diff options
Diffstat (limited to 'ports/sysdeps/mips/fpu_control.h')
| -rw-r--r-- | ports/sysdeps/mips/fpu_control.h | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/ports/sysdeps/mips/fpu_control.h b/ports/sysdeps/mips/fpu_control.h index 770cbb31d8..40469627a7 100644 --- a/ports/sysdeps/mips/fpu_control.h +++ b/ports/sysdeps/mips/fpu_control.h @@ -29,7 +29,9 @@ * available for MIPS III and newer. * 23 -> Condition bit * 22-21 -> reserved for architecture implementers - * 20-18 -> reserved (read as 0, write with 0) + * 20 -> reserved (read as 0, write with 0) + * 19 -> IEEE 754-2008 non-arithmetic ABS.fmt and NEG.fmt enable + * 18 -> IEEE 754-2008 recommended NaN encoding enable * 17 -> cause bit for unimplemented operation * 16 -> cause bit for invalid exception * 15 -> cause bit for division by zero exception @@ -79,22 +81,33 @@ extern fpu_control_t __fpu_control; /* flush denormalized numbers to zero */ #define _FPU_FLUSH_TZ 0x1000000 +/* IEEE 754-2008 compliance control. */ +#define _FPU_ABS2008 0x80000 +#define _FPU_NAN2008 0x40000 + /* rounding control */ #define _FPU_RC_NEAREST 0x0 /* RECOMMENDED */ #define _FPU_RC_ZERO 0x1 #define _FPU_RC_UP 0x2 #define _FPU_RC_DOWN 0x3 -#define _FPU_RESERVED 0xfe9c0000 /* Reserved bits in cw */ +#define _FPU_RESERVED 0xfe840000 /* Reserved bits in cw, incl NAN2008. */ /* The fdlibm code requires strict IEEE double precision arithmetic, and no interrupts for exceptions, rounding to nearest. */ +#ifdef __mips_nan2008 +# define _FPU_DEFAULT 0x00040000 +#else +# define _FPU_DEFAULT 0x00000000 +#endif -#define _FPU_DEFAULT 0x00000000 - -/* IEEE: same as above, but exceptions */ -#define _FPU_IEEE 0x00000F80 +/* IEEE: same as above, but exceptions. */ +#ifdef __mips_nan2008 +# define _FPU_IEEE 0x00040F80 +#else +# define _FPU_IEEE 0x00000F80 +#endif /* Type of the control word. */ typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__))); |