1 // Derived from Inferno utils/6c/reg.c
2 // http://code.google.com/p/inferno-os/source/browse/utils/6c/reg.c
4 // Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
5 // Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
6 // Portions Copyright © 1997-1999 Vita Nuova Limited
7 // Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
8 // Portions Copyright © 2004,2006 Bruce Ellis
9 // Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
10 // Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
11 // Portions Copyright © 2009 The Go Authors. All rights reserved.
13 // Permission is hereby granted, free of charge, to any person obtaining a copy
14 // of this software and associated documentation files (the "Software"), to deal
15 // in the Software without restriction, including without limitation the rights
16 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
17 // copies of the Software, and to permit persons to whom the Software is
18 // furnished to do so, subject to the following conditions:
20 // The above copyright notice and this permission notice shall be included in
21 // all copies or substantial portions of the Software.
23 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
24 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
25 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
26 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
27 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
28 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
34 "cmd/compile/internal/gc"
36 "cmd/internal/obj/x86"
43 var regname = []string{
78 func regnames(n *int) []string {
83 func excludedregs() uint64 {
84 return RtoB(x86.REG_SP)
87 func doregbits(r int) uint64 {
89 if r >= x86.REG_AX && r <= x86.REG_R15 {
91 } else if r >= x86.REG_AL && r <= x86.REG_R15B {
92 b |= RtoB(r - x86.REG_AL + x86.REG_AX)
93 } else if r >= x86.REG_AH && r <= x86.REG_BH {
94 b |= RtoB(r - x86.REG_AH + x86.REG_AX)
95 } else if r >= x86.REG_X0 && r <= x86.REG_X0+15 {
103 AX = 1 << (x86.REG_AX - x86.REG_AX)
104 BX = 1 << (x86.REG_BX - x86.REG_AX)
105 CX = 1 << (x86.REG_CX - x86.REG_AX)
106 DX = 1 << (x86.REG_DX - x86.REG_AX)
107 DI = 1 << (x86.REG_DI - x86.REG_AX)
108 SI = 1 << (x86.REG_SI - x86.REG_AX)
109 R15 = 1 << (x86.REG_R15 - x86.REG_AX)
113 func RtoB(r int) uint64 {
114 if r < x86.REG_AX || r > x86.REG_R15 {
117 return 1 << uint(r-x86.REG_AX)
120 func BtoR(b uint64) int {
123 b &^= (1<<(x86.REG_BP-x86.REG_AX) | 1<<(x86.REG_R15-x86.REG_AX))
124 } else if obj.Framepointer_enabled != 0 {
125 // BP is part of the calling convention if framepointer_enabled.
126 b &^= (1 << (x86.REG_BP - x86.REG_AX))
131 return gc.Bitno(b) + x86.REG_AX
140 func FtoB(f int) uint64 {
141 if f < x86.REG_X0 || f > x86.REG_X15 {
144 return 1 << uint(f-x86.REG_X0+16)
147 func BtoF(b uint64) int {
152 return gc.Bitno(b) - 16 + x86.REG_X0