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>

1 files changed, 117 insertions, 0 deletions

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;
+}