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/* SPDX-License-Identifier: GPL-2.0-or-later */
/**
* Adopted for the Linux kernel from IPXE project, see
* https://github.com/ipxe/ipxe/blob/master/src/arch/riscv32/libgcc/llshift.S
*/
#include <linux/linkage.h>
#include <asm/asm.h>
/**
* Arithmetic shift right
*
* @v a1:a0 Value to shift
* @v a2 Shift amount
* @ret a1:a0 Shifted value
*/
SYM_FUNC_START(__ashrdi3)
/* Perform shift by 32 bits, if applicable */
li t0, 32
sub t1, t0, a2
bgtz t1, 1f
mv a0, a1
srai a1, a1, 31
1: /* Perform shift by modulo-32 bits, if applicable */
andi a2, a2, 0x1f
beqz a2, 2f
sll t2, a1, t1
sra a1, a1, a2
srl a0, a0, a2
or a0, a0, t2
2: ret
SYM_FUNC_END(__ashrdi3)
EXPORT_SYMBOL(__ashrdi3)
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