // r0 r1 r2 r3 r0 r1 r2 r3
+ auto G = _mm_shuffle_epi32(rg, 0xDD); // g0 g1 g2 g3 g0 g1 g2 g3
+ *r = sk_unaligned_load<U16>(&R);
+ *g = sk_unaligned_load<U16>(&G);
+ }
+
+ SI void store2(uint16_t* ptr, U16 r, U16 g) {
+ U32 rg = _mm_unpacklo_epi16(widen_cast<__m128i>(r), widen_cast<__m128i>(g));
+ _mm_storeu_si128((__m128i*)ptr + 0, rg);
+ }
+
+ SI void load3(const uint16_t* ptr, U16* r, U16* g, U16* b) {
+ __m128i _0, _1, _2, _3;
+ // Load slightly weirdly to make sure we don't load past the end of 4x48 bits.
+ auto _01 = _mm_loadu_si128((const __m128i*)(ptr + 0)) ,
+ _23 = _mm_srli_si128(_mm_loadu_si128((const __m128i*)(ptr + 4)), 4);
+
+ // Each _N holds R,G,B for pixel N in its lower 3 lanes (upper 5 are ignored).
+ _0 = _01;
+ _1 = _mm_srli_si128(_01, 6);
+ _2 = _23;
+ _3 = _mm_srli_si128(_23, 6);
+
+ // De-interlace to R,G,B.
+ auto _02 = _mm_unpacklo_epi16(_0, _2), // r0 r2 g0 g2 b0 b2 xx xx
+ _13 = _mm_unpacklo_epi16(_1, _3); // r1 r3 g1 g3 b1 b3 xx xx
+
+ auto R = _mm_unpacklo_epi16(_02, _13), // r0 r1 r2 r3 g0 g1 g2 g3
+ G = _mm_srli_si128(R, 8),
+ B = _mm_unpackhi_epi16(_02, _13); // b0 b1 b2 b3 xx xx xx xx
+
+ *r = sk_unaligned_load<U16>(&R);
+ *g = sk_unaligned_load<U16>(&G);
+ *b = sk_unaligned_load<U16>(&B);
+ }
+
+ SI void load4(const uint16_t* ptr, U16* r, U16* g, U16* b, U16* a) {
+ __m128i _01, _23;
+ _01 = _mm_loadu_si128(((__m128i*)ptr) + 0); // r0 g0 b0 a0 r1 g1 b1 a1
+ _23 = _mm_loadu_si128(((__m128i*)ptr) + 1); // r2 g2 b2 a2 r3 g3 b3 a3
+
+ auto _02 = _mm_unpacklo_epi16(_01, _23), // r0 r2 g0 g2 b0 b2 a0 a2
+ _13 = _mm_unpackhi_epi16(_01, _23); // r1 r3 g1 g3 b1 b3 a1 a3
+
+ auto rg = _mm_unpacklo_epi16(_02, _13), // r0 r1 r2 r3 g0 g1 g2 g3
+ ba = _mm_unpackhi_epi16(_02, _13); // b0 b1 b2 b3 a0 a1 a2 a3
+
+ *r = sk_unaligned_load<U16>((uint16_t*)&rg + 0);
+ *g = sk_unaligned_load<U16>((uint16_t*)&rg + 4);
+ *b = sk_unaligned_load<U16>((uint16_t*)&ba + 0);
+ *a = sk_unaligned_load<U16>((uint16_t*)&ba + 4);
+ }
+
+ SI void store4(uint16_t* ptr, U16 r, U16 g, U16 b, U16 a) {
+ auto rg = _mm_unpacklo_epi16(widen_cast<__m128i>(r), widen_cast<__m128i>(g)),
+ ba = _mm_unpacklo_epi16(widen_cast<__m128i>(b), widen_cast<__m128i>(a));
+
+ _mm_storeu_si128((__m128i*)ptr + 0, _mm_unpacklo_epi32(rg, ba));
+ _mm_storeu_si128((__m128i*)ptr + 1, _mm_unpackhi_epi32(rg, ba));
+ }
+
