37 lines
678 B
Go
37 lines
678 B
Go
package x86
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import (
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"git.urbach.dev/cli/q/src/cpu"
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"git.urbach.dev/cli/q/src/sizeof"
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)
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// PushNumber pushes a number onto the stack.
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func PushNumber(code []byte, number int32) []byte {
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length := sizeof.Signed(number)
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if length >= 2 {
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return append(
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code,
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0x68,
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byte(number),
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byte(number>>8),
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byte(number>>16),
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byte(number>>24),
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)
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}
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return append(code, 0x6A, byte(number))
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}
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// PushRegister pushes the value inside the register onto the stack.
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func PushRegister(code []byte, register cpu.Register) []byte {
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if register > 0b111 {
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code = append(code, REX(0, 0, 0, 1))
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register &= 0b111
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}
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return append(
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code,
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0x50+byte(register),
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)
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}
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