56 lines
1.1 KiB
Go
56 lines
1.1 KiB
Go
package asmc
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"git.urbach.dev/cli/q/src/arm"
|
|
"git.urbach.dev/cli/q/src/asm"
|
|
)
|
|
|
|
func (c *compiler) compileARM(x asm.Instruction) {
|
|
switch x.Mnemonic {
|
|
case asm.CALL:
|
|
switch data := x.Data.(type) {
|
|
case *asm.Label:
|
|
position := len(c.code)
|
|
c.code = arm.Call(c.code, 0)
|
|
|
|
pointer := &pointer{
|
|
Position: Address(position),
|
|
OpSize: 0,
|
|
Size: 4,
|
|
}
|
|
|
|
pointer.Resolve = func() Address {
|
|
destination, exists := c.codeLabels[data.Name]
|
|
|
|
if !exists {
|
|
panic(fmt.Sprintf("unknown jump label %s", data.Name))
|
|
}
|
|
|
|
distance := (destination - pointer.Position) / 4
|
|
return arm.EncodeCall(distance)
|
|
}
|
|
|
|
c.codePointers = append(c.codePointers, pointer)
|
|
}
|
|
|
|
case asm.LABEL:
|
|
c.codeLabels[x.Data.(*asm.Label).Name] = Address(len(c.code))
|
|
|
|
case asm.MOVE:
|
|
switch operands := x.Data.(type) {
|
|
case *asm.RegisterNumber:
|
|
c.code = arm.MoveRegisterNumber(c.code, operands.Register, operands.Number)
|
|
}
|
|
|
|
case asm.RETURN:
|
|
c.code = arm.Return(c.code)
|
|
|
|
case asm.SYSCALL:
|
|
c.code = arm.Syscall(c.code)
|
|
|
|
default:
|
|
c.code = arm.Nop(c.code)
|
|
}
|
|
}
|