diff options
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | NEWS | 2 | ||||
| -rw-r--r-- | math/libm-test.inc | 41 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/libm-test-ulps | 36 | ||||
| -rw-r--r-- | sysdeps/ieee754/flt-32/k_tanf.c | 2 |
5 files changed, 86 insertions, 3 deletions
diff --git a/ChangeLog b/ChangeLog index 2ba450800c..b48897fc7a 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,13 @@ 2012-07-06 Joseph Myers <joseph@codesourcery.com> + [BZ #14154] + * sysdeps/ieee754/flt-32/k_tanf.c (__kernel_tanf): Use linear + approximation for values within 0x1p-13f of an odd multiple of + pi/4. + * math/libm-test.inc (tan_test): Do not allow spurious underflow + exception. Add more tests. + * sysdeps/i386/fpu/libm-test-ulps: Update. + [BZ #6778] * sysdeps/i386/fpu/s_expm1.S (__expm1): Check for large negative inputs and return -1 for them. Do not check for +Inf in case not diff --git a/NEWS b/NEWS index e07105748b..a727ca95e7 100644 --- a/NEWS +++ b/NEWS @@ -9,7 +9,7 @@ Version 2.17 * The following bugs are resolved with this release: - 6778, 14157, 14283, 14328, 14331 + 6778, 14154, 14157, 14283, 14328, 14331 Version 2.16 diff --git a/math/libm-test.inc b/math/libm-test.inc index b87a40d8d9..27c53a1386 100644 --- a/math/libm-test.inc +++ b/math/libm-test.inc @@ -8405,13 +8405,50 @@ tan_test (void) TEST_f_f (tan, nan_value, nan_value); check_int ("errno for tan(NaN) == 0", errno, 0, 0, 0, 0); - /* Bug 14154: spurious exception may occur. */ - TEST_f_f (tan, M_PI_4l, 1, UNDERFLOW_EXCEPTION_OK_FLOAT); + TEST_f_f (tan, M_PI_4l, 1); TEST_f_f (tan, 0.75L, 0.931596459944072461165202756573936428L); TEST_f_f (tan, 0x1p65, -0.0472364872359047946798414219288370688827L); TEST_f_f (tan, -0x1p65, 0.0472364872359047946798414219288370688827L); + TEST_f_f (tan, 0xc.9p-4, 0.9995162902115457818029468900654150261381L); + TEST_f_f (tan, 0xc.908p-4, 0.9997603425502441410973077452249560802034L); + TEST_f_f (tan, 0xc.90cp-4, 0.9998823910588060302788513970802357770031L); + TEST_f_f (tan, 0xc.90ep-4, 0.9999434208994808753305784795924711152508L); + TEST_f_f (tan, 0xc.90fp-4, 0.9999739372166156702433266059635165160515L); + TEST_f_f (tan, 0xc.90f8p-4, 0.9999891957244072765118898375645469865764L); + TEST_f_f (tan, 0xc.90fcp-4, 0.9999968250656122402859679132395522927393L); + TEST_f_f (tan, 0xc.90fdp-4, 0.9999987324100083358016192309006353329444L); + TEST_f_f (tan, 0xc.90fd8p-4, 0.9999996860835706212861509874451585282616L); + TEST_f_f (tan, 0xc.90fdap-4, 0.9999999245021033010474530133665235922808L); + TEST_f_f (tan, 0xc.ap-4, 1.0073556597407272165371804539701396631519L); + TEST_f_f (tan, 0xc.98p-4, 1.0034282930863044654045449407466962736255L); + TEST_f_f (tan, 0xc.94p-4, 1.0014703786820082237342656561856877993328L); + TEST_f_f (tan, 0xc.92p-4, 1.0004928571392300571266638743539017593717L); + TEST_f_f (tan, 0xc.91p-4, 1.0000044544650244953647966900221905361131L); + TEST_f_f (tan, 0xc.90fep-4, 1.0000006397580424009014454926842136804016L); + TEST_f_f (tan, 0xc.90fdcp-4, 1.0000001629206928242190327320047489394217L); + TEST_f_f (tan, 0xc.90fdbp-4, 1.0000000437113909572052640953950483705005L); + + TEST_f_f (tan, -0xc.9p-4, -0.9995162902115457818029468900654150261381L); + TEST_f_f (tan, -0xc.908p-4, -0.9997603425502441410973077452249560802034L); + TEST_f_f (tan, -0xc.90cp-4, -0.9998823910588060302788513970802357770031L); + TEST_f_f (tan, -0xc.90ep-4, -0.9999434208994808753305784795924711152508L); + TEST_f_f (tan, -0xc.90fp-4, -0.9999739372166156702433266059635165160515L); + TEST_f_f (tan, -0xc.90f8p-4, -0.9999891957244072765118898375645469865764L); + TEST_f_f (tan, -0xc.90fcp-4, -0.9999968250656122402859679132395522927393L); + TEST_f_f (tan, -0xc.90fdp-4, -0.9999987324100083358016192309006353329444L); + TEST_f_f (tan, -0xc.90fd8p-4, -0.9999996860835706212861509874451585282616L); + TEST_f_f (tan, -0xc.90fdap-4, -0.9999999245021033010474530133665235922808L); + TEST_f_f (tan, -0xc.ap-4, -1.0073556597407272165371804539701396631519L); + TEST_f_f (tan, -0xc.98p-4, -1.0034282930863044654045449407466962736255L); + TEST_f_f (tan, -0xc.94p-4, -1.0014703786820082237342656561856877993328L); + TEST_f_f (tan, -0xc.92p-4, -1.0004928571392300571266638743539017593717L); + TEST_f_f (tan, -0xc.91p-4, -1.0000044544650244953647966900221905361131L); + TEST_f_f (tan, -0xc.90fep-4, -1.0000006397580424009014454926842136804016L); + TEST_f_f (tan, -0xc.90fdcp-4, -1.0000001629206928242190327320047489394217L); + TEST_f_f (tan, -0xc.90fdbp-4, -1.0000000437113909572052640953950483705005L); + #ifndef TEST_FLOAT TEST_f_f (tan, 1e22, -1.628778225606898878549375936939548513545L); TEST_f_f (tan, 0x1p1023, -0.6814476476066215012854144040167365190368L); diff --git a/sysdeps/i386/fpu/libm-test-ulps b/sysdeps/i386/fpu/libm-test-ulps index ab02bde5ff..9ea5ed6fbb 100644 --- a/sysdeps/i386/fpu/libm-test-ulps +++ b/sysdeps/i386/fpu/libm-test-ulps @@ -2353,9 +2353,45 @@ double: 1 idouble: 1 # tan +Test "tan (-0xc.90fdbp-4) == -1.0000000437113909572052640953950483705005": +float: 1 +ifloat: 1 +Test "tan (-0xc.90fdcp-4) == -1.0000001629206928242190327320047489394217": +float: 1 +ifloat: 1 +Test "tan (-0xc.90fep-4) == -1.0000006397580424009014454926842136804016": +float: 1 +ifloat: 1 +Test "tan (-0xc.91p-4) == -1.0000044544650244953647966900221905361131": +float: 1 +ifloat: 1 +Test "tan (-0xc.92p-4) == -1.0004928571392300571266638743539017593717": +float: 1 +ifloat: 1 +Test "tan (-0xc.94p-4) == -1.0014703786820082237342656561856877993328": +float: 1 +ifloat: 1 Test "tan (0x1p16383) == 0.422722393732022337800504160054440141575": ildouble: 1 ldouble: 1 +Test "tan (0xc.90fdbp-4) == 1.0000000437113909572052640953950483705005": +float: 1 +ifloat: 1 +Test "tan (0xc.90fdcp-4) == 1.0000001629206928242190327320047489394217": +float: 1 +ifloat: 1 +Test "tan (0xc.90fep-4) == 1.0000006397580424009014454926842136804016": +float: 1 +ifloat: 1 +Test "tan (0xc.91p-4) == 1.0000044544650244953647966900221905361131": +float: 1 +ifloat: 1 +Test "tan (0xc.92p-4) == 1.0004928571392300571266638743539017593717": +float: 1 +ifloat: 1 +Test "tan (0xc.94p-4) == 1.0014703786820082237342656561856877993328": +float: 1 +ifloat: 1 Test "tan (1e22) == -1.628778225606898878549375936939548513545": ildouble: 1 ldouble: 1 diff --git a/sysdeps/ieee754/flt-32/k_tanf.c b/sysdeps/ieee754/flt-32/k_tanf.c index 92206069c8..be9a5d0f09 100644 --- a/sysdeps/ieee754/flt-32/k_tanf.c +++ b/sysdeps/ieee754/flt-32/k_tanf.c @@ -56,6 +56,8 @@ float __kernel_tanf(float x, float y, int iy) z = pio4-x; w = pio4lo-y; x = z+w; y = 0.0; + if (fabsf (x) < 0x1p-13f) + return (1 - ((hx >> 30) & 2)) * iy * (1.0f - 2 * iy * x); } z = x*x; w = z*z; |