Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/10860
-gerrit
commit dce8ca34672682cea2f64122ab1192f7d98fb3dd Author: Stefan Reinauer stefan.reinauer@coreboot.org Date: Wed Jul 8 23:59:15 2015 +0200
arm: add __umoddi3() to libgcc implementation
Change-Id: Ida01506406d1d74211f0155a84c2b25dbaac5f1c Signed-off-by: Stefan Reinauer stefan.reinauer@coreboot.org --- src/arch/arm/libgcc/Makefile.inc | 1 + src/arch/arm/libgcc/libgcc.h | 26 ++++++++++++++++++++++ src/arch/arm/libgcc/udivmoddi4.c | 48 ++++++++++++++++++++++++++++++++++++++++ src/arch/arm/libgcc/umoddi3.c | 24 ++++++++++++++++++++ 4 files changed, 99 insertions(+)
diff --git a/src/arch/arm/libgcc/Makefile.inc b/src/arch/arm/libgcc/Makefile.inc index aa2acfe..6724ee6 100644 --- a/src/arch/arm/libgcc/Makefile.inc +++ b/src/arch/arm/libgcc/Makefile.inc @@ -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) diff --git a/src/arch/arm/libgcc/libgcc.h b/src/arch/arm/libgcc/libgcc.h new file mode 100644 index 0000000..afd219c --- /dev/null +++ b/src/arch/arm/libgcc/libgcc.h @@ -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 diff --git a/src/arch/arm/libgcc/udivmoddi4.c b/src/arch/arm/libgcc/udivmoddi4.c new file mode 100644 index 0000000..afc91f4 --- /dev/null +++ b/src/arch/arm/libgcc/udivmoddi4.c @@ -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; +} diff --git a/src/arch/arm/libgcc/umoddi3.c b/src/arch/arm/libgcc/umoddi3.c new file mode 100644 index 0000000..4064427 --- /dev/null +++ b/src/arch/arm/libgcc/umoddi3.c @@ -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; +}
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Stefan Reinauer