mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-01-13 06:34:26 +08:00
Code Issues Packages Projects Releases Wiki Activity

* expr.c (move_block_from_reg): Try using an integral mov operation first.

Browse Source 
From-SVN: r13897
This commit is contained in:
Doug Evans 1997-04-13 23:29:50 +00:00
parent ad5780142a
commit 58a32c5c03
1 changed files with 13 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
gcc/expr.c
View File

@ -1717,9 +1717,21 @@ move_block_from_reg (regno, x, nregs, size)
{
int i;
rtx pat, last;
enum machine_mode mode;
/* If SIZE is that of a mode no bigger than a word, just use that
mode's store operation. */
if (size <= UNITS_PER_WORD
&& (mode = mode_for_size (size * BITS_PER_UNIT, MODE_INT, 0)) != BLKmode)
{
emit_move_insn (change_address (x, mode, NULL),
gen_rtx (REG, mode, regno));
return;
}
/* Blocks smaller than a word on a BYTES_BIG_ENDIAN machine must be aligned
to the left before storing to memory. */
to the left before storing to memory. Note that the previous test
doesn't handle all cases (e.g. SIZE == 3). */
if (size < UNITS_PER_WORD && BYTES_BIG_ENDIAN)
{
rtx tem = operand_subword (x, 0, 1, BLKmode);