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-/*
- * File: arch/blackfin/lib/modsi3.S
- * Based on:
- * Author:
- *
- * Created:
- * Description: This program computes 32 bit signed remainder. It calls div32 function
- * for quotient estimation.
- *
- * Registers used :
- * Numerator/ Denominator in R0, R1
- * R0 - returns remainder.
- * R2-R7
- *
- * Rev: $Id: modsi3.S 2775 2007-02-21 13:58:44Z hennerich $
- *
- * Modified:
- * Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs: Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-.global ___modsi3;
-.type ___modsi3, STT_FUNC;
-.extern ___divsi3;
-.type ___divsi3, STT_FUNC;
-
-#ifdef CONFIG_ARITHMETIC_OPS_L1
-.section .l1.text
-#else
-.text
-#endif
-
-___modsi3:
-
- CC=R0==0;
- IF CC JUMP .LRETURN_R0; /* Return 0, if numerator == 0 */
- CC=R1==0;
- IF CC JUMP .LRETURN_ZERO; /* Return 0, if denominator == 0 */
- CC=R0==R1;
- IF CC JUMP .LRETURN_ZERO; /* Return 0, if numerator == denominator */
- CC = R1 == 1;
- IF CC JUMP .LRETURN_ZERO; /* Return 0, if denominator == 1 */
- CC = R1 == -1;
- IF CC JUMP .LRETURN_ZERO; /* Return 0, if denominator == -1 */
-
- /* Valid input. Use __divsi3() to compute the quotient, and then
- * derive the remainder from that. */
-
- [--SP] = (R7:6); /* Push R7 and R6 */
- [--SP] = RETS; /* and return address */
- R7 = R0; /* Copy of R0 */
- R6 = R1; /* Save for later */
- SP += -12; /* Should always provide this space */
- CALL ___divsi3; /* Compute signed quotient using ___divsi3()*/
- SP += 12;
- R0 *= R6; /* Quotient * divisor */
- R0 = R7 - R0; /* Dividend - (quotient * divisor) */
- RETS = [SP++]; /* Get back return address */
- (R7:6) = [SP++]; /* Pop registers R7 and R4 */
- RTS; /* Store remainder */
-
-.LRETURN_ZERO:
- R0 = 0;
-.LRETURN_R0:
- RTS;