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+|
+| util.sa 3.7 7/29/91
+|
+| This file contains routines used by other programs.
+|
+| ovf_res: used by overflow to force the correct
+| result. ovf_r_k, ovf_r_x2, ovf_r_x3 are
+| derivatives of this routine.
+| get_fline: get user's opcode word
+| g_dfmtou: returns the destination format.
+| g_opcls: returns the opclass of the float instruction.
+| g_rndpr: returns the rounding precision.
+| reg_dest: write byte, word, or long data to Dn
+|
+|
+| Copyright (C) Motorola, Inc. 1990
+| All Rights Reserved
+|
+| For details on the license for this file, please see the
+| file, README, in this same directory.
+
+|UTIL idnt 2,1 | Motorola 040 Floating Point Software Package
+
+ |section 8
+
+#include "fpsp.h"
+
+ |xref mem_read
+
+ .global g_dfmtou
+ .global g_opcls
+ .global g_rndpr
+ .global get_fline
+ .global reg_dest
+
+|
+| Final result table for ovf_res. Note that the negative counterparts
+| are unnecessary as ovf_res always returns the sign separately from
+| the exponent.
+| ;+inf
+EXT_PINF: .long 0x7fff0000,0x00000000,0x00000000,0x00000000
+| ;largest +ext
+EXT_PLRG: .long 0x7ffe0000,0xffffffff,0xffffffff,0x00000000
+| ;largest magnitude +sgl in ext
+SGL_PLRG: .long 0x407e0000,0xffffff00,0x00000000,0x00000000
+| ;largest magnitude +dbl in ext
+DBL_PLRG: .long 0x43fe0000,0xffffffff,0xfffff800,0x00000000
+| ;largest -ext
+
+tblovfl:
+ .long EXT_RN
+ .long EXT_RZ
+ .long EXT_RM
+ .long EXT_RP
+ .long SGL_RN
+ .long SGL_RZ
+ .long SGL_RM
+ .long SGL_RP
+ .long DBL_RN
+ .long DBL_RZ
+ .long DBL_RM
+ .long DBL_RP
+ .long error
+ .long error
+ .long error
+ .long error
+
+
+|
+| ovf_r_k --- overflow result calculation
+|
+| This entry point is used by kernel_ex.
+|
+| This forces the destination precision to be extended
+|
+| Input: operand in ETEMP
+| Output: a result is in ETEMP (internal extended format)
+|
+ .global ovf_r_k
+ovf_r_k:
+ lea ETEMP(%a6),%a0 |a0 points to source operand
+ bclrb #sign_bit,ETEMP_EX(%a6)
+ sne ETEMP_SGN(%a6) |convert to internal IEEE format
+
+|
+| ovf_r_x2 --- overflow result calculation
+|
+| This entry point used by x_ovfl. (opclass 0 and 2)
+|
+| Input a0 points to an operand in the internal extended format
+| Output a0 points to the result in the internal extended format
+|
+| This sets the round precision according to the user's FPCR unless the
+| instruction is fsgldiv or fsglmul or fsadd, fdadd, fsub, fdsub, fsmul,
+| fdmul, fsdiv, fddiv, fssqrt, fsmove, fdmove, fsabs, fdabs, fsneg, fdneg.
+| If the instruction is fsgldiv of fsglmul, the rounding precision must be
+| extended. If the instruction is not fsgldiv or fsglmul but a force-
+| precision instruction, the rounding precision is then set to the force
+| precision.
+
+ .global ovf_r_x2
+ovf_r_x2:
+ btstb #E3,E_BYTE(%a6) |check for nu exception
+ beql ovf_e1_exc |it is cu exception
+ovf_e3_exc:
+ movew CMDREG3B(%a6),%d0 |get the command word
+ andiw #0x00000060,%d0 |clear all bits except 6 and 5
+ cmpil #0x00000040,%d0
+ beql ovff_sgl |force precision is single
+ cmpil #0x00000060,%d0
+ beql ovff_dbl |force precision is double
+ movew CMDREG3B(%a6),%d0 |get the command word again
+ andil #0x7f,%d0 |clear all except operation
+ cmpil #0x33,%d0
+ beql ovf_fsgl |fsglmul or fsgldiv
+ cmpil #0x30,%d0
+ beql ovf_fsgl
+ bra ovf_fpcr |instruction is none of the above
+| ;use FPCR
+ovf_e1_exc:
+ movew CMDREG1B(%a6),%d0 |get command word
+ andil #0x00000044,%d0 |clear all bits except 6 and 2
+ cmpil #0x00000040,%d0
+ beql ovff_sgl |the instruction is force single
+ cmpil #0x00000044,%d0
+ beql ovff_dbl |the instruction is force double
+ movew CMDREG1B(%a6),%d0 |again get the command word
+ andil #0x0000007f,%d0 |clear all except the op code
+ cmpil #0x00000027,%d0
+ beql ovf_fsgl |fsglmul
+ cmpil #0x00000024,%d0
+ beql ovf_fsgl |fsgldiv
+ bra ovf_fpcr |none of the above, use FPCR
+|
+|
+| Inst is either fsgldiv or fsglmul. Force extended precision.
