diff options
Diffstat (limited to 'lib/libc/sparc64/fpu/fpu_arith.h')
| -rw-r--r-- | lib/libc/sparc64/fpu/fpu_arith.h | 87 |
1 files changed, 0 insertions, 87 deletions
diff --git a/lib/libc/sparc64/fpu/fpu_arith.h b/lib/libc/sparc64/fpu/fpu_arith.h deleted file mode 100644 index 292cd70..0000000 --- a/lib/libc/sparc64/fpu/fpu_arith.h +++ /dev/null @@ -1,87 +0,0 @@ -/* - * Copyright (c) 1992, 1993 - * The Regents of the University of California. All rights reserved. - * - * This software was developed by the Computer Systems Engineering group - * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and - * contributed to Berkeley. - * - * 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. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. - * - * @(#)fpu_arith.h 8.1 (Berkeley) 6/11/93 - * $NetBSD: fpu_arith.h,v 1.3 2000/07/24 04:11:03 mycroft Exp $ - * $FreeBSD$ - */ - -/* - * Extended-precision arithmetic. - * - * We hold the notion of a `carry register', which may or may not be a - * machine carry bit or register. On the SPARC, it is just the machine's - * carry bit. - * - * In the worst case, you can compute the carry from x+y as - * (unsigned)(x + y) < (unsigned)x - * and from x+y+c as - * ((unsigned)(x + y + c) <= (unsigned)x && (y|c) != 0) - * for example. - */ - -/* set up for extended-precision arithemtic */ -#define FPU_DECL_CARRY - -/* - * We have three kinds of add: - * add with carry: r = x + y + c - * add (ignoring current carry) and set carry: c'r = x + y + 0 - * add with carry and set carry: c'r = x + y + c - * The macros use `C' for `use carry' and `S' for `set carry'. - * Note that the state of the carry is undefined after ADDC and SUBC, - * so if all you have for these is `add with carry and set carry', - * that is OK. - * - * The same goes for subtract, except that we compute x - y - c. - * - * Finally, we have a way to get the carry into a `regular' variable, - * or set it from a value. SET_CARRY turns 0 into no-carry, nonzero - * into carry; GET_CARRY sets its argument to 0 or 1. - */ -#define FPU_ADDC(r, x, y) \ - __asm __volatile("addx %1,%2,%0" : "=r"(r) : "r"(x), "r"(y)) -#define FPU_ADDS(r, x, y) \ - __asm __volatile("addcc %1,%2,%0" : "=r"(r) : "r"(x), "r"(y)) -#define FPU_ADDCS(r, x, y) \ - __asm __volatile("addxcc %1,%2,%0" : "=r"(r) : "r"(x), "r"(y)) -#define FPU_SUBC(r, x, y) \ - __asm __volatile("subx %1,%2,%0" : "=r"(r) : "r"(x), "r"(y)) -#define FPU_SUBS(r, x, y) \ - __asm __volatile("subcc %1,%2,%0" : "=r"(r) : "r"(x), "r"(y)) -#define FPU_SUBCS(r, x, y) \ - __asm __volatile("subxcc %1,%2,%0" : "=r"(r) : "r"(x), "r"(y)) - -#define FPU_GET_CARRY(r) __asm __volatile("addx %%g0,%%g0,%0" : "=r"(r)) -#define FPU_SET_CARRY(v) __asm __volatile("addcc %0,-1,%%g0" : : "r"(v)) - -#define FPU_SHL1_BY_ADD /* shift left 1 faster by ADDC than (a<<1)|(b>>31) */ |
