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"
35 "cmd/internal/obj/arm64"
39 NREGVAR = 64 /* 32 general + 32 floating */
42 var regname = []string{
109 func regnames(n *int) []string {
114 func excludedregs() uint64 {
115 // Exclude registers with fixed functions
116 regbits := RtoB(arm64.REGRT1) | RtoB(arm64.REGRT2) | RtoB(arm64.REGPR)
118 // Exclude R26 - R31.
119 for r := arm64.REGMAX + 1; r <= arm64.REGZERO; r++ {
123 // Also exclude floating point registers with fixed constants
124 regbits |= RtoB(arm64.REG_F27) | RtoB(arm64.REG_F28) | RtoB(arm64.REG_F29) | RtoB(arm64.REG_F30) | RtoB(arm64.REG_F31)
129 func doregbits(r int) uint64 {
134 * track register variables including external registers:
145 func RtoB(r int) uint64 {
146 if r >= arm64.REG_R0 && r <= arm64.REG_R31 {
147 return 1 << uint(r-arm64.REG_R0)
149 if r >= arm64.REG_F0 && r <= arm64.REG_F31 {
150 return 1 << uint(32+r-arm64.REG_F0)
155 func BtoR(b uint64) int {
160 return gc.Bitno(b) + arm64.REG_R0
163 func BtoF(b uint64) int {
168 return gc.Bitno(b) + arm64.REG_F0