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m68k.c (m68k_rtx_costs): Adjust mul/div costs for ColdFire cores.

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* config/m68k/m68k.c (m68k_rtx_costs): Adjust mul/div costs for
	ColdFire cores.

Co-Authored-By: Paul Dale <pauli@snapgear.com>
Co-Authored-By: Peter Barada <peter@baradas.org>

From-SVN: r70653
This commit is contained in:
Bernardo Innocenti 2003-08-21 19:47:41 +02:00 committed by Bernardo Innocenti
parent f3c2dfc629
commit eb84999398
2 changed files with 20 additions and 6 deletions
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7
gcc/ChangeLog
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@ -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.

19
gcc/config/m68k/m68k.c
View File

@ -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;