+ SI void load2(const float* ptr, F* r, F* g) {
+ F _01, _23;
+ _01 = _mm_loadu_ps(ptr + 0);
+ _23 = _mm_loadu_ps(ptr + 4);
+ *r = _mm_shuffle_ps(_01, _23, 0x88);
+ *g = _mm_shuffle_ps(_01, _23, 0xDD);
+ }
+
+ SI void store2(float* ptr, F r, F g) {
+ F _01 = _mm_unpacklo_ps(r, g),
+ _23 = _mm_unpackhi_ps(r, g);
+ _mm_storeu_ps(ptr + 0, _01);
+ _mm_storeu_ps(ptr + 4, _23);
+ }
+
+ SI void load4(const float* ptr, F* r, F* g, F* b, F* a) {
+ F _0, _1, _2, _3;
+ _0 = _mm_loadu_ps(ptr + 0);
+ _1 = _mm_loadu_ps(ptr + 4);
+ _2 = _mm_loadu_ps(ptr + 8);
+ _3 = _mm_loadu_ps(ptr +12);
+ _MM_TRANSPOSE4_PS(_0,_1,_2,_3);
+ *r = _0;
+ *g = _1;
+ *b = _2;
+ *a = _3;
+ }
+
+ SI void store4(float* ptr, F r, F g, F b, F a) {
+ _MM_TRANSPOSE4_PS(r,g,b,a);
+ _mm_storeu_ps(ptr + 0, r);
+ _mm_storeu_ps(ptr + 4, g);
+ _mm_storeu_ps(ptr + 8, b);
+ _mm_storeu_ps(ptr +12, a);
+ }
+
#elif defined(JUMPER_IS_NEON)
template <typename T> using V = Vec<4, T>;
using F = V<float >;
@@ -1004,6 +1185,15 @@ SI F from_half(U16 h) {
#elif defined(JUMPER_IS_HSW)
return _mm256_cvtph_ps((__m128i)h);
+// Disabled for now as this is not a particularly hot function
+// and there is no good reason to lock Chromium to POWER9+ yet.
+#elif 0 && defined(JUMPER_IS_VSX) && __has_builtin(__builtin_vsx_xvcvhpsp)
+ #if defined(SK_CPU_LENDIAN)
+ return __builtin_vsx_xvcvhpsp({h[0], 0, h[1], 0, h[2], 0, h[3], 0});
+ #else
+ return __builtin_vsx_xvcvhpsp({0, h[0], 0, h[1], 0, h[2], 0, h[3]});
+ #endif
+
#else
// Remember, a half is 1-5-10 (sign-exponent-mantissa) with 15 exponent bias.
U32 sem = expand(h),
@@ -1027,6 +1217,16 @@ SI U16 to_half(F f) {
#elif defined(JUMPER_IS_HSW)
return (U16)_mm256_cvtps_ph(f, _MM_FROUND_CUR_DIRECTION);
+// Disabled for now as this is not a particularly hot function
+// and there is no good reason to lock Chromium to POWER9+ yet.
+#elif 0 && defined(JUMPER_IS_VSX) && __has_builtin(__builtin_vsx_xvcvsphp)
+ __vector unsigned short v = __builtin_vsx_xvcvsphp(f);
+ #if defined(SK_CPU_LENDIAN)
+ return U16{v[0], v[2], v[4], v[6]};
+ #else
+ return U16{v[1], v[3], v[5], v[7]};
+ #endif
+
#else
// Remember, a float is 1-8-23 (sign-exponent-mantissa) with 127 exponent bias.
U32 sem = sk_bit_cast<U32>(f),
@@ -1102,7 +1302,7 @@ static constexpr size_t N = sizeof(F) /
// instead of {b,a} on the stack. Narrow stages work best for __vectorcall.
