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);
#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
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 int
-mips_sched_reorder (FILE *file ATTRIBUTE_UNUSED, int verbose ATTRIBUTE_UNUSED,
- rtx *ready, int *nreadyp, int cycle)
+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)
{
- if (!reload_completed && TUNE_MACC_CHAINS)
+ int i;
+ int store_pos, load_pos;
+
+ store_pos = -1;
+ load_pos = -1;
+
+ for (i = nready - 1; i >= 0; i--)
{
- if (cycle == 0)
- mips_macc_chains_last_hilo = 0;
- if (*nreadyp > 0)
- mips_macc_chains_reorder (ready, *nreadyp);
+ 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 (reload_completed && TUNE_MIPS4130 && !TARGET_VR4130_ALIGN)
+
+ if (load_pos == -1 || store_pos == -1)
+ return;
+
+ switch (mips_last_74k_agen_insn)
{
- if (cycle == 0)
- vr4130_last_insn = 0;
- if (*nreadyp > 1)
- vr4130_reorder (ready, *nreadyp);
+ 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
+ && *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 ();
}
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: