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Fix is_zero_mask.

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Thomas Harte 2022-04-03 20:37:09 -04:00
parent 31276de5c3
commit 59a1fde2a1
1 changed files with 2 additions and 2 deletions
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InstructionSets/PowerPC/Instruction.hpp
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@ -59,9 +59,9 @@ enum class BranchOption: uint32_t {
/// @returns @c 0 if reg == 0; @c ~0 otherwise. /// @returns @c 0 if reg == 0; @c ~0 otherwise.
/// @discussion Provides a branchless way to substitute the value 0 for the value of r0 /// @discussion Provides a branchless way to substitute the value 0 for the value of r0
/// in affected instructions. /// in affected instructions. Assumes arithmetic shifts.
template <typename IntT> constexpr IntT is_zero_mask(uint32_t reg) { template <typename IntT> constexpr IntT is_zero_mask(uint32_t reg) {
return ~IntT((reg - 1) >> 5); return ~IntT((int(reg) - 1) >> 5);
} }
enum class Operation: uint8_t { enum class Operation: uint8_t {