github.com/miolini/go@v0.0.0-20160405192216-fca68c8cb408/src/cmd/compile/internal/x86/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 x86
     6  
     7  import (
     8  	"cmd/compile/internal/gc"
     9  	"cmd/internal/obj"
    10  	"cmd/internal/obj/x86"
    11  	"fmt"
    12  	"os"
    13  )
    14  
    15  func betypeinit() {
    16  	gc.Widthptr = 4
    17  	gc.Widthint = 4
    18  	gc.Widthreg = 4
    19  }
    20  
    21  func Main() {
    22  	gc.Thearch.Thechar = '8'
    23  	gc.Thearch.Thestring = "386"
    24  	gc.Thearch.Thelinkarch = &x86.Link386
    25  	gc.Thearch.REGSP = x86.REGSP
    26  	gc.Thearch.REGCTXT = x86.REGCTXT
    27  	gc.Thearch.REGCALLX = x86.REG_BX
    28  	gc.Thearch.REGCALLX2 = x86.REG_AX
    29  	gc.Thearch.REGRETURN = x86.REG_AX
    30  	gc.Thearch.REGMIN = x86.REG_AX
    31  	gc.Thearch.REGMAX = x86.REG_DI
    32  	switch v := obj.Getgo386(); v {
    33  	case "387":
    34  		gc.Thearch.FREGMIN = x86.REG_F0
    35  		gc.Thearch.FREGMAX = x86.REG_F7
    36  		gc.Thearch.Use387 = true
    37  	case "sse2":
    38  		gc.Thearch.FREGMIN = x86.REG_X0
    39  		gc.Thearch.FREGMAX = x86.REG_X7
    40  	default:
    41  		fmt.Fprintf(os.Stderr, "unsupported setting GO386=%s\n", v)
    42  		gc.Exit(1)
    43  	}
    44  	gc.Thearch.MAXWIDTH = (1 << 32) - 1
    45  	gc.Thearch.ReservedRegs = resvd
    46  
    47  	gc.Thearch.Betypeinit = betypeinit
    48  	gc.Thearch.Bgen_float = bgen_float
    49  	gc.Thearch.Cgen64 = cgen64
    50  	gc.Thearch.Cgen_bmul = cgen_bmul
    51  	gc.Thearch.Cgen_float = cgen_float
    52  	gc.Thearch.Cgen_hmul = cgen_hmul
    53  	gc.Thearch.Cgen_shift = cgen_shift
    54  	gc.Thearch.Clearfat = clearfat
    55  	gc.Thearch.Cmp64 = cmp64
    56  	gc.Thearch.Defframe = defframe
    57  	gc.Thearch.Dodiv = cgen_div
    58  	gc.Thearch.Excise = excise
    59  	gc.Thearch.Expandchecks = expandchecks
    60  	gc.Thearch.Getg = getg
    61  	gc.Thearch.Gins = gins
    62  	gc.Thearch.Ginscmp = ginscmp
    63  	gc.Thearch.Ginscon = ginscon
    64  	gc.Thearch.Ginsnop = ginsnop
    65  	gc.Thearch.Gmove = gmove
    66  	gc.Thearch.Igenindex = igenindex
    67  	gc.Thearch.Peep = peep
    68  	gc.Thearch.Proginfo = proginfo
    69  	gc.Thearch.Regtyp = regtyp
    70  	gc.Thearch.Sameaddr = sameaddr
    71  	gc.Thearch.Smallindir = smallindir
    72  	gc.Thearch.Stackaddr = stackaddr
    73  	gc.Thearch.Blockcopy = blockcopy
    74  	gc.Thearch.Sudoaddable = sudoaddable
    75  	gc.Thearch.Sudoclean = sudoclean
    76  	gc.Thearch.Excludedregs = excludedregs
    77  	gc.Thearch.RtoB = RtoB
    78  	gc.Thearch.FtoB = FtoB
    79  	gc.Thearch.BtoR = BtoR
    80  	gc.Thearch.BtoF = BtoF
    81  	gc.Thearch.Optoas = optoas
    82  	gc.Thearch.Doregbits = doregbits
    83  	gc.Thearch.Regnames = regnames
    84  
    85  	gc.Main()
    86  	gc.Exit(0)
    87  }