#define ABI __vectorcall
#define JUMPER_NARROW_STAGES 1
-#elif defined(__x86_64__) || defined(SK_CPU_ARM64)
+#elif defined(__x86_64__) || defined(SK_CPU_ARM64) || defined(SK_CPU_PPC64)
// These platforms are ideal for wider stages, and their default ABI is ideal.
#define ABI
#define JUMPER_NARROW_STAGES 0
@@ -4874,6 +5074,10 @@ SI F sqrt_(F x) {
float32x4_t lo,hi;
split(x, &lo,&hi);
return join<F>(sqrt(lo), sqrt(hi));
+#elif defined(JUMPER_IS_VSX)
+ vector float lo,hi;
+ split(x, &lo,&hi);
+ return join<F>(vec_sqrt(lo), vec_sqrt(hi));
#else
return F{
sqrtf(x[0]), sqrtf(x[1]), sqrtf(x[2]), sqrtf(x[3]),
@@ -4897,6 +5101,10 @@ SI F floor_(F x) {
__m128 lo,hi;
split(x, &lo,&hi);
return join<F>(_mm_floor_ps(lo), _mm_floor_ps(hi));
+#elif defined(JUMPER_IS_VSX)
+ vector float lo,hi;
+ split(x, &lo,&hi);
+ return join<F>(vec_floor(lo), vec_floor(hi));
#else
F roundtrip = cast<F>(cast<I32>(x));
return roundtrip - if_then_else(roundtrip > x, F_(1), F_(0));
@@ -4908,6 +5116,7 @@ SI F floor_(F x) {
// (2 * a * b + (1 << 15)) >> 16
// The result is a number on [-1, 1).
// Note: on neon this is a saturating multiply while the others are not.
+// Note: for POWER, the code below was borrowed from emmintrin.h
SI I16 scaled_mult(I16 a, I16 b) {
#if defined(JUMPER_IS_SKX)
return (I16)_mm256_mulhrs_epi16((__m256i)a, (__m256i)b);
@@ -4919,6 +5128,22 @@ SI I16 scaled_mult(I16 a, I16 b) {
return vqrdmulhq_s16(a, b);
#elif defined(JUMPER_IS_NEON)
return vqrdmulhq_s16(a, b);
+#elif defined(JUMPER_IS_VSX)
+ const vector unsigned int shift = vec_splats((unsigned int)14);
+ const vector int ones = vec_splats((signed int)1);
+ vector int c = vec_unpackh((vector short)a);
+ vector int d = vec_unpackh((vector short)b);
+ vector int e = vec_unpackl((vector short)b);
+ c = vec_mul(c, d);
+ d = vec_unpackl((vector short)a);
+ d = vec_mul(d, e);
+ c = vec_sr(c, shift);
+ d = vec_sr(d, shift);
+ c = vec_add(c, ones);
+ c = vec_sr(c,(vector unsigned int)ones);
+ d = vec_add(d, ones);
+ d = vec_sr(d,(vector unsigned int)ones);
+ return vec_pack(c, d);
#else
const I32 roundingTerm = I32_(1 << 14);
return cast<I16>((cast<I32>(a) * cast<I32>(b) + roundingTerm) >> 15);
@@ -4940,7 +5165,26 @@ SI U16 constrained_add(I16 a, U16 b) {
SkASSERT(-ib <= ia && ia <= 65535 - ib);
}
#endif
+
+ // Technically, trying to add a signed and unsigned vector invokes undefined behavior
+ // Just because it sort of seems to work on Intel/ARM on Clang doesn't mean it works everywhere...
+ // FIXME: For added fun, the existing Skia unit tests do NOT properly test for issues in the
+ // lowp bilerp path. Investigate and write an appropriate test case...
+#if defined(JUMPER_IS_VSX)
+ // Most POWER compilers end up doing some kind of width promotion that causes memory corruption
+ // and/or incorrect results. This shows up as snow and general graphics corruption, especially
+ // noticeable when trying to display a PNG at less than 50% size (resize the browser window down
+ // until the artifacts appear).
