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VideoCore: Split u64 Pica reg unions into 2 separate u32 unions

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This eliminates UB when aliasing it with the array of u32 regs, and
is compatible with non-LE architectures.
This commit is contained in:
Yuri Kunde Schlesner 2017-02-08 23:46:00 -08:00
parent bfb1531352
commit 553e672777
1 changed files with 41 additions and 35 deletions
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76
src/video_core/regs_pipeline.h
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@ -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<30, 2, u32> size7;
};
BitField<48, 12, u64> attribute_mask;
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];
}