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author | Alexey Neyman <stilor@att.net> | 2017-01-10 18:36:23 (GMT) |
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committer | GitHub <noreply@github.com> | 2017-01-10 18:36:23 (GMT) |
commit | abdaa36b5ab0a46055248bc437d0f74183984d78 (patch) | |
tree | 251acfdd28203230bbc2d39370fd9c93515f01cd /patches/gcc/6.3.0/831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch | |
parent | a2d49174dffdb9e33aa6cb53da16d84824fd4ed6 (diff) | |
parent | e427a6408f61a1950ad2dfa5ac32853dcb391be7 (diff) |
Merge pull request #515 from InfernoEmbedded/arm-toolchain-update
Arm toolchain update
Diffstat (limited to 'patches/gcc/6.3.0/831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch')
-rw-r--r-- | patches/gcc/6.3.0/831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/patches/gcc/6.3.0/831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch b/patches/gcc/6.3.0/831-ARM-PR-target-70473-Reduce-size-of-Cortex-A8-automat.patch new file mode 100644 index 0000000..af9fb1d --- /dev/null +++ b/patches/gcc/6.3.0/831-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 + |