remove LFS64 symbol aliases; replace with dynamic linker remapping

[musl] / src / math / ilogbf.c

diff --git a/src/math/ilogbf.c b/src/math/ilogbf.c
index 42cd62e..e23ba20 100644 (file)
--- a/src/math/ilogbf.c
+++ b/src/math/ilogbf.c
@@ -3,22 +3,24 @@
 
 int ilogbf(float x)
 {
-       union fshape u = {x};
-       int e = u.bits>>23 & 0xff;
+       #pragma STDC FENV_ACCESS ON
+       union {float f; uint32_t i;} u = {x};
+       uint32_t i = u.i;
+       int e = i>>23 & 0xff;
 
        if (!e) {
-               u.bits <<= 9;
-               if (u.bits == 0) {
+               i <<= 9;
+               if (i == 0) {
                        FORCE_EVAL(0/0.0f);
                        return FP_ILOGB0;
                }
                /* subnormal x */
-               for (e = -0x7f; u.bits < (uint32_t)1<<31; e--, u.bits<<=1);
+               for (e = -0x7f; i>>31 == 0; e--, i<<=1);
                return e;
        }
        if (e == 0xff) {
                FORCE_EVAL(0/0.0f);
-               return u.bits<<9 ? FP_ILOGBNAN : INT_MAX;
+               return i<<9 ? FP_ILOGBNAN : INT_MAX;
        }
        return e - 0x7f;
 }