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kernel/linux-imx6_3.14.28/arch/powerpc/math-emu/fsel.c 748 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>
  #include <math-emu/double.h>
  
  int
  fsel(u32 *frD, void *frA, u32 *frB, u32 *frC)
  {
  	FP_DECL_D(A);
  	FP_DECL_EX;
  
  #ifdef DEBUG
  	printk("%s: %p %p %p %p
  ", __func__, frD, frA, frB, frC);
  #endif
  
  	FP_UNPACK_DP(A, frA);
  
  #ifdef DEBUG
  	printk("A: %ld %lu %lu %ld (%ld)
  ", A_s, A_f1, A_f0, A_e, A_c);
  	printk("B: %08x %08x
  ", frB[0], frB[1]);
  	printk("C: %08x %08x
  ", frC[0], frC[1]);
  #endif
  
  	if (A_c == FP_CLS_NAN || (A_c != FP_CLS_ZERO && A_s)) {
  		frD[0] = frB[0];
  		frD[1] = frB[1];
  	} else {
  		frD[0] = frC[0];
  		frD[1] = frC[1];
  	}
  
  #ifdef DEBUG
  	printk("D: %08x.%08x
  ", frD[0], frD[1]);
  #endif
  
  	return 0;
  }