diff options
Diffstat (limited to 'gfx/angle/checkout/src/compiler/translator/BuiltInFunctionEmulatorHLSL.cpp')
-rw-r--r-- | gfx/angle/checkout/src/compiler/translator/BuiltInFunctionEmulatorHLSL.cpp | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/compiler/translator/BuiltInFunctionEmulatorHLSL.cpp b/gfx/angle/checkout/src/compiler/translator/BuiltInFunctionEmulatorHLSL.cpp new file mode 100644 index 0000000000..66a0be39e7 --- /dev/null +++ b/gfx/angle/checkout/src/compiler/translator/BuiltInFunctionEmulatorHLSL.cpp @@ -0,0 +1,173 @@ +// +// Copyright 2014 The ANGLE Project Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +// + +#include "compiler/translator/BuiltInFunctionEmulatorHLSL.h" +#include "angle_gl.h" +#include "compiler/translator/BuiltInFunctionEmulator.h" +#include "compiler/translator/VersionGLSL.h" +#include "compiler/translator/tree_util/BuiltIn.h" + +namespace sh +{ + +// Defined in emulated_builtin_functions_hlsl_autogen.cpp. +const char *FindHLSLFunction(int uniqueId); + +void InitBuiltInIsnanFunctionEmulatorForHLSLWorkarounds(BuiltInFunctionEmulator *emu, + int targetGLSLVersion) +{ + if (targetGLSLVersion < GLSL_VERSION_130) + return; + + emu->addEmulatedFunction(BuiltInId::isnan_Float1, + "bool isnan_emu(float x)\n" + "{\n" + " return (x > 0.0 || x < 0.0) ? false : x != 0.0;\n" + "}\n" + "\n"); + + emu->addEmulatedFunction( + BuiltInId::isnan_Float2, + "bool2 isnan_emu(float2 x)\n" + "{\n" + " bool2 isnan;\n" + " for (int i = 0; i < 2; i++)\n" + " {\n" + " isnan[i] = (x[i] > 0.0 || x[i] < 0.0) ? false : x[i] != 0.0;\n" + " }\n" + " return isnan;\n" + "}\n"); + + emu->addEmulatedFunction( + BuiltInId::isnan_Float3, + "bool3 isnan_emu(float3 x)\n" + "{\n" + " bool3 isnan;\n" + " for (int i = 0; i < 3; i++)\n" + " {\n" + " isnan[i] = (x[i] > 0.0 || x[i] < 0.0) ? false : x[i] != 0.0;\n" + " }\n" + " return isnan;\n" + "}\n"); + + emu->addEmulatedFunction( + BuiltInId::isnan_Float4, + "bool4 isnan_emu(float4 x)\n" + "{\n" + " bool4 isnan;\n" + " for (int i = 0; i < 4; i++)\n" + " {\n" + " isnan[i] = (x[i] > 0.0 || x[i] < 0.0) ? false : x[i] != 0.0;\n" + " }\n" + " return isnan;\n" + "}\n"); +} + +void InitBuiltInFunctionEmulatorForHLSL(BuiltInFunctionEmulator *emu) +{ + emu->addFunctionMap(FindHLSLFunction); + + // (a + b2^16) * (c + d2^16) = ac + (ad + bc) * 2^16 + bd * 2^32 + // Also note that below, a * d + ((a * c) >> 16) is guaranteed not to overflow, because: + // a <= 0xffff, d <= 0xffff, ((a * c) >> 16) <= 0xffff and 0xffff * 0xffff + 0xffff = 0xffff0000 + emu->addEmulatedFunction(BuiltInId::umulExtended_UInt1_UInt1_UInt1_UInt1, + "void umulExtended_emu(uint x, uint y, out uint msb, out uint lsb)\n" + "{\n" + " lsb = x * y;\n" + " uint a = (x & 0xffffu);\n" + " uint b = (x >> 16);\n" + " uint c = (y & 0xffffu);\n" + " uint d = (y >> 16);\n" + " uint ad = a * d + ((a * c) >> 16);\n" + " uint bc = b * c;\n" + " uint carry = uint(ad > (0xffffffffu - bc));\n" + " msb = ((ad + bc) >> 16) + (carry << 16) + b * d;\n" + "}\n"); + emu->addEmulatedFunctionWithDependency( + BuiltInId::umulExtended_UInt1_UInt1_UInt1_UInt1, + BuiltInId::umulExtended_UInt2_UInt2_UInt2_UInt2, + "void