github.com/rsc/go@v0.0.0-20150416155037-e040fd465409/src/cmd/8g/galign.go (about)

     1  // Copyright 2009 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  package main
     6  
     7  import (
     8  	"cmd/internal/gc"
     9  	"cmd/internal/obj"
    10  	"cmd/internal/obj/x86"
    11  )
    12  
    13  var thechar int = '8'
    14  
    15  var thestring string = "386"
    16  
    17  var thelinkarch *obj.LinkArch = &x86.Link386
    18  
    19  func linkarchinit() {
    20  }
    21  
    22  var MAXWIDTH int64 = (1 << 32) - 1
    23  
    24  /*
    25   * go declares several platform-specific type aliases:
    26   * int, uint, and uintptr
    27   */
    28  var typedefs = []gc.Typedef{
    29  	gc.Typedef{"int", gc.TINT, gc.TINT32},
    30  	gc.Typedef{"uint", gc.TUINT, gc.TUINT32},
    31  	gc.Typedef{"uintptr", gc.TUINTPTR, gc.TUINT32},
    32  }
    33  
    34  func betypeinit() {
    35  	gc.Widthptr = 4
    36  	gc.Widthint = 4
    37  	gc.Widthreg = 4
    38  }
    39  
    40  func main() {
    41  	gc.Thearch.Thechar = thechar
    42  	gc.Thearch.Thestring = thestring
    43  	gc.Thearch.Thelinkarch = thelinkarch
    44  	gc.Thearch.Typedefs = typedefs
    45  	gc.Thearch.REGSP = x86.REGSP
    46  	gc.Thearch.REGCTXT = x86.REGCTXT
    47  	gc.Thearch.REGCALLX = x86.REG_BX
    48  	gc.Thearch.REGCALLX2 = x86.REG_AX
    49  	gc.Thearch.REGRETURN = x86.REG_AX
    50  	gc.Thearch.REGMIN = x86.REG_AX
    51  	gc.Thearch.REGMAX = x86.REG_DI
    52  	switch v := obj.Getgo386(); v {
    53  	case "387":
    54  		gc.Thearch.FREGMIN = x86.REG_F0
    55  		gc.Thearch.FREGMAX = x86.REG_F7
    56  		gc.Thearch.Use387 = true
    57  	case "sse2":
    58  		gc.Thearch.FREGMIN = x86.REG_X0
    59  		gc.Thearch.FREGMAX = x86.REG_X7
    60  	default:
    61  		gc.Fatal("unsupported setting GO386=%s", v)
    62  	}
    63  	gc.Thearch.MAXWIDTH = MAXWIDTH
    64  	gc.Thearch.ReservedRegs = resvd
    65  
    66  	gc.Thearch.Betypeinit = betypeinit
    67  	gc.Thearch.Bgen_float = bgen_float
    68  	gc.Thearch.Cgen64 = cgen64
    69  	gc.Thearch.Cgen_bmul = cgen_bmul
    70  	gc.Thearch.Cgen_float = cgen_float
    71  	gc.Thearch.Cgen_hmul = cgen_hmul
    72  	gc.Thearch.Cgen_shift = cgen_shift
    73  	gc.Thearch.Clearfat = clearfat
    74  	gc.Thearch.Cmp64 = cmp64
    75  	gc.Thearch.Defframe = defframe
    76  	gc.Thearch.Dodiv = cgen_div
    77  	gc.Thearch.Excise = excise
    78  	gc.Thearch.Expandchecks = expandchecks
    79  	gc.Thearch.Getg = getg
    80  	gc.Thearch.Gins = gins
    81  	gc.Thearch.Ginscon = ginscon
    82  	gc.Thearch.Ginsnop = ginsnop
    83  	gc.Thearch.Gmove = gmove
    84  	gc.Thearch.Igenindex = igenindex
    85  	gc.Thearch.Linkarchinit = linkarchinit
    86  	gc.Thearch.Peep = peep
    87  	gc.Thearch.Proginfo = proginfo
    88  	gc.Thearch.Regtyp = regtyp
    89  	gc.Thearch.Sameaddr = sameaddr
    90  	gc.Thearch.Smallindir = smallindir
    91  	gc.Thearch.Stackaddr = stackaddr
    92  	gc.Thearch.Stackcopy = stackcopy
    93  	gc.Thearch.Sudoaddable = sudoaddable
    94  	gc.Thearch.Sudoclean = sudoclean
    95  	gc.Thearch.Excludedregs = excludedregs
    96  	gc.Thearch.RtoB = RtoB
    97  	gc.Thearch.FtoB = FtoB
    98  	gc.Thearch.BtoR = BtoR
    99  	gc.Thearch.BtoF = BtoF
   100  	gc.Thearch.Optoas = optoas
   101  	gc.Thearch.Doregbits = doregbits
   102  	gc.Thearch.Regnames = regnames
   103  
   104  	gc.Main()
   105  	gc.Exit(0)
   106  }