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Annotation of 43BSDReno/lib/libc/tahoe/fpe/cmpf.s, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1986 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * This code is derived from software contributed to Berkeley by
                      6:  * Computer Consoles Inc.
                      7:  *
                      8:  * Redistribution and use in source and binary forms are permitted
                      9:  * provided that: (1) source distributions retain this entire copyright
                     10:  * notice and comment, and (2) distributions including binaries display
                     11:  * the following acknowledgement:  ``This product includes software
                     12:  * developed by the University of California, Berkeley and its contributors''
                     13:  * in the documentation or other materials provided with the distribution
                     14:  * and in all advertising materials mentioning features or use of this
                     15:  * software. Neither the name of the University nor the names of its
                     16:  * contributors may be used to endorse or promote products derived
                     17:  * from this software without specific prior written permission.
                     18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     19:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     20:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     21:  */
                     22: 
                     23: #if defined(SYSLIBC_SCCS) && !defined(lint)
                     24:        .asciz "@(#)cmpf.s      1.3 (Berkeley) 6/1/90"
                     25: #endif /* SYSLIBC_SCCS and not lint */
                     26: 
                     27: /*
                     28:  * cmpf(f1, f2)
                     29:  *     float f1, f2;
                     30:  * return -1, 0, 1 as f1 <, ==, > f2
                     31:  */
                     32: #include "DEFS.h"
                     33: 
                     34: XENTRY(cmpf, 0)
                     35:        cmpl    4(fp),12(fp)
                     36:        jneq    1f
                     37:        clrl    r0
                     38:        ret
                     39: 1:
                     40:        movl    4(fp),r0
                     41:        jgeq    1f
                     42:        xorl2   $0x80000000,r0
                     43:        mnegl   r0,r0
                     44: 1:
                     45:        movl    12(fp),r1
                     46:        jgeq    1f
                     47:        xorl2   $0x80000000,r1
                     48:        mnegl   r1,r1
                     49: 1:
                     50:        cmpl    r0,r1
                     51:        jleq    1f
                     52:        movl    $1,r0
                     53:        ret
                     54: 1:
                     55:        mnegl   $1,r0
                     56:        ret

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