projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 1f0502d3 | 1 | /* |
| aaea5b2e KB |
2 | * Copyright (c) 1986, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. | |
| 1f0502d3 KB |
4 | * |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Computer Consoles Inc. | |
| 7 | * | |
| c0567266 KB |
8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions | |
| 10 | * are met: | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in the | |
| 15 | * documentation and/or other materials provided with the distribution. | |
| 16 | * 3. All advertising materials mentioning features or use of this software | |
| 17 | * must display the following acknowledgement: | |
| 18 | * This product includes software developed by the University of | |
| 19 | * California, Berkeley and its contributors. | |
| 20 | * 4. Neither the name of the University nor the names of its contributors | |
| 21 | * may be used to endorse or promote products derived from this software | |
| 22 | * without specific prior written permission. | |
| 23 | * | |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 34 | * SUCH DAMAGE. | |
| 1f0502d3 KB |
35 | */ |
| 36 | ||
| 37 | #if defined(SYSLIBC_SCCS) && !defined(lint) | |
| ad787160 | 38 | .asciz "@(#)negd.s 8.1 (Berkeley) 6/4/93" |
| 1f0502d3 | 39 | #endif /* SYSLIBC_SCCS and not lint */ |
| 6bcd055f | 40 | |
| 879c650f SL |
41 | #include <tahoemath/fp.h> |
| 42 | #include "DEFS.h" | |
| 2b252132 | 43 | |
| 879c650f | 44 | XENTRY(negd, 0) |
| 6bcd055f | 45 | andl3 $EXPMASK,4(fp),r0 /* check for reserved operand,zero. */ |
| 879c650f | 46 | beql isreserved |
| 6bcd055f SL |
47 | movl 4(fp),r0 /* fetch operand. */ |
| 48 | movl 8(fp),r1 | |
| 49 | bbc $31,r0,seton | |
| 50 | andl2 $(0!SIGNBIT),r0 /* turn it off. */ | |
| 51 | ret | |
| 52 | seton: orl2 $SIGNBIT,r0 /* turn it on. */ | |
| 53 | ret | |
| 879c650f SL |
54 | isreserved: |
| 55 | bbc $31,4(fp),retzero | |
| 56 | callf $4,fpresop | |
| 57 | ret | |
| 6bcd055f SL |
58 | retzero: |
| 59 | clrl r0 | |
| 60 | clrl r1 | |
| 61 | ret |