diff options
Diffstat (limited to 'sysdeps/hppa/fpu/fpu_control.h')
| -rw-r--r-- | sysdeps/hppa/fpu/fpu_control.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/sysdeps/hppa/fpu/fpu_control.h b/sysdeps/hppa/fpu/fpu_control.h index ba9692fe63..2087928496 100644 --- a/sysdeps/hppa/fpu/fpu_control.h +++ b/sysdeps/hppa/fpu/fpu_control.h @@ -19,7 +19,7 @@ #ifndef _FPU_CONTROL_H #define _FPU_CONTROL_H -/* Masking of interrupts */ +/* Masking of interrupts. */ #define _FPU_MASK_PM 0x00000001 /* Inexact (I) */ #define _FPU_MASK_UM 0x00000002 /* Underflow (U) */ #define _FPU_MASK_OM 0x00000004 /* Overflow (O) */ @@ -30,6 +30,8 @@ #define _FPU_HPPA_MASK_RM 0x00000600 /* Rounding mode mask */ /* Masking of interrupt enable bits. */ #define _FPU_HPPA_MASK_INT 0x0000001f /* Interrupt mask */ +/* Shift by 27 to install flag bits. */ +#define _FPU_HPPA_SHIFT_FLAGS 27 /* There are no reserved bits in the PA fpsr (though some are undefined). */ #define _FPU_RESERVED 0x00000000 @@ -55,6 +57,9 @@ typedef unsigned int fpu_control_t; #define _FPU_SETCW(cw) \ ({ \ union { __extension__ unsigned long long __fpreg; unsigned int __halfreg[2]; } __fullfp; \ + /* Get the current status word and set the control word. */ \ + __asm__ ("fstd %%fr0,0(%1)\n\t" \ + : "=m" (__fullfp.__fpreg) : "r" (&__fullfp.__fpreg) : "%r0"); \ __fullfp.__halfreg[0] = cw; \ __asm__ ("fldd 0(%1),%%fr0\n\t" \ : : "m" (__fullfp.__fpreg), "r" (&__fullfp.__fpreg) : "%r0" ); \ |