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LibJIT: Add floating-point registers

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Co-authored-by: Stephan Vedder <vedder@mbits.info>
This commit is contained in:
Simon Wanner 2023-11-10 09:00:00 +01:00 • committed by Andreas Kling
parent 5557f05bb5
commit a698c51a5b
1 changed files with 50 additions and 6 deletions
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56
Userland/Libraries/LibJIT/X86_64/Assembler.h
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@ -36,11 +36,28 @@ struct X86_64Assembler {
R13 = 13,
R14 = 14,
R15 = 15,
XMM0 = 0,
XMM1 = 1,
XMM2 = 2,
XMM3 = 3,
XMM4 = 4,
XMM5 = 5,
XMM6 = 6,
XMM7 = 7,
XMM8 = 8,
XMM9 = 9,
XMM10 = 10,
XMM11 = 11,
XMM12 = 12,
XMM13 = 13,
XMM14 = 14,
XMM15 = 15,
};
struct Operand {
enum class Type {
Reg,
FReg,
Imm,
Mem64BaseAndOffset,
};
@ -58,6 +75,14 @@ struct X86_64Assembler {
return operand;
}
static Operand FloatRegister(Reg reg)
{
Operand operand;
operand.type = Type::FReg;
operand.reg = reg;
return operand;
}
static Operand Imm(u64 imm)
{
Operand operand;
@ -149,7 +174,7 @@ struct X86_64Assembler {
void emit_modrm_rm(Operand dst, Operand src, Patchable patchable = Patchable::No)
{
VERIFY(dst.type == Operand::Type::Reg);
VERIFY(dst.type == Operand::Type::Reg || dst.type == Operand::Type::FReg);
ModRM raw {};
raw.reg = encode_reg(dst.reg);
raw.rm = encode_reg(src.reg);
@ -158,7 +183,7 @@ struct X86_64Assembler {
void emit_modrm_mr(Operand dst, Operand src, Patchable patchable = Patchable::No)
{
VERIFY(src.type == Operand::Type::Reg);
VERIFY(src.type == Operand::Type::Reg || src.type == Operand::Type::FReg);
ModRM raw {};
raw.reg = encode_reg(src.reg);
raw.rm = encode_reg(dst.reg);
@ -171,6 +196,7 @@ struct X86_64Assembler {
VERIFY(rm.type != Operand::Type::Imm);
switch (rm.type) {
case Operand::Type::FReg:
case Operand::Type::Reg:
// FIXME: There is mod:00,rm:101(EBP?) -> disp32, that might be something else
raw.mode = ModRM::Reg;
@ -239,8 +265,8 @@ struct X86_64Assembler {
}
void emit_rex_for_mr(Operand dst, Operand src, REX_W W)
{
VERIFY(dst.is_register_or_memory());
VERIFY(src.type == Operand::Type::Reg);
VERIFY(dst.is_register_or_memory() || dst.type == Operand::Type::FReg);
VERIFY(src.type == Operand::Type::Reg || src.type == Operand::Type::FReg);
if (W == REX_W::No && to_underlying(dst.reg) < 8 && to_underlying(src.reg) < 8)
return;
REX rex {
@ -254,8 +280,8 @@ struct X86_64Assembler {
void emit_rex_for_rm(Operand dst, Operand src, REX_W W)
{
VERIFY(src.is_register_or_memory());
VERIFY(dst.type == Operand::Type::Reg);
VERIFY(src.is_register_or_memory() || src.type == Operand::Type::FReg);
VERIFY(dst.type == Operand::Type::Reg || dst.type == Operand::Type::FReg);
if (W == REX_W::No && to_underlying(dst.reg) < 8 && to_underlying(src.reg) < 8)
return;
REX rex {
@ -321,6 +347,24 @@ struct X86_64Assembler {
return;
}
if (dst.type == Operand::Type::FReg && src.is_register_or_memory()) {
emit8(0x66);
emit_rex_for_rm(dst, src, REX_W::Yes);
emit8(0x0f);
emit8(0x6e);
emit_modrm_rm(dst, src, patchable);
return;
}
if (dst.is_register_or_memory() && src.type == Operand::Type::FReg) {
emit8(0x66);
emit_rex_for_mr(dst, src, REX_W::Yes);
emit8(0x0f);
emit8(0x7e);
emit_modrm_mr(dst, src, patchable);
return;
}
VERIFY_NOT_REACHED();
}