mirror of
https://github.com/torvalds/linux.git
synced 2024-11-22 03:59:00 +00:00
338d915090
Move assembly source prototypes from xtensa_ksyms.c to asm/asm-prototypes.h, move corresponding EXPORT_SYMBOLs to the assembly sources and enable HAVE_ASM_MODVERSIONS for xtensa. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
59 lines
1.3 KiB
ArmAsm
59 lines
1.3 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
|
|
#include <linux/linkage.h>
|
|
#include <asm/asmmacro.h>
|
|
#include <asm/core.h>
|
|
|
|
ENTRY(__umodsi3)
|
|
|
|
abi_entry_default
|
|
#if XCHAL_HAVE_DIV32
|
|
remu a2, a2, a3
|
|
#else
|
|
bltui a3, 2, .Lle_one /* check if the divisor is <= 1 */
|
|
|
|
do_nsau a5, a2, a6, a7 /* dividend_shift = nsau (dividend) */
|
|
do_nsau a4, a3, a6, a7 /* divisor_shift = nsau (divisor) */
|
|
bgeu a5, a4, .Lspecial
|
|
|
|
sub a4, a4, a5 /* count = divisor_shift - dividend_shift */
|
|
ssl a4
|
|
sll a3, a3 /* divisor <<= count */
|
|
|
|
/* test-subtract-and-shift loop */
|
|
#if XCHAL_HAVE_LOOPS
|
|
loopnez a4, .Lloopend
|
|
#endif /* XCHAL_HAVE_LOOPS */
|
|
.Lloop:
|
|
bltu a2, a3, .Lzerobit
|
|
sub a2, a2, a3
|
|
.Lzerobit:
|
|
srli a3, a3, 1
|
|
#if !XCHAL_HAVE_LOOPS
|
|
addi a4, a4, -1
|
|
bnez a4, .Lloop
|
|
#endif /* !XCHAL_HAVE_LOOPS */
|
|
.Lloopend:
|
|
|
|
.Lspecial:
|
|
bltu a2, a3, .Lreturn
|
|
sub a2, a2, a3 /* subtract once more if dividend >= divisor */
|
|
.Lreturn:
|
|
abi_ret_default
|
|
|
|
.Lle_one:
|
|
bnez a3, .Lreturn0
|
|
|
|
/* Divide by zero: Use an illegal instruction to force an exception.
|
|
The subsequent "DIV0" string can be recognized by the exception
|
|
handler to identify the real cause of the exception. */
|
|
ill
|
|
.ascii "DIV0"
|
|
|
|
.Lreturn0:
|
|
movi a2, 0
|
|
#endif /* XCHAL_HAVE_DIV32 */
|
|
abi_ret_default
|
|
|
|
ENDPROC(__umodsi3)
|
|
EXPORT_SYMBOL(__umodsi3)
|