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// Derived from Inferno utils/6c/reg.c
// http://code.google.com/p/inferno-os/source/browse/utils/6c/reg.c
//
// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
// Portions Copyright © 1997-1999 Vita Nuova Limited
// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
// Portions Copyright © 2004,2006 Bruce Ellis
// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
// Portions Copyright © 2009 The Go Authors. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package ppc64
import "cmd/internal/obj/ppc64"
import "cmd/compile/internal/gc"
const (
NREGVAR = 64 /* 32 general + 32 floating */
)
var regname = []string{
".R0",
".R1",
".R2",
".R3",
".R4",
".R5",
".R6",
".R7",
".R8",
".R9",
".R10",
".R11",
".R12",
".R13",
".R14",
".R15",
".R16",
".R17",
".R18",
".R19",
".R20",
".R21",
".R22",
".R23",
".R24",
".R25",
".R26",
".R27",
".R28",
".R29",
".R30",
".R31",
".F0",
".F1",
".F2",
".F3",
".F4",
".F5",
".F6",
".F7",
".F8",
".F9",
".F10",
".F11",
".F12",
".F13",
".F14",
".F15",
".F16",
".F17",
".F18",
".F19",
".F20",
".F21",
".F22",
".F23",
".F24",
".F25",
".F26",
".F27",
".F28",
".F29",
".F30",
".F31",
}
func regnames(n *int) []string {
*n = NREGVAR
return regname
}
func excludedregs() uint64 {
// Exclude registers with fixed functions
regbits := uint64(1<<0 | RtoB(ppc64.REGSP) | RtoB(ppc64.REGG) | RtoB(ppc64.REGTLS) | RtoB(ppc64.REGTMP))
// Also exclude floating point registers with fixed constants
regbits |= RtoB(ppc64.REG_F27) | RtoB(ppc64.REG_F28) | RtoB(ppc64.REG_F29) | RtoB(ppc64.REG_F30) | RtoB(ppc64.REG_F31)
return regbits
}
func doregbits(r int) uint64 {
return 0
}
/*
* track register variables including external registers:
* bit reg
* 0 R0
* 1 R1
* ... ...
* 31 R31
* 32+0 F0
* 32+1 F1
* ... ...
* 32+31 F31
*/
func RtoB(r int) uint64 {
if r > ppc64.REG_R0 && r <= ppc64.REG_R31 {
return 1 << uint(r-ppc64.REG_R0)
}
if r >= ppc64.REG_F0 && r <= ppc64.REG_F31 {
return 1 << uint(32+r-ppc64.REG_F0)
}
return 0
}
func BtoR(b uint64) int {
b &= 0xffffffff
if b == 0 {
return 0
}
return gc.Bitno(b) + ppc64.REG_R0
}
func BtoF(b uint64) int {
b >>= 32
if b == 0 {
return 0
}
return gc.Bitno(b) + ppc64.REG_F0
}
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