diff options
Diffstat (limited to 'math')
| -rw-r--r-- | math/basic-test.c | 36 | ||||
| -rw-r--r-- | math/bug-nextafter.c | 255 | ||||
| -rw-r--r-- | math/bug-nexttoward.c | 255 | ||||
| -rw-r--r-- | math/libm-test.inc | 16 | ||||
| -rw-r--r-- | math/math_private.h | 6 | ||||
| -rw-r--r-- | math/s_nextafter.c | 20 | ||||
| -rw-r--r-- | math/s_nexttowardf.c | 21 | ||||
| -rw-r--r-- | math/test-misc.c | 74 |
8 files changed, 648 insertions, 35 deletions
diff --git a/math/basic-test.c b/math/basic-test.c index e42c014572..e48a3ae4e0 100644 --- a/math/basic-test.c +++ b/math/basic-test.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1999 Free Software Foundation, Inc. +/* Copyright (C) 1999, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Jaeger <aj@suse.de>, 1999. @@ -44,7 +44,7 @@ NAME (void) \ \ zero_var = 0.0; \ one_var = 1.0; \ - NaN_var = zero_var/zero_var; \ + NaN_var = zero_var / zero_var; \ Inf_var = one_var / zero_var; \ \ (void) &zero_var; \ @@ -103,21 +103,51 @@ NAME (void) \ check (#FLOAT " isinf (-HUGE_VALx) == -1", isinf (x1) == -1); \ } +#define TEST_TRUNC(NAME, FLOAT, DOUBLE) \ +void \ +NAME (void) \ +{ \ + volatile DOUBLE Inf_var, NaN_var, zero_var, one_var; \ + FLOAT x1, x2; \ + \ + zero_var = 0.0; \ + one_var = 1.0; \ + NaN_var = zero_var / zero_var; \ + Inf_var = one_var / zero_var; \ + \ + (void) &NaN_var; \ + (void) &Inf_var; \ + \ + x1 = (FLOAT) NaN_var; \ + check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") NaN", isnan (x1) != 0); \ + x2 = (FLOAT) Inf_var; \ + check (" "#FLOAT" x = ("#FLOAT") ("#DOUBLE") Inf", isinf (x2) != 0); \ +} + TEST_FUNC (float_test, float, nanf, FLT_EPSILON, HUGE_VALF) TEST_FUNC (double_test, double, nan, DBL_EPSILON, HUGE_VAL) +TEST_TRUNC (truncdfsf_test, float, double) #ifndef NO_LONG_DOUBLE TEST_FUNC (ldouble_test, long double, nanl, LDBL_EPSILON, HUGE_VALL) +TEST_TRUNC (trunctfsf_test, float, long double) +TEST_TRUNC (trunctfdf_test, double, long double) #endif int -main (void) +do_test (void) { float_test (); double_test (); + truncdfsf_test(); #ifndef NO_LONG_DOUBLE ldouble_test (); + trunctfsf_test(); + trunctfdf_test(); #endif return errors != 0; } + +#define TEST_FUNCTION do_test () +#include "../test-skeleton.c" diff --git a/math/bug-nextafter.c b/math/bug-nextafter.c index 2a967c75bf..1d21841ea6 100644 --- a/math/bug-nextafter.c +++ b/math/bug-nextafter.c @@ -4,6 +4,9 @@ #include <stdlib.h> #include <stdio.h> +float zero = 0.0; +float inf = INFINITY; + int main (void) { @@ -34,6 +37,81 @@ main (void) ++result; } + i = 0; + m = FLT_MIN; + feclearexcept (FE_ALL_EXCEPT); + i = nextafterf (m, i); + if (i < 0 || i >= FLT_MIN) + { + puts ("nextafterf+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterf+ did not underflow"); + ++result; + } + i = 0; + feclearexcept (FE_ALL_EXCEPT); + i = nextafterf (-m, -i); + if (i > 0 || i <= -FLT_MIN) + { + puts ("nextafterf- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterf- did not underflow"); + ++result; + } + i = -INFINITY; + feclearexcept (FE_ALL_EXCEPT); + m = nextafterf (zero, inf); + if (m < 0.0 || m >= FLT_MIN) + { + puts ("nextafterf+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterf+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nextafterf (m, i) != 0.0) + { + puts ("nextafterf+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterf+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + m = nextafterf (copysignf (zero, -1.0), -inf); + if (m > 0.0 || m <= -FLT_MIN) + { + puts ("nextafterf- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterf- did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nextafterf (m, -i) != 0.0) + { + puts ("nextafterf- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterf- did not underflow"); + ++result; + } + double di = INFINITY; double dm = DBL_MAX; feclearexcept (FE_ALL_EXCEPT); @@ -59,5 +137,182 @@ main (void) ++result; } + di = 0; + dm = DBL_MIN; + feclearexcept (FE_ALL_EXCEPT); + di = nextafter (dm, di); + if (di < 0 || di >= DBL_MIN) + { + puts ("nextafter+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafter+ did not underflow"); + ++result; + } + di = 0; + feclearexcept (FE_ALL_EXCEPT); + di = nextafter (-dm, -di); + if (di > 0 || di <= -DBL_MIN) + { + puts ("nextafter- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafter- did not underflow"); + ++result; + } + di = -INFINITY; + feclearexcept (FE_ALL_EXCEPT); + dm = nextafter (zero, inf); + if (dm < 0.0 || dm >= DBL_MIN) + { + puts ("nextafter+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafter+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nextafter (dm, di) != 0.0) + { + puts ("nextafter+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafter+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + dm = nextafter (copysign (zero, -1.0), -inf); + if (dm > 0.0 || dm <= -DBL_MIN) + { + puts ("nextafter- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafter- did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nextafter (dm, -di) != 0.0) + { + puts ("nextafter- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafter- did not underflow"); + ++result; + } + +#ifndef NO_LONG_DOUBLE + long double li = INFINITY; + long double lm = LDBL_MAX; + feclearexcept (FE_ALL_EXCEPT); + if (nextafterl (lm, li) != li) + { + puts ("nextafterl+ failed"); + ++result; + } + if (fetestexcept (FE_OVERFLOW) == 0) + { + puts ("nextafterl+ did not overflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nextafterl (-lm, -li) != -li) + { + puts ("nextafterl failed"); + ++result; + } + if (fetestexcept (FE_OVERFLOW) == 0) + { + puts ("nextafterl- did not overflow"); + ++result; + } + + li = 0; + lm = LDBL_MIN; + feclearexcept (FE_ALL_EXCEPT); + li = nextafterl (lm, li); + if (li < 0 || li >= LDBL_MIN) + { + puts ("nextafterl+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterl+ did not underflow"); + ++result; + } + li = 0; + feclearexcept (FE_ALL_EXCEPT); + li = nextafterl (-lm, -li); + if (li > 0 || li <= -LDBL_MIN) + { + puts ("nextafterl- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterl- did not underflow"); + ++result; + } + li = -INFINITY; + feclearexcept (FE_ALL_EXCEPT); + lm = nextafterl (zero, inf); + if (lm < 0.0 || lm >= LDBL_MIN) + { + puts ("nextafterl+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterl+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nextafterl (lm, li) != 0.0) + { + puts ("nextafterl+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterl+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + