diff options
| author | Andreas Krebbel <Andreas.Krebbel@de.ibm.com> | 2012-01-17 20:37:46 +0000 |
|---|---|---|
| committer | Richard Sandiford <rdsandiford@googlemail.com> | 2012-01-17 20:37:46 +0000 |
| commit | ec3eeae72c55bb2ee910ed3715ac719e030501be (patch) | |
| tree | 0817497fe59c2693e5501c674272b3c4672529f3 /gcc/expmed.c | |
| parent | 61594a324ac2d6623ab0c237acd892d7a2bc2495 (diff) | |
gcc/
2012-01-17 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
Richard Sandiford <rdsandiford@googlemail.com>
PR middle-end/50325
PR middle-end/51192
* optabs.h (simplify_expand_binop): Declare.
* optabs.c (simplify_expand_binop): Make global.
* expmed.c (store_bit_field_1): Use simplify_expand_binop on big
endian targets if the source cannot be exactly covered by word
mode chunks.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@183262 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/expmed.c')
| -rw-r--r-- | gcc/expmed.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/gcc/expmed.c b/gcc/expmed.c index bced96e74d4..09a933da5f5 100644 --- a/gcc/expmed.c +++ b/gcc/expmed.c @@ -557,9 +557,21 @@ store_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize, 0) : (int) i * BITS_PER_WORD); rtx value_word = operand_subword_force (value, wordnum, fieldmode); - - if (!store_bit_field_1 (op0, MIN (BITS_PER_WORD, - bitsize - i * BITS_PER_WORD), + unsigned HOST_WIDE_INT new_bitsize = + MIN (BITS_PER_WORD, bitsize - i * BITS_PER_WORD); + + /* If the remaining chunk doesn't have full wordsize we have + to make sure that for big endian machines the higher order + bits are used. */ + if (new_bitsize < BITS_PER_WORD && BYTES_BIG_ENDIAN && !backwards) + value_word = simplify_expand_binop (word_mode, lshr_optab, + value_word, + GEN_INT (BITS_PER_WORD + - new_bitsize), + NULL_RTX, true, + OPTAB_LIB_WIDEN); + + if (!store_bit_field_1 (op0, new_bitsize, bitnum + bit_offset, bitregion_start, bitregion_end, word_mode, |