+|
+ovf_fsgl:
+ clrl %d0
+ bra ovf_res
+
+ovff_sgl:
+ movel #0x00000001,%d0 |set single
+ bra ovf_res
+ovff_dbl:
+ movel #0x00000002,%d0 |set double
+ bra ovf_res
+|
+| The precision is in the fpcr.
+|
+ovf_fpcr:
+ bfextu FPCR_MODE(%a6){#0:#2},%d0 |set round precision
+ bra ovf_res
+
+|
+|
+| ovf_r_x3 --- overflow result calculation
+|
+| This entry point used by x_ovfl. (opclass 3 only)
+|
+| Input a0 points to an operand in the internal extended format
+| Output a0 points to the result in the internal extended format
+|
+| This sets the round precision according to the destination size.
+|
+ .global ovf_r_x3
+ovf_r_x3:
+ bsr g_dfmtou |get dest fmt in d0{1:0}
+| ;for fmovout, the destination format
+| ;is the rounding precision
+
+|
+| ovf_res --- overflow result calculation
+|
+| Input:
+| a0 points to operand in internal extended format
+| Output:
+| a0 points to result in internal extended format
+|
+ .global ovf_res
+ovf_res:
+ lsll #2,%d0 |move round precision to d0{3:2}
+ bfextu FPCR_MODE(%a6){#2:#2},%d1 |set round mode
+ orl %d1,%d0 |index is fmt:mode in d0{3:0}
+ leal tblovfl,%a1 |load a1 with table address
+ movel %a1@(%d0:l:4),%a1 |use d0 as index to the table
+ jmp (%a1) |go to the correct routine
+|
+|case DEST_FMT = EXT
+|
+EXT_RN:
+ leal EXT_PINF,%a1 |answer is +/- infinity
+ bsetb #inf_bit,FPSR_CC(%a6)
+ bra set_sign |now go set the sign
+EXT_RZ:
+ leal EXT_PLRG,%a1 |answer is +/- large number
+ bra set_sign |now go set the sign
+EXT_RM:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs e_rm_pos
+e_rm_neg:
+ leal EXT_PINF,%a1 |answer is negative infinity
+ orl #neginf_mask,USER_FPSR(%a6)
+ bra end_ovfr
+e_rm_pos:
+ leal EXT_PLRG,%a1 |answer is large positive number
+ bra end_ovfr
+EXT_RP:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs e_rp_pos
+e_rp_neg:
+ leal EXT_PLRG,%a1 |answer is large negative number
+ bsetb #neg_bit,FPSR_CC(%a6)
+ bra end_ovfr
+e_rp_pos:
+ leal EXT_PINF,%a1 |answer is positive infinity
+ bsetb #inf_bit,FPSR_CC(%a6)
+ bra end_ovfr
+|
+|case DEST_FMT = DBL
+|
+DBL_RN:
+ leal EXT_PINF,%a1 |answer is +/- infinity
+ bsetb #inf_bit,FPSR_CC(%a6)
+ bra set_sign
+DBL_RZ:
+ leal DBL_PLRG,%a1 |answer is +/- large number
+ bra set_sign |now go set the sign
+DBL_RM:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs d_rm_pos
+d_rm_neg:
+ leal EXT_PINF,%a1 |answer is negative infinity
+ orl #neginf_mask,USER_FPSR(%a6)
+ bra end_ovfr |inf is same for all precisions (ext,dbl,sgl)
+d_rm_pos:
+ leal DBL_PLRG,%a1 |answer is large positive number
+ bra end_ovfr
+DBL_RP:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs d_rp_pos
