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2001-06-19 Andreas Jaeger <aj@suse.de> * sysdeps/ieee754/ldbl-128/s_tanhl.c: New file. * math/libm-test.inc (tanh_test): Test for 2^-56. * sysdeps/ieee754/ldbl-96/s_tanhl.c (__tanhl): Make sure result equals argument when x < 2^-55. Patches by Stephen L. Moshier <moshier@na-net.ornl.gov>.
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ChangeLog
10
ChangeLog
@ -1,3 +1,13 @@
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2001-06-19 Andreas Jaeger <aj@suse.de>
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* sysdeps/ieee754/ldbl-128/s_tanhl.c: New file.
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* math/libm-test.inc (tanh_test): Test for 2^-56.
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* sysdeps/ieee754/ldbl-96/s_tanhl.c (__tanhl): Make sure result
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equals argument when x < 2^-55.
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Patches by Stephen L. Moshier <moshier@na-net.ornl.gov>.
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2001-06-17 Alan Modra <amodra@bigpond.net.au>
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* sysdeps/hppa/dl-machine.h (elf_machine_rela): handle relocs
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4
NEWS
4
NEWS
@ -8,8 +8,8 @@ Please send GNU C library bug reports using the `glibcbug' script to
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Version 2.2.4
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* Stephen Moshier implemented cosh, expm1, log1p, acos, sinh for the
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128-bit long double format.
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* Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh for
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the 128-bit long double format.
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* Bruno Haible updated all the code handling Unicode in some form to
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support Unicode 3.1.
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@ -3975,6 +3975,9 @@ tanh_test (void)
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TEST_f_f (tanh, 1.0L, 0.7615941559557648881194582826047935904L);
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TEST_f_f (tanh, -1.0L, -0.7615941559557648881194582826047935904L);
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/* 2^-56 */
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TEST_f_f (tanh, 1.387778780781445675529539585113525390625e-17L, 1.387778780781445675529539585113525390625e-17L);
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END (tanh);
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}
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@ -78,7 +78,7 @@ static long double one=1.0, two=2.0, tiny = 1.0e-4900L;
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if ((ix|j0|j1) == 0)
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return x; /* x == +- 0 */
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if (ix<0x3fc8) /* |x|<2**-55 */
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return x*(one+x); /* tanh(small) = small */
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return x*(one+tiny); /* tanh(small) = small */
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if (ix>=0x3fff) { /* |x|>=1 */
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t = __expm1l(two*fabsl(x));
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z = one - two/(t+two);
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