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 # - hugepagesize: size of a huge page in bytes
  18 #       (used only to decide when to use madvise with MADV_[NO]HUGEPAGE)
  19 #       (set to 0 if there are no huge pages)
  20 # - int64align: alignment of int64 type in bytes
  21 # - maxalign: maximum alignment of values of Go types in bytes
  22 # - minframesize: size of smallest possible function frame in bytes
  23 #       (not currently used, may never be used)
  24 # - pcquantum: minimum size of a single instruction in bytes
  25 # - ptrsize: size of a pointer in bytes
  26
  27 if test $# -ne 2; then
  28     echo 1>&2 "usage: goarch <goarch> <keyword>"
  29     exit 1
  30 fi
  31
  32 goarch=$1
  33 keyword=$2
  34
  35 # Default values
  36 bigendian=false
  37 cachelinesize=64
  38 defaultphyspagesize=4096
  39 family=unknown
  40 hugepagesize=0
  41 int64align=8
  42 maxalign=8
  43 minframesize=0
  44 pcquantum=1
  45 ptrsize=8
  46
  47 case $goarch in
  48     386)
  49         family=I386
  50         hugepagesize="1 << 21"
  51         int64align=4
  52         maxalign=4
  53         ptrsize=4
  54         ;;
  55     alpha)
  56         family=ALPHA
  57         defaultphyspagesize=8192
  58         pcquantum=4
  59         ;;
  60     amd64 | amd64p32)
  61         family=AMD64
  62         hugepagesize="1 << 21"
  63         ;;
  64     arm | armbe)
  65         family=ARM
  66         cachelinesize=32
  67         minframesize=4
  68         pcquantum=4
  69         ptrsize=4
  70         case $goarch in
  71             *be)
  72                 bigendian=true
  73                 ;;
  74         esac
  75         ;;
  76     arm64 | arm64be)
  77         family=ARM64
  78         cachelinesize=32
  79         defaultphyspagesize=65536
  80         minframesize=8
  81         pcquantum=4
  82         case $goarch in
  83             *be)
  84                 bigendian=true
  85                 ;;
  86         esac
  87         ;;
  88     ia64)
  89         family=IA64
  90         cachelinesize=128
  91         defaultphyspagesize=65536
  92         ;;
  93     m68k)
  94         family=M68K
  95         bigendian=true
  96         cachelinesize=16
  97         int64align=2
  98         maxalign=2
  99         pcquantum=4
 100         ptrsize=4
 101         ;;
 102     mips | mipsle | mips64p32 | mips64p32le)
 103         family=MIPS
 104         bigendian=true
 105         cachelinesize=32
 106         defaultphyspagesize=16384
 107         minframesize=4
 108         pcquantum=4
 109         ptrsize=4
 110         case $goarch in
 111             *le)
 112                 bigendian=false
 113                 ;;
 114         esac
 115         ;;
 116     mips64 | mips64le)
 117         family=MIPS64
 118         bigendian=true
 119         cachelinesize=32
 120         defaultphyspagesize=16384
 121         minframesize=8
 122         pcquantum=4
 123         case $goarch in
 124             *le)
 125                 bigendian=false
 126                 ;;
 127         esac
 128         ;;
 129     ppc)
 130         family=PPC
 131         bigendian=true
 132         defaultphyspagesize=65536
 133         minframesize=32
 134         pcquantum=4
 135         ptrsize=4
 136         ;;
 137     ppc64 | ppc64le)
 138         family=PPC64
 139         bigendian=true
 140         defaultphyspagesize=65536
 141         minframesize=32
 142         pcquantum=4
 143         case $goarch in
 144             *le)
 145                 bigendian=false
 146                 ;;
 147         esac
 148         ;;
 149     s390)
 150         family=S390
 151         bigendian=true
 152         cachelinesize=256
 153         minframesize=4
 154         pcquantum=2
 155         ptrsize=4
 156         ;;
 157     s390x)
 158         family=S390X
 159         bigendian=true
 160         cachelinesize=256
 161         minframesize=8
 162         pcquantum=2
 163         ;;
 164     sh | shbe)
 165         family=SH
 166         cachelinesize=16
 167         int64align=4
 168         minframesize=4
 169         pcquantum=2
 170         ptrsize=4
 171         case $goarch in
 172             *be)
 173                 bigendian=true
 174                 ;;
 175         esac
 176         ;;
 177     sparc)
 178         family=SPARC
 179         bigendian=true
 180         defaultphyspagesize=8192
 181         pcquantum=4
 182         ptrsize=4
 183         ;;
 184     sparc64)
 185         family=SPARC64
 186         bigendian=true
 187         defaultphyspagesize=8192
 188         pcquantum=4
 189         ;;
 190     *)
 191         echo 1>&2 "unrecognized goarch value \"$goarch\""
 192         exit 1
 193         ;;
 194 esac
 195
 196 if test "$family" = "unknown"; then
 197     echo 1>&2 "internal error: no family for goarch value \"$goarch\""
 198     exit 1
 199 fi
 200
 201 case $keyword in
 202     bigendian)
 203         echo $bigendian
 204         ;;
 205     cachelinesize)
 206         echo $cachelinesize
 207         ;;
 208     defaultphyspagesize)
 209         echo $defaultphyspagesize
 210         ;;
 211     family)
 212         echo $family
 213         ;;
 214     hugepagesize)
 215         echo $hugepagesize
 216         ;;
 217     int64align)
 218         echo $int64align
 219         ;;
 220     maxalign)
 221         echo $maxalign
 222         ;;
 223     minframesize)
 224         echo $minframesize
 225         ;;
 226     pcquantum)
 227         echo $pcquantum
 228         ;;
 229     ptrsize)
 230         echo $ptrsize
 231         ;;
 232     *)
 233         echo 1>&2 "unrecognized keyword \"$keyword\""
 234         exit 1
 235         ;;
 236 esac
 237
 238 exit 0