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-rw-r--r--src/math/exp2f.c2
-rw-r--r--src/math/expf.c2
2 files changed, 4 insertions, 0 deletions
diff --git a/src/math/exp2f.c b/src/math/exp2f.c
index cf6126ee..296b6343 100644
--- a/src/math/exp2f.c
+++ b/src/math/exp2f.c
@@ -91,6 +91,8 @@ float exp2f(float x)
 	/* Filter out exceptional cases. */
 	ix = u.i & 0x7fffffff;
 	if (ix > 0x42fc0000) {  /* |x| > 126 */
+		if (ix > 0x7f800000) /* NaN */
+			return x;
 		if (u.i >= 0x43000000 && u.i < 0x80000000) {  /* x >= 128 */
 			x *= 0x1p127f;
 			return x;
diff --git a/src/math/expf.c b/src/math/expf.c
index 16e9afe6..feee2b0e 100644
--- a/src/math/expf.c
+++ b/src/math/expf.c
@@ -39,6 +39,8 @@ float expf(float x)
 
 	/* special cases */
 	if (hx >= 0x42aeac50) {  /* if |x| >= -87.33655f or NaN */
+		if (hx > 0x7f800000) /* NaN */
+			return x;
 		if (hx >= 0x42b17218 && !sign) {  /* x >= 88.722839f */
 			/* overflow */
 			x *= 0x1p127f;