Subversion Repositories openrisc_2011-10-31

//
//      $Id: sto_res.S,v 1.2 2001-09-27 12:01:22 chris Exp $
//
//      sto_res.sa 3.1 12/10/90
//
//      Takes the result and puts it in where the user expects it.
//      Library functions return result in fp0. If fp0 is not the
//      users destination register then fp0 is moved to the the
//      correct floating-point destination register.  fp0 and fp1
//      are then restored to the original contents. 
//
//      Input:  result in fp0,fp1 
//
//              d2 & a0 should be kept unmodified
//
//      Output: moves the result to the true destination reg or mem
//
//      Modifies: destination floating point register
//

//              Copyright (C) Motorola, Inc. 1990
//                      All Rights Reserved
//
//      THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF MOTOROLA 
//      The copyright notice above does not evidence any  
//      actual or intended publication of such source code.

STO_RES:        //idnt  2,1 | Motorola 040 Floating Point Software Package


        |section        8

#include "fpsp.defs"

        .global sto_cos
sto_cos:
        bfextu          CMDREG1B(%a6){#13:#3},%d0       //extract cos destination
        cmpib           #3,%d0          //check for fp0/fp1 cases
        bles            c_fp0123
        fmovemx %fp1-%fp1,-(%a7)
        moveql          #7,%d1
        subl            %d0,%d1         //d1 = 7- (dest. reg. no.)
        clrl            %d0
        bsetl           %d1,%d0         //d0 is dynamic register mask
        fmovemx (%a7)+,%d0
        rts
c_fp0123:
        cmpib           #0,%d0
        beqs            c_is_fp0
        cmpib           #1,%d0
        beqs            c_is_fp1
        cmpib           #2,%d0
        beqs            c_is_fp2
c_is_fp3:
        fmovemx %fp1-%fp1,USER_FP3(%a6)
        rts
c_is_fp2:
        fmovemx %fp1-%fp1,USER_FP2(%a6)
        rts
c_is_fp1:
        fmovemx %fp1-%fp1,USER_FP1(%a6)
        rts
c_is_fp0:
        fmovemx %fp1-%fp1,USER_FP0(%a6)
        rts


        .global sto_res
sto_res:
        bfextu          CMDREG1B(%a6){#6:#3},%d0        //extract destination register
        cmpib           #3,%d0          //check for fp0/fp1 cases
        bles            fp0123
        fmovemx %fp0-%fp0,-(%a7)
        moveql          #7,%d1
        subl            %d0,%d1         //d1 = 7- (dest. reg. no.)
        clrl            %d0
        bsetl           %d1,%d0         //d0 is dynamic register mask
        fmovemx (%a7)+,%d0
        rts
fp0123:
        cmpib           #0,%d0
        beqs            is_fp0
        cmpib           #1,%d0
        beqs            is_fp1
        cmpib           #2,%d0
        beqs            is_fp2
is_fp3:
        fmovemx %fp0-%fp0,USER_FP3(%a6)
        rts
is_fp2:
        fmovemx %fp0-%fp0,USER_FP2(%a6)
        rts
is_fp1:
        fmovemx %fp0-%fp0,USER_FP1(%a6)
        rts
is_fp0:
        fmovemx %fp0-%fp0,USER_FP0(%a6)
        rts

        |end