aboutsummaryrefslogtreecommitdiff
path: root/gcc
diff options
context:
space:
mode:
Diffstat (limited to 'gcc')
-rw-r--r--gcc/ChangeLog7
-rw-r--r--gcc/config/m68k/m68k.c19
2 files changed, 20 insertions, 6 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index db6b316..6c4e28d 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+2003-08-21 Bernardo Innocenti <bernie@develer.com>
+ Paul Dale <pauli@snapgear.com>
+ Peter Barada <peter@baradas.org>
+
+ * config/m68k/m68k.c (m68k_rtx_costs): Adjust mul/div costs for
+ ColdFire cores.
+
2003-08-21 Zack Weinberg <zack@codesourcery.com>
* Makefile.in (INCLUDES): Remove -I$(srcdir)/config.
diff --git a/gcc/config/m68k/m68k.c b/gcc/config/m68k/m68k.c
index e304a65..9d142c5 100644
--- a/gcc/config/m68k/m68k.c
+++ b/gcc/config/m68k/m68k.c
@@ -1507,9 +1507,10 @@ m68k_rtx_costs (x, code, outer_code, total)
for add and the time for shift, taking away a little more because
sometimes move insns are needed. */
/* div?.w is relatively cheaper on 68000 counted in COSTS_N_INSNS terms. */
-#define MULL_COST (TARGET_68060 ? 2 : TARGET_68040 ? 5 : 13)
-#define MULW_COST (TARGET_68060 ? 2 : TARGET_68040 ? 3 : TARGET_68020 ? 8 : 5)
-#define DIVW_COST (TARGET_68020 ? 27 : 12)
+#define MULL_COST (TARGET_68060 ? 2 : TARGET_68040 ? 5 : TARGET_CFV3 ? 3 : TARGET_COLDFIRE ? 10 : 13)
+#define MULW_COST (TARGET_68060 ? 2 : TARGET_68040 ? 3 : TARGET_68020 ? 8 : \
+ TARGET_CFV3 ? 2 : 5)
+#define DIVW_COST (TARGET_68020 ? 27 : TARGET_CF_HWDIV ? 11 : 12)
case PLUS:
/* An lea costs about three times as much as a simple add. */
@@ -1521,7 +1522,11 @@ m68k_rtx_costs (x, code, outer_code, total)
&& (INTVAL (XEXP (XEXP (x, 0), 1)) == 2
|| INTVAL (XEXP (XEXP (x, 0), 1)) == 4
|| INTVAL (XEXP (XEXP (x, 0), 1)) == 8))
- *total = COSTS_N_INSNS (3); /* lea an@(dx:l:i),am */
+ {
+ /* lea an@(dx:l:i),am */
+ *total = COSTS_N_INSNS (TARGET_COLDFIRE ? 2 : 3);
+ return true;
+ }
return false;
case ASHIFT:
@@ -1532,7 +1537,7 @@ m68k_rtx_costs (x, code, outer_code, total)
*total = COSTS_N_INSNS(1);
return true;
}
- if (! TARGET_68020)
+ if (! TARGET_68020 && ! TARGET_COLDFIRE)
{
if (GET_CODE (XEXP (x, 1)) == CONST_INT)
{
@@ -1557,7 +1562,7 @@ m68k_rtx_costs (x, code, outer_code, total)
&& !(INTVAL (XEXP (x, 1)) > 0
&& INTVAL (XEXP (x, 1)) <= 8))
{
- *total = COSTS_N_INSNS (3); /* lsr #i,dn */
+ *total = COSTS_N_INSNS (TARGET_COLDFIRE ? 1 : 3); /* lsr #i,dn */
return true;
}
return false;
@@ -1579,6 +1584,8 @@ m68k_rtx_costs (x, code, outer_code, total)
case UMOD:
if (GET_MODE (x) == QImode || GET_MODE (x) == HImode)
*total = COSTS_N_INSNS (DIVW_COST); /* div.w */
+ else if (TARGET_CF_HWDIV)
+ *total = COSTS_N_INSNS (18);
else
*total = COSTS_N_INSNS (43); /* div.l */
return true;