libm: remove int_WRAPPER_C99 macro, add test which checks that I did not break it

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

3 files changed, 139 insertions, 28 deletions

diff --git a/libm/ldouble_wrappers.c b/libm/ldouble_wrappers.c
index 80c9ed8b6..e2d4d8036 100644
--- a/libm/ldouble_wrappers.c
+++ b/libm/ldouble_wrappers.c
@@ -122,17 +122,6 @@ long long func##l(long double x) \
 }
 #endif /* __i386__ && __OPTIMIZE__ */
 
-#if defined __NO_LONG_DOUBLE_MATH
-# define int_WRAPPER_C99(func) /* not needed */
-# else
-# define int_WRAPPER_C99(func) \
-int func##l(long double x) \
-{ \
-    return func((double) x); \
-} \
-libm_hidden_def(func##l)
-#endif
-
 /* Implement the following, as defined by SuSv3 */
 #if 0
 long double acoshl(long double);
@@ -508,26 +497,31 @@ long double significandl(long double x)
 }
 #endif
 
-#ifdef __DO_C99_MATH__
+#if defined __DO_C99_MATH__ && !defined __NO_LONG_DOUBLE_MATH
 
-#ifdef L___fpclassifyl
-int_WRAPPER_C99(__fpclassify)
-#endif
+# ifdef L___fpclassifyl
+int_WRAPPER1(__fpclassify)
+libm_hidden_def(__fpclassifyl)
+# endif
 
-#ifdef L___finitel
-int_WRAPPER_C99(__finite)
-#endif
+# ifdef L___finitel
+int_WRAPPER1(__finite)
+libm_hidden_def(__finitel)
+# endif
 
-#ifdef L___signbitl
-int_WRAPPER_C99(__signbit)
-#endif
+# ifdef L___signbitl
+int_WRAPPER1(__signbit)
+libm_hidden_def(__signbitl)
+# endif
 
-#ifdef L___isnanl
-int_WRAPPER_C99(__isnan)
-#endif
+# ifdef L___isnanl
+int_WRAPPER1(__isnan)
+libm_hidden_def(__isnanl)
+# endif
 
-#ifdef L___isinfl
-int_WRAPPER_C99(__isinf)
-#endif
+# ifdef L___isinfl
+int_WRAPPER1(__isinf)
+libm_hidden_def(__isinfl)
+# endif
 
