33283d91d9
DBNZ instruction was moved from BRANCH class to a separate one - DBNZ.
Thus, it must be processed separately in arc_insn_get_branch_target
to correctly determine an offset for a possible branch.
The testsuite for DBNZ instruction verifies these cases:
1. Check that dbnz does not branch and falls through if its source
register is 0 after decrementing. GDB must successfully break
on the following instruction after stepping over.
2. Check that dbnz branches to the target correctly if its source register
is not 0 after decrementing - GDB must successfully break on the target
instruction if a forward branch is performed after stepping over.
3. The same as point 2 but for a backward branching case.
Signed-off-by: Yuriy Kolerov <kolerov93@gmail.com>
47 lines
1.2 KiB
ArmAsm
47 lines
1.2 KiB
ArmAsm
; This testcase is part of GDB, the GNU debugger.
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; Copyright 2024 Free Software Foundation, Inc.
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; This program is free software; you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation; either version 3 of the License, or
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; (at your option) any later version.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program. If not, see <http://www.gnu.org/licenses/>.
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.section .text
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.align 4
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.global main
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.type main, @function
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main:
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mov r0,1
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dbnz1:
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; r0 == 0 after decrementing. dbnz doesn't do branch.
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dbnz r0,@end
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mov r0,5
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dbnz2:
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; r0 == 3 after decrementing and delay slot. dbnz does branch.
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dbnz.d r0,@dbnz3
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sub r0,r0,1
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dbnz4:
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; r0 == 1 after decrementing. dbnz does branch.
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dbnz r0,@end
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dbnz3:
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; r0 == 2 after decrementing. dbnz does branch.
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dbnz r0,@dbnz4
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end:
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mov r0,0
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j [blink]
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.section .note.GNU-stack,"",@progbits
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