2019-06-02 15:48:37 +00:00
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; Copyright (C) 2017-2019 Free Software Foundation, Inc.
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2018-12-28 15:30:48 +00:00
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; Contributed by Sebastian Perta.
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;
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; This file is free software; you can redistribute it and/or modify it
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; under the terms of the GNU General Public License as published by the
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; Free Software Foundation; either version 3, or (at your option) any
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; later version.
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;
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; This file is distributed in the hope that it will be useful, but
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; WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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; General Public License for more details.
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;
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; Under Section 7 of GPL version 3, you are granted additional
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; permissions described in the GCC Runtime Library Exception, version
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; 3.1, as published by the Free Software Foundation.
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;
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; You should have received a copy of the GNU General Public License and
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; a copy of the GCC Runtime Library Exception along with this program;
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; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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; <http://www.gnu.org/licenses/>.
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#include "vregs.h"
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.text
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START_FUNC ___umaxdi3
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; copy first argument/operand to the output registers
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movw ax, [sp+4]
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movw r8, ax
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movw ax, [sp+6]
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movw r10, ax
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movw ax, [sp+8]
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movw r12, ax
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movw ax, [sp+10]
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movw r14, ax
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; use 16-bit compares from the most significant words downto the least significant ones
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movw ax, [sp+18]
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cmpw ax, r14
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bh $.L1
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bnz $.L2
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movw ax, [sp+16]
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cmpw ax, r12
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bh $.L1
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bnz $.L2
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movw ax, [sp+14]
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cmpw ax, r10
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bh $.L1
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bnz $.L2
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movw ax, [sp+12]
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cmpw ax, r8
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bh $.L1
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ret
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.L1:
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; copy second argument/operand to the output registers
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movw ax, [sp+12]
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movw r8, ax
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movw ax, [sp+14]
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movw r10, ax
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movw ax, [sp+16]
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movw r12, ax
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movw ax, [sp+18]
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movw r14, ax
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.L2:
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ret
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END_FUNC ___umaxdi3
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