Add comments explaining changes to upstream source files.

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

diff --git a/libc-top-half/musl/src/math/fmal.c b/libc-top-half/musl/src/math/fmal.c
index f167778bc4e2fc45a76ff579decbc752f162426d..dd0e26332243f72737d7ba0f5c5dab176ffee9fa 100644 (file)
--- a/libc-top-half/musl/src/math/fmal.c
+++ b/libc-top-half/musl/src/math/fmal.c
@@ -256,7 +256,7 @@ long double fmal(long double x, long double y, long double z)
                 * the correct sign.
                 */
                fesetround(oround);
-#ifdef __wasilibc_unmodified_upstream
+#ifdef __wasilibc_unmodified_upstream // WASI doesn't need old GCC workarounds
                volatile long double vzs = zs; /* XXX gcc CSE bug workaround */
 #else
                long double vzs = zs;