+ // Take the (likely invisible) loss of precision, convert b to a signed int immediately, and do
+ // a proper saturated add here. This seems to fully resolve the issue for all test cases Raptor
+ // has seen so far...
+ // In half precision mode, this function expects both input arguments to have been divided by
+ // two prior to being called, and returns the output without being multiplied back up by two
+ return vec_adds(a, (I16)b);
+#else
+ // Hic Sunt Dragones!
return b + sk_bit_cast<U16>(a);
+#endif
}
SI F fract(F x) { return x - floor_(x); }
@@ -5798,8 +6042,14 @@ STAGE_GP(bilerp_clamp_8888, const SkRast
// 2^-8 * v = 2^-9 * (tx*(R - L) + (R + L))
// v = 1/2 * (tx*(R - L) + (R + L))
auto lerpX = [&](U16 left, U16 right) -> U16 {
+#if defined(JUMPER_IS_VSX)
+ // constrained_add() on POWER is run in half precision mode to avoid undefined behavior
+ I16 width = (I16)(right - left) << 6;
+ U16 middle = (right + left) << 6;
+#else
I16 width = (I16)(right - left) << 7;
U16 middle = (right + left) << 7;
+#endif
// The constrained_add is the most subtle part of lerp. The first term is on the interval
// [-1, 1), and the second term is on the interval is on the interval [0, 1) because
// both terms are too high by a factor of 2 which will be handled below. (Both R and L are
@@ -5811,7 +6061,12 @@ STAGE_GP(bilerp_clamp_8888, const SkRast
U16 v2 = constrained_add(scaled_mult(tx, width), middle) + 1;
// Divide by 2 to calculate v and at the same time bring the intermediate value onto the
// interval [0, 1/2] to set up for the lerpY.
+#if defined(JUMPER_IS_VSX)
+ // constrained_add() on POWER is run in half precision mode to avoid undefined behavior
+ return v2;
+#else
return v2 >> 1;
+#endif
};
const uint32_t* ptr;
@@ -5845,9 +6100,15 @@ STAGE_GP(bilerp_clamp_8888, const SkRast
I16 width = (I16)bottom - (I16)top;
U16 middle = bottom + top;
// Add + 0x80 for rounding.
+#if defined(JUMPER_IS_VSX)
+ // constrained_add() on POWER is run in half precision mode to avoid undefined behavior
+ U16 blend = constrained_add(scaled_mult(ty, width) / 2, middle / 2) + (0x80 / 2);
+ return blend >> 7;
+#else
U16 blend = constrained_add(scaled_mult(ty, width), middle) + 0x80;
-
return blend >> 8;
+#endif
+
};
r = lerpY(topR, bottomR);
Index: chromium-123.0.6312.58/third_party/skia/src/opts/SkSwizzler_opts.h
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/opts/SkSwizzler_opts.h
+++ chromium-123.0.6312.58/third_party/skia/src/opts/SkSwizzler_opts.h
@@ -17,7 +17,10 @@
#include <cmath>
#include <utility>
-#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE1
+#if defined(SK_PPC64_HAS_SSE_COMPAT)
+ #include <emmintrin.h>
+ #include <tmmintrin.h>
+#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE1
#include <immintrin.h>
#elif defined(SK_ARM_HAS_NEON)
#include <arm_neon.h>
@@ -43,6 +43,33 @@
static inline float SkReciprocalAlpha(float a) {
return SkReciprocalAlpha_portable(a);
}
+#elif defined(SK_PPC64_HAS_SSE_COMPAT)
+// -- VSX -- Harden against timing attacks
+SK_NO_SANITIZE("float-divide-by-zero")
+static inline float SkReciprocalAlphaTimes255(float a) {
+ SkASSERT(0 <= a && a <= 255);
+
+ vector float vA{a,a,a,a};
+ vector float vB{255.0f,255.0f,255.0f,255.0f};
+ vector float vC{0.0f,0.0f,0.0f,0.0f};
+ vector float q = vec_div(vB, vA);
+ vector float vCmp{static_cast<float>(vA != vC)};
+
+ return vec_and(vCmp, q)[0];
+}
+
+SK_NO_SANITIZE("float-divide-by-zero")
+static inline float SkReciprocalAlpha(float a) {
+ SkASSERT(0 <= a && a <= 1);
+
+ vector float vA{a,a,a,a};
+ vector float vB{1.0f,1.0f,1.0f,1.0f};
+ vector float vC{0.0f,0.0f,0.0f,0.0f};
+ vector float q = vec_div(vB, vA);
+ vector float vCmp{static_cast<float>(vA != vC)};
+
+ return vec_and(vCmp, q)[0];
+}
#elif SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE1 && (defined(__clang__) || !defined(_MSC_VER))
// -- SSE -- Harden against timing attacks -- MSVC is not supported.
