include/asm-sparc64/fpumacro.h

   1 /* fpumacro.h: FPU related macros.
   2  *
   3  * Copyright (C) 1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   4  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   5  */
   6
   7 #ifndef _SPARC64_FPUMACRO_H
   8 #define _SPARC64_FPUMACRO_H
   9
  10 #include <asm/asi.h>
  11 #include <asm/visasm.h>
  12
  13 struct fpustate {
  14         u32     regs[64];
  15 };
  16
  17 #define FPUSTATE (struct fpustate *)(((unsigned long)current) + AOFF_task_fpregs)
  18
  19 extern __inline__ unsigned long fprs_read(void)
  20 {
  21         unsigned long retval;
  22
  23         __asm__ __volatile__("rd %%fprs, %0" : "=r" (retval));
  24
  25         return retval;
  26 }
  27
  28 extern __inline__ void fprs_write(unsigned long val)
  29 {
  30         __asm__ __volatile__("wr %0, 0x0, %%fprs" : : "r" (val));
  31 }
  32
  33 #endif /* !(_SPARC64_FPUMACRO_H) */