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Hash : 2d73665d
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Date : 2016-11-30T10:37:49
Handle constant folding arithmetic involving infinity Constant folding arithmetic operations that involve infinity are now handled correctly in the cases where the result is infinity or zero. The implementation mostly relies on C++ to implement IEEE float arithmetic correctly so that unnecessary overhead is avoided. Constant folding arithmetic operations that result in overflow now issue a warning but result in infinity. This is not mandated by the spec but is a reasonable choice since it is the behavior of the default IEEE rounding mode. Constant folding arithmetic operations that result in NaN in IEEE will generate a warning but the NaN is kept. This is also not mandated by the spec, but is among the allowed behaviors. There's no special handling for ESSL 1.00. ESSL 1.00 doesn't really have the concept of NaN, but since it is not feasible to control generating NaNs at shader run time either way, it should not be a big issue if constant folding may generate them as well. TEST=angle_unittests BUG=chromium:661857 Change-Id: I06116c6fdd02f224939d4a651e4e62f2fd4c98a8 Reviewed-on: https://chromium-review.googlesource.com/414911 Reviewed-by: Corentin Wallez <cwallez@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
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Files
- API_test.cpp
- CollectVariables_test.cpp
- ConstantFoldingNaN_test.cpp
- ConstantFoldingOverflow_test.cpp
- ConstantFolding_test.cpp
- ConstructCompiler_test.cpp
- DebugShaderPrecision_test.cpp
- EXT_blend_func_extended_test.cpp
- EmulateGLFragColorBroadcast_test.cpp
- ExpressionLimit_test.cpp
- FloatLex_test.cpp
- FragDepth_test.cpp
- GLSLCompatibilityOutput_test.cpp
- IntermNode_test.cpp
- MalformedShader_test.cpp
- NV_draw_buffers_test.cpp
- Pack_Unpack_test.cpp
- PruneEmptyDeclarations_test.cpp
- PruneUnusedFunctions_test.cpp
- QualificationOrderESSL31_test.cpp
- QualificationOrder_test.cpp
- RecordConstantPrecision_test.cpp
- RemovePow_test.cpp
- ShCompile_test.cpp
- ShaderExtension_test.cpp
- ShaderImage_test.cpp
- ShaderVariable_test.cpp
- TypeTracking_test.cpp
- UnrollFlatten_test.cpp
- VariablePacker_test.cpp
- WorkGroupSize_test.cpp
