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Diffstat (limited to 'sysdeps/m68k/fpu/s_ilogb.c')
-rw-r--r--sysdeps/m68k/fpu/s_ilogb.c26
1 files changed, 19 insertions, 7 deletions
diff --git a/sysdeps/m68k/fpu/s_ilogb.c b/sysdeps/m68k/fpu/s_ilogb.c
index a081a884d4..2d8f7d5082 100644
--- a/sysdeps/m68k/fpu/s_ilogb.c
+++ b/sysdeps/m68k/fpu/s_ilogb.c
@@ -19,21 +19,33 @@
#define __LIBC_M81_MATH_INLINES
#include <math.h>
-#ifndef FUNC
-#define FUNC ilogb
+#ifndef SUFF
+#define SUFF
#endif
#ifndef float_type
#define float_type double
#endif
-#define __CONCATX(a,b) __CONCAT(a,b)
+#define CONCATX(a,b) __CONCAT(a,b)
+#define s(name) CONCATX(name,SUFF)
+#define m81(func) __m81_u(s(func))
int
-__CONCATX(__,FUNC) (x)
- float_type x;
+s(__ilogb) (float_type x)
{
- return __m81_u(__CONCATX(__,FUNC))(x);
+ float_type result;
+ unsigned long x_cond;
+
+ x_cond = __m81_test (x);
+ /* We must return consistent values for zero and NaN. */
+ if (x_cond & __M81_COND_ZERO)
+ return FP_ILOGB0;
+ if (x_cond & (__M81_COND_NAN | __M81_COND_INF))
+ return FP_ILOGBNAN;
+
+ __asm ("fgetexp%.x %1, %0" : "=f" (result) : "f" (x));
+ return (int) result;
}
#define weak_aliasx(a,b) weak_alias(a,b)
-weak_aliasx (__CONCATX(__,FUNC), FUNC)
+weak_aliasx (s(__ilogb), s(ilogb))