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i386-protos.h (ix86_memory_move_cost): Move offline.

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* i386-protos.h (ix86_memory_move_cost): Move offline.
	* i386.c (ix86_register_move_cost): Compute properly cost of
	SSE, MMX and i387 instructions.
	(*_cost): Add costs of SSE/MMX moves.
	(ix86_memory_move_cost): Move offline from ....; Likewise.
	* i386.h (MEMORY_MOVE_COST): .... here;
	(struct processor costs): Add new fields to represent costs
	of SSE/MMX moves.

From-SVN: r39689
This commit is contained in:
Jan Hubicka 2001-02-14 22:16:35 +01:00 committed by Jan Hubicka
parent 6836e0240e
commit fa79946ef5
4 changed files with 200 additions and 28 deletions
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11
gcc/ChangeLog
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@ -1,3 +1,14 @@
Wed Feb 14 11:12:38 CET 2001 Jan Hubicka <jh@suse.cz>
* i386-protos.h (ix86_memory_move_cost): Move offline.
* i386.c (ix86_register_move_cost): Compute properly cost of
SSE, MMX and i387 instructions.
(*_cost): Add costs of SSE/MMX moves.
(ix86_memory_move_cost): Move offline from ....; Likewise.
* i386.h (MEMORY_MOVE_COST): .... here;
(struct processor costs): Add new fields to represent costs
of SSE/MMX moves.
Wed Feb 14 10:08:26 CET 2001 Jan Hubicka <jh@suse.cz> Wed Feb 14 10:08:26 CET 2001 Jan Hubicka <jh@suse.cz>
* regclass.c (init_reg_sets_1): Reinstall the optimization of * regclass.c (init_reg_sets_1): Reinstall the optimization of

2
gcc/config/i386/i386-protos.h
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@ -139,6 +139,8 @@ extern int ix86_secondary_memory_needed PARAMS ((enum reg_class,
enum machine_mode, int)); enum machine_mode, int));
extern enum reg_class ix86_preferred_reload_class PARAMS ((rtx, extern enum reg_class ix86_preferred_reload_class PARAMS ((rtx,
enum reg_class)); enum reg_class));
extern int ix86_memory_move_cost PARAMS ((enum machine_mode, enum reg_class,
int));
#ifdef TREE_CODE #ifdef TREE_CODE
extern void init_cumulative_args PARAMS ((CUMULATIVE_ARGS *, tree, rtx)); extern void init_cumulative_args PARAMS ((CUMULATIVE_ARGS *, tree, rtx));

