1 files changed, 71 insertions, 0 deletions
diff --git a/lib/libutils/isoc/arch/arm/arm32_aeabi_shift.c b/lib/libutils/isoc/arch/arm/arm32_aeabi_shift.c
new file mode 100644
index 0000000..420832c
--- /dev/null
+++ b/lib/libutils/isoc/arch/arm/arm32_aeabi_shift.c
@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2015, Linaro Limited
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+union dword {
+	unsigned long long dw;
+	unsigned long w[2];
+};
+
+long long __aeabi_llsl(long long a, int shift);
+long long __aeabi_llsl(long long a, int shift)
+{
+	union dword dword = { .dw = a };
+	unsigned long hi = dword.w[1];
+	unsigned long lo = dword.w[0];
+
+	if (shift >= 32) {
+		hi = lo << (shift - 32);
+		lo = 0;
+	} else if (shift > 0) {
+		hi = (hi << shift) | (lo >> (32 - shift));
+		lo = lo << shift;
+	}
+
+	dword.w[1] = hi;
+	dword.w[0] = lo;
+	return dword.dw;
+}
+
+long long __aeabi_llsr(long long a, int shift);
+long long __aeabi_llsr(long long a, int shift)
+{
+	union dword dword = { .dw = a };
+	unsigned long hi = dword.w[1];
+	unsigned long lo = dword.w[0];
+
+	if (shift >= 32) {
+		lo = hi >> (shift - 32);
+		hi = 0;
+	} else if (shift > 0) {
+		lo = (lo >> shift) | (hi << (32 - shift));
+		hi = hi >> shift;
+	}
+
+	dword.w[1] = hi;
+	dword.w[0] = lo;
+	return dword.dw;
+}