commit e8d2c072bc6cc3bf64a82e023474c2ceba167987
author Olli Etuaho <oetuaho@nvidia.com> Thu Jan 08 16:33:54 2015 +0200
committer Olli Etuaho <oetuaho@nvidia.com> Thu Jan 08 17:35:16 2015 +0000
tree ef93e1ce27352a612cb0403920a7e14bf946fce2
parent d2cf3ad3ae90d33d69caad0253e1c754e4d6aebe

Implement float-integer conversions for ESSL 3.00

The implementation uses asint, asuint and asfloat in the HLSL output.

BUG=angle:865

Change-Id: I6b48298e18c7b3b0bdeac522b375ebc4eab7cf4e
Reviewed-on: https://chromium-review.googlesource.com/239520
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Tested-by: Olli Etuaho <oetuaho@nvidia.com>

src/compiler/translator/Initialize.cpp

diff --git a/src/compiler/translator/Initialize.cpp b/src/compiler/translator/Initialize.cpp
index 043a251..93a2483 100644
--- a/src/compiler/translator/Initialize.cpp
+++ b/src/compiler/translator/Initialize.cpp
@@ -197,6 +197,31 @@
     symbolTable.insertBuiltIn(COMMON_BUILTINS, float3, "smoothstep", float1, float1, float3);
     symbolTable.insertBuiltIn(COMMON_BUILTINS, float4, "smoothstep", float1, float1, float4);
 
+    TType *uint1 = new TType(EbtUInt);
+    TType *uint2 = new TType(EbtUInt, 2);
+    TType *uint3 = new TType(EbtUInt, 3);
+    TType *uint4 = new TType(EbtUInt, 4);
+
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, int1, "floatBitsToInt", float1);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, int2, "floatBitsToInt", float2);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, int3, "floatBitsToInt", float3);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, int4, "floatBitsToInt", float4);
+
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, uint1, "floatBitsToUint", float1);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, uint2, "floatBitsToUint", float2);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, uint3, "floatBitsToUint", float3);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, uint4, "floatBitsToUint", float4);
+
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "intBitsToFloat", int1);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, float2, "intBitsToFloat", int2);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, float3, "intBitsToFloat", int3);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, float4, "intBitsToFloat", int4);
+
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, float1, "uintBitsToFloat", uint1);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, float2, "uintBitsToFloat", uint2);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, float3, "uintBitsToFloat", uint3);
+    symbolTable.insertBuiltIn(ESSL3_BUILTINS, float4, "uintBitsToFloat", uint4);
+
     //
     // Geometric Functions.
     //
@@ -693,6 +718,11 @@
     symbolTable.relateToOperator(COMMON_BUILTINS, "step",         EOpStep);
     symbolTable.relateToOperator(COMMON_BUILTINS, "smoothstep",   EOpSmoothStep);
 
+    symbolTable.relateToOperator(ESSL3_BUILTINS, "floatBitsToInt",  EOpFloatBitsToInt);
+    symbolTable.relateToOperator(ESSL3_BUILTINS, "floatBitsToUint", EOpFloatBitsToUint);
+    symbolTable.relateToOperator(ESSL3_BUILTINS, "intBitsToFloat",  EOpIntBitsToFloat);
+    symbolTable.relateToOperator(ESSL3_BUILTINS, "uintBitsToFloat", EOpUintBitsToFloat);
+
     symbolTable.relateToOperator(COMMON_BUILTINS, "length",       EOpLength);
     symbolTable.relateToOperator(COMMON_BUILTINS, "distance",     EOpDistance);
     symbolTable.relateToOperator(COMMON_BUILTINS, "dot",          EOpDot);