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s390.c (struct processor_costs): Two new fields: madbr, maebr.

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2004-12-16  Mark Dettinger  <dettinge@de.ibm.com>

	* config/s390/s390.c (struct processor_costs): Two new fields:
	madbr, maebr.
	(s390_rtx_costs): Added handling of multipy and add in SFmode.
	More precise values for cost of multiply and add.

From-SVN: r92259
This commit is contained in:
Mark Dettinger 2004-12-16 12:31:32 +00:00 committed by Ulrich Weigand
parent cacd0a2ccf
commit b75d6babbc
2 changed files with 19 additions and 3 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2004-12-16 Mark Dettinger <dettinge@de.ibm.com>
* config/s390/s390.c (struct processor_costs): Two new fields:
madbr, maebr.
(s390_rtx_costs): Added handling of multipy and add in SFmode.
More precise values for cost of multiply and add.
2004-12-15 Richard Henderson <rth@redhat.com>
PR target/19028

15
gcc/config/s390/s390.c
View File

@ -105,6 +105,8 @@ struct processor_costs
const int mult_df; /* cost of multiplication in DFmode. */
const int sqdbr; /* cost of square root in DFmode. */
const int sqebr; /* cost of square root in SFmode. */
const int madbr; /* cost of multiply and add in DFmode. */
const int maebr; /* cost of multiply and add in SFmode. */
};
const struct processor_costs *s390_cost;
@ -127,6 +129,8 @@ struct processor_costs z900_cost =
COSTS_N_INSNS (7), /* multiplication in DFmode */
COSTS_N_INSNS (44), /* SQDBR */
COSTS_N_INSNS (35), /* SQEBR */
COSTS_N_INSNS (18), /* MADBR */
COSTS_N_INSNS (13), /* MAEBR */
};
static const
@ -147,6 +151,8 @@ struct processor_costs z990_cost =
COSTS_N_INSNS (1), /* multiplication in DFmode */
COSTS_N_INSNS (66), /* SQDBR */
COSTS_N_INSNS (38), /* SQEBR */
COSTS_N_INSNS (1), /* MADBR */
COSTS_N_INSNS (1), /* MAEBR */
};
@ -1902,13 +1908,16 @@ s390_rtx_costs (rtx x, int code, int outer_code, int *total)
case PLUS:
case MINUS:
/* Check for multiply and add. */
if (GET_MODE (x) == DFmode
if ((GET_MODE (x) == DFmode || GET_MODE (x) == SFmode)
&& GET_CODE (XEXP (x, 0)) == MULT
&& TARGET_HARD_FLOAT && TARGET_IEEE_FLOAT && TARGET_FUSED_MADD)
{
/* This is the multiply and add case. */
*total = s390_cost->mult_df
+ rtx_cost (XEXP (XEXP (x, 0), 0), MULT)
if (GET_MODE (x) == DFmode)
*total = s390_cost->madbr;
else
*total = s390_cost->maebr;
*total += rtx_cost (XEXP (XEXP (x, 0), 0), MULT)
+ rtx_cost (XEXP (XEXP (x, 0), 1), MULT)
+ rtx_cost (XEXP (x, 1), code);
return true; /* Do not do an additional recursive descent. */