[coreboot-gerrit] New patch to review for coreboot: arm: add __umoddi3() to libgcc implementation
Stefan Reinauer (stefan.reinauer@coreboot.org)
gerrit at coreboot.org
Thu Jul 9 00:00:14 CEST 2015
Stefan Reinauer (stefan.reinauer at 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 at 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 at 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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