using F4 = __m128;
Index: chromium-123.0.6312.58/third_party/skia/src/base/SkVx.h
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/base/SkVx.h
+++ chromium-123.0.6312.58/third_party/skia/src/base/SkVx.h
@@ -42,7 +42,13 @@
#if SKVX_USE_SIMD
#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE1
- #include <immintrin.h>
+ #if __PPC64__
+ #include <mmintrin.h>
+ #include <emmintrin.h>
+ #include <tmmintrin.h>
+ #else
+ #include <immintrin.h>
+ #endif
#elif defined(SK_ARM_HAS_NEON)
#include <arm_neon.h>
#elif defined(__wasm_simd128__)
Index: chromium-123.0.6312.58/third_party/skia/src/core/SkBlitMask_opts_ssse3.cpp
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/core/SkBlitMask_opts_ssse3.cpp
+++ chromium-123.0.6312.58/third_party/skia/src/core/SkBlitMask_opts_ssse3.cpp
@@ -9,7 +9,7 @@
#include "src/core/SkBlitMask.h"
#include "src/core/SkOptsTargets.h"
-#if defined(SK_CPU_X86) && !defined(SK_ENABLE_OPTIMIZE_SIZE)
+#if (defined(SK_CPU_X86) || defined(SK_CPU_PPC64)) && !defined(SK_ENABLE_OPTIMIZE_SIZE)
// The order of these includes is important:
// 1) Select the target CPU architecture by defining SK_OPTS_TARGET and including SkOpts_SetTarget
Index: chromium-123.0.6312.58/third_party/skia/src/core/SkSwizzler_opts_ssse3.cpp
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/core/SkSwizzler_opts_ssse3.cpp
+++ chromium-123.0.6312.58/third_party/skia/src/core/SkSwizzler_opts_ssse3.cpp
@@ -11,7 +11,7 @@
#include "src/core/SkOptsTargets.h"
#include "src/core/SkSwizzlePriv.h"
-#if defined(SK_CPU_X86) && !defined(SK_ENABLE_OPTIMIZE_SIZE)
+#if (defined(SK_CPU_X86) || defined(SK_CPU_PPC64)) && !defined(SK_ENABLE_OPTIMIZE_SIZE)
// The order of these includes is important:
// 1) Select the target CPU architecture by defining SK_OPTS_TARGET and including SkOpts_SetTarget
Index: chromium-123.0.6312.58/third_party/skia/src/core/SkBlitMask_opts.cpp
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/core/SkBlitMask_opts.cpp
+++ chromium-123.0.6312.58/third_party/skia/src/core/SkBlitMask_opts.cpp
@@ -25,7 +25,7 @@ namespace SkOpts {
static bool init() {
#if defined(SK_ENABLE_OPTIMIZE_SIZE)
// All Init_foo functions are omitted when optimizing for size
- #elif defined(SK_CPU_X86)
+ #elif defined(SK_CPU_X86) || defined(SK_CPU_PPC64)
#if SK_CPU_SSE_LEVEL < SK_CPU_SSE_LEVEL_SSSE3
if (SkCpu::Supports(SkCpu::SSSE3)) { Init_BlitMask_ssse3(); }
#endif
Index: chromium-123.0.6312.58/third_party/skia/src/core/SkBitmapProcState_opts.cpp
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/core/SkBitmapProcState_opts.cpp
+++ chromium-123.0.6312.58/third_party/skia/src/core/SkBitmapProcState_opts.cpp
