| // |
| // 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 |
