mirror of
https://github.com/mozilla/gecko-dev.git
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289 lines
6.7 KiB
C
289 lines
6.7 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*
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* Generate CPU-specific bit-size and similar #defines.
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*/
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#include <stdio.h>
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#if defined(sgi)
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#ifndef IRIX
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# error "IRIX is not defined"
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#endif
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#endif
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#if defined(__sun)
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#if defined(__svr4) || defined(__svr4__)
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#ifndef SOLARIS
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# error "SOLARIS is not defined"
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#endif
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#else
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#ifndef SUNOS4
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# error "SUNOS4 is not defined"
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#endif
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#endif
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#endif
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#if defined(__hpux)
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#ifndef HPUX
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# error "HPUX is not defined"
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#endif
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#endif
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#if defined(__osf__)
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#ifndef OSF1
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# error "OSF1 is not defined"
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#endif
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#endif
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#if defined(_IBMR2)
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#ifndef AIX
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# error "AIX is not defined"
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#endif
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#endif
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#if defined(linux)
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#ifndef LINUX
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# error "LINUX is not defined"
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#endif
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#endif
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#if defined(bsdi)
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#ifndef BSDI
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# error "BSDI is not defined"
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#endif
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#endif
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#if defined(M_UNIX)
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#ifndef SCO
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# error "SCO is not defined"
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#endif
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#endif
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#if !defined(M_UNIX) && defined(_USLC_)
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#ifndef UNIXWARE
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# error "UNIXWARE is not defined"
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#endif
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#endif
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#ifdef __MWERKS__
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#define XP_MAC 1
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#endif
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/************************************************************************/
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/* Generate cpucfg.h */
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#ifdef XP_MAC
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#include <Types.h>
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#define INT64 UnsignedWide
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#else
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#ifdef XP_PC
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#ifdef WIN32
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#define INT64 _int64
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#else
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#define INT64 long
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#endif
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#else
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#if defined(HPUX) || defined(SCO) || defined(UNIXWARE)
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#define INT64 long
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#else
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#define INT64 long long
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#endif
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#endif
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#endif
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typedef void *prword;
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struct align_short {
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char c;
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short a;
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};
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struct align_int {
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char c;
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int a;
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};
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struct align_long {
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char c;
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long a;
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};
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struct align_int64 {
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char c;
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INT64 a;
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};
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struct align_fakelonglong {
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char c;
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struct {
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long hi, lo;
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} a;
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};
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struct align_float {
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char c;
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float a;
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};
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struct align_double {
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char c;
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double a;
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};
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struct align_pointer {
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char c;
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void *a;
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};
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struct align_prword {
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char c;
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prword a;
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};
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#define ALIGN_OF(type) \
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(((char*)&(((struct align_##type *)0)->a)) - ((char*)0))
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int bpb;
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static int Log2(int n)
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{
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int log2 = 0;
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if (n & (n-1))
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log2++;
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if (n >> 16)
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log2 += 16, n >>= 16;
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if (n >> 8)
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log2 += 8, n >>= 8;
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if (n >> 4)
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log2 += 4, n >>= 4;
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if (n >> 2)
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log2 += 2, n >>= 2;
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if (n >> 1)
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log2++;
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return log2;
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}
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/* We assume that int's are 32 bits */
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static void do64(void)
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{
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union {
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long i;
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char c[4];
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} u;
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u.i = 0x01020304;
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if (u.c[0] == 0x01) {
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printf("#undef IS_LITTLE_ENDIAN\n");
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printf("#define IS_BIG_ENDIAN 1\n\n");
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} else {
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printf("#define IS_LITTLE_ENDIAN 1\n");
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printf("#undef IS_BIG_ENDIAN\n\n");
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}
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}
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static void do32(void)
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{
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union {
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long i;
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char c[4];
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} u;
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u.i = 0x01020304;
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if (u.c[0] == 0x01) {
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printf("#undef IS_LITTLE_ENDIAN\n");
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printf("#define IS_BIG_ENDIAN 1\n\n");
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} else {
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printf("#define IS_LITTLE_ENDIAN 1\n");
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printf("#undef IS_BIG_ENDIAN\n\n");
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}
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}
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/*
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* Conceivably this could actually be used, but there is lots of code out
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* there with ands and shifts in it that assumes a byte is exactly 8 bits,
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* so forget about porting THIS code to all those non 8 bit byte machines.
