5f16ed4c58
MSL does not support the unary "-" operator on matrix types. Similarly the SPIR-V OpFNegate/OpSNegate operations only work on scalar and vector type. * An expression such as "-<mat>" is now transformed to "-1.0 * <mat>" when generating MSL. * The same expression now generates a component-wise negation in SPIR-V, matching what glslang outputs for GLSL. * A unary "+" is now treated as NOP for MSL, matching the SPIR-V backend. An expression such as "+<expr>" is now evaluated as "<expr>". * The shared/Negation.sksl has been moved to folding/ as much of its contents exercise constant-folding of comparison expressions. * The shared/UnaryPositiveNegative.sksl test has been extended to exercise scalar and matrix types. NOTE: The SPIR-V backend changes have caused a minor re-ordering of SSA IDs generated when writing out a prefix-expression. The affected gold files have been updated. Bug: skia:12627, skia:12992 Change-Id: Iec5cdafc591aed7e49b3b52bda42a02661380bab Reviewed-on: https://skia-review.googlesource.com/c/skia/+/513976 Auto-Submit: Arman Uguray <armansito@google.com> Reviewed-by: John Stiles <johnstiles@google.com> Commit-Queue: Arman Uguray <armansito@google.com>
27 lines
758 B
JavaScript
27 lines
758 B
JavaScript
OpCapability Shader
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%1 = OpExtInstImport "GLSL.std.450"
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OpMemoryModel Logical GLSL450
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OpEntryPoint Fragment %main "main" %sk_Clockwise
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OpExecutionMode %main OriginUpperLeft
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OpName %sk_Clockwise "sk_Clockwise"
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OpName %main "main"
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OpName %x "x"
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OpDecorate %sk_Clockwise BuiltIn FrontFacing
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%bool = OpTypeBool
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%_ptr_Input_bool = OpTypePointer Input %bool
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%sk_Clockwise = OpVariable %_ptr_Input_bool Input
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%void = OpTypeVoid
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%7 = OpTypeFunction %void
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%uint = OpTypeInt 32 0
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%_ptr_Function_uint = OpTypePointer Function %uint
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%uint_1 = OpConstant %uint 1
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%main = OpFunction %void None %7
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%8 = OpLabel
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%x = OpVariable %_ptr_Function_uint Function
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%13 = OpLoad %uint %x
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%14 = OpIAdd %uint %13 %uint_1
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OpStore %x %14
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%15 = OpSNegate %uint %14
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OpReturn
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OpFunctionEnd
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