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kernel/linux-imx6_3.14.28/arch/powerpc/math-emu/mcrfs.c 582 Bytes
6b13f685e   김민수   BSP 최초 추가
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  #include <linux/types.h>
  #include <linux/errno.h>
  #include <asm/uaccess.h>
  
  #include <asm/sfp-machine.h>
  #include <math-emu/soft-fp.h>
  
  int
  mcrfs(u32 *ccr, u32 crfD, u32 crfS)
  {
  	u32 value, clear;
  
  #ifdef DEBUG
  	printk("%s: %p (%08x) %d %d
  ", __func__, ccr, *ccr, crfD, crfS);
  #endif
  
  	clear = 15 << ((7 - crfS) << 2);
  	if (!crfS)
  		clear = 0x90000000;
  
  	value = (__FPU_FPSCR >> ((7 - crfS) << 2)) & 15;
  	__FPU_FPSCR &= ~(clear);
  
  	*ccr &= ~(15 << ((7 - crfD) << 2));
  	*ccr |= (value << ((7 - crfD) << 2));
  
  #ifdef DEBUG
  	printk("CR: %08x
  ", __func__, *ccr);
  #endif
  
  	return 0;
  }