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*/
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static void BitsPerByte(void)
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{
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bpb = 8;
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}
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int main(int argc, char **argv)
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{
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BitsPerByte();
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printf("#ifndef nspr_cpucfg___\n");
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printf("#define nspr_cpucfg___\n\n");
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printf("/* AUTOMATICALLY GENERATED - DO NOT EDIT */\n\n");
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if (sizeof(long) == 8) {
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do64();
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} else {
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do32();
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}
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printf("#define PR_BYTES_PER_BYTE %dL\n", sizeof(char));
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printf("#define PR_BYTES_PER_SHORT %dL\n", sizeof(short));
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printf("#define PR_BYTES_PER_INT %dL\n", sizeof(int));
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printf("#define PR_BYTES_PER_INT64 %dL\n", 8);
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printf("#define PR_BYTES_PER_LONG %dL\n", sizeof(long));
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printf("#define PR_BYTES_PER_FLOAT %dL\n", sizeof(float));
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printf("#define PR_BYTES_PER_DOUBLE %dL\n", sizeof(double));
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printf("#define PR_BYTES_PER_WORD %dL\n", sizeof(prword));
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printf("#define PR_BYTES_PER_DWORD %dL\n", 8);
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printf("\n");
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printf("#define PR_BITS_PER_BYTE %dL\n", bpb);
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printf("#define PR_BITS_PER_SHORT %dL\n", bpb * sizeof(short));
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printf("#define PR_BITS_PER_INT %dL\n", bpb * sizeof(int));
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printf("#define PR_BITS_PER_INT64 %dL\n", bpb * 8);
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printf("#define PR_BITS_PER_LONG %dL\n", bpb * sizeof(long));
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printf("#define PR_BITS_PER_FLOAT %dL\n", bpb * sizeof(float));
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printf("#define PR_BITS_PER_DOUBLE %dL\n", bpb * sizeof(double));
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printf("#define PR_BITS_PER_WORD %dL\n", bpb * sizeof(prword));
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printf("\n");
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printf("#define PR_BITS_PER_BYTE_LOG2 %dL\n", Log2(bpb));
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printf("#define PR_BITS_PER_SHORT_LOG2 %dL\n", Log2(bpb * sizeof(short)));
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printf("#define PR_BITS_PER_INT_LOG2 %dL\n", Log2(bpb * sizeof(int)));
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printf("#define PR_BITS_PER_INT64_LOG2 %dL\n", 6);
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printf("#define PR_BITS_PER_LONG_LOG2 %dL\n", Log2(bpb * sizeof(long)));
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printf("#define PR_BITS_PER_FLOAT_LOG2 %dL\n", Log2(bpb * sizeof(float)));
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printf("#define PR_BITS_PER_DOUBLE_LOG2 %dL\n", Log2(bpb * sizeof(double)));
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printf("#define PR_BITS_PER_WORD_LOG2 %dL\n", Log2(bpb * sizeof(prword)));
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printf("\n");
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printf("#define PR_ALIGN_OF_SHORT %dL\n", ALIGN_OF(short));
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printf("#define PR_ALIGN_OF_INT %dL\n", ALIGN_OF(int));
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printf("#define PR_ALIGN_OF_LONG %dL\n", ALIGN_OF(long));
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if (sizeof(INT64) < 8) {
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/* this machine doesn't actually support int64's */
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printf("#define PR_ALIGN_OF_INT64 %dL\n", ALIGN_OF(fakelonglong));
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} else {
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printf("#define PR_ALIGN_OF_INT64 %dL\n", ALIGN_OF(int64));
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}
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printf("#define PR_ALIGN_OF_FLOAT %dL\n", ALIGN_OF(float));
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printf("#define PR_ALIGN_OF_DOUBLE %dL\n", ALIGN_OF(double));
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printf("#define PR_ALIGN_OF_POINTER %dL\n", ALIGN_OF(pointer));
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printf("#define PR_ALIGN_OF_WORD %dL\n", ALIGN_OF(prword));
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printf("\n");
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printf("#define PR_BYTES_PER_WORD_LOG2 %dL\n", Log2(sizeof(prword)));
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printf("#define PR_BYTES_PER_DWORD_LOG2 %dL\n", Log2(8));
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printf("#define PR_WORDS_PER_DWORD_LOG2 %dL\n", Log2(8/sizeof(prword)));
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printf("\n");
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printf("#endif /* nspr_cpucfg___ */\n");
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return 0;
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}
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