diff options
Diffstat (limited to 'libc/sysdeps/linux/arm/fpu_control.h')
| -rw-r--r-- | libc/sysdeps/linux/arm/fpu_control.h | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/arm/fpu_control.h b/libc/sysdeps/linux/arm/fpu_control.h index 8c13ca3a3..31d81ea29 100644 --- a/libc/sysdeps/linux/arm/fpu_control.h +++ b/libc/sysdeps/linux/arm/fpu_control.h @@ -20,7 +20,34 @@ #ifndef _FPU_CONTROL_H #define _FPU_CONTROL_H -#ifdef __MAVERICK__ +#ifdef __VFP_FP__ + +/* masking of interrupts */ +#define _FPU_MASK_IM 0x00000100 /* invalid operation */ +#define _FPU_MASK_ZM 0x00000200 /* divide by zero */ +#define _FPU_MASK_OM 0x00000400 /* overflow */ +#define _FPU_MASK_UM 0x00000800 /* underflow */ +#define _FPU_MASK_PM 0x00001000 /* inexact */ + +/* Some bits in the FPSCR are not yet defined. They must be preserved when + modifying the contents. */ +#define _FPU_RESERVED 0x0e08e0e0 +#define _FPU_DEFAULT 0x00000000 +/* Default + exceptions enabled. */ +#define _FPU_IEEE (_FPU_DEFAULT | 0x00001f00) + +/* Type of the control word. */ +typedef unsigned int fpu_control_t; + +/* Macros for accessing the hardware control word. */ +/* This is fmrx %0, fpscr. */ +#define _FPU_GETCW(cw) \ + __asm__ __volatile__ ("mrc p10, 7, %0, cr1, cr0, 0" : "=r" (cw)) +/* This is fmxr fpscr, %0. */ +#define _FPU_SETCW(cw) \ + __asm__ __volatile__ ("mcr p10, 7, %0, cr1, cr0, 0" : : "r" (cw)) + +#elif defined __MAVERICK__ /* DSPSC register: (from EP9312 User's Guide) * |