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-rw-r--r--gfx/angle/checkout/src/compiler/translator/BuiltInFunctionEmulatorHLSL.cpp173
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
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