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Annotation of 43BSDTahoe/sys/tahoemath/Knegf.s, revision 1.1.1.1

1.1       root        1: /*     Knegf.s 1.3     86/01/05        */
                      2: 
                      3: #include "../tahoemath/fp.h"
                      4: #include "../tahoemath/Kfp.h"
                      5: #include "../tahoe/SYS.h"
                      6: 
                      7:        .text
                      8: ENTRY(Knegf, 0)
                      9:        clrl    r1
                     10:        andl3   $EXPMASK,4(fp),r0       /* check for reserved operand,zero. */
                     11:        beql    retzero
                     12:        movl    4(fp),r0                /* fetch operand. */
                     13:        bbc     $31,r0,seton
                     14:        andl2   $(0!SIGNBIT),r0         /* turn it off. */
                     15:        ret
                     16: seton: orl2    $SIGNBIT,r0             /* turn it on. */
                     17:        ret
                     18: retzero:
                     19:        clrl    r0
                     20:        ret

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