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shader: Calculate number of arguments in an opcode at compile time

master
ReinUsesLisp 2021-04-20 22:20:46 +07:00 committed by ameerj
parent dd860b684c
commit 79c2e43fcd
1 changed files with 12 additions and 3 deletions
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15
src/shader_recompiler/frontend/ir/opcodes.cpp
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@ -57,6 +57,17 @@ constexpr std::array META_TABLE{
#undef OPCODE
};
constexpr size_t CalculateNumArgsOf(Opcode op) {
const auto& arg_types{META_TABLE[static_cast<size_t>(op)].arg_types};
return std::distance(arg_types.begin(), std::ranges::find(arg_types, Type::Void));
}
constexpr std::array NUM_ARGS{
#define OPCODE(name_token, type_token, ...) CalculateNumArgsOf(Opcode::name_token),
#include "opcodes.inc"
#undef OPCODE
};
void ValidateOpcode(Opcode op) {
const size_t raw{static_cast<size_t>(op)};
if (raw >= META_TABLE.size()) {
@ -72,9 +83,7 @@ Type TypeOf(Opcode op) {
size_t NumArgsOf(Opcode op) {
ValidateOpcode(op);
const auto& arg_types{META_TABLE[static_cast<size_t>(op)].arg_types};
const auto distance{std::distance(arg_types.begin(), std::ranges::find(arg_types, Type::Void))};
return static_cast<size_t>(distance);
return NUM_ARGS[static_cast<size_t>(op)];
}
Type ArgTypeOf(Opcode op, size_t arg_index) {