musl/arch/riscv64/bits/fenv.h
Rich Felker 0a48860c27 add riscv64 architecture support
Author: Alex Suykov <alex.suykov@gmail.com>
Author: Aric Belsito <lluixhi@gmail.com>
Author: Drew DeVault <sir@cmpwn.com>
Author: Michael Clark <mjc@sifive.com>
Author: Michael Forney <mforney@mforney.org>
Author: Stefan O'Rear <sorear2@gmail.com>

This port has involved the work of many people over several years. I
have tried to ensure that everyone with substantial contributions has
been credited above; if any omissions are found they will be noted
later in an update to the authors/contributors list in the COPYRIGHT
file.

The version committed here comes from the riscv/riscv-musl repo's
commit 3fe7e2c75df78eef42dcdc352a55757729f451e2, with minor changes by
me for issues found during final review:

- a_ll/a_sc atomics are removed (according to the ISA spec, lr/sc
  are not safe to use in separate inline asm fragments)

- a_cas[_p] is fixed to be a memory barrier

- the call from the _start assembly into the C part of crt1/ldso is
  changed to allow for the possibility that the linker does not place
  them nearby each other.

- DTP_OFFSET is defined correctly so that local-dynamic TLS works

- reloc.h LDSO_ARCH logic is simplified and made explicit.

- unused, non-functional crti/n asm files are removed.

- an empty .sdata section is added to crt1 so that the
  __global_pointer reference is resolvable.

- indentation style errors in some asm files are fixed.
2019-06-14 17:13:05 -04:00

18 lines
373 B
C

#define FE_INVALID 16
#define FE_DIVBYZERO 8
#define FE_OVERFLOW 4
#define FE_UNDERFLOW 2
#define FE_INEXACT 1
#define FE_ALL_EXCEPT 31
#define FE_TONEAREST 0
#define FE_DOWNWARD 2
#define FE_UPWARD 3
#define FE_TOWARDZERO 1
typedef unsigned int fexcept_t;
typedef unsigned int fenv_t;
#define FE_DFL_ENV ((const fenv_t *) -1)