apeloye

1 files changed, 6 insertions, 4 deletions

diff --git a/src/fz_mul.c b/src/fz_mul.c
index 74d6906..9c53308 100644
--- a/src/fz_mul.c
+++ b/src/fz_mul.c
@@ -14,12 +14,14 @@ void fz_mul_egypt(word_t *a,word_t *b,word_t *o_lo,word_t *o_hi,size_t len){
   fz_copy(a,xs,len);
   fz_clear(xs+len,len);
   for(size_t y = 0;y < len;y++){
-    word_t w    = b[y];
-    size_t cut  = len+y+1;
+    word_t  w   = b[y];
+    size_t  cut = len+1;
+    word_t *xyc = xy+y;
+    word_t *xsc = xs+y;
     for(size_t x = 0;x < WORD_BITNESS;x++){
-      fz_add_gated(xy,xs,xy,cut,w_odd(w));
+      fz_add_gated(xyc,xsc,xyc,cut,w_odd(w));
       w >>= 1;
-      fz_shl(xs,xs,cut,1);
+      fz_shl(xsc,xsc,cut,1);
     }
   }
   fz_copy(xy,    o_lo,len);