58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
package asmc
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import (
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"strings"
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"git.urbach.dev/cli/q/src/asm"
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"git.urbach.dev/cli/q/src/config"
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"git.urbach.dev/cli/q/src/x86"
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)
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func (c *compiler) move(x asm.Instruction) {
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switch operands := x.Data.(type) {
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case *asm.RegisterNumber:
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c.code = x86.MoveRegisterNumber(c.code, operands.Register, operands.Number)
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case *asm.RegisterRegister:
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c.code = x86.MoveRegisterRegister(c.code, operands.Destination, operands.Source)
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case *asm.RegisterLabel:
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start := len(c.code)
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c.code = x86.MoveRegisterNumber(c.code, operands.Register, 0x00_00_00_00)
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size := 4
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opSize := len(c.code) - size - start
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regLabel := x.Data.(*asm.RegisterLabel)
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if strings.HasPrefix(regLabel.Label, "data ") {
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c.dataPointers = append(c.dataPointers, &pointer{
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Position: Address(len(c.code) - size),
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OpSize: uint8(opSize),
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Size: uint8(size),
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Resolve: func() Address {
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destination, exists := c.dataLabels[regLabel.Label]
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if !exists {
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panic("unknown label")
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}
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return config.BaseAddress + c.dataStart + destination + 8
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},
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})
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} else {
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c.codePointers = append(c.codePointers, &pointer{
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Position: Address(len(c.code) - size),
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OpSize: uint8(opSize),
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Size: uint8(size),
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Resolve: func() Address {
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destination, exists := c.codeLabels[regLabel.Label]
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if !exists {
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panic("unknown label")
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}
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return config.BaseAddress + c.codeStart + destination
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},
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})
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}
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}
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}
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