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mips.c (TARGET_SCHED_INIT): Define.

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2007-08-10  Sandra Loosemore  <sandra@codesourcery.com>
	    David Ung  <davidu@mips.com>

        gcc/
	* config/mips/mips.c (TARGET_SCHED_INIT): Define.
	(TARGET_SCHED_REORDER2): Define.
	(mips_maybe_swap_ready): New.
	(mips_last_74k_agen_insn): New.
	(mips_74k_agen_init): New.
	(mips_74k_agen_reorder): New function to group loads and stores
	in the ready queue.
	(mips_sched_init): New.  
	(mips_sched_reorder): Don't do initialization here.  Call
	mips_74k_agen_reorder.
	(mips_variable_issue): Call mips_74k_agen_init.

Co-Authored-By: David Ung <davidu@mips.com>

From-SVN: r127341
This commit is contained in:
Sandra Loosemore 2007-08-10 12:35:49 -04:00 committed by Sandra Loosemore
parent 6aab184c1d
commit 174bd8cad0
2 changed files with 136 additions and 15 deletions
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15
gcc/ChangeLog
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@ -1,3 +1,18 @@
2007-08-10 Sandra Loosemore <sandra@codesourcery.com>
David Ung <davidu@mips.com>
* config/mips/mips.c (TARGET_SCHED_INIT): Define.
(TARGET_SCHED_REORDER2): Define.
(mips_maybe_swap_ready): New.
(mips_last_74k_agen_insn): New.
(mips_74k_agen_init): New.
(mips_74k_agen_reorder): New function to group loads and stores
in the ready queue.
(mips_sched_init): New.
(mips_sched_reorder): Don't do initialization here. Call
mips_74k_agen_reorder.
(mips_variable_issue): Call mips_74k_agen_init.
2007-08-10 Aldy Hernandez <aldyh@redhat.com>
* tree-flow-inline.h (get_filename): Remove.

