From: Jim Wilson <wilson@gcc.gnu.org>
Date: Sun, 27 Feb 1994 22:46:49 +0000 (-0800)
Subject: (store_fixed_bit_field): Adjust BITPOS so that it
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3bd98790b02cccc5276f6def254c5dfa3e9dba36;p=gcc.git

(store_fixed_bit_field): Adjust BITPOS so that it
fits inside MODE before adjusting OFFSET to get an aligned address.

From-SVN: r6658
---

diff --git a/gcc/expmed.c b/gcc/expmed.c
index b6269c654dd..5a06dbf5dc2 100644
--- a/gcc/expmed.c
+++ b/gcc/expmed.c
@@ -569,6 +569,16 @@ store_fixed_bit_field (op0, offset, bitsize, bitpos, value, struct_align)
 
       total_bits = GET_MODE_BITSIZE (mode);
 
+      /* Make sure bitpos is valid for the chosen mode.  Adjust BITPOS to
+	 be be in the range 0 to total_bits-1, and put any excess bytes in
+	 OFFSET.  */
+      if (bitpos >= total_bits)
+	{
+	  offset += (bitpos / total_bits) * (total_bits / BITS_PER_UNIT);
+	  bitpos -= ((bitpos / total_bits) * (total_bits / BITS_PER_UNIT)
+		     * BITS_PER_UNIT);
+	}
+
       /* Get ref to an aligned byte, halfword, or word containing the field.
 	 Adjust BITPOS to be position within a word,
 	 and OFFSET to be the offset of that word.