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authorDenys Dmytriyenko <denis@denix.org>2009-03-17 14:32:59 -0400
committerDenys Dmytriyenko <denis@denix.org>2009-03-17 14:32:59 -0400
commit709c4d66e0b107ca606941b988bad717c0b45d9b (patch)
tree37ee08b1eb308f3b2b6426d5793545c38396b838 /recipes/gcc/gcc-3.3.3/arm-ldm-peephole.patch
parentfa6cd5a3b993f16c27de4ff82b42684516d433ba (diff)
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rename packages/ to recipes/ per earlier agreement
See links below for more details: http://thread.gmane.org/gmane.comp.handhelds.openembedded/21326 http://thread.gmane.org/gmane.comp.handhelds.openembedded/21816 Signed-off-by: Denys Dmytriyenko <denis@denix.org> Acked-by: Mike Westerhof <mwester@dls.net> Acked-by: Philip Balister <philip@balister.org> Acked-by: Khem Raj <raj.khem@gmail.com> Acked-by: Marcin Juszkiewicz <hrw@openembedded.org> Acked-by: Koen Kooi <koen@openembedded.org> Acked-by: Frans Meulenbroeks <fransmeulenbroeks@gmail.com>
Diffstat (limited to 'recipes/gcc/gcc-3.3.3/arm-ldm-peephole.patch')
-rw-r--r--recipes/gcc/gcc-3.3.3/arm-ldm-peephole.patch91
1 files changed, 91 insertions, 0 deletions
diff --git a/recipes/gcc/gcc-3.3.3/arm-ldm-peephole.patch b/recipes/gcc/gcc-3.3.3/arm-ldm-peephole.patch
new file mode 100644
index 0000000000..83b07e0343
--- /dev/null
+++ b/recipes/gcc/gcc-3.3.3/arm-ldm-peephole.patch
@@ -0,0 +1,91 @@
+2004-03-19 Philip Blundell <philb@gnu.org>
+
+ * config/arm/arm.c (adjacent_mem_locations): Reject location pairs
+ where both offsets are nonzero if target is Harvard architecture.
+ (load_multiple_sequence, store_multiple_sequence): Avoid two-word
+ LDM/STM on XScale unless -Os.
+ * config/arm/arm.md (arith_adjacentmem): Inhibit if tuning for
+ XScale and not -Os.
+ * genpeep.c: Have generated code include flags.h.
+
+--- gcc/genpeep.c~ 2001-12-02 00:04:19.000000000 +0000
++++ gcc/genpeep.c 2004-03-19 11:17:18.000000000 +0000
+@@ -402,6 +402,7 @@
+ 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");
+
+--- gcc/config/arm/arm.md~ 2004-03-11 15:28:01.000000000 +0000
++++ gcc/config/arm/arm.md 2004-03-19 13:00:03.000000000 +0000
+@@ -7958,13 +7958,16 @@
+ (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];
+@@ -7999,7 +8002,9 @@
+ }
+ 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/config/arm/arm.c~ 2004-03-11 15:28:01.000000000 +0000
++++ gcc/config/arm/arm.c 2004-03-19 15:36:03.000000000 +0000
+@@ -3818,8 +3818,11 @@
+ 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;
+ }
+@@ -4075,6 +4078,11 @@
+ *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 */
+
+@@ -4307,6 +4315,11 @@
+ *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 */
+