package asmc

import (
	"git.urbach.dev/cli/q/src/asm"
	"git.urbach.dev/cli/q/src/x86"
)

func (c *compiler) call(x asm.Instruction) {
	switch data := x.Data.(type) {
	case *asm.Label:
		c.code = x86.Call(c.code, 0x00_00_00_00)
		size := 4

		pointer := &pointer{
			Position: Address(len(c.code) - size),
			OpSize:   1,
			Size:     uint8(size),
		}

		pointer.Resolve = func() Address {
			destination, exists := c.codeLabels[data.Name]

			if !exists {
				panic("unknown jump label")
			}

			distance := destination - (pointer.Position + Address(pointer.Size))
			return distance
		}

		c.codePointers = append(c.codePointers, pointer)

	case *asm.Register:
		c.code = x86.CallRegister(c.code, data.Register)

	case *asm.Memory:
		c.code = x86.CallAtMemory(c.code, data.Base, data.Offset)
	}
}