diff options
| author | Hau Hsu <hau.hsu@sifive.com> | 2023-02-22 09:59:07 +0800 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2023-02-22 12:20:57 +0100 |
| commit | 97d483c2f81c0865bead701f4d2824a21fae4938 (patch) | |
| tree | f81be16d1f533bde2a1bc0d7116ebe8175d01005 /newlib/libc | |
| parent | 2229f42400b992669a99cba9b42b600b0ba01b7f (diff) | |
| download | newlib-97d483c2f81c0865bead701f4d2824a21fae4938.zip newlib-97d483c2f81c0865bead701f4d2824a21fae4938.tar.gz newlib-97d483c2f81c0865bead701f4d2824a21fae4938.tar.bz2 | |
RISC-V: Use the new libm code if possible
Set __OBSOLETE_MATH_DEFAULT to 0 if 'd' extension is supported (i.e.
__riscv_flen == 64).
Base on the comment for __OBSOLETE_MATH_DEFAULT:
> ... it assumes that the toolchain has ISO C99 support (hexfloat
> literals, standard fenv semantics), the target has IEEE-754 conforming
> binary32 float and binary64 double (not mixed endian) representation,
> standard SNaN representation, double and single precision arithmetics
> has similar latency and it has no legacy SVID matherr support, only
> POSIX errno and fenv exception based error handling.
Signed-off-by: Hau Hsu <hau.hsu@sifive.com>
Diffstat (limited to 'newlib/libc')
| -rw-r--r-- | newlib/libc/include/machine/ieeefp.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/newlib/libc/include/machine/ieeefp.h b/newlib/libc/include/machine/ieeefp.h index 9bb8af0..a29557a 100644 --- a/newlib/libc/include/machine/ieeefp.h +++ b/newlib/libc/include/machine/ieeefp.h @@ -221,6 +221,11 @@ #ifdef __riscv_flen # define _SUPPORTS_ERREXCEPT #endif +#if __riscv_flen == 64 +# define __OBSOLETE_MATH_DEFAULT 0 +#else +# define __OBSOLETE_MATH_DEFAULT 1 +#endif #endif #ifdef __i960__ |