+d_rp_neg:
+ leal DBL_PLRG,%a1 |answer is large negative number
+ bsetb #neg_bit,FPSR_CC(%a6)
+ bra end_ovfr
+d_rp_pos:
+ leal EXT_PINF,%a1 |answer is positive infinity
+ bsetb #inf_bit,FPSR_CC(%a6)
+ bra end_ovfr
+|
+|case DEST_FMT = SGL
+|
+SGL_RN:
+ leal EXT_PINF,%a1 |answer is +/- infinity
+ bsetb #inf_bit,FPSR_CC(%a6)
+ bras set_sign
+SGL_RZ:
+ leal SGL_PLRG,%a1 |answer is +/- large number
+ bras set_sign
+SGL_RM:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs s_rm_pos
+s_rm_neg:
+ leal EXT_PINF,%a1 |answer is negative infinity
+ orl #neginf_mask,USER_FPSR(%a6)
+ bras end_ovfr
+s_rm_pos:
+ leal SGL_PLRG,%a1 |answer is large positive number
+ bras end_ovfr
+SGL_RP:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs s_rp_pos
+s_rp_neg:
+ leal SGL_PLRG,%a1 |answer is large negative number
+ bsetb #neg_bit,FPSR_CC(%a6)
+ bras end_ovfr
+s_rp_pos:
+ leal EXT_PINF,%a1 |answer is positive infinity
+ bsetb #inf_bit,FPSR_CC(%a6)
+ bras end_ovfr
+
+set_sign:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs end_ovfr
+neg_sign:
+ bsetb #neg_bit,FPSR_CC(%a6)
+
+end_ovfr:
+ movew LOCAL_EX(%a1),LOCAL_EX(%a0) |do not overwrite sign
+ movel LOCAL_HI(%a1),LOCAL_HI(%a0)
+ movel LOCAL_LO(%a1),LOCAL_LO(%a0)
+ rts
+
+
+|
+| ERROR
+|
+error:
+ rts
+|
+| get_fline --- get f-line opcode of interrupted instruction
+|
+| Returns opcode in the low word of d0.
+|
+get_fline:
+ movel USER_FPIAR(%a6),%a0 |opcode address
+ movel #0,-(%a7) |reserve a word on the stack
+ leal 2(%a7),%a1 |point to low word of temporary
+ movel #2,%d0 |count
+ bsrl mem_read
+ movel (%a7)+,%d0
+ rts
+|
+| g_rndpr --- put rounding precision in d0{1:0}
+|
+| valid return codes are:
+| 00 - extended
+| 01 - single
+| 10 - double
+|
+| begin
+| get rounding precision (cmdreg3b{6:5})
+| begin
+| case opclass = 011 (move out)
+| get destination format - this is the also the rounding precision
+|
+| case opclass = 0x0
+| if E3
+| *case RndPr(from cmdreg3b{6:5} = 11 then RND_PREC = DBL
+| *case RndPr(from cmdreg3b{6:5} = 10 then RND_PREC = SGL
+| case RndPr(from cmdreg3b{6:5} = 00 | 01
+| use precision from FPCR{7:6}
+| case 00 then RND_PREC = EXT
+| case 01 then RND_PREC = SGL
+| case 10 then RND_PREC = DBL
+| else E1
+| use precision in FPCR{7:6}
+| case 00 then RND_PREC = EXT
+| case 01 then RND_PREC = SGL
+| case 10 then RND_PREC = DBL
+| end
+|
+g_rndpr:
+ bsr g_opcls |get opclass in d0{2:0}
+ cmpw #0x0003,%d0 |check for opclass 011
+ bnes op_0x0
+
+|
+| For move out instructions (opclass 011) the destination format
+| is the same as the rounding precision. Pass results from g_dfmtou.