179
gcc/config/i386/i386.c
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@ -65,7 +65,18 @@ struct processor_costs i386_cost = { /* 386 specific costs */
2, /* cost of reg,reg fld/fst */ 2, /* cost of reg,reg fld/fst */
{8, 8, 8}, /* cost of loading fp registers {8, 8, 8}, /* cost of loading fp registers
in SFmode, DFmode and XFmode */ in SFmode, DFmode and XFmode */
{8, 8, 8} /* cost of loading integer registers */ {8, 8, 8}, /* cost of loading integer registers */
2, /* cost of moving MMX register */
{4, 8}, /* cost of loading MMX registers
in SImode and DImode */
{4, 8}, /* cost of storing MMX registers
in SImode and DImode */
2, /* cost of moving SSE register */
{4, 8, 16}, /* cost of loading SSE registers
in SImode, DImode and TImode */
{4, 8, 16}, /* cost of storing SSE registers
in SImode, DImode and TImode */
3, /* MMX or SSE register to integer */
}; };
struct processor_costs i486_cost = { /* 486 specific costs */ struct processor_costs i486_cost = { /* 486 specific costs */
@ -86,7 +97,18 @@ struct processor_costs i486_cost = { /* 486 specific costs */
2, /* cost of reg,reg fld/fst */ 2, /* cost of reg,reg fld/fst */
{8, 8, 8}, /* cost of loading fp registers {8, 8, 8}, /* cost of loading fp registers
in SFmode, DFmode and XFmode */ in SFmode, DFmode and XFmode */
{8, 8, 8} /* cost of loading integer registers */ {8, 8, 8}, /* cost of loading integer registers */
2, /* cost of moving MMX register */
{4, 8}, /* cost of loading MMX registers
in SImode and DImode */
{4, 8}, /* cost of storing MMX registers
in SImode and DImode */
2, /* cost of moving SSE register */
{4, 8, 16}, /* cost of loading SSE registers
in SImode, DImode and TImode */
{4, 8, 16}, /* cost of storing SSE registers
in SImode, DImode and TImode */
3 /* MMX or SSE register to integer */
}; };
struct processor_costs pentium_cost = { struct processor_costs pentium_cost = {
@ -107,7 +129,18 @@ struct processor_costs pentium_cost = {
2, /* cost of reg,reg fld/fst */ 2, /* cost of reg,reg fld/fst */
{2, 2, 6}, /* cost of loading fp registers {2, 2, 6}, /* cost of loading fp registers
in SFmode, DFmode and XFmode */ in SFmode, DFmode and XFmode */
{4, 4, 6} /* cost of loading integer registers */ {4, 4, 6}, /* cost of loading integer registers */
8, /* cost of moving MMX register */
{8, 8}, /* cost of loading MMX registers
in SImode and DImode */
{8, 8}, /* cost of storing MMX registers
in SImode and DImode */
2, /* cost of moving SSE register */
{4, 8, 16}, /* cost of loading SSE registers
in SImode, DImode and TImode */
{4, 8, 16}, /* cost of storing SSE registers
in SImode, DImode and TImode */
3 /* MMX or SSE register to integer */
}; };
struct processor_costs pentiumpro_cost = { struct processor_costs pentiumpro_cost = {
@ -128,7 +161,18 @@ struct processor_costs pentiumpro_cost = {
2, /* cost of reg,reg fld/fst */ 2, /* cost of reg,reg fld/fst */
{2, 2, 6}, /* cost of loading fp registers {2, 2, 6}, /* cost of loading fp registers
in SFmode, DFmode and XFmode */ in SFmode, DFmode and XFmode */
{4, 4, 6} /* cost of loading integer registers */ {4, 4, 6}, /* cost of loading integer registers */
2, /* cost of moving MMX register */
{2, 2}, /* cost of loading MMX registers
in SImode and DImode */
{2, 2}, /* cost of storing MMX registers
in SImode and DImode */
2, /* cost of moving SSE register */
{2, 2, 8}, /* cost of loading SSE registers
in SImode, DImode and TImode */
{2, 2, 8}, /* cost of storing SSE registers
in SImode, DImode and TImode */
3 /* MMX or SSE register to integer */
}; };
struct processor_costs k6_cost = { struct processor_costs k6_cost = {
@ -149,7 +193,18 @@ struct processor_costs k6_cost = {
4, /* cost of reg,reg fld/fst */ 4, /* cost of reg,reg fld/fst */
{6, 6, 6}, /* cost of loading fp registers {6, 6, 6}, /* cost of loading fp registers
in SFmode, DFmode and XFmode */ in SFmode, DFmode and XFmode */
{4, 4, 4} /* cost of loading integer registers */ {4, 4, 4}, /* cost of loading integer registers */
2, /* cost of moving MMX register */
{2, 2}, /* cost of loading MMX registers
in SImode and DImode */
{2, 2}, /* cost of storing MMX registers
in SImode and DImode */
2, /* cost of moving SSE register */
{2, 2, 8}, /* cost of loading SSE registers
in SImode, DImode and TImode */
{2, 2, 8}, /* cost of storing SSE registers
in SImode, DImode and TImode */
6 /* MMX or SSE register to integer */
}; };
struct processor_costs athlon_cost = { struct processor_costs athlon_cost = {
@ -170,7 +225,18 @@ struct processor_costs athlon_cost = {
4, /* cost of reg,reg fld/fst */ 4, /* cost of reg,reg fld/fst */
{6, 6, 20}, /* cost of loading fp registers {6, 6, 20}, /* cost of loading fp registers
in SFmode, DFmode and XFmode */ in SFmode, DFmode and XFmode */
{4, 4, 16} /* cost of loading integer registers */ {4, 4, 16}, /* cost of loading integer registers */
2, /* cost of moving MMX register */
{2, 2}, /* cost of loading MMX registers
in SImode and DImode */
{2, 2}, /* cost of storing MMX registers
in SImode and DImode */
2, /* cost of moving SSE register */
{2, 2, 8}, /* cost of loading SSE registers
in SImode, DImode and TImode */
{2, 2, 8}, /* cost of storing SSE registers
in SImode, DImode and TImode */
6 /* MMX or SSE register to integer */
}; };
struct processor_costs *ix86_cost = &pentium_cost; struct processor_costs *ix86_cost = &pentium_cost;
@ -8854,7 +8920,13 @@ ix86_register_move_cost (mode, class1, class2)
??? We should make this cost CPU specific. */ ??? We should make this cost CPU specific. */
if (MMX_CLASS_P (class1) != MMX_CLASS_P (class2) if (MMX_CLASS_P (class1) != MMX_CLASS_P (class2)
|| SSE_CLASS_P (class1) != SSE_CLASS_P (class2)) || SSE_CLASS_P (class1) != SSE_CLASS_P (class2))
return 3; return ix86_cost->mmxsse_to_integer;
if (MAYBE_FLOAT_CLASS_P (class1))
return ix86_cost->fp_move;
if (MAYBE_SSE_CLASS_P (class1))
return ix86_cost->sse_move;
if (MAYBE_MMX_CLASS_P (class1))
return ix86_cost->mmx_move;
return 2; return 2;
} }
@ -8887,3 +8959,96 @@ ix86_hard_regno_mode_ok (regno, mode)
return 1; return 1;
return reload_in_progress || reload_completed || !TARGET_PARTIAL_REG_STALL; return reload_in_progress || reload_completed || !TARGET_PARTIAL_REG_STALL;
} }
/* Return the cost of moving data of mode M between a
register and memory. A value of 2 is the default; this cost is
relative to those in `REGISTER_MOVE_COST'.
If moving between registers and memory is more expensive than
between two registers, you should define this macro to express the
relative cost.
Model also increased moving costs of QImode registers in non
Q_REGS classes.
*/
int
ix86_memory_move_cost (mode, class, in)
enum machine_mode mode;
enum reg_class class;
int in;
{
if (FLOAT_CLASS_P (class))
{
int index;
switch (mode)
{
case SFmode:
index = 0;
break;
case DFmode:
index = 1;
break;
case XFmode:
case TFmode:
index = 2;
break;
default:
return 100;
}
return in ? ix86_cost->fp_load [index] : ix86_cost->fp_store [index];
}
if (SSE_CLASS_P (class))
{
int index;
switch (GET_MODE_SIZE (mode))
{
case 4:
index = 0;
break;
case 8:
index = 1;
break;
case 16:
index = 2;
break;
default:
return 100;
}
return in ? ix86_cost->sse_load [index] : ix86_cost->sse_store [index];
}
if (MMX_CLASS_P (class))
{
int index;
switch (GET_MODE_SIZE (mode))
{
case 4:
index = 0;
break;
case 8:
index = 1;
break;
default:
return 100;
}
return in ? ix86_cost->mmx_load [index] : ix86_cost->mmx_store [index];
}
switch (GET_MODE_SIZE (mode))
{
case 1:
if (in)
return (Q_CLASS_P (class) ? ix86_cost->int_load[0]
: ix86_cost->movzbl_load);
else
return (Q_CLASS_P (class) ? ix86_cost->int_store[0]
: ix86_cost->int_store[0] + 4);
break;
case 2:
return in ? ix86_cost->int_load[1] : ix86_cost->int_store[1];
default:
/* Compute number of 32bit moves needed. TFmode is moved as XFmode. */
if (mode == TFmode)
mode = XFmode;
return ((in ? ix86_cost->int_load[1] : ix86_cost->int_store[1])
* (int) GET_MODE_SIZE (mode) / 4);
}
}

