From 401db79156cdaef435b566f7c54abac74d53108b Mon Sep 17 00:00:00 2001 From: Jim Wilson Date: Sun, 25 Apr 1993 14:07:22 -0700 Subject: [PATCH] (extract_fixed_bit_field): Adjust BITPOS so that it fits inside MODE before adjusting OFFSET to get an aligned address. From-SVN: r4216 --- gcc/expmed.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/gcc/expmed.c b/gcc/expmed.c index 90ab40faa98..6e7efadb8fa 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -1257,6 +1257,16 @@ extract_fixed_bit_field (tmode, op0, offset, bitsize, bitpos, 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. -- 2.30.2