diff options
Diffstat (limited to 'src/cmd/9g/reg.go')
-rw-r--r-- | src/cmd/9g/reg.go | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/src/cmd/9g/reg.go b/src/cmd/9g/reg.go new file mode 100644 index 0000000000..faed60d0ee --- /dev/null +++ b/src/cmd/9g/reg.go @@ -0,0 +1,164 @@ +// 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 main + +import "cmd/internal/obj/ppc64" +import "cmd/internal/gc" + +const ( + NREGVAR = 64 +) + +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 { + var regbits uint64 + + // Exclude registers with fixed functions + regbits = 1<<0 | RtoB(ppc64.REGSP) | RtoB(ppc64.REGG) | RtoB(ppc64.REGTLS) + + // 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 +} |