49 lines
1.3 KiB
ArmAsm
49 lines
1.3 KiB
ArmAsm
/* Integer multiplication routines for RISC-V.
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Copyright (C) 2016-2018 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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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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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 "riscv-asm.h"
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.text
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.align 2
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#if __riscv_xlen == 32
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/* Our RV64 64-bit routine is equivalent to our RV32 32-bit routine. */
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# define __muldi3 __mulsi3
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#endif
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FUNC_BEGIN (__muldi3)
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mv a2, a0
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li a0, 0
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.L1:
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andi a3, a1, 1
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beqz a3, .L2
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add a0, a0, a2
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.L2:
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srli a1, a1, 1
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slli a2, a2, 1
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bnez a1, .L1
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ret
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FUNC_END (__muldi3)
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