+|
+ bsr g_dfmtou
+ rts
+op_0x0:
+ btstb #E3,E_BYTE(%a6)
+ beql unf_e1_exc |branch to e1 underflow
+unf_e3_exc:
+ movel CMDREG3B(%a6),%d0 |rounding precision in d0{10:9}
+ bfextu %d0{#9:#2},%d0 |move the rounding prec bits to d0{1:0}
+ cmpil #0x2,%d0
+ beql unff_sgl |force precision is single
+ cmpil #0x3,%d0 |force precision is double
+ beql unff_dbl
+ movew CMDREG3B(%a6),%d0 |get the command word again
+ andil #0x7f,%d0 |clear all except operation
+ cmpil #0x33,%d0
+ beql unf_fsgl |fsglmul or fsgldiv
+ cmpil #0x30,%d0
+ beql unf_fsgl |fsgldiv or fsglmul
+ bra unf_fpcr
+unf_e1_exc:
+ movel CMDREG1B(%a6),%d0 |get 32 bits off the stack, 1st 16 bits
+| ;are the command word
+ andil #0x00440000,%d0 |clear all bits except bits 6 and 2
+ cmpil #0x00400000,%d0
+ beql unff_sgl |force single
+ cmpil #0x00440000,%d0 |force double
+ beql unff_dbl
+ movel CMDREG1B(%a6),%d0 |get the command word again
+ andil #0x007f0000,%d0 |clear all bits except the operation
+ cmpil #0x00270000,%d0
+ beql unf_fsgl |fsglmul
+ cmpil #0x00240000,%d0
+ beql unf_fsgl |fsgldiv
+ bra unf_fpcr
+
+|
+| Convert to return format. The values from cmdreg3b and the return
+| values are:
+| cmdreg3b return precision
+| -------- ------ ---------
+| 00,01 0 ext
+| 10 1 sgl
+| 11 2 dbl
+| Force single
+|
+unff_sgl:
+ movel #1,%d0 |return 1
+ rts
+|
+| Force double
+|
+unff_dbl:
+ movel #2,%d0 |return 2
+ rts
+|
+| Force extended
+|
+unf_fsgl:
+ movel #0,%d0
+ rts
+|
+| Get rounding precision set in FPCR{7:6}.
+|
+unf_fpcr:
+ movel USER_FPCR(%a6),%d0 |rounding precision bits in d0{7:6}
+ bfextu %d0{#24:#2},%d0 |move the rounding prec bits to d0{1:0}
+ rts
+|
+| g_opcls --- put opclass in d0{2:0}
+|
+g_opcls:
+ btstb #E3,E_BYTE(%a6)
+ beqs opc_1b |if set, go to cmdreg1b
+opc_3b:
+ clrl %d0 |if E3, only opclass 0x0 is possible
+ rts
+opc_1b:
+ movel CMDREG1B(%a6),%d0
+ bfextu %d0{#0:#3},%d0 |shift opclass bits d0{31:29} to d0{2:0}
+ rts
+|
+| g_dfmtou --- put destination format in d0{1:0}
+|
+| If E1, the format is from cmdreg1b{12:10}
+| If E3, the format is extended.
+|
+| Dest. Fmt.
+| extended 010 -> 00
+| single 001 -> 01
+| double 101 -> 10
+|
+g_dfmtou:
+ btstb #E3,E_BYTE(%a6)
+ beqs op011
+ clrl %d0 |if E1, size is always ext
+ rts
+op011:
+ movel CMDREG1B(%a6),%d0
+ bfextu %d0{#3:#3},%d0 |dest fmt from cmdreg1b{12:10}
+ cmpb #1,%d0 |check for single
+ bnes not_sgl
+ movel #1,%d0
+ rts
+not_sgl:
+ cmpb #5,%d0 |check for double
+ bnes not_dbl
+ movel #2,%d0
+ rts
+not_dbl:
+ clrl %d0 |must be extended
+ rts
+
+|
+|
+| Final result table for unf_sub. Note that the negative counterparts
+| are unnecessary as unf_sub always returns the sign separately from
+| the exponent.
+| ;+zero
+EXT_PZRO: .long 0x00000000,0x00000000,0x00000000,0x00000000
+| ;+zero
+SGL_PZRO: .long 0x3f810000,0x00000000,0x00000000,0x00000000
+| ;+zero
+DBL_PZRO: .long 0x3c010000,0x00000000,0x00000000,0x00000000
+| ;smallest +ext denorm
+EXT_PSML: .long 0x00000000,0x00000000,0x00000001,0x00000000
+| ;smallest +sgl denorm
+SGL_PSML: .long 0x3f810000,0x00000100,0x00000000,0x00000000
+| ;smallest +dbl denorm
+DBL_PSML: .long 0x3c010000,0x00000000,0x00000800,0x00000000
+|
+| UNF_SUB --- underflow result calculation
+|
+| Input:
+| d0 contains round precision
+| a0 points to input operand in the internal extended format
+|
+| Output:
+| a0 points to correct internal extended precision result.
