mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-25 16:52:48 +02:00
80 lines
2.9 KiB
Diff
80 lines
2.9 KiB
Diff
--- gcc-3.4.0/gcc/config/arm/arm.md.arm-ldm-peephole 2004-01-13 08:24:37.000000000 -0500
|
|
+++ gcc-3.4.0/gcc/config/arm/arm.md 2004-04-24 18:18:04.000000000 -0400
|
|
@@ -8810,13 +8810,16 @@
|
|
(set_attr "length" "4,8,8")]
|
|
)
|
|
|
|
+; Try to convert LDR+LDR+arith into [add+]LDM+arith
|
|
+; On XScale, LDM is always slower than two LDRs, so only do this if
|
|
+; optimising for size.
|
|
(define_insn "*arith_adjacentmem"
|
|
[(set (match_operand:SI 0 "s_register_operand" "=r")
|
|
(match_operator:SI 1 "shiftable_operator"
|
|
[(match_operand:SI 2 "memory_operand" "m")
|
|
(match_operand:SI 3 "memory_operand" "m")]))
|
|
(clobber (match_scratch:SI 4 "=r"))]
|
|
- "TARGET_ARM && adjacent_mem_locations (operands[2], operands[3])"
|
|
+ "TARGET_ARM && (!arm_tune_xscale || optimize_size) && adjacent_mem_locations (operands[2], operands[3])"
|
|
"*
|
|
{
|
|
rtx ldm[3];
|
|
@@ -8851,6 +8854,8 @@
|
|
}
|
|
if (val1 && val2)
|
|
{
|
|
+ /* This would be a loss on a Harvard core, but adjacent_mem_locations()
|
|
+ will prevent it from happening. */
|
|
rtx ops[3];
|
|
ldm[0] = ops[0] = operands[4];
|
|
ops[1] = XEXP (XEXP (operands[2], 0), 0);
|
|
--- gcc-3.4.0/gcc/config/arm/arm.c.arm-ldm-peephole 2004-04-24 18:16:25.000000000 -0400
|
|
+++ gcc-3.4.0/gcc/config/arm/arm.c 2004-04-24 18:18:04.000000000 -0400
|
|
@@ -4593,8 +4593,11 @@
|
|
arith_adjacentmem pattern to output an overlong sequence. */
|
|
if (!const_ok_for_op (PLUS, val0) || !const_ok_for_op (PLUS, val1))
|
|
return 0;
|
|
-
|
|
- return (reg0 == reg1) && ((val1 - val0) == 4 || (val0 - val1) == 4);
|
|
+
|
|
+ /* For Harvard cores, only accept pairs where one offset is zero.
|
|
+ See comment in load_multiple_sequence. */
|
|
+ return (reg0 == reg1) && ((val1 - val0) == 4 || (val0 - val1) == 4)
|
|
+ && (!arm_ld_sched || val0 == 0 || val1 == 0);
|
|
}
|
|
return 0;
|
|
}
|
|
@@ -4838,6 +4841,11 @@
|
|
*load_offset = unsorted_offsets[order[0]];
|
|
}
|
|
|
|
+ /* For XScale a two-word LDM is a performance loss, so only do this if
|
|
+ size is more important. See comments in arm_gen_load_multiple. */
|
|
+ if (nops == 2 && arm_tune_xscale && !optimize_size)
|
|
+ return 0;
|
|
+
|
|
if (unsorted_offsets[order[0]] == 0)
|
|
return 1; /* ldmia */
|
|
|
|
@@ -5064,6 +5072,11 @@
|
|
*load_offset = unsorted_offsets[order[0]];
|
|
}
|
|
|
|
+ /* For XScale a two-word LDM is a performance loss, so only do this if
|
|
+ size is more important. See comments in arm_gen_load_multiple. */
|
|
+ if (nops == 2 && arm_tune_xscale && !optimize_size)
|
|
+ return 0;
|
|
+
|
|
if (unsorted_offsets[order[0]] == 0)
|
|
return 1; /* stmia */
|
|
|
|
--- gcc-3.4.0/gcc/genpeep.c.arm-ldm-peephole 2003-07-05 01:27:22.000000000 -0400
|
|
+++ gcc-3.4.0/gcc/genpeep.c 2004-04-24 18:18:04.000000000 -0400
|
|
@@ -381,6 +381,7 @@
|
|
printf ("#include \"recog.h\"\n");
|
|
printf ("#include \"except.h\"\n\n");
|
|
printf ("#include \"function.h\"\n\n");
|
|
+ printf ("#include \"flags.h\"\n\n");
|
|
|
|
printf ("#ifdef HAVE_peephole\n");
|
|
printf ("extern rtx peep_operand[];\n\n");
|