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types: Add helpers for determining single and doubleword extension registers (#26)

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This commit is contained in:
Mat M
2016-09-07 07:08:35 -04:00
committed by Merry
parent 5bc9ce544f
commit 6e0f27a500
3 changed files with 32 additions and 20 deletions
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24
src/frontend/arm/types.h
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@@ -67,19 +67,29 @@ const char* RegToString(Reg reg);
const char* ExtRegToString(ExtReg reg);
std::string RegListToString(RegList reg_list);
constexpr bool IsSingleExtReg(ExtReg reg) {
return reg >= ExtReg::S0 && reg <= ExtReg::S31;
}
constexpr bool IsDoubleExtReg(ExtReg reg) {
return reg >= ExtReg::D0 && reg <= ExtReg::D31;
}
inline size_t RegNumber(Reg reg) {
ASSERT(reg != Reg::INVALID_REG);
return static_cast<size_t>(reg);
}
inline size_t RegNumber(ExtReg reg) {
if (reg >= ExtReg::S0 && reg <= ExtReg::S31) {
if (IsSingleExtReg(reg)) {
return static_cast<size_t>(reg) - static_cast<size_t>(ExtReg::S0);
} else if (reg >= ExtReg::D0 && reg <= ExtReg::D31) {
return static_cast<size_t>(reg) - static_cast<size_t>(ExtReg::D0);
} else {
ASSERT_MSG(false, "Invalid extended register");
}
if (IsDoubleExtReg(reg)) {
return static_cast<size_t>(reg) - static_cast<size_t>(ExtReg::D0);
}
ASSERT_MSG(false, "Invalid extended register");
}
inline Reg operator+(Reg reg, size_t number) {
@@ -94,8 +104,8 @@ inline Reg operator+(Reg reg, size_t number) {
inline ExtReg operator+(ExtReg reg, size_t number) {
ExtReg new_reg = static_cast<ExtReg>(static_cast<size_t>(reg) + number);
ASSERT((reg >= ExtReg::S0 && reg <= ExtReg::S31 && new_reg >= ExtReg::S0 && new_reg <= ExtReg::S31)
|| (reg >= ExtReg::D0 && reg <= ExtReg::D31 && new_reg >= ExtReg::D0 && new_reg <= ExtReg::D31));
ASSERT((IsSingleExtReg(reg) && IsSingleExtReg(new_reg)) ||
(IsDoubleExtReg(reg) && IsDoubleExtReg(new_reg)));
return new_reg;
}