umulExtended_emu(uint2 x, uint2 y, out uint2 msb, out uint2 lsb)\n" + "{\n" + " umulExtended_emu(x.x, y.x, msb.x, lsb.x);\n" + " umulExtended_emu(x.y, y.y, msb.y, lsb.y);\n" + "}\n"); + emu->addEmulatedFunctionWithDependency( + BuiltInId::umulExtended_UInt1_UInt1_UInt1_UInt1, + BuiltInId::umulExtended_UInt3_UInt3_UInt3_UInt3, + "void umulExtended_emu(uint3 x, uint3 y, out uint3 msb, out uint3 lsb)\n" + "{\n" + " umulExtended_emu(x.x, y.x, msb.x, lsb.x);\n" + " umulExtended_emu(x.y, y.y, msb.y, lsb.y);\n" + " umulExtended_emu(x.z, y.z, msb.z, lsb.z);\n" + "}\n"); + emu->addEmulatedFunctionWithDependency( + BuiltInId::umulExtended_UInt1_UInt1_UInt1_UInt1, + BuiltInId::umulExtended_UInt4_UInt4_UInt4_UInt4, + "void umulExtended_emu(uint4 x, uint4 y, out uint4 msb, out uint4 lsb)\n" + "{\n" + " umulExtended_emu(x.x, y.x, msb.x, lsb.x);\n" + " umulExtended_emu(x.y, y.y, msb.y, lsb.y);\n" + " umulExtended_emu(x.z, y.z, msb.z, lsb.z);\n" + " umulExtended_emu(x.w, y.w, msb.w, lsb.w);\n" + "}\n"); + + // The imul emulation does two's complement negation on the lsb and msb manually in case the + // result needs to be negative. + // TODO(oetuaho): Note that this code doesn't take one edge case into account, where x or y is + // -2^31. abs(-2^31) is undefined. + emu->addEmulatedFunctionWithDependency( + BuiltInId::umulExtended_UInt1_UInt1_UInt1_UInt1, + BuiltInId::imulExtended_Int1_Int1_Int1_Int1, + "void imulExtended_emu(int x, int y, out int msb, out int lsb)\n" + "{\n" + " uint unsignedMsb;\n" + " uint unsignedLsb;\n" + " bool negative = (x < 0) != (y < 0);\n" + " umulExtended_emu(uint(abs(x)), uint(abs(y)), unsignedMsb, unsignedLsb);\n" + " lsb = asint(unsignedLsb);\n" + " msb = asint(unsignedMsb);\n" + " if (negative)\n" + " {\n" + " lsb = ~lsb;\n" + " msb = ~msb;\n" + " if (lsb == 0xffffffff)\n" + " {\n" + " lsb = 0;\n" + " msb += 1;\n" + " }\n" + " else\n" + " {\n" + " lsb += 1;\n" + " }\n" + " }\n" + "}\n"); + emu->addEmulatedFunctionWithDependency( + BuiltInId::imulExtended_Int1_Int1_Int1_Int1, BuiltInId::imulExtended_Int2_Int2_Int2_Int2, + "void imulExtended_emu(int2 x, int2 y, out int2 msb, out int2 lsb)\n" + "{\n" + " imulExtended_emu(x.x, y.x, msb.x, lsb.x);\n" + " imulExtended_emu(x.y, y.y, msb.y, lsb.y);\n" + "}\n"); + emu->addEmulatedFunctionWithDependency( + BuiltInId::imulExtended_Int1_Int1_Int1_Int1, BuiltInId::imulExtended_Int3_Int3_Int3_Int3, + "void imulExtended_emu(int3 x, int3 y, out int3 msb, out int3 lsb)\n" + "{\n" + " imulExtended_emu(x.x, y.x, msb.x, lsb.x);\n" + " imulExtended_emu(x.y, y.y, msb.y, lsb.y);\n" + " imulExtended_emu(x.z, y.z, msb.z, lsb.z);\n" + "}\n"); + emu->addEmulatedFunctionWithDependency( + BuiltInId::imulExtended_Int1_Int1_Int1_Int1, BuiltInId::imulExtended_Int4_Int4_Int4_Int4, + "void imulExtended_emu(int4 x, int4 y, out int4 msb, out int4 lsb)\n" + "{\n" + " imulExtended_emu(x.x, y.x, msb.x, lsb.x);\n" + " imulExtended_emu(x.y, y.y, msb.y, lsb.y);\n" + " imulExtended_emu(x.z, y.z, msb.z, lsb.z);\n" + " imulExtended_emu(x.w, y.w, msb.w, lsb.w);\n" + "}\n"); +} + +} // namespace sh |