1//===-- Implementation of setjmp ------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "src/__support/common.h"
10#include "src/setjmp/setjmp_impl.h"
11
12#include <setjmp.h>
13
14#if !defined(LIBC_TARGET_ARCH_IS_ANY_RISCV)
15#error "Invalid file include"
16#endif
17
18#define STORE_IMPL(insns, reg, val) \
19 LIBC_INLINE_ASM(#insns " " #reg ", %0\n\t" : : "m"(val) :)
20
21#ifdef LIBC_TARGET_ARCH_IS_RISCV32
22#define STORE(reg, val) STORE_IMPL(sw, reg, val)
23#define STORE_FP(reg, val) STORE_IMPL(fsw, reg, val)
24#else
25#define STORE(reg, val) STORE_IMPL(sd, reg, val)
26#define STORE_FP(reg, val) STORE_IMPL(fsd, reg, val)
27#endif
28
29namespace LIBC_NAMESPACE {
30
31LLVM_LIBC_FUNCTION(int, setjmp, (__jmp_buf * buf)) {
32 STORE(ra, buf->__pc);
33 STORE(s0, buf->__regs[0]);
34 STORE(s1, buf->__regs[1]);
35 STORE(s2, buf->__regs[2]);
36 STORE(s3, buf->__regs[3]);
37 STORE(s4, buf->__regs[4]);
38 STORE(s5, buf->__regs[5]);
39 STORE(s6, buf->__regs[6]);
40 STORE(s7, buf->__regs[7]);
41 STORE(s8, buf->__regs[8]);
42 STORE(s9, buf->__regs[9]);
43 STORE(s10, buf->__regs[10]);
44 STORE(s11, buf->__regs[11]);
45 STORE(sp, buf->__sp);
46
47#if __riscv_float_abi_double
48 STORE_FP(fs0, buf->__fpregs[0]);
49 STORE_FP(fs1, buf->__fpregs[1]);
50 STORE_FP(fs2, buf->__fpregs[2]);
51 STORE_FP(fs3, buf->__fpregs[3]);
52 STORE_FP(fs4, buf->__fpregs[4]);
53 STORE_FP(fs5, buf->__fpregs[5]);
54 STORE_FP(fs6, buf->__fpregs[6]);
55 STORE_FP(fs7, buf->__fpregs[7]);
56 STORE_FP(fs8, buf->__fpregs[8]);
57 STORE_FP(fs9, buf->__fpregs[9]);
58 STORE_FP(fs10, buf->__fpregs[10]);
59 STORE_FP(fs11, buf->__fpregs[11]);
60#elif defined(__riscv_float_abi_single)
61#error "setjmp implementation not available for the target architecture."
62#endif
63
64 return 0;
65}
66
67} // namespace LIBC_NAMESPACE
68

source code of libc/src/setjmp/riscv/setjmp.cpp