mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-30 21:55:31 +00:00
266 lines
6.3 KiB
C
266 lines
6.3 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include <stdio.h>
|
|
|
|
#if defined(sgi)
|
|
#ifndef IRIX
|
|
error - IRIX is not defined
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(__sun)
|
|
#ifndef SOLARIS
|
|
error - SOLARIS is not defined
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(__hpux)
|
|
#ifndef HPUX
|
|
error - HPUX is not defined
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(__alpha)
|
|
#if !(defined(_WIN32)) && !(defined(OSF1)) && !(defined(__linux)) && !(defined(__FreeBSD__))
|
|
error - None of OSF1, _WIN32, __linux, or __FreeBSD__ is defined
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(_IBMR2)
|
|
#ifndef AIX
|
|
error - AIX is not defined
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(linux)
|
|
#ifndef LINUX
|
|
error - LINUX is not defined
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(bsdi)
|
|
#ifndef BSDI
|
|
error - BSDI is not defined
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(M_UNIX)
|
|
#ifndef SCO
|
|
error - SCO is not defined
|
|
#endif
|
|
#endif
|
|
#if !defined(M_UNIX) && defined(_USLC_)
|
|
#ifndef UNIXWARE
|
|
error - UNIXWARE is not defined
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(__APPLE__)
|
|
#ifndef DARWIN
|
|
error - DARWIN is not defined
|
|
#endif
|
|
#endif
|
|
|
|
/************************************************************************/
|
|
|
|
/* Generate cpucfg.h */
|
|
|
|
#ifdef XP_PC
|
|
#ifdef WIN32
|
|
#define INT64 _PRInt64
|
|
#else
|
|
#define INT64 long
|
|
#endif
|
|
#else
|
|
#if defined(HPUX) || defined(SCO) || defined(UNIXWARE)
|
|
#define INT64 long
|
|
#else
|
|
#define INT64 long long
|
|
#endif
|
|
#endif
|
|
|
|
struct align_short {
|
|
char c;
|
|
short a;
|
|
};
|
|
struct align_int {
|
|
char c;
|
|
int a;
|
|
};
|
|
struct align_long {
|
|
char c;
|
|
long a;
|
|
};
|
|
struct align_PRInt64 {
|
|
char c;
|
|
INT64 a;
|
|
};
|
|
struct align_fakelonglong {
|
|
char c;
|
|
struct {
|
|
long hi, lo;
|
|
} a;
|
|
};
|
|
struct align_float {
|
|
char c;
|
|
float a;
|
|
};
|
|
struct align_double {
|
|
char c;
|
|
double a;
|
|
};
|
|
struct align_pointer {
|
|
char c;
|
|
void *a;
|
|
};
|
|
|
|
#define ALIGN_OF(type) \
|
|
(((char*)&(((struct align_##type *)0)->a)) - ((char*)0))
|
|
|
|
int bpb;
|
|
|
|
/* Used if shell doesn't support redirection. By default, assume it does. */
|
|
FILE *stream;
|
|
|
|
static int Log2(int n)
|
|
{
|
|
int log2 = 0;
|
|
|
|
if (n & (n-1))
|
|
log2++;
|
|
if (n >> 16)
|
|
log2 += 16, n >>= 16;
|
|
if (n >> 8)
|
|
log2 += 8, n >>= 8;
|
|
if (n >> 4)
|
|
log2 += 4, n >>= 4;
|
|
if (n >> 2)
|
|
log2 += 2, n >>= 2;
|
|
if (n >> 1)
|
|
log2++;
|
|
return log2;
|
|
}
|
|
|
|
/* We assume that int's are 32 bits */
|
|
static void do64(void)
|
|
{
|
|
union {
|
|
int i;
|
|
char c[4];
|
|
} u;
|
|
|
|
u.i = 0x01020304;
|
|
if (u.c[0] == 0x01) {
|
|
fprintf(stream, "#undef IS_LITTLE_ENDIAN\n");
|
|
fprintf(stream, "#define IS_BIG_ENDIAN 1\n\n");
|
|
} else {
|
|
fprintf(stream, "#define IS_LITTLE_ENDIAN 1\n");
|
|
fprintf(stream, "#undef IS_BIG_ENDIAN\n\n");
|
|
}
|
|
}
|
|
|
|
static void do32(void)
|
|
{
|
|
union {
|
|
long i;
|
|
char c[4];
|
|
} u;
|
|
|
|
u.i = 0x01020304;
|
|
if (u.c[0] == 0x01) {
|
|
fprintf(stream, "#undef IS_LITTLE_ENDIAN\n");
|
|
fprintf(stream, "#define IS_BIG_ENDIAN 1\n\n");
|
|
} else {
|
|
fprintf(stream, "#define IS_LITTLE_ENDIAN 1\n");
|
|
fprintf(stream, "#undef IS_BIG_ENDIAN\n\n");
