(expand_shift): Truncate immediate count if SHIFT_COUNT_TRUNCATED.

From-SVN: r6538

(expand_shift): Truncate immediate count if SHIFT_COUNT_TRUNCATED.
From-SVN: r6538
2ab0a5c4 · Torbjorn Granlund · 5b6e175e · 2ab0a5c4
Commit 2ab0a5c4 authored Feb 12, 1994 by Torbjorn Granlund
Hide whitespace changes
Inline Side-by-side

Showing with 8 additions and 0 deletions

gcc/expmed.c
+8 -0

No files found.
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -1602,6 +1602,14 @@ expand_shift (code, mode, shifted, amount, target, unsignedp)

  op1 = expand_expr (amount, NULL_RTX, VOIDmode, 0);

+#if SHIFT_COUNT_TRUNCATED
+  if (SHIFT_COUNT_TRUNCATED
+      && GET_CODE (op1) == CONST_INT
+      && (unsigned HOST_WIDE_INT) INTVAL (op1) >= GET_MODE_BITSIZE (mode))
+    op1 = GEN_INT ((unsigned HOST_WIDE_INT) INTVAL (op1)
+		   % GET_MODE_BITSIZE (mode));
+#endif
+
  if (op1 == const0_rtx)
    return shifted;