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     riscv64)
 150         family=RISCV64
 151         pcquantum=2
 152         ;;
 153     s390)
 154         family=S390
 155         bigendian=true
 156         cachelinesize=256
 157         minframesize=4
 158         pcquantum=2
 159         ptrsize=4
 160         ;;
 161     s390x)
 162         family=S390X
 163         bigendian=true
 164         cachelinesize=256
 165         minframesize=8
 166         pcquantum=2
 167         ;;
 168     sh | shbe)
 169         family=SH
 170         cachelinesize=16
 171         int64align=4
 172         minframesize=4
 173         pcquantum=2
 174         ptrsize=4
 175         case $goarch in
 176             *be)
 177                 bigendian=true
 178                 ;;
 179         esac
 180         ;;
 181     sparc)
 182         family=SPARC
 183         bigendian=true
 184         defaultphyspagesize=8192
 185         pcquantum=4
 186         ptrsize=4
 187         ;;
 188     sparc64)
 189         family=SPARC64
 190         bigendian=true
 191         defaultphyspagesize=8192
 192         pcquantum=4
 193         ;;
 194     *)
 195         echo 1>&2 "unrecognized goarch value \"$goarch\""
 196         exit 1
 197         ;;
 198 esac
 199
 200 if test "$family" = "unknown"; then
 201     echo 1>&2 "internal error: no family for goarch value \"$goarch\""
 202     exit 1
 203 fi
 204
 205 case $keyword in
 206     bigendian)
 207         echo $bigendian
 208         ;;
 209     cachelinesize)
 210         echo $cachelinesize
 211         ;;
 212     defaultphyspagesize)
 213         echo $defaultphyspagesize
 214         ;;
 215     family)
 216         echo $family
 217         ;;
 218     hugepagesize)
 219         echo $hugepagesize
 220         ;;
 221     int64align)
 222         echo $int64align
 223         ;;
 224     maxalign)
 225         echo $maxalign
 226         ;;
 227     minframesize)
 228         echo $minframesize
 229         ;;
 230     pcquantum)
 231         echo $pcquantum
 232         ;;
 233     ptrsize)
 234         echo $ptrsize
 235         ;;
 236     *)
 237         echo 1>&2 "unrecognized keyword \"$keyword\""
 238         exit 1
 239         ;;
 240 esac
 241
 242 exit 0