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authorStefan Reinauer <stefan.reinauer@coreboot.org>2015-07-08 23:59:15 +0200
committerStefan Reinauer <stefan.reinauer@coreboot.org>2015-07-09 00:31:39 +0200
commitdb03c2259a2ff2eceddecc92e7dd1fc6bc9ca126 (patch)
tree69efb1078c70916cba35bfe615f4b0a47f701176 /src/arch/arm/libgcc
parenta3f1a2e2bf4f749b9eb7cb5108ce76b7c1c2247b (diff)
downloadcoreboot-db03c2259a2ff2eceddecc92e7dd1fc6bc9ca126.tar.xz
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>
Diffstat (limited to 'src/arch/arm/libgcc')
-rw-r--r--src/arch/arm/libgcc/Makefile.inc1
-rw-r--r--src/arch/arm/libgcc/libgcc.h26
-rw-r--r--src/arch/arm/libgcc/udivmoddi4.c48
-rw-r--r--src/arch/arm/libgcc/umoddi3.c24
4 files changed, 99 insertions, 0 deletions
diff --git a/src/arch/arm/libgcc/Makefile.inc b/src/arch/arm/libgcc/Makefile.inc
index aa2acfe556..6724ee6a66 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 0000000000..afd219c6d9
--- /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 0000000000..afc91f4317
--- /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 0000000000..406442739e
--- /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;
+}