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fixed bugs with sizeof() and unnormalized values

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eck 1990-11-09 16:26:15 +00:00
parent 899df7bc78
commit 57b1d9824a
1 changed files with 6 additions and 9 deletions
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15
lang/cem/libcc.ansi/stdlib/ext_comp.c
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@ -431,8 +431,8 @@ static struct EXTEND r_big_ten_powers[] = { /* representation of 10 ** -(28*i) *
{ 0, -1768, 0xD4EEC394, 0xD6258BF8 } { 0, -1768, 0xD4EEC394, 0xD6258BF8 }
}; };
#define TP (sizeof(ten_powers)/sizeof(ten_powers[0])) #define TP (int)(sizeof(ten_powers)/sizeof(ten_powers[0]))
#define BTP (sizeof(big_ten_powers)/sizeof(big_ten_powers[0])) #define BTP (int)(sizeof(big_ten_powers)/sizeof(big_ten_powers[0]))
#define MAX_EXP (TP * BTP - 1) #define MAX_EXP (TP * BTP - 1)
static static
@ -685,7 +685,6 @@ _dbl_ext_cvt(double value, struct EXTEND *e)
} }
static struct EXTEND max_d; static struct EXTEND max_d;
static struct EXTEND min_d;
double double
_ext_dbl_cvt(struct EXTEND *e) _ext_dbl_cvt(struct EXTEND *e)
@ -701,17 +700,15 @@ _ext_dbl_cvt(struct EXTEND *e)
} }
if (max_d.exp == 0) { if (max_d.exp == 0) {
_dbl_ext_cvt(DBL_MAX, &max_d); _dbl_ext_cvt(DBL_MAX, &max_d);
_dbl_ext_cvt(DBL_MIN, &min_d);
} }
if (cmp_ext(e, &min_d) < 0) { if (cmp_ext(&max_d, e) < 0) {
f = 0.0;
errno = ERANGE;
}
else if (cmp_ext(&max_d, e) < 0) {
f = HUGE_VAL; f = HUGE_VAL;
errno = ERANGE; errno = ERANGE;
} }
else f = ldexp(ldexp((double)e->m1, 32) + (double)e->m2, e->exp-63); else f = ldexp(ldexp((double)e->m1, 32) + (double)e->m2, e->exp-63);
if (sign) f = -f; if (sign) f = -f;
if (f == 0.0 && (e->m1 != 0 || e->m2 != 0)) {
errno = ERANGE;
}
return f; return f;
} }