podman

1
// Copyright 2020 The Go Authors. All rights reserved.
2
// Use of this source code is governed by a BSD-style
3
// license that can be found in the LICENSE file.
4

5
// This file encapsulates some of the odd characteristics of the RISCV64
6
// instruction set, to minimize its interaction with the core of the
7
// assembler.
8

9
package arch
10

11
import (
12
	"github.com/twitchyliquid64/golang-asm/obj"
13
	"github.com/twitchyliquid64/golang-asm/obj/riscv"
14
)
15

16
// IsRISCV64AMO reports whether the op (as defined by a riscv.A*
17
// constant) is one of the AMO instructions that requires special
18
// handling.
19
func IsRISCV64AMO(op obj.As) bool {
20
	switch op {
21
	case riscv.ASCW, riscv.ASCD, riscv.AAMOSWAPW, riscv.AAMOSWAPD, riscv.AAMOADDW, riscv.AAMOADDD,
22
		riscv.AAMOANDW, riscv.AAMOANDD, riscv.AAMOORW, riscv.AAMOORD, riscv.AAMOXORW, riscv.AAMOXORD,
23
		riscv.AAMOMINW, riscv.AAMOMIND, riscv.AAMOMINUW, riscv.AAMOMINUD,
24
		riscv.AAMOMAXW, riscv.AAMOMAXD, riscv.AAMOMAXUW, riscv.AAMOMAXUD:
25
		return true
26
	}
27
	return false
28
}
29