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/*
* Copyright 2016 The Emscripten Authors. All rights reserved.
* Emscripten is available under two separate licenses, the MIT license and the
* University of Illinois/NCSA Open Source License. Both these licenses can be
* found in the LICENSE file.
*/
#include <stdio.h>
// headers test, see issue #1013
#include <cfloat>
#include <cmath>
#define TEST(name, x, y) printf(" " #name "(%.2f, %.2f) => %.2f, %.2f\n", x, y, name(x, y), name(y, x));
#define TEST_ABS(name, x, y) printf("abs " #name "(%.2f, %.2f) => %.2f, %.2f\n", x, y, abs(name(x, y)), abs(name(y, x)));
// fmin etc. are not specced to be sensitive to negative zero, and LLVM does
// depend on that for optimizations, so check only the absolute value there
#define TESTS(name) \
TEST(name, 0.33, 0.5) \
TEST(name, NAN, 0.5) \
TEST_ABS(name, 0.0, -0.0)
// when calling via a function pointer, the LLVM optimizer isn't involved, and
// the libc implementation does handle negative zero as you'd expect
#define PTR_TESTS(name, ptr) \
puts("ptr " #name); \
ptr = &name; \
TEST(ptr, 0.33, 0.5) \
TEST(ptr, NAN, 0.5) \
TEST(ptr, 0.0, -0.0)
// make it look like these are externally modifiable so the optimizer doesn't
// trivially remove the function pointer
double (*funcd)(double, double) __attribute__((used));
float (*funcf)(float, float) __attribute__((used));
int main(int argc, char **argv) {
float x = 1.234, y = 3.5, q = 0.00000001;
y *= 3;
int z = x < y;
printf("*%d,%d,%.1f,%d,%.4f,%.2f*\n", z, int(y), y, (int)x, x, q);
TESTS(fmin);
TESTS(fmax);
TESTS(fminf);
TESTS(fmaxf);
PTR_TESTS(fmin, funcd);
PTR_TESTS(fmax, funcd);
PTR_TESTS(fminf, funcf);
PTR_TESTS(fmaxf, funcf);
printf("small: %.10f\n", argc * 0.000001);
double d = 1.12345678901234567890123e21;
printf("double: %f\n", d);
return 0;
}
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