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arm: add __umoddi3() to libgcc implementation 

Change-Id: Ida01506406d1d74211f0155a84c2b25dbaac5f1c
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/10860
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
This commit is contained in:
Stefan Reinauer 2015-07-08 23:59:15 +02:00
parent a3f1a2e2bf
commit db03c2259a
4 changed files with 99 additions and 0 deletions
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1
src/arch/arm/libgcc/Makefile.inc
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@ -20,6 +20,7 @@
################################################################################
libgcc_files = ashldi3.S lib1funcs.S lshrdi3.S muldi3.S ucmpdi2.S uldivmod.S
libgcc_files += udivmoddi4.c umoddi3.c
ifeq ($(CONFIG_ARCH_BOOTBLOCK_ARM),y)
bootblock-y += $(libgcc_files)

26
src/arch/arm/libgcc/libgcc.h Normal file
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@ -0,0 +1,26 @@
/*
* This file is part of the coreboot project.
*
* 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; version 2 of the License.
*
* 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, write to the Free Software
* Foundation, Inc.
*/
#ifndef __ARCH_ARM_LIBGCC_LIBGCC_H__
#define __ARCH_ARM_LIBGCC_LIBGCC_H__
#include <stdint.h>
uint64_t __umoddi3(uint64_t num, uint64_t den);
uint64_t __udivmoddi4(uint64_t num, uint64_t den, uint64_t *rem);
#endif

48
src/arch/arm/libgcc/udivmoddi4.c Normal file
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@ -0,0 +1,48 @@
/*
* This file is part of the coreboot project.
*
* 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; version 2 of the License.
*
* 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, write to the Free Software
* Foundation, Inc.
*/
#include "libgcc.h"
uint64_t __udivmoddi4(uint64_t num, uint64_t den, uint64_t *rem_p)
{
uint64_t quot = 0, qbit = 1;
if (den == 0) {
return 1 / ((unsigned)den); /* Intentional divide by zero, without
triggering a compiler warning which
would abort the build */
}
/* Left-justify denominator and count shift */
while ((int64_t)den >= 0) {
den <<= 1;
qbit <<= 1;
}
while (qbit) {
if (den <= num) {
num -= den;
quot += qbit;
}
den >>= 1;
qbit >>= 1;
}
if (rem_p)
*rem_p = num;
return quot;
}

24
src/arch/arm/libgcc/umoddi3.c Normal file
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@ -0,0 +1,24 @@
/*
* This file is part of the coreboot project.
*
* 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; version 2 of the License.
*
* 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, write to the Free Software
* Foundation, Inc.
*/
#include "libgcc.h"
uint64_t __umoddi3(uint64_t num, uint64_t den)
{
uint64_t v;
(void) __udivmoddi4(num, den, &v);
return v;
}