mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-19 04:29:21 +00:00
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1446 91177308-0d34-0410-b5e6-96231b3b80d8
271 lines
7.7 KiB
C
271 lines
7.7 KiB
C
//===-- RuntimeLib.lc - LLVM Standard C Runtime Library -----------*- C -*-===//
|
|
//
|
|
// This file contains definitions of C functions that are useful to get LLVM
|
|
// programs up and running. This library of functions is automatically linked
|
|
// into programs loaded into LLI.
|
|
//
|
|
// This file is compiled by the LLVM port of GCC to get LLVM code.
|
|
//
|
|
// A lot of this code is ripped gratuitously from glibc and libiberty.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include <stdlib.h>
|
|
|
|
// Prototypes for functions exported by LLI directly.
|
|
void exit(int Code);
|
|
int putchar(int);
|
|
void *malloc(unsigned);
|
|
void free(void *);
|
|
|
|
#define isspace(x) ((x) == ' ' || (x) == '\t' || (x) == '\n')
|
|
#define isdigit(x) ((x) >= '0' && (x) <= '9')
|
|
#define isupper(x) ((x) >= 'A' && (x) <= 'Z')
|
|
#define islower(x) ((x) >= 'a' && (x) <= 'z')
|
|
#define isalpha(x) (isupper(x) || islower(x))
|
|
|
|
// The puts() function writes the string pointed to by s, followed by a
|
|
// NEWLINE character, to the standard output stream stdout. On success the
|
|
// number of characters written is returned; otherwise they return EOF.
|
|
//
|
|
int puts(const char *S) {
|
|
const char *Str = S;
|
|
while (*Str) putchar(*Str++);
|
|
putchar('\n');
|
|
return Str+1-S;
|
|
}
|
|
|
|
|
|
#ifndef ULONG_MAX
|
|
#define ULONG_MAX ((unsigned long)(~0L)) /* 0xFFFFFFFF */
|
|
#endif
|
|
|
|
#ifndef LONG_MAX
|
|
#define LONG_MAX ((long)(ULONG_MAX >> 1)) /* 0x7FFFFFFF */
|
|
#endif
|
|
|
|
#ifndef LONG_MIN
|
|
#define LONG_MIN ((long)(~LONG_MAX)) /* 0x80000000 */
|
|
#endif
|
|
|
|
/*
|
|
* Convert a string to a long integer.
|
|
*
|
|
* Ignores `locale' stuff. Assumes that the upper and lower case
|
|
* alphabets and digits are each contiguous.
|
|
*/
|
|
long strtol(const char *nptr, char **endptr, int base) {
|
|
register const char *s = nptr;
|
|
register unsigned long acc;
|
|
register int c;
|
|
register unsigned long cutoff;
|
|
register int neg = 0, any, cutlim;
|
|
|
|
/*
|
|
* Skip white space and pick up leading +/- sign if any.
|
|
* If base is 0, allow 0x for hex and 0 for octal, else
|
|
* assume decimal; if base is already 16, allow 0x.
|
|
*/
|
|
do {
|
|
c = *s++;
|
|
} while (isspace(c));
|
|
if (c == '-') {
|
|
neg = 1;
|
|
c = *s++;
|
|
} else if (c == '+')
|
|
c = *s++;
|
|
if ((base == 0 || base == 16) &&
|
|
c == '0' && (*s == 'x' || *s == 'X')) {
|
|
c = s[1];
|
|
s += 2;
|
|
base = 16;
|
|
}
|
|
if (base == 0)
|
|
base = c == '0' ? 8 : 10;
|
|
|
|
/*
|
|
* Compute the cutoff value between legal numbers and illegal
|
|
* numbers. That is the largest legal value, divided by the
|
|
* base. An input number that is greater than this value, if
|
|
* followed by a legal input character, is too big. One that
|
|
* is equal to this value may be valid or not; the limit
|
|
* between valid and invalid numbers is then based on the last
|
|
* digit. For instance, if the range for longs is
|
|
* [-2147483648..2147483647] and the input base is 10,
|
|
* cutoff will be set to 214748364 and cutlim to either
|
|
* 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated
|
|
* a value > 214748364, or equal but the next digit is > 7 (or 8),
|
|
* the number is too big, and we will return a range error.
|
|
*
|
|
* Set any if any `digits' consumed; make it negative to indicate
|
|
* overflow.