lm = nextafterl (copysign (zero, -1.0), -inf); + if (lm > 0.0 || lm <= -LDBL_MIN) + { + puts ("nextafterl- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterl- did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nextafterl (lm, -li) != 0.0) + { + puts ("nextafterl- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nextafterl- did not underflow"); + ++result; + } +#endif + return result; } diff --git a/math/bug-nexttoward.c b/math/bug-nexttoward.c index e306a129c2..ff57e5e3f5 100644 --- a/math/bug-nexttoward.c +++ b/math/bug-nexttoward.c @@ -4,6 +4,9 @@ #include <stdlib.h> #include <stdio.h> +float zero = 0.0; +float inf = INFINITY; + int main (void) { @@ -35,6 +38,81 @@ main (void) ++result; } + fi = 0; + m = FLT_MIN; + feclearexcept (FE_ALL_EXCEPT); + fi = nexttowardf (m, fi); + if (fi < 0 || fi >= FLT_MIN) + { + puts ("nexttowardf+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardf+ did not underflow"); + ++result; + } + fi = 0; + feclearexcept (FE_ALL_EXCEPT); + fi = nexttowardf (-m, -fi); + if (fi > 0 || fi <= -FLT_MIN) + { + puts ("nexttowardf- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardf- did not underflow"); + ++result; + } + fi = -INFINITY; + feclearexcept (FE_ALL_EXCEPT); + m = nexttowardf (zero, inf); + if (m < 0.0 || m >= FLT_MIN) + { + puts ("nexttowardf+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardf+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nexttowardf (m, fi) != 0.0) + { + puts ("nexttowardf+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardf+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + m = nexttowardf (copysignf (zero, -1.0), -inf); + if (m > 0.0 || m <= -FLT_MIN) + { + puts ("nexttowardf- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardf- did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nexttowardf (m, -fi) != 0.0) + { + puts ("nexttowardf- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardf- did not underflow"); + ++result; + } + tl = (long double) DBL_MAX + 1.0e305L; double di = INFINITY; double dm = DBL_MAX; @@ -61,5 +139,182 @@ main (void) ++result; } + di = 0; + dm = DBL_MIN; + feclearexcept (FE_ALL_EXCEPT); + di = nexttoward (dm, di); + if (di < 0 || di >= DBL_MIN) + { + puts ("nexttoward+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttoward+ did not underflow"); + ++result; + } + di = 0; + feclearexcept (FE_ALL_EXCEPT); + di = nexttoward (-dm, -di); + if (di > 0 || di <= -DBL_MIN) + { + puts ("nexttoward- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttoward- did not underflow"); + ++result; + } + di = -INFINITY; + feclearexcept (FE_ALL_EXCEPT); + dm = nexttoward (zero, inf); + if (dm < 0.0 || dm >= DBL_MIN) + { + puts ("nexttoward+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttoward+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nexttoward (dm, di) != 0.0) + { + puts ("nexttoward+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttoward+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + dm = nexttoward (copysign (zero, -1.0), -inf); + if (dm > 0.0 || dm <= -DBL_MIN) + { + puts ("nexttoward- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttoward- did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nexttoward (dm, -di) != 0.0) + { + puts ("nexttoward- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttoward- did not underflow"); + ++result; + } + +#ifndef NO_LONG_DOUBLE + long double li = INFINITY; + long double lm = LDBL_MAX; + feclearexcept (FE_ALL_EXCEPT); + if (nexttowardl (lm, li) != li) + { + puts ("nexttowardl+ failed"); + ++result; + } + if (fetestexcept (FE_OVERFLOW) == 0) + { + puts ("nexttowardl+ did not overflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nexttowardl (-lm, -li) != -li) + { + puts ("nexttowardl failed"); + ++result; + } + if (fetestexcept (FE_OVERFLOW) == 0) + { + puts ("nexttowardl- did not overflow"); + ++result; + } + + li = 0; + lm = LDBL_MIN; + feclearexcept (FE_ALL_EXCEPT); + li = nexttowardl (lm, li); + if (li < 0 || li >= LDBL_MIN) + { + puts ("nexttowardl+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardl+ did not underflow"); + ++result; + } + li = 0; + feclearexcept (FE_ALL_EXCEPT); + li = nexttowardl (-lm, -li); + if (li > 0 || li <= -LDBL_MIN) + { + puts ("nexttowardl- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardl- did not underflow"); + ++result; + } + li = -INFINITY; + feclearexcept (FE_ALL_EXCEPT); + lm = nexttowardl (zero, inf); + if (lm < 0.0 || lm >= LDBL_MIN) + { + puts ("nexttowardl+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardl+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nexttowardl (lm, li) != 0.0) + { + puts ("nexttowardl+ failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardl+ did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + lm = nexttowardl (copysign (zero, -1.0), -inf); + if (lm > 0.0 || lm <= -LDBL_MIN) + { + puts ("nexttowardl- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardl- did not underflow"); + ++result; + } + feclearexcept (FE_ALL_EXCEPT); + if (nexttowardl (lm, -li) != 0.0) + { + puts ("nexttowardl- failed"); + ++result; + } + if (fetestexcept (FE_UNDERFLOW) == 0) + { + puts ("nexttowardl- did not underflow"); + ++result; + } +#endif + return result; } diff --git a/math/libm-test.inc b/math/libm-test.inc index 23ee6beaa8..81dd364f77 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -4127,7 +4127,9 @@ log_test (void) TEST_f_f (log, 1, 0); TEST_f_f (log, -1, nan_value, INVALID_EXCEPTION); + TEST_f_f (log, minus_infty, nan_value, INVALID_EXCEPTION); TEST_f_f (log, plus_infty, plus_infty); + TEST_f_f (log, nan_value, nan_value); TEST_f_f (log, M_El, 1); TEST_f_f (log, 1.0 / M_El, -1); @@ -4157,6 +4159,7 @@ log10_test (void) /* log10 (x) == NaN plus invalid exception if x < 0. */ TEST_f_f (log10, -1, nan_value, INVALID_EXCEPTION); + TEST_f_f (log10, minus_infty, nan_value, INVALID_EXCEPTION); TEST_f_f (log10, plus_infty, plus_infty); TEST_f_f (log10, nan_value, nan_value); @@ -4188,6 +4191,7 @@ log1p_test (void) TEST_f_f (log1p, -1, minus_infty, DIVIDE_BY_ZERO_EXCEPTION); TEST_f_f (log1p, -2, nan_value, INVALID_EXCEPTION); + TEST_f_f (log1p, minus_infty, nan_value, INVALID_EXCEPTION); TEST_f_f (log1p, plus_infty, plus_infty); TEST_f_f (log1p, nan_value, nan_value); @@ -4218,6 +4222,7 @@ log2_test (void) TEST_f_f (log2, 1, 0); TEST_f_f (log2, -1, nan_value, INVALID_EXCEPTION); + TEST_f_f (log2, minus_infty, nan_value, INVALID_EXCEPTION); TEST_f_f (log2, plus_infty, plus_infty); TEST_f_f (log2, nan_value, nan_value); @@ -4614,6 +4619,17 @@ pow_test (void) /* pow (x, NaN) == NaN. */ TEST_ff_f (pow, 3.0, nan_value, nan_value); + TEST_ff_f (pow, minus_zero, nan_value, nan_value); + TEST_ff_f (pow, plus_infty, nan_value, nan_value); + TEST_ff_f (pow, -3.0, nan_value, nan_value); + TEST_ff_f (pow, minus_infty, nan_value, nan_value); + + TEST_ff_f (pow, nan_value, 3.0, nan_value); + TEST_ff_f (pow, nan_value, -3.0, nan_value); + TEST_ff_f (pow, nan_value, plus_infty, nan_value); + TEST_ff_f (pow, nan_value, minus_infty, nan_value); + TEST_ff_f (pow, nan_value, 2.5, nan_value); + TEST_ff_f (pow, nan_value, -2.5, nan_value); TEST_ff_f (pow, 1, plus_infty, 1); TEST_ff_f (pow, -1, plus_infty, 1); diff --git a/math/math_private.h b/math/math_private.h index 572e546831..129646f8c5 100644 --- a/math/math_private.h +++ b/math/math_private.h @@ -332,4 +332,10 @@ extern double __slowexp (double __x); extern double __slowpow (double __x, double __y, double __z); extern void __docos (double __x, double __dx, double __v[]); +#ifndef math_opt_barrier +#define math_opt_barrier(x) \ +({ __typeof (x) __x = x; __asm ("" : "+m" (__x)); __x; }) +#define math_force_eval(x) __asm __volatile ("" : : "m" (x)) +#endif + #endif /* _MATH_PRIVATE_H_ */ diff --git a/math/s_nextafter.c b/math/s_nextafter.c index 9c678b79c5..d2af52dda3 100644 --- a/math/s_nextafter.c +++ b/math/s_nextafter.c @@ -26,7 +26,7 @@ static char rcsid[] = "$NetBSD: s_nextafter.c,v 1.8 1995/05/10 20:47:58 jtc Exp #define nexttoward __internal_nexttoward #include <math.h> -#include "math_private.h" +#include <math_private.h> #include <float.h> #ifdef __STDC__ @@ -49,9 +49,12 @@ static char rcsid[] = "$NetBSD: s_nextafter.c,v 1.8 1995/05/10 20:47:58 jtc Exp return x+y; if(x==y) return y; /* x=y, return y */ if((ix|lx)==0) { /* x == 0 */ + double u; INSERT_WORDS(x,hy&0x80000000,1); /* return +-minsubnormal */ - y = x*x; - if(y==x) return y; else return x; /* raise underflow flag */ + u = math_opt_barrier (x); + u = u*u; + math_force_eval (u); /* raise underflow flag */ + return x; } if(hx>=0) { /* x > 0 */ if(hx>hy||((hx==hy)&&(lx>ly))) { /* x > y, x -= ulp */ @@ -74,15 +77,12 @@ static char rcsid[] = "$NetBSD: s_nextafter.c,v 1.8 1995/05/10 20:47:58 jtc Exp if(hy>=0x7ff00000) { x = x+x; /* overflow */ if (FLT_EVAL_METHOD != 0 && FLT_EVAL_METHOD != 1) - asm ("" : "=m"(x) : "m"(x)); + asm ("" : "+m"(x)); return x; /* overflow */ } - if(hy<0x00100000) { /* underflow */ - y = x*x; - if(y!=x) { /* raise underflow flag */ - INSERT_WORDS(y,hx,lx); - return y; - } + if(hy<0x00100000) { + double u = x*x; /* underflow */ + math_force_eval (u); /* raise underflow flag */ } INSERT_WORDS(x,hx,lx); return x; diff --git a/math/s_nexttowardf.c b/math/s_nexttowardf.c index 1a1026612e..0494d1a4e9 100644 --- a/math/s_nexttowardf.c +++ b/math/s_nexttowardf.c @@ -21,7 +21,7 @@ */ #include <math.h> -#include "math_private.h" +#include <math_private.h> #include <float.h> #ifdef __STDC__ @@ -45,10 +45,12 @@ return x+y; if((long double) x==y) return y; /* x=y, return y */ if(ix==0) { /* x == 0 */ - float x2; + float u; SET_FLOAT_WORD(x,(u_int32_t)(hy&0x80000000)|1);/* return +-minsub*/ - x2 = x*x; - if(x2==x) return x2; else return x; /* raise underflow flag */ + u = math_opt_barrier (x); + u = u * u; + math_force_eval (u); /* raise underflow flag */ + return x; } if(hx>=0) { /* x > 0 */ if(hy<0||(ix>>23)>(iy>>20)-0x380 @@ -70,15 +72,12 @@ x = x+x; /* overflow */ if (FLT_EVAL_METHOD != 0) /* Force conversion to float. */ - asm ("" : "=m"(x) : "m"(x)); + asm ("" : "+m"(x)); return x; } - if(hy<0x00800000) { /* underflow */ - float x2 = x*x; - if(x2!