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GPU: Corrected the branch targets for the shader bra instruction.

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This commit is contained in:
Subv 2018-06-04 22:56:28 -05:00
parent 8c99dd055c
commit e7dfcdde74
1 changed files with 5 additions and 4 deletions
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9
src/video_core/engines/shader_bytecode.h
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@ -328,15 +328,16 @@ union Instruction {
} texs;
union {
BitField<20, 5, u64> target;
BitField<20, 24, u64> target;
BitField<5, 1, u64> constant_buffer;
s32 GetBranchTarget() const {
// Sign extend the branch target offset
u32 mask = 1U << (5 - 1);
u32 mask = 1U << (24 - 1);
u32 value = static_cast<u32>(target);
// The branch offset is relative to the next instruction, so add 1 to it.
return static_cast<s32>((value ^ mask) - mask) + 1;
// The branch offset is relative to the next instruction and is stored in bytes, so
// divide it by the size of an instruction and add 1 to it.
return static_cast<s32>((value ^ mask) - mask) / sizeof(Instruction) + 1;
}
} bra;