math: excess precision fix modf, modff, scalbn, scalbnf

[musl] / src / math / scalbnf.c

diff --git a/src/math/scalbnf.c b/src/math/scalbnf.c
index e5c76db..f94b5d5 100644 (file)
--- a/src/math/scalbnf.c
+++ b/src/math/scalbnf.c
@@ -2,8 +2,6 @@
 
 float scalbnf(float x, int n)
 {
-       /* make sure result is stored as double on overflow or underflow */
-       volatile float z;
        float scale;
 
        if (n > 127) {
@@ -13,8 +11,8 @@ float scalbnf(float x, int n)
                        x *= 0x1p127f;
                        n -= 127;
                        if (n > 127) {
-                               z = x * 0x1p127f;
-                               return z;
+                               STRICT_ASSIGN(float, x, x * 0x1p127f);
+                               return x;
                        }
                }
        } else if (n < -126) {
@@ -24,12 +22,12 @@ float scalbnf(float x, int n)
                        x *= 0x1p-126f;
                        n += 126;
                        if (n < -126) {
-                               z = x * 0x1p-126f;
-                               return z;
+                               STRICT_ASSIGN(float, x, x * 0x1p-126f);
+                               return x;
                        }
                }
        }
        SET_FLOAT_WORD(scale, (uint32_t)(0x7f+n)<<23);
-       z = x * scale;
-       return z;
+       STRICT_ASSIGN(float, x, x * scale);
+       return x;
 }