libgo/goarch.sh

   1 #!/bin/sh
   2
   3 # Copyright 2018 The Go Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style
   5 # license that can be found in the LICENSE file.
   6
   7 # Code in Makefile.am will invoke this script with two arguments.
   8 # The first is a GOARCH value.  The second is a keyword.
   9 # The script will print the value of that keyword for that GOARCH.
  10 # Keywords:
  11 # - bigendian: true or false
  12 # - cachelinesize: the cache line size in bytes
  13 #       (for performance only; it's not essential to get this right)
  14 # - defaultphyspagesize: the default physical page size in bytes
  15 #       (not currently used, but maybe some day)
  16 # - family: the processor family, from ALLGOARCHFAMILY in configure.ac
  17 # - int64align: alignment of int64 type in bytes
  18 # - maxalign: maximum alignment of values of Go types in bytes
  19 # - minframesize: size of smallest possible function frame in bytes
  20 #       (not currently used, may never be used)
  21 # - pcquantum: minimum size of a single instruction in bytes
  22 # - ptrsize: size of a pointer in bytes
  23
  24 if test $# -ne 2; then
  25     echo 1>&2 "usage: goarch <goarch> <keyword>"
  26     exit 1
  27 fi
  28
  29 goarch=$1
  30 keyword=$2
  31
  32 # Default values
  33 bigendian=false
  34 cachelinesize=64
  35 defaultphyspagesize=4096
  36 family=unknown
  37 int64align=8
  38 maxalign=8
  39 minframesize=0
  40 pcquantum=1
  41 ptrsize=8
  42
  43 case $goarch in
  44     386)
  45         family=I386
  46         int64align=4
  47         maxalign=4
  48         ptrsize=4
  49         ;;
  50     alpha)
  51         family=ALPHA
  52         defaultphyspagesize=8192
  53         pcquantum=4
  54         ;;
  55     amd64)
  56         family=AMD64
  57         ;;
  58     amd64p32)
  59         family=AMD64
  60         ptrsize=4
  61         ;;
  62     arm | armbe)
  63         family=ARM
  64         cachelinesize=32
  65         minframesize=4
  66         pcquantum=4
  67         ptrsize=4
  68         case $goarch in
  69             *be)
  70                 bigendian=true
  71                 ;;
  72         esac
  73         ;;
  74     arm64 | arm64be)
  75         family=ARM64
  76         cachelinesize=32
  77         defaultphyspagesize=65536
  78         minframesize=8
  79         pcquantum=4
  80         case $goarch in
  81             *be)
  82                 bigendian=true
  83                 ;;
  84         esac
  85         ;;
  86     ia64)
  87         family=IA64
  88         cachelinesize=128
  89         defaultphyspagesize=65536
  90         ;;
  91     m68k)
  92         family=M68K
  93         bigendian=true
  94         cachelinesize=16
  95         int64align=2
  96         maxalign=2
  97         pcquantum=4
  98         ptrsize=4
  99         ;;
 100     mips | mipsle | mips64p32 | mips64p32le)
 101         family=MIPS
 102         bigendian=true
 103         cachelinesize=32
 104         defaultphyspagesize=16384
 105         minframesize=4
 106         pcquantum=4
 107         ptrsize=4
 108         case $goarch in
 109             *le)
 110                 bigendian=false
 111                 ;;
 112         esac
 113         ;;
 114     mips64 | mips64le)
 115         family=MIPS64
 116         bigendian=true
 117         cachelinesize=32
 118         defaultphyspagesize=16384
 119         minframesize=8
 120         pcquantum=4
 121         case $goarch in
 122             *le)
 123                 bigendian=false
 124                 ;;
 125         esac
 126         ;;
 127     nios2)
 128         family=NIOS2
 129         cachelinesize=32
 130         minframesize=16
 131         pcquantum=4
 132         ptrsize=4
 133         ;;
 134     ppc)
 135         family=PPC
 136         bigendian=true
 137         defaultphyspagesize=65536
 138         minframesize=32
 139         pcquantum=4
 140         ptrsize=4
 141         ;;
 142     ppc64 | ppc64le)
 143         family=PPC64
 144         bigendian=true
 145         defaultphyspagesize=65536
 146         minframesize=32
 147         pcquantum=4
 148         case $goarch in
 149             *le)
 150                 bigendian=false
 151                 ;;
 152         esac
 153         ;;
 154     riscv)
 155         family=RISCV
 156         pcquantum=2
 157         ptrsize=4
 158         ;;
 159     riscv64)
 160         family=RISCV64
 161         pcquantum=2
 162         ;;
 163     s390)
 164         family=S390
 165         bigendian=true
 166         cachelinesize=256
 167         minframesize=4
 168         pcquantum=2
 169         ptrsize=4
 170         ;;
 171     s390x)
 172         family=S390X
 173         bigendian=true
 174         cachelinesize=256
 175         minframesize=8
 176         pcquantum=2
 177         ;;
 178     sh | shbe)
 179         family=SH
 180         cachelinesize=16
 181         int64align=4
 182         minframesize=4
 183         pcquantum=2
 184         ptrsize=4
 185         case $goarch in
 186             *be)
 187                 bigendian=true
 188                 ;;
 189         esac
 190         ;;
 191     sparc)
 192         family=SPARC
 193         bigendian=true
 194         defaultphyspagesize=8192
 195         pcquantum=4
 196         ptrsize=4
 197         ;;
 198     sparc64)
 199         family=SPARC64
 200         bigendian=true
 201         defaultphyspagesize=8192
 202         pcquantum=4
 203         ;;
 204     wasm)
 205         family=WASM
 206         defaultphyspagesize=65536
 207         ;;
 208     *)
 209         echo 1>&2 "unrecognized goarch value \"$goarch\""
 210         exit 1
 211         ;;
 212 esac
 213
 214 if test "$family" = "unknown"; then
 215     echo 1>&2 "internal error: no family for goarch value \"$goarch\""
 216     exit 1
 217 fi
 218
 219 case $keyword in
 220     bigendian)
 221         echo $bigendian
 222         ;;
 223     cachelinesize)
 224         echo $cachelinesize
 225         ;;
 226     defaultphyspagesize)
 227         echo $defaultphyspagesize
 228         ;;
 229     family)
 230         echo $family
 231         ;;
 232     int64align)
 233         echo $int64align
 234         ;;
 235     maxalign)
 236         echo $maxalign
 237         ;;
 238     minframesize)
 239         echo $minframesize
 240         ;;
 241     pcquantum)
 242         echo $pcquantum
 243         ;;
 244     ptrsize)
 245         echo $ptrsize
 246         ;;
 247     *)
 248         echo 1>&2 "unrecognized keyword \"$keyword\""
 249         exit 1
 250         ;;
 251 esac
 252
 253 exit 0