OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

sparc.h (BRANCH_COST): Define. 

2002-04-18  David S. Miller  <davem@redhat.com>

	* config/sparc/sparc.h (BRANCH_COST): Define.

	* fold-const.c (BRANCH_COST): Don't provide default here, expr.h
	does it.

From-SVN: r52500
This commit is contained in:
David S. Miller 2002-04-18 16:37:15 -07:00 committed by David S. Miller
parent 566576e718
commit 2f82dbf865
3 changed files with 24 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2002-04-18 David S. Miller <davem@redhat.com>
* config/sparc/sparc.h (BRANCH_COST): Define.
* fold-const.c (BRANCH_COST): Don't provide default here, expr.h
does it.
2002-04-18 Hans-Peter Nilsson <hp@bitrange.com>
* flow.c (update_life_info): Ignore return value of cleanup_cfg.

17
gcc/config/sparc/sparc.h
View File

@ -2607,6 +2607,23 @@ do { \
|| (CLASS1) == FPCC_REGS || (CLASS2) == FPCC_REGS) \
? (sparc_cpu == PROCESSOR_ULTRASPARC ? 12 : 6) : 2)
/* Provide the cost of a branch. For pre-v9 processors we use
a value of 3 to take into account the potential annulling of
the delay slot (which ends up being a bubble in the pipeline slot)
plus a cycle to take into consideration the instruction cache
effects.
On v9 and later, which have branch prediction facilities, we set
it to the depth of the pipeline as that is the cost of a
mispredicted branch.
??? Set to 9 when PROCESSOR_ULTRASPARC3 is added */
#define BRANCH_COST \
((sparc_cpu == PROCESSOR_V9 \
|| sparc_cpu == PROCESSOR_ULTRASPARC) \
? 7 : 3)
/* Provide the costs of a rtl expression. This is in the body of a
switch on CODE. The purpose for the cost of MULT is to encourage
`synth_mult' to find a synthetic multiply when reasonable.

4
gcc/fold-const.c
View File

@ -106,10 +106,6 @@ static tree fold_binary_op_with_conditional_arg
PARAMS ((enum tree_code, tree, tree, tree, int));
static bool fold_real_zero_addition_p PARAMS ((tree, tree, int));
#ifndef BRANCH_COST
#define BRANCH_COST 1
#endif
#if defined(HOST_EBCDIC)
/* bit 8 is significant in EBCDIC */
#define CHARMASK 0xff