elf.h: add ELFCOMPRESS_ZSTD

[musl] / src / math / roundf.c

diff --git a/src/math/roundf.c b/src/math/roundf.c
index c6b2779..e8210af 100644 (file)
--- a/src/math/roundf.c
+++ b/src/math/roundf.c
@@ -1,5 +1,14 @@
 #include "libm.h"
 
+#if FLT_EVAL_METHOD==0
+#define EPS FLT_EPSILON
+#elif FLT_EVAL_METHOD==1
+#define EPS DBL_EPSILON
+#elif FLT_EVAL_METHOD==2
+#define EPS LDBL_EPSILON
+#endif
+static const float_t toint = 1/EPS;
+
 float roundf(float x)
 {
        union {float f; uint32_t i;} u = {x};
@@ -11,10 +20,10 @@ float roundf(float x)
        if (u.i >> 31)
                x = -x;
        if (e < 0x7f-1) {
-               FORCE_EVAL(x + 0x1p23f);
+               FORCE_EVAL(x + toint);
                return 0*u.f;
        }
-       y = (float)(x + 0x1p23f) - 0x1p23f - x;
+       y = x + toint - toint - x;
        if (y > 0.5f)
                y = y + x - 1;
        else if (y <= -0.5f)