cli/q
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Improved assembler

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This commit is contained in:
Eduard Urbach
2024-06-26 14:14:11 +02:00
parent e23c1ece80
commit 68ec1467ef
7 changed files with 85 additions and 46 deletions
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71
src/build/asm/Assembler.go
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@ -52,36 +52,7 @@ func (a *Assembler) Finalize() ([]byte, []byte) {
}
case DIV:
switch operands := x.Data.(type) {
case *RegisterNumber:
if operands.Register == x64.RAX {
code = x64.PushRegister(code, x64.RCX)
code = x64.MoveRegisterNumber32(code, x64.RCX, uint32(operands.Number))
code = x64.ExtendRAXToRDX(code)
code = x64.DivRegister(code, x64.RCX)
code = x64.PopRegister(code, x64.RCX)
} else {
code = x64.PushRegister(code, x64.RAX)
code = x64.PushRegister(code, x64.RDX)
code = x64.MoveRegisterRegister64(code, x64.RAX, operands.Register)
code = x64.MoveRegisterNumber32(code, operands.Register, uint32(operands.Number))
code = x64.ExtendRAXToRDX(code)
code = x64.DivRegister(code, operands.Register)
code = x64.MoveRegisterRegister64(code, operands.Register, x64.RAX)
code = x64.PopRegister(code, x64.RDX)
code = x64.PopRegister(code, x64.RAX)
}
case *RegisterRegister:
code = x64.PushRegister(code, x64.RAX)
code = x64.PushRegister(code, x64.RDX)
code = x64.MoveRegisterRegister64(code, x64.RAX, operands.Destination)
code = x64.ExtendRAXToRDX(code)
code = x64.DivRegister(code, operands.Source)
code = x64.MoveRegisterRegister64(code, operands.Destination, x64.RAX)
code = x64.PopRegister(code, x64.RDX)
code = x64.PopRegister(code, x64.RAX)
}
code = divide(code, x.Data)
case CALL:
code = x64.Call(code, 0x00_00_00_00)
@ -166,3 +137,43 @@ func (a *Assembler) Finalize() ([]byte, []byte) {
func (a *Assembler) Merge(b *Assembler) {
a.Instructions = append(a.Instructions, b.Instructions...)
}
// divide implements the division on x64 machines.
func divide(code []byte, data any) []byte {
code = x64.PushRegister(code, x64.RDX)
switch operands := data.(type) {
case *RegisterNumber:
if operands.Register == x64.RAX {
code = x64.PushRegister(code, x64.RCX)
code = x64.MoveRegisterNumber32(code, x64.RCX, uint32(operands.Number))
code = x64.ExtendRAXToRDX(code)
code = x64.DivRegister(code, x64.RCX)
code = x64.PopRegister(code, x64.RCX)
} else {
code = x64.PushRegister(code, x64.RAX)
code = x64.MoveRegisterRegister64(code, x64.RAX, operands.Register)
code = x64.MoveRegisterNumber32(code, operands.Register, uint32(operands.Number))
code = x64.ExtendRAXToRDX(code)
code = x64.DivRegister(code, operands.Register)
code = x64.MoveRegisterRegister64(code, operands.Register, x64.RAX)
code = x64.PopRegister(code, x64.RAX)
}
case *RegisterRegister:
if operands.Destination == x64.RAX {
code = x64.ExtendRAXToRDX(code)
code = x64.DivRegister(code, operands.Source)
} else {
code = x64.PushRegister(code, x64.RAX)
code = x64.MoveRegisterRegister64(code, x64.RAX, operands.Destination)
code = x64.ExtendRAXToRDX(code)
code = x64.DivRegister(code, operands.Source)
code = x64.MoveRegisterRegister64(code, operands.Destination, x64.RAX)
code = x64.PopRegister(code, x64.RAX)
}
}
code = x64.PopRegister(code, x64.RDX)
return code
}