1 /* SPDX-License-Identifier: GPL-2.0-or-later W
2 #include <linux/linkage.h>
3 #include <asm/asmmacro.h>
4 #include <asm/core.h>
5
6 ENTRY(__umodsi3)
7
8 abi_entry_default
9 #if XCHAL_HAVE_DIV32
10 remu a2, a2, a3
11 #else
12 bltui a3, 2, .Lle_one /* check if th
13
14 do_nsau a5, a2, a6, a7 /* dividend_sh
15 do_nsau a4, a3, a6, a7 /* divisor_shi
16 bgeu a5, a4, .Lspecial
17
18 sub a4, a4, a5 /* count = div
19 ssl a4
20 sll a3, a3 /* divisor <<=
21
22 /* test-subtract-and-shift loop */
23 #if XCHAL_HAVE_LOOPS
24 loopnez a4, .Lloopend
25 #endif /* XCHAL_HAVE_LOOPS */
26 .Lloop:
27 bltu a2, a3, .Lzerobit
28 sub a2, a2, a3
29 .Lzerobit:
30 srli a3, a3, 1
31 #if !XCHAL_HAVE_LOOPS
32 addi a4, a4, -1
33 bnez a4, .Lloop
34 #endif /* !XCHAL_HAVE_LOOPS */
35 .Lloopend:
36
37 .Lspecial:
38 bltu a2, a3, .Lreturn
39 sub a2, a2, a3 /* subtract on
40 .Lreturn:
41 abi_ret_default
42
43 .Lle_one:
44 bnez a3, .Lreturn0
45
46 /* Divide by zero: Use an illegal inst
47 The subsequent "DIV0" string can be
48 handler to identify the real cause
49 ill
50 .ascii "DIV0"
51
52 .Lreturn0:
53 movi a2, 0
54 #endif /* XCHAL_HAVE_DIV32 */
55 abi_ret_default
56
57 ENDPROC(__umodsi3)
58 EXPORT_SYMBOL(__umodsi3)
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.