diff options
Diffstat (limited to 'lib/modti3.c')
-rw-r--r-- | lib/modti3.c | 37 |
1 files changed, 19 insertions, 18 deletions
diff --git a/lib/modti3.c b/lib/modti3.c index 91ff8aa5d..75d688ef0 100644 --- a/lib/modti3.c +++ b/lib/modti3.c @@ -1,15 +1,16 @@ -//===-- modti3.c - Implement __modti3 -------------------------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file implements __modti3 for the compiler_rt library. -// -//===----------------------------------------------------------------------===// +/* ===-- modti3.c - Implement __modti3 -------------------------------------=== + * + * The LLVM Compiler Infrastructure + * + * This file is distributed under the University of Illinois Open Source + * License. See LICENSE.TXT for details. + * + * ===----------------------------------------------------------------------=== + * + * This file implements __modti3 for the compiler_rt library. + * + * ===----------------------------------------------------------------------=== + */ #if __x86_64 @@ -17,19 +18,19 @@ tu_int __udivmodti4(tu_int a, tu_int b, tu_int* rem); -// Returns: a % b +/*Returns: a % b */ ti_int __modti3(ti_int a, ti_int b) { const int bits_in_tword_m1 = (int)(sizeof(ti_int) * CHAR_BIT) - 1; - ti_int s = b >> bits_in_tword_m1; // s = b < 0 ? -1 : 0 - b = (b ^ s) - s; // negate if s == -1 - s = a >> bits_in_tword_m1; // s = a < 0 ? -1 : 0 - a = (a ^ s) - s; // negate if s == -1 + ti_int s = b >> bits_in_tword_m1; /* s = b < 0 ? -1 : 0 */ + b = (b ^ s) - s; /* negate if s == -1 */ + s = a >> bits_in_tword_m1; /* s = a < 0 ? -1 : 0 */ + a = (a ^ s) - s; /* negate if s == -1 */ ti_int r; __udivmodti4(a, b, (tu_int*)&r); - return (r ^ s) - s; // negate if s == -1 + return (r ^ s) - s; /* negate if s == -1 */ } #endif |