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The code originally comes from libaeabi-cortexm0. It is unclear
which exact git commit the code comes from, but since we have used
it without issue for 5 years, it is reliable, and a refresh is
probably not required at this stage.
BRANCH=none
BUG=chromium:884905
TEST=make buildall -j, which also include basic tests.
Change-Id: I910c1c4e6a46b2f0fe8b7a429f1b6f0f50c2dc21
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1599762
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
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Compared the disassembly between compiling with gcc before this change
and compiling with clang after the change:
arm-none-eabi-objdump --disassemble
build/nocturne_fp/RW/core/cortex-m/uldivmod.o
--- gcc-uldivmod.txt 2019-02-12 14:54:47.283162092 -0800
+++ clang-uldivmod.txt 2019-02-12 14:52:50.098690222 -0800
@@ -103,5 +103,5 @@
000000b8 <__aeabi_ldiv0>:
b8: 4c01 ldr r4, [pc, #4] ; (c0 <__aeabi_ldiv0+0x8>)
ba: f7ff fffe bl 0 <exception_panic>
- be: 0000 .short 0x0000
+ be: bf00 nop
c0: dead6660 .word 0xdead6660
BRANCH=nocturne,nami
BUG=chromium:931797
TEST=compare disassembly (see above)
Change-Id: I9ab7eb18ffa9bf3e319cdd1f81047577218a0dad
Signed-off-by: Tom Hughes <tomhughes@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1470777
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
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L_fallback_32bits: section did not compute remainder correctly.
L_sub_loop1: section did not track r6 correctly.
Also correctly annotate which instructions need to set the flags.
BRANCH=none
BUG=none
TEST=now passes the tests in
http://www.hackersdelight.org/hdcodetxt/divmnu64.c.txt
Change-Id: Ib55a3bbbcee35c7f21dc67f51038783ea1d26f6c
Reviewed-on: https://chromium-review.googlesource.com/396397
Commit-Ready: Marius Schilder <mschilder@chromium.org>
Tested-by: Marius Schilder <mschilder@chromium.org>
Reviewed-by: Marius Schilder <mschilder@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
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Make non-exception "software" panics such as stack overflow and assert
failure save a panic log. Log the panic type in r4, and misc. panic data
in r5 so that panic reasons can be distinguished.
BUG=chrome-os-partner:36744
TEST=Manual on samus_pd. Run 'crash divzero' then 'panicinfo' after
reboot. Verify that panic info is printed with "r4 :dead6660". Trigger
stack overflow, verify that panic info is printed with "r4 :dead6661".
BRANCH=Samus
Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org>
Change-Id: I5f7a8eb0a5c2ac5799d29bb241deb24fabf38f68
Reviewed-on: https://chromium-review.googlesource.com/249912
Tested-by: Alec Berg <alecaberg@chromium.org>
Reviewed-by: Alec Berg <alecaberg@chromium.org>
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These are needed for fixed-point math calculations.
Taken from the same public repo where we got the 32-bit divide
routines for Cortex-M0. With minor modifications to match changes
we've made so far for the existing divide routines (put each function
in its own section, delete dead code, etc.)
BUG=chrome-os-partner:36126
BRANCH=minnie
TEST=hack in a debug console command to allow arbitrary int64 divide, see that
it works as expected
Change-Id: I987dbca7c806c71bc38fa816971ac3a54c1641a5
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/244501
Reviewed-by: Alec Berg <alecaberg@chromium.org>
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