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-rw-r--r--lib/builtins/muldi3.c87
1 files changed, 40 insertions, 47 deletions
diff --git a/lib/builtins/muldi3.c b/lib/builtins/muldi3.c
index a187315e9165..013f669a1833 100644
--- a/lib/builtins/muldi3.c
+++ b/lib/builtins/muldi3.c
@@ -1,58 +1,51 @@
-/* ===-- muldi3.c - Implement __muldi3 -------------------------------------===
- *
- * The LLVM Compiler Infrastructure
- *
- * This file is dual licensed under the MIT and the University of Illinois Open
- * Source Licenses. See LICENSE.TXT for details.
- *
- * ===----------------------------------------------------------------------===
- *
- * This file implements __muldi3 for the compiler_rt library.
- *
- * ===----------------------------------------------------------------------===
- */
+//===-- muldi3.c - Implement __muldi3 -------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __muldi3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
#include "int_lib.h"
-/* Returns: a * b */
+// Returns: a * b
-static
-di_int
-__muldsi3(su_int a, su_int b)
-{
- dwords r;
- const int bits_in_word_2 = (int)(sizeof(si_int) * CHAR_BIT) / 2;
- const su_int lower_mask = (su_int)~0 >> bits_in_word_2;
- r.s.low = (a & lower_mask) * (b & lower_mask);
- su_int t = r.s.low >> bits_in_word_2;
- r.s.low &= lower_mask;
- t += (a >> bits_in_word_2) * (b & lower_mask);
- r.s.low += (t & lower_mask) << bits_in_word_2;
- r.s.high = t >> bits_in_word_2;
- t = r.s.low >> bits_in_word_2;
- r.s.low &= lower_mask;
- t += (b >> bits_in_word_2) * (a & lower_mask);
- r.s.low += (t & lower_mask) << bits_in_word_2;
- r.s.high += t >> bits_in_word_2;
- r.s.high += (a >> bits_in_word_2) * (b >> bits_in_word_2);
- return r.all;
+static di_int __muldsi3(su_int a, su_int b) {
+ dwords r;
+ const int bits_in_word_2 = (int)(sizeof(si_int) * CHAR_BIT) / 2;
+ const su_int lower_mask = (su_int)~0 >> bits_in_word_2;
+ r.s.low = (a & lower_mask) * (b & lower_mask);
+ su_int t = r.s.low >> bits_in_word_2;
+ r.s.low &= lower_mask;
+ t += (a >> bits_in_word_2) * (b & lower_mask);
+ r.s.low += (t & lower_mask) << bits_in_word_2;
+ r.s.high = t >> bits_in_word_2;
+ t = r.s.low >> bits_in_word_2;
+ r.s.low &= lower_mask;
+ t += (b >> bits_in_word_2) * (a & lower_mask);
+ r.s.low += (t & lower_mask) << bits_in_word_2;
+ r.s.high += t >> bits_in_word_2;
+ r.s.high += (a >> bits_in_word_2) * (b >> bits_in_word_2);
+ return r.all;
}
-/* Returns: a * b */
+// Returns: a * b
-COMPILER_RT_ABI di_int
-__muldi3(di_int a, di_int b)
-{
- dwords x;
- x.all = a;
- dwords y;
- y.all = b;
- dwords r;
- r.all = __muldsi3(x.s.low, y.s.low);
- r.s.high += x.s.high * y.s.low + x.s.low * y.s.high;
- return r.all;
+COMPILER_RT_ABI di_int __muldi3(di_int a, di_int b) {
+ dwords x;
+ x.all = a;
+ dwords y;
+ y.all = b;
+ dwords r;
+ r.all = __muldsi3(x.s.low, y.s.low);
+ r.s.high += x.s.high * y.s.low + x.s.low * y.s.high;
+ return r.all;
}
#if defined(__ARM_EABI__)
-AEABI_RTABI di_int __aeabi_lmul(di_int a, di_int b) COMPILER_RT_ALIAS(__muldi3);
+COMPILER_RT_ALIAS(__muldi3, __aeabi_lmul)
#endif