 #endif
diff --git a/test/math/Makefile.in b/test/math/Makefile.in
index 0acbe9cac..3f9edf833 100644
--- a/test/math/Makefile.in
+++ b/test/math/Makefile.in
@@ -4,7 +4,7 @@
 TESTS := basic-test tst-definitions test-fpucw test-float test-ifloat test-double test-idouble \
     rint signgam ilogb
 ifeq ($(UCLIBC_HAS_LONG_DOUBLE_MATH),y)
-TESTS += test-ldouble test-ildoubl compile_test
+TESTS += test-ldouble test-ildoubl compile_test c99_test
 else
 CFLAGS_basic-test := -DNO_LONG_DOUBLE
 endif
diff --git a/test/math/c99_test.c b/test/math/c99_test.c
new file mode 100644
index 000000000..fd6feeafc
--- /dev/null
+++ b/test/math/c99_test.c
@@ -0,0 +1,117 @@
+//#define _GNU_SOURCE 1
+#include <math.h>
+#include <float.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <limits.h>
+#include <stdio.h>
+
+#define check_d1(func, param, expected) \
+do { \
+	int err; hex_union ur; hex_union up; \
+	double result = func(param); up.f = param; ur.f = result; \
+	errors += (err = (result != (expected))); \
+	err \
+	? printf("FAIL: %s(%g/"HEXFMT")=%g/"HEXFMT" (expected %g)\n", \
+		#func, (double)(param), (long long)up.hex, result, (long long)ur.hex, (double)(expected)) \
+	: printf("PASS: %s(%g)=%g\n", #func, (double)(param), result); \
+} while (0)
+
+#define check_i1(func, param, expected) \
+do { \
+	int err; hex_union up; \
+	long long result = func(param); up.f = param; \
+	errors += (err = (result != (expected))); \
+	err \
+	? printf("FAIL: %s(%g/"HEXFMT")=%lld/%llu (expected %llu)\n", \
+		#func, (double)(param), (long long)up.hex, result, result, (long long)(expected)) \
+	: printf("PASS: %s(%g)=%lld/%llu\n", #func, (double)(param), result, result); \
+} while (0)
+
+#define HEXFMT "%08llx"
+typedef union {
+	double f;
+	uint64_t hex;
+} hex_union;
+
+double zero = 0.0;
+double minus_zero = 0.0;
+double nan_value = 0.0;
+int errors = 0;
+
+int main(void)
+{
+	nan_value /= nan_value;
+	minus_zero = copysign(zero, -1.0);
+
+	check_i1(isfinite, 1.0, 1);
+	check_i1(isfinite, 2.0, 1);
+	check_i1(isfinite, 3.0, 1);
+	check_i1(isfinite, DBL_MAX, 1);
+	check_i1(isfinite, FLT_MAX, 1);
+	check_i1(isfinite, HUGE_VAL, 0);
+	check_i1(isfinite, HUGE_VALF, 0);
+	check_i1(isfinite, HUGE_VALL, 0);
+	check_i1(isfinite, nan_value, 0);
+	check_i1(isfinite, nan_value, 0);
+	check_i1(isfinite, nan_value, 0);
+
+	check_i1(isnan, 1.0, 0);
+	check_i1(isnan, 2.0, 0);
+	check_i1(isnan, 3.0, 0);
+	check_i1(isnan, DBL_MAX, 0);
+	check_i1(isnan, FLT_MAX, 0);
+	check_i1(isnan, HUGE_VAL, 0);
+	check_i1(isnan, HUGE_VALF, 0);
+	check_i1(isnan, HUGE_VALL, 0);
+	check_i1(isnan, (float)HUGE_VALL, 0);
+	check_i1(isnan, nan_value, 1);
+	check_i1(isnan, nan_value, 1);
+	check_i1(isnan, nan_value, 1);
+
+	check_i1(isinf, 1.0, 0);
+	check_i1(isinf, 2.0, 0);
+	check_i1(isinf, 3.0, 0);
+	check_i1(isinf, DBL_MAX, 0);
+	check_i1(isinf, FLT_MAX, 0);
+	check_i1(isinf, (float)DBL_MAX, 1);
+	check_i1(isinf, HUGE_VAL, 1);
+	check_i1(isinf, HUGE_VALF, 1);
+	check_i1(isinf, HUGE_VALL, 1);
+	check_i1(isinf, (float)HUGE_VALL, 1);
+	check_i1(isinf, nan_value, 0);
+	check_i1(isinf, nan_value, 0);
+	check_i1(isinf, nan_value, 0);
+
+	check_i1(fpclassify, minus_zero, FP_ZERO);
+	check_i1(fpclassify, 0.0, FP_ZERO);
+	check_i1(fpclassify, 1.0, FP_NORMAL);
+	check_i1(fpclassify, 2.0, FP_NORMAL);
+	check_i1(fpclassify, 3.0, FP_NORMAL);
+	check_i1(fpclassify, DBL_MIN/1.01, FP_SUBNORMAL);
+	check_i1(fpclassify, DBL_MIN, FP_NORMAL);
+	check_i1(fpclassify, DBL_MAX, FP_NORMAL);
+	check_i1(fpclassify, FLT_MAX, FP_NORMAL);
+	check_i1(fpclassify, DBL_MAX, FP_NORMAL);
+	check_i1(fpclassify, DBL_MAX*1.01, FP_INFINITE);
+	check_i1(fpclassify, HUGE_VAL, FP_INFINITE);
+	check_i1(fpclassify, HUGE_VALF, FP_INFINITE);
+	check_i1(fpclassify, HUGE_VALL, FP_INFINITE);
+	check_i1(fpclassify, (float)HUGE_VALL, FP_INFINITE);
+	check_i1(fpclassify, nan_value, FP_NAN);
+	check_i1(fpclassify, nan_value, FP_NAN);
+	check_i1(fpclassify, nan_value, FP_NAN);
+
+	check_i1(!!signbit, -1.0, 1);
+	check_i1(!!signbit, minus_zero, 1);
+	check_i1(!!signbit, 0.0, 0);
+	check_i1(!!signbit, HUGE_VAL, 0);
+	check_i1(!!signbit, HUGE_VALF, 0);
+	check_i1(!!signbit, HUGE_VALL, 0);
+	check_i1(!!signbit, -HUGE_VAL, 1);
+	check_i1(!!signbit, -HUGE_VALF, 1);
+	check_i1(!!signbit, -HUGE_VALL, 1);
+
+	printf("Errors: %d\n", errors);
+	return errors;
+}