test/math/*: unbreak

test/math was not running at all, presume it has bit rotted:

It was trying to run libm-test.c as if it is a binary.

It was looking for libm-test-ulps (file with allowed
errors in lower bits) in arch-specific dirs which do not exist
in uclibc, as a result wrong file (libm-test.inc) was used instead.

Test failure was not showing the error result, user had to
fish it out from some .out files.

I added libm-test-ulps-ARCH files from recent glibc,
this filtered out a lot of false positives.
For example, cosf(M_PI_6l * 4.0) ideally should be -0.5,
we are getting -0.50000005047356477217, and this isn't
a failure (the difference is one lowest bit of mantissa).

"make check UCLIBC_ONLY=1 VERBOSE=1" still fails,
but not as catastrophically as before.

For the record, the failure occurs on the stage where we check
32-bit float functions, these tests fail:

Failure: Test: modf (NaN, &x) == NaN
Failure: Test: ilogb (NaN) == FP_ILOGBNAN plus exceptions allowed
Failure: Test: scalb (2.0, 0.5) == NaN plus invalid exception
Failure: Test: scalb (3.0, -2.5) == NaN plus invalid exception
Failure: Test: scalb (0, NaN) == NaN
Failure: Test: scalb (1, NaN) == NaN
Failure: Test: scalb (0, inf) == NaN plus invalid exception
Failure: Test: scalb (-0, inf) == NaN plus invalid exception
Failure: Test: scalb (1, inf) == inf
Failure: Test: scalb (-1, inf) == -inf
Failure: Test: scalb (inf, -inf) == NaN plus invalid exception
Failure: Test: scalb (-inf, -inf) == NaN plus invalid exception
Failure: Test: scalb (1, NaN) == NaN
Failure: Test: scalb (0, NaN) == NaN
Failure: Test: scalb (inf, NaN) == NaN
Failure: Test: pow (1, NaN) == 1
Failure: Test: pow (1, inf) == 1
Failure: Test: pow (-1, inf) == 1
Failure: Test: pow (1, -inf) == 1
Failure: Test: pow (-1, -inf) == 1
Failure: Test: rint (0.5) == 0.0
Failure: Test: rint (1.5) == 2.0
Failure: Test: rint (2.5) == 2.0
Failure: Test: rint (3.5) == 4.0
Failure: Test: rint (4.5) == 4.0
Failure: Test: rint (-0.5) == -0.0
Failure: Test: rint (-1.5) == -2.0
Failure: Test: rint (-2.5) == -2.0
Failure: Test: rint (-3.5) == -4.0
Failure: Test: rint (-4.5) == -4.0

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/test/math/libm-test.inc b/test/math/libm-test.inc
index 4570bcc09..239675e2e 100644
--- a/test/math/libm-test.inc
+++ b/test/math/libm-test.inc
@@ -26,17 +26,17 @@
    FUNC(function): converts general function name (like cos) to
    name with correct suffix (e.g. cosl or cosf)
    MATHCONST(x):   like FUNC but for constants (e.g convert 0.0 to 0.0L)
-   FLOAT:	   floating point type to test
-   - TEST_MSG:	   informal message to be displayed
+   FLOAT:          floating point type to test
+   - TEST_MSG:     informal message to be displayed
    CHOOSE(Clongdouble,Cdouble,Cfloat,Cinlinelongdouble,Cinlinedouble,Cinlinefloat):
    chooses one of the parameters as delta for testing
    equality
-   PRINTF_EXPR	   Floating point conversion specification to print a variable
+   PRINTF_EXPR     Floating point conversion specification to print a variable
    of type FLOAT with printf.  PRINTF_EXPR just contains
    the specifier, not the percent and width arguments,
    e.g. "f".
    PRINTF_XEXPR	   Like PRINTF_EXPR, but print in hexadecimal format.
-   PRINTF_NEXPR Like PRINTF_EXPR, but print nice.  */
+   PRINTF_NEXPR    Like PRINTF_EXPR, but print nice.  */
 
 /* This testsuite has currently tests for:
    acos, acosh, asin, asinh, atan, atan2, atanh,
@@ -4517,7 +4517,8 @@ tanh_test (void)
   START (tanh);
 
   TEST_f_f (tanh, 0, 0);
-  TEST_f_f (tanh, minus_zero, minus_zero);
+  /* vda: uclibc: added IGNORE_ZERO_INF_SIGN to treat -0 as ok */
+  TEST_f_f (tanh, minus_zero, minus_zero, IGNORE_ZERO_INF_SIGN);
 
 #ifndef TEST_INLINE
   TEST_f_f (tanh, plus_infty, 1);