|
|
}
|
|
}
|
|
|
|
/*
|
|
** Concievably this could actually be used; but there is lots of code out
|
|
** there with and's and shift's in it that assumes a byte is 8 bits, so
|
|
** forget about porting THIS code to those non 8 bit byte machines.
|
|
*/
|
|
static void BitsPerByte(void)
|
|
{
|
|
bpb = 8;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
BitsPerByte();
|
|
|
|
/* If we got a command line argument, try to use it as the stream. */
|
|
++argv;
|
|
if(*argv) {
|
|
if(!(stream = fopen ( *argv, "wt" ))) {
|
|
fprintf(stderr, "Could not write to output file %s.\n", *argv);
|
|
return 1;
|
|
}
|
|
} else {
|
|
stream = stdout;
|
|
}
|
|
|
|
fprintf(stream, "#ifndef nspr_cpucfg___\n");
|
|
fprintf(stream, "#define nspr_cpucfg___\n\n");
|
|
|
|
fprintf(stream, "/* AUTOMATICALLY GENERATED - DO NOT EDIT */\n\n");
|
|
|
|
if (sizeof(long) == 8) {
|
|
do64();
|
|
} else {
|
|
do32();
|
|
}
|
|
fprintf(stream, "#define PR_BYTES_PER_BYTE %d\n", sizeof(char));
|
|
fprintf(stream, "#define PR_BYTES_PER_SHORT %d\n", sizeof(short));
|
|
fprintf(stream, "#define PR_BYTES_PER_INT %d\n", sizeof(int));
|
|
fprintf(stream, "#define PR_BYTES_PER_INT64 %d\n", 8);
|
|
fprintf(stream, "#define PR_BYTES_PER_LONG %d\n", sizeof(long));
|
|
fprintf(stream, "#define PR_BYTES_PER_FLOAT %d\n", sizeof(float));
|
|
fprintf(stream, "#define PR_BYTES_PER_DOUBLE %d\n\n", sizeof(double));
|
|
|
|
fprintf(stream, "#define PR_BITS_PER_BYTE %d\n", bpb);
|
|
fprintf(stream, "#define PR_BITS_PER_SHORT %d\n", bpb * sizeof(short));
|
|
fprintf(stream, "#define PR_BITS_PER_INT %d\n", bpb * sizeof(int));
|
|
fprintf(stream, "#define PR_BITS_PER_INT64 %d\n", bpb * 8);
|
|
fprintf(stream, "#define PR_BITS_PER_LONG %d\n", bpb * sizeof(long));
|
|
fprintf(stream, "#define PR_BITS_PER_FLOAT %d\n", bpb * sizeof(float));
|
|
fprintf(stream, "#define PR_BITS_PER_DOUBLE %d\n\n",
|
|
bpb * sizeof(double));
|
|
|
|
fprintf(stream, "#define PR_BITS_PER_BYTE_LOG2 %d\n", Log2(bpb));
|
|
fprintf(stream, "#define PR_BITS_PER_SHORT_LOG2 %d\n",
|
|
Log2(bpb * sizeof(short)));
|
|
fprintf(stream, "#define PR_BITS_PER_INT_LOG2 %d\n",
|
|
Log2(bpb * sizeof(int)));
|
|
fprintf(stream, "#define PR_BITS_PER_INT64_LOG2 %d\n", 6);
|
|
fprintf(stream, "#define PR_BITS_PER_LONG_LOG2 %d\n",
|
|
Log2(bpb * sizeof(long)));
|
|
fprintf(stream, "#define PR_BITS_PER_FLOAT_LOG2 %d\n",
|
|
Log2(bpb * sizeof(float)));
|
|
fprintf(stream, "#define PR_BITS_PER_DOUBLE_LOG2 %d\n\n",
|
|
Log2(bpb * sizeof(double)));
|
|
|
|
fprintf(stream, "#define PR_ALIGN_OF_SHORT %d\n", ALIGN_OF(short));
|
|
fprintf(stream, "#define PR_ALIGN_OF_INT %d\n", ALIGN_OF(int));
|
|
fprintf(stream, "#define PR_ALIGN_OF_LONG %d\n", ALIGN_OF(long));
|
|
if (sizeof(INT64) < 8) {
|
|
/* this machine doesn't actually support PRInt64's */
|
|
fprintf(stream, "#define PR_ALIGN_OF_INT64 %d\n",
|
|
ALIGN_OF(fakelonglong));
|
|
} else {
|
|
fprintf(stream, "#define PR_ALIGN_OF_INT64 %d\n", ALIGN_OF(PRInt64));
|
|
}
|
|
fprintf(stream, "#define PR_ALIGN_OF_FLOAT %d\n", ALIGN_OF(float));
|
|
fprintf(stream, "#define PR_ALIGN_OF_DOUBLE %d\n", ALIGN_OF(double));
|
|
fprintf(stream, "#define PR_ALIGN_OF_POINTER %d\n\n", ALIGN_OF(pointer));
|
|
|
|
fprintf(stream, "#endif /* nspr_cpucfg___ */\n");
|
|
fclose(stream);
|
|
|
|
return 0;
|
|
}
|