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oaknut: Avoid negation of unsigned values

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This commit is contained in:
Merry 2023-10-09 21:47:33 +01:00
parent b4ac8fd6c1
commit ff4456ecab
4 changed files with 11 additions and 11 deletions
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2
include/oaknut/impl/arm64_encode_helpers.inc.hpp
View file

@ -8,7 +8,7 @@ static constexpr std::uint32_t pdep(std::uint32_t val)
std::uint32_t res = 0;
for (std::uint32_t bb = 1; mask; bb += bb) {
if (val & bb)
res |= mask & -mask;
res |= mask & (~mask + 1);
mask &= mask - 1;
}
return res;

12
include/oaknut/impl/mnemonics_generic_v8.0.inc.hpp
View file

@ -167,13 +167,13 @@ void BFI(WReg wd, WReg wn, Imm<5> lsb, Imm<5> width)
{
if (width.value() == 0 || width.value() > (32 - lsb.value()))
throw OaknutException{ExceptionType::InvalidBitWidth};
emit<"0011001100rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(wd, wn, (-lsb.value()) & 31, width.value() - 1);
emit<"0011001100rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(wd, wn, (~lsb.value() + 1) & 31, width.value() - 1);
}
void BFI(XReg xd, XReg xn, Imm<6> lsb, Imm<6> width)
{
if (width.value() == 0 || width.value() > (64 - lsb.value()))
throw OaknutException{ExceptionType::InvalidBitWidth};
emit<"1011001101rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(xd, xn, (-lsb.value()) & 63, width.value() - 1);
emit<"1011001101rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(xd, xn, (~lsb.value() + 1) & 63, width.value() - 1);
}
void BFM(WReg wd, WReg wn, Imm<5> immr, Imm<5> imms)
{
@ -1231,13 +1231,13 @@ void SBFIZ(WReg wd, WReg wn, Imm<5> lsb, Imm<5> width)
{
if (width.value() == 0 || width.value() > (32 - lsb.value()))
throw OaknutException{ExceptionType::InvalidBitWidth};
emit<"0001001100rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(wd, wn, (-lsb.value()) & 31, width.value() - 1);
emit<"0001001100rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(wd, wn, (~lsb.value() + 1) & 31, width.value() - 1);
}
void SBFIZ(XReg xd, XReg xn, Imm<6> lsb, Imm<6> width)
{
if (width.value() == 0 || width.value() > (64 - lsb.value()))
throw OaknutException{ExceptionType::InvalidBitWidth};
emit<"1001001101rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(xd, xn, (-lsb.value()) & 63, width.value() - 1);
emit<"1001001101rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(xd, xn, (~lsb.value() + 1) & 63, width.value() - 1);
}
void SBFM(WReg wd, WReg wn, Imm<5> immr, Imm<5> imms)
{
@ -1627,13 +1627,13 @@ void UBFIZ(WReg wd, WReg wn, Imm<5> lsb, Imm<5> width)
{
if (width.value() == 0 || width.value() > (32 - lsb.value()))
throw OaknutException{ExceptionType::InvalidBitWidth};
emit<"0101001100rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(wd, wn, (-lsb.value()) & 31, width.value() - 1);
emit<"0101001100rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(wd, wn, (~lsb.value() + 1) & 31, width.value() - 1);
}
void UBFIZ(XReg xd, XReg xn, Imm<6> lsb, Imm<6> width)
{
if (width.value() == 0 || width.value() > (64 - lsb.value()))
throw OaknutException{ExceptionType::InvalidBitWidth};
emit<"1101001101rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(xd, xn, (-lsb.value()) & 63, width.value() - 1);
emit<"1101001101rrrrrrssssssnnnnnddddd", "d", "n", "r", "s">(xd, xn, (~lsb.value() + 1) & 63, width.value() - 1);
}
void UBFM(WReg wd, WReg wn, Imm<5> immr, Imm<5> imms)
{

4
include/oaknut/impl/mnemonics_generic_v8.2.inc.hpp
View file

@ -5,13 +5,13 @@ void BFC(WReg wd, Imm<5> lsb, Imm<5> width)
{
if (width.value() == 0 || width.value() > (32 - lsb.value()))
throw OaknutException{ExceptionType::InvalidBitWidth};
emit<"0011001100rrrrrrssssss11111ddddd", "d", "r", "s">(wd, (-lsb.value()) & 31, width.value() - 1);
emit<"0011001100rrrrrrssssss11111ddddd", "d", "r", "s">(wd, (~lsb.value() + 1) & 31, width.value() - 1);
}
void BFC(XReg xd, Imm<6> lsb, Imm<6> width)
{
if (width.value() == 0 || width.value() > (64 - lsb.value()))
throw OaknutException{ExceptionType::InvalidBitWidth};
emit<"1011001101rrrrrrssssss11111ddddd", "d", "r", "s">(xd, (-lsb.value()) & 63, width.value() - 1);
emit<"1011001101rrrrrrssssss11111ddddd", "d", "r", "s">(xd, (~lsb.value() + 1) & 63, width.value() - 1);
}
void ESB()
{

4
include/oaknut/oaknut.hpp
View file

@ -110,8 +110,8 @@ public:
return;
if (MovImm16::is_valid(imm))
return MOVZ(wd, imm);
if (MovImm16::is_valid(~static_cast<std::uint64_t>(imm)))
return MOVN(wd, ~static_cast<std::uint64_t>(imm));
if (MovImm16::is_valid(static_cast<std::uint32_t>(~imm)))
return MOVN(wd, static_cast<std::uint32_t>(~imm));
if (detail::encode_bit_imm(imm))
return ORR(wd, WzrReg{}, imm);