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| author | Maciej W. Rozycki <macro@embecosm.com> | 2023-01-27 08:53:35 +0000 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2023-01-27 14:25:44 +0100 |
| commit | 963d6c79ead3941b399e3549bc753c2cb90ab79b (patch) | |
| tree | ad13d62f4214638a56553654955df65eca6c95a1 /newlib | |
| parent | 28594480df73bbed642b4471445fa106ee387730 (diff) | |
| download | newlib-963d6c79ead3941b399e3549bc753c2cb90ab79b.zip newlib-963d6c79ead3941b399e3549bc753c2cb90ab79b.tar.gz newlib-963d6c79ead3941b399e3549bc753c2cb90ab79b.tar.bz2 | |
RISC-V: Fix floating-point environment support for soft float
We don't have floating-point exception or non-default rounding mode
support for the RISC-V soft-float environment, `feraiseexcept' and
`fesetround' do nothing unless the `__riscv_flen' macro has been set.
Therefore following ISO C language requirements[1] only define macros
for soft float that correspond to actually supported floating-point
environment features, removing failures from GCC testing such as:
FAIL: gcc.dg/torture/fp-int-convert-timode-3.c -O0 execution test
FAIL: gcc.dg/torture/fp-int-convert-timode-4.c -O0 execution test
References:
[1] "Programming languages -- C", ISO/IEC 9899:2023, working draft --
September 3, 2022, Section 7.6 "Floating-point environment <fenv.h>"
Fixes: 7040b2de0883 ("Add RISC-V port for libm")
Signed-off-by: Maciej W. Rozycki <macro@embecosm.com>
Diffstat (limited to 'newlib')
| -rw-r--r-- | newlib/libc/machine/riscv/sys/fenv.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/newlib/libc/machine/riscv/sys/fenv.h b/newlib/libc/machine/riscv/sys/fenv.h index 6cbd321..772f383 100644 --- a/newlib/libc/machine/riscv/sys/fenv.h +++ b/newlib/libc/machine/riscv/sys/fenv.h @@ -14,6 +14,8 @@ #include <stddef.h> +#if __riscv_flen + /* Per "The RISC-V Instruction Set Manual: Volume I: User-Level ISA: * Version 2.1", Section 8.2, "Floating-Point Control and Status * Register": @@ -69,6 +71,13 @@ * floating-point unit." */ +#else /* !__riscv_flen */ + +#define FE_ALL_EXCEPT 0x00000000 +#define FE_TONEAREST 0x00000000 + +#endif /* !__riscv_flen */ + typedef size_t fenv_t; typedef size_t fexcept_t; extern const fenv_t fe_dfl_env; |