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authorAlexey Neyman <stilor@att.net>2016-11-29 19:15:21 (GMT)
committerAlexey Neyman <stilor@att.net>2016-11-29 19:15:21 (GMT)
commit3285ccbd3eb07a43168b6fc56e02f56836b44efe (patch)
treea7deb06254d6176f5b7b43759e13d56a2dcbd777 /patches/gcc/6.2.0/831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch
parente3c764cc2d6787a7363a1abab4150f1358e88736 (diff)
Sync up with buildroot GCC 6.2.0 patches.
Additionally, copy from 5.4.0: - 910-nios2-bad-multilib-default.patch (needed for nios2 sample) - 930-libgcc-disable-split-stack-nothreads.patch (applicable to 6.2.0 as well) Signed-off-by: Alexey Neyman <stilor@att.net>
Diffstat (limited to 'patches/gcc/6.2.0/831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch')
-rw-r--r--patches/gcc/6.2.0/831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch69
1 files changed, 69 insertions, 0 deletions
diff --git a/patches/gcc/6.2.0/831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch b/patches/gcc/6.2.0/831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch
new file mode 100644
index 0000000..af9fb1d
--- /dev/null
+++ b/patches/gcc/6.2.0/831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch
@@ -0,0 +1,69 @@
+From 07453188b18a2cbe815917dbb893b4ebfdd793b6 Mon Sep 17 00:00:00 2001
+From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Fri, 26 Aug 2016 10:23:20 +0000
+Subject: [PATCH] [ARM] PR target/70473: Reduce size of Cortex-A8 automaton
+
+ PR target/70473
+ * config/arm/cortex-a8-neon.md (cortex_a8_vfp_muld): Reduce
+ reservation duration to 15 cycles.
+ (cortex_a8_vfp_macs): Likewise.
+ (cortex_a8_vfp_macd): Likewise.
+ (cortex_a8_vfp_divs): Likewise.
+ (cortex_a8_vfp_divd): Likewise.
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@239772
+138bc75d-0d04-0410-961f-82ee72b054a4
+
+[Backport from gcc upstream commit 79f5d5e3cd5a668d5ecb2b6b0cce80ef5706ac53.]
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ gcc/config/arm/cortex-a8-neon.md | 14 +++++++++-----
+ 1 file changed, 9 insertions(+), 5 deletions(-)
+
+diff --git a/gcc/config/arm/cortex-a8-neon.md b/gcc/config/arm/cortex-a8-neon.md
+index 45f861f..b16c299 100644
+--- a/gcc/config/arm/cortex-a8-neon.md
++++ b/gcc/config/arm/cortex-a8-neon.md
+@@ -357,30 +357,34 @@
+ (eq_attr "type" "fmuls"))
+ "cortex_a8_vfp,cortex_a8_vfplite*11")
+
++;; Don't model a reservation for more than 15 cycles as this explodes the
++;; state space of the automaton for little gain. It is unlikely that the
++;; scheduler will find enough instructions to hide the full latency of the
++;; instructions.
+ (define_insn_reservation "cortex_a8_vfp_muld" 17
+ (and (eq_attr "tune" "cortexa8")
+ (eq_attr "type" "fmuld"))
+- "cortex_a8_vfp,cortex_a8_vfplite*16")
++ "cortex_a8_vfp,cortex_a8_vfplite*15")
+
+ (define_insn_reservation "cortex_a8_vfp_macs" 21
+ (and (eq_attr "tune" "cortexa8")
+ (eq_attr "type" "fmacs,ffmas"))
+- "cortex_a8_vfp,cortex_a8_vfplite*20")
++ "cortex_a8_vfp,cortex_a8_vfplite*15")
+
+ (define_insn_reservation "cortex_a8_vfp_macd" 26
+ (and (eq_attr "tune" "cortexa8")
+ (eq_attr "type" "fmacd,ffmad"))
+- "cortex_a8_vfp,cortex_a8_vfplite*25")
++ "cortex_a8_vfp,cortex_a8_vfplite*15")
+
+ (define_insn_reservation "cortex_a8_vfp_divs" 37
+ (and (eq_attr "tune" "cortexa8")
+ (eq_attr "type" "fdivs, fsqrts"))
+- "cortex_a8_vfp,cortex_a8_vfplite*36")
++ "cortex_a8_vfp,cortex_a8_vfplite*15")
+
+ (define_insn_reservation "cortex_a8_vfp_divd" 65
+ (and (eq_attr "tune" "cortexa8")
+ (eq_attr "type" "fdivd, fsqrtd"))
+- "cortex_a8_vfp,cortex_a8_vfplite*64")
++ "cortex_a8_vfp,cortex_a8_vfplite*15")
+
+ ;; Comparisons can actually take 7 cycles sometimes instead of four,
+ ;; but given all the other instructions lumped into type=ffarith that
+--
+2.7.4
+