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)
  61         family=AMD64
  62         hugepagesize="1 << 21"
  63         ;;
  64     amd64p32)
  65         family=AMD64
  66         hugepagesize="1 << 21"
  67         ptrsize=4
  68         ;;
  69     arm | armbe)
  70         family=ARM
  71         cachelinesize=32
  72         minframesize=4
  73         pcquantum=4
  74         ptrsize=4
  75         case $goarch in
  76             *be)
  77                 bigendian=true
  78                 ;;
  79         esac
  80         ;;
  81     arm64 | arm64be)
  82         family=ARM64
  83         cachelinesize=32
  84         defaultphyspagesize=65536
  85         minframesize=8
  86         pcquantum=4
  87         case $goarch in
  88             *be)
  89                 bigendian=true
  90                 ;;
  91         esac
  92         ;;
  93     ia64)
  94         family=IA64
  95         cachelinesize=128
  96         defaultphyspagesize=65536
  97         ;;
  98     m68k)
  99         family=M68K
 100         bigendian=true
 101         cachelinesize=16
 102         int64align=2
 103         maxalign=2
 104         pcquantum=4
 105         ptrsize=4
 106         ;;
 107     mips | mipsle | mips64p32 | mips64p32le)
 108         family=MIPS
 109         bigendian=true
 110         cachelinesize=32
 111         defaultphyspagesize=16384
 112         minframesize=4
 113         pcquantum=4
 114         ptrsize=4
 115         case $goarch in
 116             *le)
 117                 bigendian=false
 118                 ;;
 119         esac
 120         ;;
 121     mips64 | mips64le)
 122         family=MIPS64
 123         bigendian=true
 124         cachelinesize=32
 125         defaultphyspagesize=16384
 126         minframesize=8
 127         pcquantum=4
 128         case $goarch in
 129             *le)
 130                 bigendian=false
 131                 ;;
 132         esac
 133         ;;
 134     nios2)
 135         family=NIOS2
 136         cachelinesize=32
 137         minframesize=16
 138         pcquantum=4
 139         ptrsize=4
 140         ;;
 141     ppc)
 142         family=PPC
 143         bigendian=true
 144         defaultphyspagesize=65536
 145         minframesize=32
 146         pcquantum=4
 147         ptrsize=4
 148         ;;
 149     ppc64 | ppc64le)
 150         family=PPC64
 151         bigendian=true
 152         defaultphyspagesize=65536
 153         minframesize=32
 154         pcquantum=4
 155         case $goarch in
 156             *le)
 157                 bigendian=false
 158                 ;;
 159         esac
 160         ;;
 161     riscv)
 162         family=RISCV
 163         pcquantum=2
 164         ptrsize=4
 165         ;;
 166     riscv64)
 167         family=RISCV64
 168         pcquantum=2
 169         ;;
 170     s390)
 171         family=S390
 172         bigendian=true
 173         cachelinesize=256
 174         minframesize=4
 175         pcquantum=2
 176         ptrsize=4
 177         ;;
 178     s390x)
 179         family=S390X
 180         bigendian=true
 181         cachelinesize=256
 182         minframesize=8
 183         pcquantum=2
 184         ;;
 185     sh | shbe)
 186         family=SH
 187         cachelinesize=16
 188         int64align=4
 189         minframesize=4
 190         pcquantum=2
 191         ptrsize=4
 192         case $goarch in
 193             *be)
 194                 bigendian=true
 195                 ;;
 196         esac
 197         ;;
 198     sparc)
 199         family=SPARC
 200         bigendian=true
 201         defaultphyspagesize=8192
 202         pcquantum=4
 203         ptrsize=4
 204         ;;
 205     sparc64)
 206         family=SPARC64
 207         bigendian=true
 208         defaultphyspagesize=8192
 209         pcquantum=4
 210         ;;
 211     wasm)
 212         family=WASM
 213         defaultphyspagesize=65536
 214         ;;
 215     *)
 216         echo 1>&2 "unrecognized goarch value \"$goarch\""
 217         exit 1
 218         ;;
 219 esac
 220
 221 if test "$family" = "unknown"; then
 222     echo 1>&2 "internal error: no family for goarch value \"$goarch\""
 223     exit 1
 224 fi
 225
 226 case $keyword in
 227     bigendian)
 228         echo $bigendian
 229         ;;
 230     cachelinesize)
 231         echo $cachelinesize
 232         ;;
 233     defaultphyspagesize)
 234         echo $defaultphyspagesize
 235         ;;
 236     family)
 237         echo $family
 238         ;;
 239     hugepagesize)
 240         echo $hugepagesize
 241         ;;
 242     int64align)
 243         echo $int64align
 244         ;;
 245     maxalign)
 246         echo $maxalign
 247         ;;
 248     minframesize)
 249         echo $minframesize
 250         ;;
 251     pcquantum)
 252         echo $pcquantum
 253         ;;
 254     ptrsize)
 255         echo $ptrsize
 256         ;;
 257     *)
 258         echo 1>&2 "unrecognized keyword \"$keyword\""
 259         exit 1
 260         ;;
 261 esac
 262
 263 exit 0