scc

simple c99 compiler
git clone git://git.simple-cc.org/scc
Log | Files | Refs | Submodules | README | LICENSE
commit 64c6767a017f7c7dd1b34fd7f6fe2a7e3060a35f
parent 6e5e998efb6bbb9f65cff011c2f99162bd883ff1
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Mon,  1 Oct 2018 09:16:54 +0100

[cc1] Improve ones()

This function is inspired in the function getbits() of k&r.

Diffstat:

Mcc1/fold.c | 6+-----


1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/cc1/fold.c b/cc1/fold.c
@@ -9,11 +9,7 @@ static char sccsid[] = "@(#) ./cc1/fold.c";
 TUINT
 ones(int nbytes)
 {
-	TUINT v;
-
-	for (v = 0; nbytes--; v |= 255)
-		v <<= 8;
-	return v;
+	return (nbytes == 8) ? -1 : ~(-1ull << nbytes * 8);
 }
 
 static int