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kernel/linux-imx6_3.14.28/arch/blackfin/lib/umodsi3.S 1.21 KB
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  /*
   * libgcc1 routines for Blackfin 5xx
   *
   * Copyright 2004-2009 Analog Devices Inc.
   *
   * Licensed under the Clear BSD license or the GPL-2 (or later)
   */
  
  #ifdef CONFIG_ARITHMETIC_OPS_L1
  .section .l1.text
  #else
  .text
  #endif
  
  .extern ___udivsi3;
  .type ___udivsi3, STT_FUNC;
  .globl	___umodsi3
  .type ___umodsi3, STT_FUNC;
  ___umodsi3:
  
  	CC=R0==0;
  	IF CC JUMP .LRETURN_R0;		/* Return 0, if NR == 0 */
  	CC= R1==0;
  	IF CC JUMP .LRETURN_ZERO_VAL;	/* Return 0, if DR == 0 */
  	CC=R0==R1;
  	IF CC JUMP .LRETURN_ZERO_VAL;	/* Return 0, if NR == DR */
  	CC = R1 == 1;
  	IF CC JUMP .LRETURN_ZERO_VAL;	/* Return 0, if  DR == 1 */
  	CC = R0<R1 (IU);
  	IF CC JUMP .LRETURN_R0;		/* Return dividend (R0),IF NR<DR */
  
  	[--SP] = (R7:6);		/* Push registers and */
  	[--SP] = RETS;			/* Return address */
  	R7 = R0;			/* Copy of R0 */
  	R6 = R1;
  	SP += -12;			/* Should always provide this space */
  	CALL ___udivsi3;		/* Compute unsigned quotient using ___udiv32()*/
  	SP += 12;
  	R0 *= R6;			/* Quotient * divisor */
  	R0 = R7 - R0;			/* Dividend - (quotient * divisor) */
  	RETS = [SP++];			/* Pop return address */
  	( R7:6) = [SP++];		/* And registers */
  	RTS;				/* Return remainder */
  .LRETURN_ZERO_VAL:
  	R0 = 0;
  .LRETURN_R0:
  	RTS;
  
  .size ___umodsi3, .-___umodsi3