diff options
author | Dimitry Andric <dim@FreeBSD.org> | 2015-01-07 19:55:37 +0000 |
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committer | Dimitry Andric <dim@FreeBSD.org> | 2015-01-07 19:55:37 +0000 |
commit | ca9211ecdede9bdedb812b2243a4abdb8dacd1b9 (patch) | |
tree | 9b19e801150082c33e9152275829a6ce90614b55 /lib/multi3.c | |
parent | 8ef50bf3d1c287b5013c3168de77a462dfce3495 (diff) |
Diffstat (limited to 'lib/multi3.c')
-rw-r--r-- | lib/multi3.c | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/lib/multi3.c b/lib/multi3.c deleted file mode 100644 index 0b8730f08cec0..0000000000000 --- a/lib/multi3.c +++ /dev/null @@ -1,58 +0,0 @@ -/* ===-- multi3.c - Implement __multi3 -------------------------------------=== - * - * 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 __multi3 for the compiler_rt library. - * - * ===----------------------------------------------------------------------=== - */ - -#include "int_lib.h" - -#if __x86_64 - -/* Returns: a * b */ - -static -ti_int -__mulddi3(du_int a, du_int b) -{ - twords r; - const int bits_in_dword_2 = (int)(sizeof(di_int) * CHAR_BIT) / 2; - const du_int lower_mask = (du_int)~0 >> bits_in_dword_2; - r.s.low = (a & lower_mask) * (b & lower_mask); - du_int t = r.s.low >> bits_in_dword_2; - r.s.low &= lower_mask; - t += (a >> bits_in_dword_2) * (b & lower_mask); - r.s.low += (t & lower_mask) << bits_in_dword_2; - r.s.high = t >> bits_in_dword_2; - t = r.s.low >> bits_in_dword_2; - r.s.low &= lower_mask; - t += (b >> bits_in_dword_2) * (a & lower_mask); - r.s.low += (t & lower_mask) << bits_in_dword_2; - r.s.high += t >> bits_in_dword_2; - r.s.high += (a >> bits_in_dword_2) * (b >> bits_in_dword_2); - return r.all; -} - -/* Returns: a * b */ - -ti_int -__multi3(ti_int a, ti_int b) -{ - twords x; - x.all = a; - twords y; - y.all = b; - twords r; - r.all = __mulddi3(x.s.low, y.s.low); - r.s.high += x.s.high * y.s.low + x.s.low * y.s.high; - return r.all; -} - -#endif /* __x86_64 */ |