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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1985-2009 AT&T Intellectual Property *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Phong Vo <kpv@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
/*
* Glenn Fowler
* AT&T Bell Laboratories
*
* generate align features
*
* NOTE: two's complement binary integral representation assumed
*/
#include "FEATURE/common"
#include <setjmp.h>
union _u_
{
long u1;
char* u2;
double u3;
char u4[1024];
intmax_t u5;
uintmax_t u6;
_ast_fltmax_t u7;
void* u8;
char* (*u9)();
jmp_buf u10;
};
struct _s_
{
char s1;
union _u_ s2;
};
#define roundof(x,y) (((x)+((y)-1))&~((y)-1))
static union _u_ u;
static union _u_ v;
int
main()
{
register int i;
register int j;
register int k;
int align0;
int align1;
int align2;
unsigned long bit1;
unsigned long bit2;
unsigned long bits0;
unsigned long bits1;
unsigned long bits2;
u.u2 = u.u4;
v.u2 = u.u2 + 1;
bit1 = u.u1 ^ v.u1;
v.u2 = u.u2 + 2;
bit2 = u.u1 ^ v.u1;
align0 = sizeof(struct _s_) - sizeof(union _u_);
bits0 = 0;
k = 0;
for (j = 0; j < align0; j++)
{
u.u2 = u.u4 + j;
bits1 = 0;
for (i = 0; i < align0; i++)
{
v.u2 = u.u2 + i;
bits1 |= u.u1 ^ v.u1;
}
if (!bits0 || bits1 < bits0)
{
bits0 = bits1;
k = j;
}
}
align1 = roundof(align0, 2);
u.u2 = u.u4 + k;
for (bits1 = bits0; i < align1; i++)
{
v.u2 = u.u2 + i;
bits1 |= u.u1 ^ v.u1;
}
align2 = roundof(align0, 4);
for (bits2 = bits1; i < align2; i++)
{
v.u2 = u.u2 + i;
bits2 |= u.u1 ^ v.u1;
}
printf("typedef unsigned %s ALIGN_INTEGRAL;\n", sizeof(char*) >= sizeof(long) ? "long" : sizeof(char*) >= sizeof(int) ? "int" : "short");
printf("\n");
printf("#define ALIGN_CHUNK %d\n", sizeof(char*) >= 4 ? 8192 : 1024);
printf("#define ALIGN_INTEGRAL %s\n", sizeof(char*) >= sizeof(long) ? "long" : sizeof(char*) >= sizeof(int) ? "int" : "short");
printf("#define ALIGN_INTEGER(x) ((ALIGN_INTEGRAL)(x))\n");
printf("#define ALIGN_POINTER(x) ((char*)(x))\n");
if (bits2 == (align2 - 1)) printf("#define ALIGN_ROUND(x,y) ALIGN_POINTER(ALIGN_INTEGER((x)+(y)-1)&~((y)-1))\n");
else printf("#define ALIGN_ROUND(x,y) ALIGN_POINTER(ALIGN_INTEGER(ALIGN_ALIGN(x)+(((y)+%d)/%d)-1)&~((((y)+%d)/%d)-1))\n", align0, align0, align0, align0);
printf("\n");
if (align0 == align2)
{
printf("#define ALIGN_BOUND ALIGN_BOUND2\n");
printf("#define ALIGN_ALIGN(x) ALIGN_ALIGN2(x)\n");
printf("#define ALIGN_TRUNC(x) ALIGN_TRUNC2(x)\n");
}
else if (align0 == align1)
{
printf("#define ALIGN_BOUND ALIGN_BOUND1\n");
printf("#define ALIGN_ALIGN(x) ALIGN_ALIGN1(x)\n");
printf("#define ALIGN_TRUNC(x) ALIGN_TRUNC1(x)\n");
}
else
{
printf("#define ALIGN_BOUND 1\n");
printf("#define ALIGN_ALIGN(x) ALIGN_POINTER(x)\n");
printf("#define ALIGN_TRUNC(x) ALIGN_POINTER(x)\n");
}
printf("\n");
printf("#define ALIGN_BIT1 0x%lx\n", bit1);
if (align1 == align2)
{
printf("#define ALIGN_BOUND1 ALIGN_BOUND2\n");
printf("#define ALIGN_ALIGN1(x) ALIGN_ALIGN2(x)\n");
printf("#define ALIGN_TRUNC1(x) ALIGN_TRUNC2(x)\n");
}
else
{
printf("#define ALIGN_BOUND1 %d\n", align1);
printf("#define ALIGN_ALIGN1(x) ALIGN_TRUNC1((x)+%d)\n", align1 - 1);
printf("#define ALIGN_TRUNC1(x) ALIGN_POINTER(ALIGN_INTEGER((x)+%d)&0x%lx)\n", align1 - 1, ~(bits0|bits1));
}
printf("#define ALIGN_CLRBIT1(x) ALIGN_POINTER(ALIGN_INTEGER(x)&0x%lx)\n", ~bit1);
printf("#define ALIGN_SETBIT1(x) ALIGN_POINTER(ALIGN_INTEGER(x)|0x%lx)\n", bit1);
printf("#define ALIGN_TSTBIT1(x) ALIGN_POINTER(ALIGN_INTEGER(x)&0x%lx)\n", bit1);
printf("\n");
printf("#define ALIGN_BIT2 0x%lx\n", bit2);
printf("#define ALIGN_BOUND2 %d\n", align2);
printf("#define ALIGN_ALIGN2(x) ALIGN_TRUNC2((x)+%d)\n", align2 - 1);
printf("#define ALIGN_TRUNC2(x) ALIGN_POINTER(ALIGN_INTEGER(x)&0x%lx)\n", ~(bits0|bits1|bits2));
printf("#define ALIGN_CLRBIT2(x) ALIGN_POINTER(ALIGN_INTEGER(x)&0x%lx)\n", ~bit2);
printf("#define ALIGN_SETBIT2(x) ALIGN_POINTER(ALIGN_INTEGER(x)|0x%lx)\n", bit2);
printf("#define ALIGN_TSTBIT2(x) ALIGN_POINTER(ALIGN_INTEGER(x)&0x%lx)\n", bit2);
printf("\n");
return 0;
}
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