gecko-dev/js/ref/prcpucfg.c
mccabe%netscape.com acf486a530 modified #if from __alpha to __osf__, because Alpha/Linux also runs on
an alpha processor, and we really want to know osf instead.  Courtesy
wtc.
1998-08-12 19:45:04 +00:00

289 lines
6.7 KiB
C

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