136
gcc/config/mips/mips.c
View File

@ -390,6 +390,7 @@ static bool vr4130_true_reg_dependence_p (rtx);
static bool vr4130_swap_insns_p (rtx, rtx);
static void vr4130_reorder (rtx *, int);
static void mips_promote_ready (rtx *, int, int);
static void mips_sched_init (FILE *, int, int);
static int mips_sched_reorder (FILE *, int, rtx *, int *, int);
static int mips_variable_issue (FILE *, int, rtx, int);
static int mips_adjust_cost (rtx, rtx, rtx, int);
@ -1220,8 +1221,12 @@ static const unsigned char mips16e_save_restore_regs[] = {
#undef TARGET_ASM_FUNCTION_RODATA_SECTION
#define TARGET_ASM_FUNCTION_RODATA_SECTION mips_function_rodata_section
#undef TARGET_SCHED_INIT
#define TARGET_SCHED_INIT mips_sched_init
#undef TARGET_SCHED_REORDER
#define TARGET_SCHED_REORDER mips_sched_reorder
#undef TARGET_SCHED_REORDER2
#define TARGET_SCHED_REORDER2 mips_sched_reorder
#undef TARGET_SCHED_VARIABLE_ISSUE
#define TARGET_SCHED_VARIABLE_ISSUE mips_variable_issue
#undef TARGET_SCHED_ADJUST_COST
@ -11000,26 +11005,125 @@ mips_promote_ready (rtx *ready, int lower, int higher)
ready[i] = new_head;
}
/* Implement TARGET_SCHED_REORDER. */
/* If the priority of the instruction at POS2 in the ready queue READY
is within LIMIT units of that of the instruction at POS1, swap the
instructions if POS2 is not already less than POS1. */
static void
mips_maybe_swap_ready (rtx *ready, int pos1, int pos2, int limit)
{
if (pos1 < pos2
&& INSN_PRIORITY (ready[pos1]) + limit >= INSN_PRIORITY (ready[pos2]))
{
rtx temp;
temp = ready[pos1];
ready[pos1] = ready[pos2];
ready[pos2] = temp;
}
}
/* Record whether last 74k AGEN instruction was a load or store. */
static enum attr_type mips_last_74k_agen_insn = TYPE_UNKNOWN;
/* Initialize mips_last_74k_agen_insn from INSN. A null argument
resets to TYPE_UNKNOWN state. */
static void
mips_74k_agen_init (rtx insn)
{
if (!insn || !NONJUMP_INSN_P (insn))
mips_last_74k_agen_insn = TYPE_UNKNOWN;
else if (USEFUL_INSN_P (insn))
{
enum attr_type type = get_attr_type (insn);
if (type == TYPE_LOAD || type == TYPE_STORE)
mips_last_74k_agen_insn = type;
}
}
/* A TUNE_74K helper function. The 74K AGEN pipeline likes multiple
loads to be grouped together, and multiple stores to be grouped
together. Swap things around in the ready queue to make this happen. */
static void
mips_74k_agen_reorder (rtx *ready, int nready)
{
int i;
int store_pos, load_pos;
store_pos = -1;
load_pos = -1;
for (i = nready - 1; i >= 0; i--)
{
rtx insn = ready[i];
if (USEFUL_INSN_P (insn))
switch (get_attr_type (insn))
{
case TYPE_STORE:
if (store_pos == -1)
store_pos = i;
break;
case TYPE_LOAD:
if (load_pos == -1)
load_pos = i;
break;
default:
break;
}
}
if (load_pos == -1 || store_pos == -1)
return;
switch (mips_last_74k_agen_insn)
{
case TYPE_UNKNOWN:
/* Prefer to schedule loads since they have a higher latency. */
case TYPE_LOAD:
/* Swap loads to the front of the queue. */
mips_maybe_swap_ready (ready, load_pos, store_pos, 4);
break;
case TYPE_STORE:
/* Swap stores to the front of the queue. */
mips_maybe_swap_ready (ready, store_pos, load_pos, 4);
break;
default:
break;
}
}
/* Implement TARGET_SCHED_INIT. */
static void
mips_sched_init (FILE *file ATTRIBUTE_UNUSED, int verbose ATTRIBUTE_UNUSED,
int max_ready ATTRIBUTE_UNUSED)
{
mips_macc_chains_last_hilo = 0;
vr4130_last_insn = 0;
mips_74k_agen_init (NULL_RTX);
}
/* Implement TARGET_SCHED_REORDER and TARG_SCHED_REORDER2. */
static int
mips_sched_reorder (FILE *file ATTRIBUTE_UNUSED, int verbose ATTRIBUTE_UNUSED,
rtx *ready, int *nreadyp, int cycle)
{
if (!reload_completed && TUNE_MACC_CHAINS)
{
if (cycle == 0)
mips_macc_chains_last_hilo = 0;
if (*nreadyp > 0)
mips_macc_chains_reorder (ready, *nreadyp);
}
if (reload_completed && TUNE_MIPS4130 && !TARGET_VR4130_ALIGN)
{
if (cycle == 0)
vr4130_last_insn = 0;
if (*nreadyp > 1)
vr4130_reorder (ready, *nreadyp);
}
if (!reload_completed
&& TUNE_MACC_CHAINS
&& *nreadyp > 0)
mips_macc_chains_reorder (ready, *nreadyp);
if (reload_completed
&& TUNE_MIPS4130
&& !TARGET_VR4130_ALIGN
&& *nreadyp > 1)
vr4130_reorder (ready, *nreadyp);
if (TUNE_74K)
mips_74k_agen_reorder (ready, *nreadyp);
return mips_issue_rate ();
}
@ -11029,6 +11133,8 @@ static int
mips_variable_issue (FILE *file ATTRIBUTE_UNUSED, int verbose ATTRIBUTE_UNUSED,
rtx insn, int more)
{
if (TUNE_74K)
mips_74k_agen_init (insn);
switch (GET_CODE (PATTERN (insn)))
{
case USE: