LXR linux/arch/sparc/include/asm/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
  13struct fpustate {
  14        u32     regs[64];
  15};
  16
  17#define FPUSTATE (struct fpustate *)(current_thread_info()->fpregs)
  18
  19static 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
  28static inline void fprs_write(unsigned long val)
  29{
  30        __asm__ __volatile__("wr %0, 0x0, %%fprs" : : "r" (val));
  31}
  32
  33#endif /* !(_SPARC64_FPUMACRO_H) */
  34