Add comments explaining changes to upstream source files.

[wasi-libc.git] / libc-top-half / musl / src / math / fmaf.c

diff --git a/libc-top-half/musl/src/math/fmaf.c b/libc-top-half/musl/src/math/fmaf.c
index 9f148ea727a8040d3b21814aada823f99cbc7bd3..111c0aec986ee249cdd06e5af98c738657e5549c 100644 (file)
--- a/libc-top-half/musl/src/math/fmaf.c
+++ b/libc-top-half/musl/src/math/fmaf.c
@@ -80,7 +80,7 @@ float fmaf(float x, float y, float z)
 #ifdef FE_TOWARDZERO
        fesetround(FE_TOWARDZERO);
 #endif
-#ifdef __wasilibc_unmodified_upstream
+#ifdef __wasilibc_unmodified_upstream // WASI doesn't need old GCC workarounds
        volatile double vxy = xy;  /* XXX work around gcc CSE bug */
 #else
        double vxy = xy;