From 553e672777433c99afb0376b963aa5955e4c076f Mon Sep 17 00:00:00 2001 From: Yuri Kunde Schlesner Date: Wed, 8 Feb 2017 23:46:00 -0800 Subject: VideoCore: Split u64 Pica reg unions into 2 separate u32 unions This eliminates UB when aliasing it with the array of u32 regs, and is compatible with non-LE architectures. --- src/video_core/regs_pipeline.h | 78 +++++++++++++++++++++++------------------- 1 file changed, 42 insertions(+), 36 deletions(-) (limited to 'src/video_core') diff --git a/src/video_core/regs_pipeline.h b/src/video_core/regs_pipeline.h index 5844a66ee..0a4ec6e1e 100644 --- a/src/video_core/regs_pipeline.h +++ b/src/video_core/regs_pipeline.h @@ -14,7 +14,7 @@ namespace Pica { struct PipelineRegs { - enum class VertexAttributeFormat : u64 { + enum class VertexAttributeFormat : u32 { BYTE = 0, UBYTE = 1, SHORT = 2, @@ -31,34 +31,37 @@ struct PipelineRegs { // Descriptor for internal vertex attributes union { BitField<0, 2, VertexAttributeFormat> format0; // size of one element - BitField<2, 2, u64> size0; // number of elements minus 1 + BitField<2, 2, u32> size0; // number of elements minus 1 BitField<4, 2, VertexAttributeFormat> format1; - BitField<6, 2, u64> size1; + BitField<6, 2, u32> size1; BitField<8, 2, VertexAttributeFormat> format2; - BitField<10, 2, u64> size2; + BitField<10, 2, u32> size2; BitField<12, 2, VertexAttributeFormat> format3; - BitField<14, 2, u64> size3; + BitField<14, 2, u32> size3; BitField<16, 2, VertexAttributeFormat> format4; - BitField<18, 2, u64> size4; + BitField<18, 2, u32> size4; BitField<20, 2, VertexAttributeFormat> format5; - BitField<22, 2, u64> size5; + BitField<22, 2, u32> size5; BitField<24, 2, VertexAttributeFormat> format6; - BitField<26, 2, u64> size6; + BitField<26, 2, u32> size6; BitField<28, 2, VertexAttributeFormat> format7; - BitField<30, 2, u64> size7; - BitField<32, 2, VertexAttributeFormat> format8; - BitField<34, 2, u64> size8; - BitField<36, 2, VertexAttributeFormat> format9; - BitField<38, 2, u64> size9; - BitField<40, 2, VertexAttributeFormat> format10; - BitField<42, 2, u64> size10; - BitField<44, 2, VertexAttributeFormat> format11; - BitField<46, 2, u64> size11; - - BitField<48, 12, u64> attribute_mask; + BitField<30, 2, u32> size7; + }; + + union { + BitField<0, 2, VertexAttributeFormat> format8; + BitField<2, 2, u32> size8; + BitField<4, 2, VertexAttributeFormat> format9; + BitField<6, 2, u32> size9; + BitField<8, 2, VertexAttributeFormat> format10; + BitField<10, 2, u32> size10; + BitField<12, 2, VertexAttributeFormat> format11; + BitField<14, 2, u32> size11; + + BitField<16, 12, u32> attribute_mask; // number of total attributes minus 1 - BitField<60, 4, u64> max_attribute_index; + BitField<28, 4, u32> max_attribute_index; }; inline VertexAttributeFormat GetFormat(int n) const { @@ -69,7 +72,7 @@ struct PipelineRegs { } inline int GetNumElements(int n) const { - u64 sizes[] = {size0, size1, size2, size3, size4, size5, + u32 sizes[] = {size0, size1, size2, size3, size4, size5, size6, size7, size8, size9, size10, size11}; return (int)sizes[n] + 1; } @@ -99,27 +102,30 @@ struct PipelineRegs { u32 data_offset; union { - BitField<0, 4, u64> comp0; - BitField<4, 4, u64> comp1; - BitField<8, 4, u64> comp2; - BitField<12, 4, u64> comp3; - BitField<16, 4, u64> comp4; - BitField<20, 4, u64> comp5; - BitField<24, 4, u64> comp6; - BitField<28, 4, u64> comp7; - BitField<32, 4, u64> comp8; - BitField<36, 4, u64> comp9; - BitField<40, 4, u64> comp10; - BitField<44, 4, u64> comp11; + BitField<0, 4, u32> comp0; + BitField<4, 4, u32> comp1; + BitField<8, 4, u32> comp2; + BitField<12, 4, u32> comp3; + BitField<16, 4, u32> comp4; + BitField<20, 4, u32> comp5; + BitField<24, 4, u32> comp6; + BitField<28, 4, u32> comp7; + }; + + union { + BitField<0, 4, u32> comp8; + BitField<4, 4, u32> comp9; + BitField<8, 4, u32> comp10; + BitField<12, 4, u32> comp11; // bytes for a single vertex in this loader - BitField<48, 8, u64> byte_count; + BitField<16, 8, u32> byte_count; - BitField<60, 4, u64> component_count; + BitField<28, 4, u32> component_count; }; inline int GetComponent(int n) const { - u64 components[] = {comp0, comp1, comp2, comp3, comp4, comp5, + u32 components[] = {comp0, comp1, comp2, comp3, comp4, comp5, comp6, comp7, comp8, comp9, comp10, comp11}; return (int)components[n]; } -- cgit v1.2.3