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04277e02 | 1 | /* Copyright (C) 2004-2019 Free Software Foundation, Inc. |
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2 | Contributed by Richard Henderson <rth@twiddle.net> |
3 | This file is part of the GNU C Library. | |
a424e418 | 4 | |
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5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
ab84e3ff | 16 | License along with the GNU C Library. If not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
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18 | |
19 | #include "div_libc.h" | |
20 | ||
21 | /* 32-bit signed int remainder. This is not a normal C function. Argument | |
22 | registers are t10 and t11, the result goes in t12. Only t12 and AT may | |
23 | be clobbered. | |
24 | ||
25 | The FPU can handle the division for all input values except zero. | |
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26 | All we have to do is compute the remainder via multiply-and-subtract. |
27 | ||
28 | The FPCR save/restore is due to the fact that the EV6 _will_ set FPCR_INE | |
29 | for cvttq/c even without /sui being set. It will not, however, properly | |
30 | raise the exception, so we don't have to worry about FPCR_INED being clear | |
31 | and so dying by SIGFPE. */ | |
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32 | |
33 | #ifndef EXTEND | |
34 | #define EXTEND(S,D) sextl S, D | |
35 | #endif | |
36 | ||
37 | .text | |
38 | .align 4 | |
39 | .globl __reml | |
685896ef | 40 | .type __reml, @funcnoplt |
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41 | .usepv __reml, no |
42 | ||
43 | cfi_startproc | |
44 | cfi_return_column (RA) | |
45 | __reml: | |
46 | lda sp, -FRAME(sp) | |
47 | cfi_def_cfa_offset (FRAME) | |
48 | CALL_MCOUNT | |
49 | stt $f0, 0(sp) | |
a61c91b0 | 50 | excb |
08e3c578 | 51 | beq Y, DIVBYZERO |
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52 | |
53 | stt $f1, 8(sp) | |
54 | stt $f2, 16(sp) | |
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55 | cfi_rel_offset ($f0, 0) |
56 | cfi_rel_offset ($f1, 8) | |
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57 | cfi_rel_offset ($f2, 16) |
58 | mf_fpcr $f2 | |
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59 | |
60 | EXTEND (X, RV) | |
61 | EXTEND (Y, AT) | |
a61c91b0 | 62 | _ITOFT2 RV, $f0, 24, AT, $f1, 32 |
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63 | cvtqt $f0, $f0 |
64 | cvtqt $f1, $f1 | |
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65 | divt/c $f0, $f1, $f0 |
66 | cvttq/c $f0, $f0 | |
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67 | excb |
68 | mt_fpcr $f2 | |
69 | _FTOIT $f0, RV, 24 | |
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70 | |
71 | ldt $f0, 0(sp) | |
72 | mull RV, Y, RV | |
73 | ldt $f1, 8(sp) | |
a61c91b0 | 74 | ldt $f2, 16(sp) |
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75 | lda sp, FRAME(sp) |
76 | cfi_restore ($f0) | |
77 | cfi_restore ($f1) | |
a61c91b0 | 78 | cfi_restore ($f2) |
08e3c578 | 79 | cfi_def_cfa_offset (0) |
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80 | subl X, RV, RV |
81 | ret $31, (RA), 1 | |
82 | ||
83 | cfi_endproc | |
84 | .size __reml, .-__reml | |
85 | ||
86 | DO_DIVBYZERO |