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: 7040b2de08
("Add RISC-V port for libm")
Signed-off-by: Maciej W. Rozycki <macro@embecosm.com>
This commit is contained in:
parent
28594480df
commit
963d6c79ea
|
@ -14,6 +14,8 @@
|
||||||
|
|
||||||
#include <stddef.h>
|
#include <stddef.h>
|
||||||
|
|
||||||
|
#if __riscv_flen
|
||||||
|
|
||||||
/* Per "The RISC-V Instruction Set Manual: Volume I: User-Level ISA:
|
/* Per "The RISC-V Instruction Set Manual: Volume I: User-Level ISA:
|
||||||
* Version 2.1", Section 8.2, "Floating-Point Control and Status
|
* Version 2.1", Section 8.2, "Floating-Point Control and Status
|
||||||
* Register":
|
* Register":
|
||||||
|
@ -69,6 +71,13 @@
|
||||||
* floating-point unit."
|
* 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 fenv_t;
|
||||||
typedef size_t fexcept_t;
|
typedef size_t fexcept_t;
|
||||||
extern const fenv_t fe_dfl_env;
|
extern const fenv_t fe_dfl_env;
|
||||||
|
|
Loading…
Reference in New Issue