36
gcc/config/i386/i386.h
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@ -72,6 +72,18 @@ struct processor_costs {
in SFmode, DFmode and XFmode */ in SFmode, DFmode and XFmode */
int fp_store[3]; /* cost of storing FP register int fp_store[3]; /* cost of storing FP register
in SFmode, DFmode and XFmode */ in SFmode, DFmode and XFmode */
int mmx_move; /* cost of moving MMX register. */
int mmx_load[2]; /* cost of loading MMX register
in SImode and DImode */
int mmx_store[2]; /* cost of storing MMX register
in SImode and DImode */
int sse_move; /* cost of moving SSE register. */
int sse_load[3]; /* cost of loading SSE register
in SImode, DImode and TImode*/
int sse_store[3]; /* cost of storing SSE register
in SImode, DImode and TImode*/
int mmxsse_to_integer; /* cost of moving mmxsse register to
integer and vice versa. */
}; };
extern struct processor_costs *ix86_cost; extern struct processor_costs *ix86_cost;
@ -2395,28 +2407,10 @@ while (0)
If moving between registers and memory is more expensive than If moving between registers and memory is more expensive than
between two registers, you should define this macro to express the between two registers, you should define this macro to express the
relative cost. relative cost. */
Model also increased moving costs of QImode registers in non
Q_REGS classes.
*/
#define MEMORY_MOVE_COST(MODE,CLASS,IN) \ #define MEMORY_MOVE_COST(MODE,CLASS,IN) \
(FLOAT_CLASS_P (CLASS) \ ix86_memory_move_cost (MODE, CLASS, IN)
? (GET_MODE_SIZE (MODE)==4 \
? (IN ? ix86_cost->fp_load[0] : ix86_cost->fp_store[0]) \
: (GET_MODE_SIZE (MODE)==8 \
? (IN ? ix86_cost->fp_load[1] : ix86_cost->fp_store[1]) \
: (IN ? ix86_cost->fp_load[2] : ix86_cost->fp_store[2]))) \
: (GET_MODE_SIZE (MODE)==1 \
? (IN ? (Q_CLASS_P (CLASS) ? ix86_cost->int_load[0] \
: ix86_cost->movzbl_load) \
: (Q_CLASS_P (CLASS) ? ix86_cost->int_store[0] \
: ix86_cost->int_store[0] + 4)) \
: (GET_MODE_SIZE (MODE)==2 \
? (IN ? ix86_cost->int_load[1] : ix86_cost->int_store[1]) \
: ((IN ? ix86_cost->int_load[2] : ix86_cost->int_store[2]) \
* (int) GET_MODE_SIZE (MODE) / 4))))
/* A C expression for the cost of a branch instruction. A value of 1 /* A C expression for the cost of a branch instruction. A value of 1
is the default; other values are interpreted relative to that. */ is the default; other values are interpreted relative to that. */