arm64.AFCMPS, arm64.AFCMPD,
		arm64.AFCMPES, arm64.AFCMPED:
		return true
	}
	return false
}

// IsARM64STLXR reports whether the op (as defined by an arm64.A*
// constant) is one of the STLXR-like instructions that require special
// handling.
func IsARM64STLXR(op obj.As) bool {
	switch op {
	case arm64.ASTLXRB, arm64.ASTLXRH, arm64.ASTLXRW, arm64.ASTLXR,

			prog.Reg = p.getRegister(prog, op, &a[1])
			prog.To = a[2]
		case sys.AMD64:
			prog.From = a[0]
			prog.AddRestSource(a[1])
			prog.To = a[2]
		case sys.ARM64:
			switch {
			case arch.IsARM64STLXR(op):
				// ARM64 instructions with one input and two outputs.
				prog.From = a[0]
				prog.To = a[1]
				if a[2].Type != obj.TYPE_REG {