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Add more tests of pow.

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Prompted by a gcc-patches discussion, this patch adds tests of pow for
the cases where pow (x, 0.5) is required to return a different result
from sqrt (x), as those cases were previously missing from the tests
(although they worked correctly).

Tested for x86_64 and x86.

	* math/auto-libm-test-in: Add another test of pow.
	* math/auto-libm-test-out: Regenerated.
	* math/libm-test.inc (pow_test_data): Add another test.
This commit is contained in:
Joseph Myers 2015-11-10 17:34:13 +00:00
parent 71bbdde7f5
commit 685312298f
4 changed files with 33 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2015-11-10 Joseph Myers <joseph@codesourcery.com>
* math/auto-libm-test-in: Add another test of pow.
* math/auto-libm-test-out: Regenerated.
* math/libm-test.inc (pow_test_data): Add another test.
2015-11-10 Adhemerval Zanella <adhemerval.zanella@linaro.org>
[BZ #19219]

1
math/auto-libm-test-in
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@ -3254,6 +3254,7 @@ pow 0.0 max
pow 0.0 min_subnorm
# pow (-0, y) == +0 for y > 0 and not an odd integer.
pow -0 0.5
pow -0 4
pow -0 0x1p24
pow -0 0x1p127

25
math/auto-libm-test-out
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@ -219802,6 +219802,31 @@ pow 0.0 min_subnorm
= pow tonearest ldbl-128 0x0p+0L 0x4p-16496L : 0x0p+0L : inexact-ok
= pow towardzero ldbl-128 0x0p+0L 0x4p-16496L : 0x0p+0L : inexact-ok
= pow upward ldbl-128 0x0p+0L 0x4p-16496L : 0x0p+0L : inexact-ok
pow -0 0.5
= pow downward flt-32 -0x0p+0f 0x8p-4f : 0x0p+0f : inexact-ok
= pow tonearest flt-32 -0x0p+0f 0x8p-4f : 0x0p+0f : inexact-ok
= pow towardzero flt-32 -0x0p+0f 0x8p-4f : 0x0p+0f : inexact-ok
= pow upward flt-32 -0x0p+0f 0x8p-4f : 0x0p+0f : inexact-ok
= pow downward dbl-64 -0x0p+0 0x8p-4 : 0x0p+0 : inexact-ok
= pow tonearest dbl-64 -0x0p+0 0x8p-4 : 0x0p+0 : inexact-ok
= pow towardzero dbl-64 -0x0p+0 0x8p-4 : 0x0p+0 : inexact-ok
= pow upward dbl-64 -0x0p+0 0x8p-4 : 0x0p+0 : inexact-ok
= pow downward ldbl-96-intel -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow tonearest ldbl-96-intel -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow towardzero ldbl-96-intel -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow upward ldbl-96-intel -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow downward ldbl-96-m68k -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow tonearest ldbl-96-m68k -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow towardzero ldbl-96-m68k -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow upward ldbl-96-m68k -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow downward ldbl-128 -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow tonearest ldbl-128 -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow towardzero ldbl-128 -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow upward ldbl-128 -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow downward ldbl-128ibm -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow tonearest ldbl-128ibm -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow towardzero ldbl-128ibm -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
= pow upward ldbl-128ibm -0x0p+0L 0x8p-4L : 0x0p+0L : inexact-ok
pow -0 4
= pow downward flt-32 -0x0p+0f 0x4p+0f : 0x0p+0f : inexact-ok
= pow tonearest flt-32 -0x0p+0f 0x4p+0f : 0x0p+0f : inexact-ok

1
math/libm-test.inc
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@ -10285,6 +10285,7 @@ static const struct test_ff_f_data pow_test_data[] =
#endif
/* pow (-inf, y) == +inf for y > 0 and not an odd integer. */
TEST_ff_f (pow, minus_infty, 0.5, plus_infty, ERRNO_UNCHANGED),
TEST_ff_f (pow, minus_infty, 28, plus_infty, ERRNO_UNCHANGED),
TEST_ff_f (pow, minus_infty, 0x1p24, plus_infty, ERRNO_UNCHANGED),
TEST_ff_f (pow, minus_infty, 0x1p127, plus_infty, ERRNO_UNCHANGED),