s390x.go raw

   1  // Copyright 2016 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
   6  // s390x instruction set, to minimize its interaction
   7  // with the core of the assembler.
   8  
   9  package arch
  10  
  11  import (
  12  	"github.com/twitchyliquid64/golang-asm/obj/s390x"
  13  )
  14  
  15  func jumpS390x(word string) bool {
  16  	switch word {
  17  	case "BRC",
  18  		"BC",
  19  		"BCL",
  20  		"BEQ",
  21  		"BGE",
  22  		"BGT",
  23  		"BL",
  24  		"BLE",
  25  		"BLEU",
  26  		"BLT",
  27  		"BLTU",
  28  		"BNE",
  29  		"BR",
  30  		"BVC",
  31  		"BVS",
  32  		"BRCT",
  33  		"BRCTG",
  34  		"CMPBEQ",
  35  		"CMPBGE",
  36  		"CMPBGT",
  37  		"CMPBLE",
  38  		"CMPBLT",
  39  		"CMPBNE",
  40  		"CMPUBEQ",
  41  		"CMPUBGE",
  42  		"CMPUBGT",
  43  		"CMPUBLE",
  44  		"CMPUBLT",
  45  		"CMPUBNE",
  46  		"CRJ",
  47  		"CGRJ",
  48  		"CLRJ",
  49  		"CLGRJ",
  50  		"CIJ",
  51  		"CGIJ",
  52  		"CLIJ",
  53  		"CLGIJ",
  54  		"CALL",
  55  		"JMP":
  56  		return true
  57  	}
  58  	return false
  59  }
  60  
  61  func s390xRegisterNumber(name string, n int16) (int16, bool) {
  62  	switch name {
  63  	case "AR":
  64  		if 0 <= n && n <= 15 {
  65  			return s390x.REG_AR0 + n, true
  66  		}
  67  	case "F":
  68  		if 0 <= n && n <= 15 {
  69  			return s390x.REG_F0 + n, true
  70  		}
  71  	case "R":
  72  		if 0 <= n && n <= 15 {
  73  			return s390x.REG_R0 + n, true
  74  		}
  75  	case "V":
  76  		if 0 <= n && n <= 31 {
  77  			return s390x.REG_V0 + n, true
  78  		}
  79  	}
  80  	return 0, false
  81  }
  82