diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | math/test-misc.c | 169 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/s_nextafterl.c | 7 |
3 files changed, 169 insertions, 15 deletions
@@ -1,3 +1,11 @@ +2000-12-20 Ulrich Drepper <drepper@redhat.com> + + * math/test-misc.c: Add more tests for nextafter functions. + + * sysdeps/i386/fpu/s_nextafterl.c: Handle change from denormal to + normal correctly. Correct test for sign. + Based on a patch by HJ Lu. + 2000-12-19 Ulrich Drepper <drepper@redhat.com> * Makeconfig (preprocess-version): Add -traditional to gcc call. diff --git a/math/test-misc.c b/math/test-misc.c index 524644d5bd..1c9c2a514c 100644 --- a/math/test-misc.c +++ b/math/test-misc.c @@ -18,6 +18,7 @@ Boston, MA 02111-1307, USA. */ #include <fenv.h> +#include <ieee754.h> #include <math.h> #include <stdio.h> #include <string.h> @@ -115,9 +116,11 @@ main (void) } { + union ieee754_float v1; + union ieee754_float v2; float f; - f = FLT_MIN; + v1.f = f = FLT_MIN; if (fpclassify (f) != FP_NORMAL) { printf ("fpclassify (FLT_MIN) failed: %d\n", fpclassify (f)); @@ -129,7 +132,7 @@ main (void) printf ("fpclassify (FLT_MIN-epsilon) failed: %d\n", fpclassify (f)); result = 1; } - f = nextafterf (f, FLT_MIN); + v2.f = f = nextafterf (f, FLT_MIN); if (fpclassify (f) != FP_NORMAL) { printf ("fpclassify (FLT_MIN-epsilon+epsilon) failed: %d\n", @@ -137,7 +140,26 @@ main (void) result = 1; } - f = -FLT_MIN; + if (v1.ieee.mantissa != v2.ieee.mantissa) + { + printf ("FLT_MIN: mantissa differs: %8x vs %8x\n", + v1.ieee.mantissa, v2.ieee.mantissa); + result = 1; + } + if (v1.ieee.exponent != v2.ieee.exponent) + { + printf ("FLT_MIN: exponent differs: %4x vs %4x\n", + v1.ieee.exponent, v2.ieee.exponent); + result = 1; + } + if (v1.ieee.negative != v2.ieee.negative) + { + printf ("FLT_MIN: negative differs: %d vs %d\n", + v1.ieee.negative, v2.ieee.negative); + result = 1; + } + + v1.f = f = -FLT_MIN; if (fpclassify (f) != FP_NORMAL) { printf ("fpclassify (-FLT_MIN) failed: %d\n", fpclassify (f)); @@ -149,7 +171,7 @@ main (void) printf ("fpclassify (-FLT_MIN-epsilon) failed: %d\n", fpclassify (f)); result = 1; } - f = nextafterf (f, -FLT_MIN); + v2.f = f = nextafterf (f, -FLT_MIN); if (fpclassify (f) != FP_NORMAL) { printf ("fpclassify (-FLT_MIN-epsilon+epsilon) failed: %d\n", @@ -157,6 +179,25 @@ main (void) result = 1; } + if (v1.ieee.mantissa != v2.ieee.mantissa) + { + printf ("-FLT_MIN: mantissa differs: %8x vs %8x\n", + v1.ieee.mantissa, v2.ieee.mantissa); + result = 1; + } + if (v1.ieee.exponent != v2.ieee.exponent) + { + printf ("-FLT_MIN: exponent differs: %4x vs %4x\n", + v1.ieee.exponent, v2.ieee.exponent); + result = 1; + } + if (v1.ieee.negative != v2.ieee.negative) + { + printf ("-FLT_MIN: negative differs: %d vs %d\n", + v1.ieee.negative, v2.ieee.negative); + result = 1; + } + f = FLT_MAX; if (fpclassify (f) != FP_NORMAL) { @@ -184,9 +225,11 @@ main (void) } } { + union ieee754_double v1; + union ieee754_double v2; double d; - d = DBL_MIN; + v1.d = d = DBL_MIN; if (fpclassify (d) != FP_NORMAL) { printf ("fpclassify (DBL_MIN) failed: %d\n", fpclassify (d)); @@ -198,7 +241,7 @@ main (void) printf ("fpclassify (DBL_MIN-epsilon) failed: %d\n", fpclassify (d)); result = 1; } - d = nextafter (d, DBL_MIN); + v2.d = d = nextafter (d, DBL_MIN); if (fpclassify (d) != FP_NORMAL) { printf ("fpclassify (DBL_MIN-epsilon+epsilon) failed: %d\n", @@ -206,7 +249,32 @@ main (void) result = 1; } - d = -DBL_MIN; + if (v1.ieee.mantissa0 != v2.ieee.mantissa0) + { + printf ("DBL_MIN: mantissa0 differs: %8x vs %8x\n", + v1.ieee.mantissa0, v2.ieee.mantissa0); + result = 1; + } + if (v1.ieee.mantissa1 != v2.ieee.mantissa1) + { + printf ("DBL_MIN: mantissa1 differs: %8x vs %8x\n", + v1.ieee.mantissa1, v2.ieee.mantissa1); + result = 1; + } + if (v1.ieee.exponent != v2.ieee.exponent) + { + printf ("DBL_MIN: exponent differs: %4x vs %4x\n", + v1.ieee.exponent, v2.ieee.exponent); + result = 1; + } + if (v1.ieee.negative != v2.ieee.negative) + { + printf ("DBL_MIN: negative differs: %d vs %d\n", + v1.ieee.negative, v2.ieee.negative); + result = 1; + } + + v1.d = d = -DBL_MIN; if (fpclassify (d) != FP_NORMAL) { printf ("fpclassify (-DBL_MIN) failed: %d\n", fpclassify (d)); @@ -218,7 +286,7 @@ main (void) printf ("fpclassify (-DBL_MIN-epsilon) failed: %d\n", fpclassify (d)); result = 1; } - d = nextafter (d, -DBL_MIN); + v2.d = d = nextafter (d, -DBL_MIN); if (fpclassify (d) != FP_NORMAL) { printf ("fpclassify (-DBL_MIN-epsilon+epsilon) failed: %d\n", @@ -226,6 +294,31 @@ main (void) result = 1; } + if (v1.ieee.mantissa0 != v2.ieee.mantissa0) + { + printf ("-DBL_MIN: mantissa0 differs: %8x vs %8x\n", + v1.ieee.mantissa0, v2.ieee.mantissa0); + result = 1; + } + if (v1.ieee.mantissa1 != v2.ieee.mantissa1) + { + printf ("-DBL_MIN: mantissa1 differs: %8x vs %8x\n", + v1.ieee.mantissa1, v2.ieee.mantissa1); + result = 1; + } + if (v1.ieee.exponent != v2.ieee.exponent) + { + printf ("-DBL_MIN: exponent differs: %4x vs %4x\n", + v1.ieee.exponent, v2.ieee.exponent); + result = 1; + } + if (v1.ieee.negative != v2.ieee.negative) + { + printf ("-DBL_MIN: negative differs: %d vs %d\n", + v1.ieee.negative, v2.ieee.negative); + result = 1; + } + d = DBL_MAX; if (fpclassify (d) != FP_NORMAL) { @@ -254,9 +347,11 @@ main (void) } #ifndef NO_LONG_DOUBLE { + union ieee854_long_double v1; + union ieee854_long_double v2; long double ld; - ld = LDBL_MIN; + v1.d = ld = LDBL_MIN; if (fpclassify (ld) != FP_NORMAL) { printf ("fpclassify (LDBL_MIN) failed: %d\n", fpclassify (ld)); @@ -269,7 +364,7 @@ main (void) fpclassify (ld), ld); result = 1; } - ld = nextafterl (ld, LDBL_MIN); + v2.d = ld = nextafterl (ld, LDBL_MIN); if (fpclassify (ld) != FP_NORMAL) { printf ("fpclassify (LDBL_MIN-epsilon+epsilon) failed: %d (%La)\n", @@ -277,7 +372,32 @@ main (void) result = 1; } - ld = -LDBL_MIN; + if (v1.ieee.mantissa0 != v2.ieee.mantissa0) + { + printf ("LDBL_MIN: mantissa0 differs: %8x vs %8x\n", + v1.ieee.mantissa0, v2.ieee.mantissa0); + result = 1; + } + if (v1.ieee.mantissa1 != v2.ieee.mantissa1) + { + printf ("LDBL_MIN: mantissa1 differs: %8x vs %8x\n", + v1.ieee.mantissa1, v2.ieee.mantissa1); + result = 1; + } + if (v1.ieee.exponent != v2.ieee.exponent) + { + printf ("LDBL_MIN: exponent differs: %4x vs %4x\n", + v1.ieee.exponent, v2.ieee.exponent); + result = 1; + } + if (v1.ieee.negative != v2.ieee.negative) + { + printf ("LDBL_MIN: negative differs: %d vs %d\n", + v1.ieee.negative, v2.ieee.negative); + result = 1; + } + + v1.d = ld = -LDBL_MIN; if (fpclassify (ld) != FP_NORMAL) { printf ("fpclassify (-LDBL_MIN) failed: %d\n", fpclassify (ld)); @@ -290,7 +410,7 @@ main (void) fpclassify (ld), ld); result = 1; } - ld = nextafterl (ld, -LDBL_MIN); + v2.d = ld = nextafterl (ld, -LDBL_MIN); if (fpclassify (ld) != FP_NORMAL) { printf ("fpclassify (-LDBL_MIN-epsilon+epsilon) failed: %d (%La)\n", @@ -298,6 +418,31 @@ main (void) result = 1; } + if (v1.ieee.mantissa0 != v2.ieee.mantissa0) + { + printf ("-LDBL_MIN: mantissa0 differs: %8x vs %8x\n", + v1.ieee.mantissa0, v2.ieee.mantissa0); + result = 1; + } + if (v1.ieee.mantissa1 != v2.ieee.mantissa1) + { + printf ("-LDBL_MIN: mantissa1 differs: %8x vs %8x\n", + v1.ieee.mantissa1, v2.ieee.mantissa1); + result = 1; + } + if (v1.ieee.exponent != v2.ieee.exponent) + { + printf ("-LDBL_MIN: exponent differs: %4x vs %4x\n", + v1.ieee.exponent, v2.ieee.exponent); + result = 1; + } + if (v1.ieee.negative != v2.ieee.negative) + { + printf ("-LDBL_MIN: negative differs: %d vs %d\n", + v1.ieee.negative, v2.ieee.negative); + result = 1; + } + ld = LDBL_MAX; if (fpclassify (ld) != FP_NORMAL) { diff --git a/sysdeps/i386/fpu/s_nextafterl.c b/sysdeps/i386/fpu/s_nextafterl.c index 2943a613e3..89adf04aec 100644 --- a/sysdeps/i386/fpu/s_nextafterl.c +++ b/sysdeps/i386/fpu/s_nextafterl.c @@ -56,7 +56,7 @@ static char rcsid[] = "$NetBSD: $"; y = x*x; if(y==x) return y; else return x; /* raise underflow flag */ } - if(esx<0x8000) { /* x > 0 */ + if(esx>=0) { /* x > 0 */ if(ix>iy||((ix==iy) && (hx>hy||((hx==hy)&&(lx>ly))))) { /* x > y, x -= ulp */ if(lx==0) { @@ -77,7 +77,7 @@ static char rcsid[] = "$NetBSD: $"; lx += 1; if(lx==0) { hx += 1; - if (hx==0) + if (hx==0 || (esx == 0 && hx == 0x80000000)) esx += 1; } } @@ -102,7 +102,8 @@ static char rcsid[] = "$NetBSD: $"; lx += 1; if(lx==0) { hx += 1; - if (hx==0) esx += 1; + if (hx==0 || (esx == 0xffff8000 && hx == 0x80000000)) + esx += 1; } } } |