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

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