@@ -25,7 +25,7 @@ namespace SkOpts {
static bool init() {
#if defined(SK_ENABLE_OPTIMIZE_SIZE)
// All Init_foo functions are omitted when optimizing for size
- #elif defined(SK_CPU_X86)
+ #elif defined(SK_CPU_X86) || defined(SK_CPU_PPC64)
#if SK_CPU_SSE_LEVEL < SK_CPU_SSE_LEVEL_SSSE3
if (SkCpu::Supports(SkCpu::SSSE3)) { Init_BitmapProcState_ssse3(); }
#endif
Index: chromium-123.0.6312.58/third_party/skia/src/core/SkCpu.h
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/core/SkCpu.h
+++ chromium-123.0.6312.58/third_party/skia/src/core/SkCpu.h
@@ -55,7 +55,7 @@ inline bool SkCpu::Supports(uint32_t mas
// If we mask in compile-time known lower limits, the compiler can
// often compile away this entire function.
-#if SK_CPU_X86
+#if SK_CPU_X86 || defined(SK_CPU_PPC64)
#if SK_CPU_SSE_LEVEL >= SK_CPU_SSE_LEVEL_SSE1
features |= SSE1;
#endif
Index: chromium-123.0.6312.58/third_party/skia/src/core/SkBitmapProcState_opts_ssse3.cpp
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/src/core/SkBitmapProcState_opts_ssse3.cpp
+++ chromium-123.0.6312.58/third_party/skia/src/core/SkBitmapProcState_opts_ssse3.cpp
@@ -8,7 +8,7 @@
#include "include/private/base/SkFeatures.h"
#include "src/core/SkOptsTargets.h"
-#if defined(SK_CPU_X86) && !defined(SK_ENABLE_OPTIMIZE_SIZE)
+#if (defined(SK_CPU_X86) || defined(SK_CPU_PPC64)) && !defined(SK_ENABLE_OPTIMIZE_SIZE)
// The order of these includes is important:
// 1) Select the target CPU architecture by defining SK_OPTS_TARGET and including SkOpts_SetTarget
Index: chromium-123.0.6312.58/third_party/skia/include/private/base/SkFeatures.h
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/include/private/base/SkFeatures.h
+++ chromium-123.0.6312.58/third_party/skia/include/private/base/SkFeatures.h
@@ -63,6 +63,8 @@
#if defined(__i386) || defined(_M_IX86) || defined(__x86_64__) || defined(_M_X64)
#define SK_CPU_X86 1
+#elif defined(__powerpc64__) || defined(__PPC64__)
+ #define SK_CPU_PPC64 1
#endif
/**
Index: chromium-123.0.6312.58/third_party/skia/modules/skcms/src/skcms_internals.h
===================================================================
--- chromium-123.0.6312.58.orig/third_party/skia/modules/skcms/src/skcms_internals.h
+++ chromium-123.0.6312.58/third_party/skia/modules/skcms/src/skcms_internals.h
@@ -46,6 +46,7 @@ extern "C" {
&& !defined(__EMSCRIPTEN__) \
&& !defined(__arm__) \
&& !defined(__riscv) \
+ && !defined(__powerpc64__) \
&& !defined(_WIN32) && !defined(__SYMBIAN32__)
#define SKCMS_HAS_MUSTTAIL 1
#endif
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