add FORCE_EVAL macro to evaluate float expr for their side effect
updated nextafter* to use FORCE_EVAL, it can be used in many other
places in the math code to improve readability.
diff --git a/src/math/nexttoward.c b/src/math/nexttoward.c
index 43f8fee..7355f2f 100644
--- a/src/math/nexttoward.c
+++ b/src/math/nexttoward.c
@@ -38,10 +38,8 @@
if (e == 0x7ff)
return x + x;
/* raise underflow if ux.value is subnormal or zero */
- if (e == 0) {
- volatile float z;
- z = x*x + ux.value*ux.value;
- }
+ if (e == 0)
+ FORCE_EVAL(x*x + ux.value*ux.value);
return ux.value;
}
#endif
