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; Copyright (C) 2017-2020 Free Software Foundation, Inc.
; Contributed by Sebastian Perta.
;
; This file is free software; you can redistribute it and/or modify it
; under the terms of the GNU General Public License as published by the
; Free Software Foundation; either version 3, or (at your option) any
; later version.
;
; This file is distributed in the hope that it will be useful, but
; WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
; General Public License for more details.
;
; Under Section 7 of GPL version 3, you are granted additional
; permissions described in the GCC Runtime Library Exception, version
; 3.1, as published by the Free Software Foundation.
;
; You should have received a copy of the GNU General Public License and
; a copy of the GCC Runtime Library Exception along with this program;
; see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
; <http://www.gnu.org/licenses/>.
#include "vregs.h"
.text
START_FUNC ___umaxdi3
; copy first argument/operand to the output registers
movw ax, [sp+4]
movw r8, ax
movw ax, [sp+6]
movw r10, ax
movw ax, [sp+8]
movw r12, ax
movw ax, [sp+10]
movw r14, ax
; use 16-bit compares from the most significant words downto the least significant ones
movw ax, [sp+18]
cmpw ax, r14
bh $.L1
bnz $.L2
movw ax, [sp+16]
cmpw ax, r12
bh $.L1
bnz $.L2
movw ax, [sp+14]
cmpw ax, r10
bh $.L1
bnz $.L2
movw ax, [sp+12]
cmpw ax, r8
bh $.L1
ret
.L1:
; copy second argument/operand to the output registers
movw ax, [sp+12]
movw r8, ax
movw ax, [sp+14]
movw r10, ax
movw ax, [sp+16]
movw r12, ax
movw ax, [sp+18]
movw r14, ax
.L2:
ret
END_FUNC ___umaxdi3
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