mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-20 02:34:23 +08:00
51be24c351
add proper ENDPROC() to close out assembly functions so size/type is set properly in the final ELF image Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
82 lines
2.4 KiB
ArmAsm
82 lines
2.4 KiB
ArmAsm
/*
|
|
* 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
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see the file COPYING, or write
|
|
* to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
.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;
|
|
|
|
.size ___modsi3, .-___modsi3
|