git
/
gcc
mirror of git://gcc.gnu.org/git/gcc.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

expmed.c (extract_bit_field_1): In the larger-than-a-word case... 

* expmed.c (extract_bit_field_1): In the larger-than-a-word case, factor
	out the processing order as in store_bit_field_1.

From-SVN: r199637
This commit is contained in:
Eric Botcazou 2013-06-04 07:41:18 +00:00
parent 94b74637e0
commit 0cd9e9eeea
2 changed files with 13 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2013-06-04 Eric Botcazou <ebotcazou@adacore.com>
* expmed.c (extract_bit_field_1): In the larger-than-a-word case, factor
out the processing order as in store_bit_field_1.
2013-06-04 Jan Hubicka <jh@suse.cz>
PR middle-end/57500
@ -33,7 +38,7 @@
2013-06-03 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/57268
* sched-deps.c (sched_analyze_2): Don't flush_pedning_lists
* sched-deps.c (sched_analyze_2): Don't flush_pending_lists
if DEBUG_INSN_P (insn).
Reapply

12
gcc/expmed.c
View File

@ -1486,6 +1486,7 @@ extract_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize,
This is because the most significant word is the one which may
be less than full. */
unsigned int backwards = WORDS_BIG_ENDIAN;
unsigned int nwords = (bitsize + (BITS_PER_WORD - 1)) / BITS_PER_WORD;
unsigned int i;
rtx last;
@ -1503,13 +1504,14 @@ extract_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize,
if I is 1, use the next to lowest word; and so on. */
/* Word number in TARGET to use. */
unsigned int wordnum
= (WORDS_BIG_ENDIAN
= (backwards
? GET_MODE_SIZE (GET_MODE (target)) / UNITS_PER_WORD - i - 1
: i);
/* Offset from start of field in OP0. */
unsigned int bit_offset = (WORDS_BIG_ENDIAN
? MAX (0, ((int) bitsize - ((int) i + 1)
* (int) BITS_PER_WORD))
unsigned int bit_offset = (backwards
? MAX ((int) bitsize - ((int) i + 1)
* BITS_PER_WORD,
0)
: (int) i * BITS_PER_WORD);
rtx target_part = operand_subword (target, wordnum, 1, VOIDmode);
rtx result_part
@ -1541,7 +1543,7 @@ extract_bit_field_1 (rtx str_rtx, unsigned HOST_WIDE_INT bitsize,
for (i = nwords; i < total_words; i++)
emit_move_insn
(operand_subword (target,
WORDS_BIG_ENDIAN ? total_words - i - 1 : i,
backwards ? total_words - i - 1 : i,
1, VOIDmode),
const0_rtx);
}