=x) { /* raise underflow flag */ - SET_FLOAT_WORD(x2,hx); - return x2; - } + if(hy<0x00800000) { + float u = x*x; /* underflow */ + math_force_eval (u); /* raise underflow flag */ } SET_FLOAT_WORD(x,hx); return x; diff --git a/math/test-misc.c b/math/test-misc.c index d2393cc840..862e11f0c3 100644 --- a/math/test-misc.c +++ b/math/test-misc.c @@ -1,5 +1,5 @@ /* Miscellaneous tests which don't fit anywhere else. - Copyright (C) 2000, 2001, 2004, 2005 Free Software Foundation, Inc. + Copyright (C) 2000, 2001, 2004, 2005, 2007 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -44,7 +44,6 @@ main (void) } } -# if __GNUC__ >= 3 || __GNUC_MINOR__ >= 96 { long double x; long double m; @@ -52,17 +51,17 @@ main (void) int e; int i; -# if LDBL_MANT_DIG == 64 +# if LDBL_MANT_DIG == 64 m = 0xf.fffffffffffffffp-4L; -# elif LDBL_MANT_DIG == 106 +# elif LDBL_MANT_DIG == 106 /* This has to match the mantissa of LDBL_MAX which actually does have a missing bit in the middle. */ m = 0x1.fffffffffffff7ffffffffffff8p-1L; -# elif LDBL_MANT_DIG == 113 +# elif LDBL_MANT_DIG == 113 m = 0x1.ffffffffffffffffffffffffffffp-1L; -# else -# error "Please adjust" -# endif +# else +# error "Please adjust" +# endif for (i = LDBL_MAX_EXP, x = LDBL_MAX; i >= LDBL_MIN_EXP; --i, x /= 2.0L) { @@ -106,9 +105,8 @@ main (void) } } -# endif -#if 0 +# if 0 { int e; long double r = frexpl (LDBL_MIN * LDBL_EPSILON, &e); @@ -126,7 +124,7 @@ main (void) result = 1; } } -#endif +# endif #endif { @@ -1183,5 +1181,59 @@ main (void) } #endif + volatile float f1 = FLT_MAX; + volatile float f2 = FLT_MAX / 2; + (void) &f1; + (void) &f2; + feclearexcept (FE_ALL_EXCEPT); + f2 += f1; + int fe = fetestexcept (FE_ALL_EXCEPT); + if (fe != (FE_OVERFLOW | FE_INEXACT)) + { + printf ("float overflow test failed: %x\n", fe); + result = 1; + } + + volatile double d1 = DBL_MAX; + volatile double d2 = DBL_MAX / 2; + (void) &d1; + (void) &d2; + feclearexcept (FE_ALL_EXCEPT); + d2 += d1; + fe = fetestexcept (FE_ALL_EXCEPT); + if (fe != (FE_OVERFLOW | FE_INEXACT)) + { + printf ("double overflow test failed: %x\n", fe); + result = 1; + } + +#ifndef NO_LONG_DOUBLE + volatile long double ld1 = LDBL_MAX; + volatile long double ld2 = LDBL_MAX / 2; + (void) &ld1; + (void) &ld2; + feclearexcept (FE_ALL_EXCEPT); + ld2 += ld1; + fe = fetestexcept (FE_ALL_EXCEPT); + if (fe != (FE_OVERFLOW | FE_INEXACT)) + { + printf ("long double overflow test failed: %x\n", fe); + result = 1; + } +#endif + +#if !defined NO_LONG_DOUBLE && LDBL_MANT_DIG == 113 + volatile long double ld3 = 0x1.0000000000010000000100000001p+1; + volatile long double ld4 = 0x1.0000000000000000000000000001p+1; + (void) &ld3; + (void) &ld4; + ld3 -= ld4; + if (ld3 != 0x1.0p-47) + { + printf ("long double subtraction test failed %.28La\n", ld3); + result = 1; + } +#endif + return result; } |