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Don't boundcheck 64-bit numbers, it gives problems due to overflows

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This commit is contained in:
Victor van den Elzen 2009-11-11 07:39:21 +01:00
parent cfe46ecfec
commit b9856a266e
1 changed files with 27 additions and 9 deletions
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36
nasmlib.h
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@ -395,27 +395,45 @@ size_t fwritezero(size_t bytes, FILE *fp);
static inline bool overflow_general(int64_t value, int bytes)
{
int sbit = (bytes << 3) - 1;
int64_t vmax = ((int64_t)2 << sbit) - 1;
int64_t vmin = -((int64_t)1 << sbit);
int sbit;
int64_t vmax, vmin;
if (bytes >= 8)
return false;
sbit = (bytes << 3) - 1;
vmax = ((int64_t)2 << sbit) - 1;
vmin = -((int64_t)1 << sbit);
return value < vmin || value > vmax;
}
static inline bool overflow_signed(int64_t value, int bytes)
{
int sbit = (bytes << 3) - 1;
int64_t vmax = ((int64_t)1 << sbit) - 1;
int64_t vmin = -((int64_t)1 << sbit);
int sbit;
int64_t vmax, vmin;
if (bytes >= 8)
return false;
sbit = (bytes << 3) - 1;
vmax = ((int64_t)1 << sbit) - 1;
vmin = -((int64_t)1 << sbit);
return value < vmin || value > vmax;
}
static inline bool overflow_unsigned(int64_t value, int bytes)
{
int sbit = (bytes << 3) - 1;
int64_t vmax = ((int64_t)2 << sbit) - 1;
int64_t vmin = 0;
int sbit;
int64_t vmax, vmin;
if (bytes >= 8)
return false;
sbit = (bytes << 3) - 1;
vmax = ((int64_t)2 << sbit) - 1;
vmin = 0;
return value < vmin || value > vmax;
}