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decoder_detail: Mark GetMaskAndExpect() as constexpr

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Elides quite a bit of code at runtime when constructing the decoding
tables.
This commit is contained in:
Lioncash 2020-05-10 20:45:56 -04:00 committed by merry
parent 59db2c191a
commit af3b65b135
1 changed files with 1 additions and 1 deletions
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src/frontend/decoder/decoder_detail.h
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@ -35,7 +35,7 @@ private:
* A '0' in a bitstring indicates that a zero must be present at that bit position. * A '0' in a bitstring indicates that a zero must be present at that bit position.
* A '1' in a bitstring indicates that a one must be present at that bit position. * A '1' in a bitstring indicates that a one must be present at that bit position.
*/ */
static auto GetMaskAndExpect(const char* const bitstring) { static constexpr auto GetMaskAndExpect(const char* const bitstring) {
const auto one = static_cast<opcode_type>(1); const auto one = static_cast<opcode_type>(1);
opcode_type mask = 0, expect = 0; opcode_type mask = 0, expect = 0;
for (size_t i = 0; i < opcode_bitsize; i++) { for (size_t i = 0; i < opcode_bitsize; i++) {