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.

1 files changed, 2 insertions, 4 deletions

diff --git a/src/math/nextafterf.c b/src/math/nextafterf.c
index 47775b92..b703487b 100644
--- a/src/math/nextafterf.c
+++ b/src/math/nextafterf.c
@@ -28,9 +28,7 @@ float nextafterf(float x, float y)
 	if (e == 0x7f800000)
 		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;
 }