|
|
*/
|
|
cutoff = neg ? -(unsigned long)LONG_MIN : LONG_MAX;
|
|
cutlim = cutoff % (unsigned long)base;
|
|
cutoff /= (unsigned long)base;
|
|
for (acc = 0, any = 0;; c = *s++) {
|
|
if (isdigit(c))
|
|
c -= '0';
|
|
else if (isalpha(c))
|
|
c -= isupper(c) ? 'A' - 10 : 'a' - 10;
|
|
else
|
|
break;
|
|
if (c >= base)
|
|
break;
|
|
if (any < 0 || acc > cutoff || acc == cutoff && c > cutlim)
|
|
any = -1;
|
|
else {
|
|
any = 1;
|
|
acc *= base;
|
|
acc += c;
|
|
}
|
|
}
|
|
if (any < 0) {
|
|
acc = neg ? LONG_MIN : LONG_MAX;
|
|
} else if (neg)
|
|
acc = -acc;
|
|
if (endptr != 0)
|
|
*endptr = (char *) (any ? s - 1 : nptr);
|
|
return (acc);
|
|
}
|
|
|
|
|
|
/* Convert a string to an int. */
|
|
int atoi(const char *nptr) {
|
|
return (int)strtol(nptr, 0, 10);
|
|
}
|
|
|
|
/* Convert a string to a long int. */
|
|
long int atol(const char *nptr) {
|
|
return strtol(nptr, 0, 10);
|
|
}
|
|
|
|
|
|
unsigned strlen(const char *Str) {
|
|
int Count = 0;
|
|
while (*Str) { ++Count; ++Str; }
|
|
return Count;
|
|
}
|
|
|
|
char *strdup(const char *str) {
|
|
int Len = strlen(str);
|
|
char *Result = (char*)malloc((Len+1)*sizeof(char));
|
|
memcpy(Result, str, Len+1);
|
|
return Result;
|
|
}
|
|
|
|
|
|
/* Compare S1 and S2, returning less than, equal to or
|
|
greater than zero if S1 is lexicographically less than,
|
|
equal to or greater than S2. */
|
|
int strcmp (const char *p1, const char *p2) {
|
|
register const unsigned char *s1 = (const unsigned char *) p1;
|
|
register const unsigned char *s2 = (const unsigned char *) p2;
|
|
unsigned char c1, c2;
|
|
|
|
do
|
|
{
|
|
c1 = (unsigned char) *s1++;
|
|
c2 = (unsigned char) *s2++;
|
|
if (c1 == '\0')
|
|
return c1 - c2;
|
|
}
|
|
while (c1 == c2);
|
|
|
|
return c1 - c2;
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// memory stuff...
|
|
//===----------------------------------------------------------------------===//
|
|
// http://sources.redhat.com/cgi-bin/cvsweb.cgi/libc/sysdeps/generic/?cvsroot=glibc
|
|
|
|
typedef unsigned int op_t;
|
|
#define OPSIZ 4
|
|
|
|
void *memset (void *dstpp, int c, size_t len) {
|
|
long long int dstp = (long long int) dstpp;
|
|
|
|
if (len >= 8)
|
|
{
|
|
size_t xlen;
|
|
op_t cccc;
|
|
|
|
cccc = (unsigned char) c;
|
|
cccc |= cccc << 8;
|
|
cccc |= cccc << 16;
|
|
if (OPSIZ > 4)
|
|
/* Do the shift in two steps to avoid warning if long has 32 bits. */
|
|
cccc |= (cccc << 16) << 16;
|
|
|
|
/* There are at least some bytes to set.
|
|
No need to test for LEN == 0 in this alignment loop. */
|
|
while (dstp % OPSIZ != 0)
|
|
{
|
|
((unsigned char *) dstp)[0] = c;
|
|
dstp += 1;
|
|
len -= 1;
|
|
}
|
|
|
|
/* Write 8 `op_t' per iteration until less than 8 `op_t' remain. */
|
|
xlen = len / (OPSIZ * 8);
|
|
while (xlen > 0)
|
|
{
|
|
((op_t *) dstp)[0] = cccc;
|
|
((op_t *) dstp)[1] = cccc;
|
|
((op_t *) dstp)[2] = cccc;
|
|
((op_t *) dstp)[3] = cccc;
|
|
((op_t *) dstp)[4] = cccc;
|
|
((op_t *) dstp)[5] = cccc;
|
|
((op_t *) dstp)[6] = cccc;
|
|
((op_t *) dstp)[7] = cccc;
|
|
dstp += 8 * OPSIZ;
|
|
xlen -= 1;
|
|
}
|
|
len %= OPSIZ * 8;
|
|
|
|
/* Write 1 `op_t' per iteration until less than OPSIZ bytes remain. */
|
|
xlen = len / OPSIZ;
|
|
while (xlen > 0)
|
|
{
|
|
((op_t *) dstp)[0] = cccc;
|
|
dstp += OPSIZ;
|
|
xlen -= 1;
|
|
}
|
|
len %= OPSIZ;
|
|
}
|
|
|
|
/* Write the last few bytes. */
|
|
while (len > 0)
|
|
{
|
|
((unsigned char *) dstp)[0] = c;
|
|
dstp += 1;
|
|
len -= 1;
|
|
}
|
|
|
|
return dstpp;
|
|
}
|
|
|
|
void *memcpy(void *dstpp, const void *srcpp, size_t len) {
|
|
char *dstp = (char*)dstpp;
|
|
char *srcp = (char*) srcpp;
|
|
unsigned i;
|
|
|
|
for (i = 0; i < len; ++i)
|
|
dstp[i] = srcp[i];
|
|
|
|
return dstpp;
|
|
}
|
|
|
|
void *calloc(size_t nelem, size_t elsize) {
|
|
void *Result = malloc(nelem*elsize);
|
|
return memset(Result, 0, nelem*elsize);
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// libm stuff...
|
|
//===----------------------------------------------------------------------===//
|
|
|