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authorJoseph Myers <joseph@codesourcery.com>2018-06-11 16:33:42 +0000
committerJoseph Myers <joseph@codesourcery.com>2018-06-11 16:33:42 +0000
commitca121b117f2c9c97a4c121334481a96c94fef3a0 (patch)
tree1ec68d6d28ff9b154efa4a3cc8b84eceb73d1d06 /math/libm-test-fma.inc
parent2b69fecb9d0681a124662dfba89291ad473aa55f (diff)
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Fix ldbl-96 fma (Inf, Inf, finite) (bug 23272).
As reported in bug 23272, the ldbl-96 implementation of fma (fma for
double, in terms of ldbl-96 as the internal arithmetic type, as used
on 32-bit x86) is missing some of the special-case handling for
non-finite arguments, resulting in incorrect NaN results when the
first two arguments are infinities, the third is finite and so the
infinities go through the logic for finite arguments.  This patch
fixes it by handling all cases of non-finite arguments up front, with
additional fma tests for the problem cases being added to the
testsuite.

Tested for x86_64 and x86.

	[BZ #23272]
	* sysdeps/ieee754/ldbl-96/s_fma.c (__fma): Start by handling all
	cases of non-finite arguments.
	* math/libm-test-fma.inc (fma_test_data): Add more tests.
Diffstat (limited to 'math/libm-test-fma.inc')
-rw-r--r--math/libm-test-fma.inc33
1 files changed, 33 insertions, 0 deletions
diff --git a/math/libm-test-fma.inc b/math/libm-test-fma.inc
index 655267b507..5b29fb8201 100644
--- a/math/libm-test-fma.inc
+++ b/math/libm-test-fma.inc
@@ -113,6 +113,39 @@ static const struct test_fff_f_data fma_test_data[] =
     TEST_fff_f (fma, plus_infty, minus_infty, minus_infty, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
     TEST_fff_f (fma, minus_infty, plus_infty, minus_infty, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
 
+    TEST_fff_f (fma, plus_infty, plus_infty, plus_zero, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, plus_infty, minus_zero, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, plus_infty, min_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, plus_infty, -min_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, plus_infty, min_subnorm_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, plus_infty, -min_subnorm_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, plus_infty, max_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, plus_infty, -max_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, minus_infty, plus_zero, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, minus_infty, minus_zero, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, minus_infty, min_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, minus_infty, -min_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, minus_infty, min_subnorm_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, minus_infty, -min_subnorm_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, minus_infty, max_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, plus_infty, minus_infty, -max_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, plus_infty, plus_zero, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, plus_infty, minus_zero, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, plus_infty, min_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, plus_infty, -min_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, plus_infty, min_subnorm_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, plus_infty, -min_subnorm_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, plus_infty, max_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, plus_infty, -max_value, minus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, minus_infty, plus_zero, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, minus_infty, minus_zero, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, minus_infty, min_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, minus_infty, -min_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, minus_infty, min_subnorm_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, minus_infty, -min_subnorm_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, minus_infty, max_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+    TEST_fff_f (fma, minus_infty, minus_infty, -max_value, plus_infty, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
+
     AUTO_TESTS_fff_f (fma),
   };