+|
+
+tblunf:
+ .long uEXT_RN
+ .long uEXT_RZ
+ .long uEXT_RM
+ .long uEXT_RP
+ .long uSGL_RN
+ .long uSGL_RZ
+ .long uSGL_RM
+ .long uSGL_RP
+ .long uDBL_RN
+ .long uDBL_RZ
+ .long uDBL_RM
+ .long uDBL_RP
+ .long uDBL_RN
+ .long uDBL_RZ
+ .long uDBL_RM
+ .long uDBL_RP
+
+ .global unf_sub
+unf_sub:
+ lsll #2,%d0 |move round precision to d0{3:2}
+ bfextu FPCR_MODE(%a6){#2:#2},%d1 |set round mode
+ orl %d1,%d0 |index is fmt:mode in d0{3:0}
+ leal tblunf,%a1 |load a1 with table address
+ movel %a1@(%d0:l:4),%a1 |use d0 as index to the table
+ jmp (%a1) |go to the correct routine
+|
+|case DEST_FMT = EXT
+|
+uEXT_RN:
+ leal EXT_PZRO,%a1 |answer is +/- zero
+ bsetb #z_bit,FPSR_CC(%a6)
+ bra uset_sign |now go set the sign
+uEXT_RZ:
+ leal EXT_PZRO,%a1 |answer is +/- zero
+ bsetb #z_bit,FPSR_CC(%a6)
+ bra uset_sign |now go set the sign
+uEXT_RM:
+ tstb LOCAL_SGN(%a0) |if negative underflow
+ beqs ue_rm_pos
+ue_rm_neg:
+ leal EXT_PSML,%a1 |answer is negative smallest denorm
+ bsetb #neg_bit,FPSR_CC(%a6)
+ bra end_unfr
+ue_rm_pos:
+ leal EXT_PZRO,%a1 |answer is positive zero
+ bsetb #z_bit,FPSR_CC(%a6)
+ bra end_unfr
+uEXT_RP:
+ tstb LOCAL_SGN(%a0) |if negative underflow
+ beqs ue_rp_pos
+ue_rp_neg:
+ leal EXT_PZRO,%a1 |answer is negative zero
+ oril #negz_mask,USER_FPSR(%a6)
+ bra end_unfr
+ue_rp_pos:
+ leal EXT_PSML,%a1 |answer is positive smallest denorm
+ bra end_unfr
+|
+|case DEST_FMT = DBL
+|
+uDBL_RN:
+ leal DBL_PZRO,%a1 |answer is +/- zero
+ bsetb #z_bit,FPSR_CC(%a6)
+ bra uset_sign
+uDBL_RZ:
+ leal DBL_PZRO,%a1 |answer is +/- zero
+ bsetb #z_bit,FPSR_CC(%a6)
+ bra uset_sign |now go set the sign
+uDBL_RM:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs ud_rm_pos
+ud_rm_neg:
+ leal DBL_PSML,%a1 |answer is smallest denormalized negative
+ bsetb #neg_bit,FPSR_CC(%a6)
+ bra end_unfr
+ud_rm_pos:
+ leal DBL_PZRO,%a1 |answer is positive zero
+ bsetb #z_bit,FPSR_CC(%a6)
+ bra end_unfr
+uDBL_RP:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs ud_rp_pos
+ud_rp_neg:
+ leal DBL_PZRO,%a1 |answer is negative zero
+ oril #negz_mask,USER_FPSR(%a6)
+ bra end_unfr
+ud_rp_pos:
+ leal DBL_PSML,%a1 |answer is smallest denormalized negative
+ bra end_unfr
+|
+|case DEST_FMT = SGL
+|
+uSGL_RN:
+ leal SGL_PZRO,%a1 |answer is +/- zero
+ bsetb #z_bit,FPSR_CC(%a6)
+ bras uset_sign
+uSGL_RZ:
+ leal SGL_PZRO,%a1 |answer is +/- zero
+ bsetb #z_bit,FPSR_CC(%a6)
+ bras uset_sign
+uSGL_RM:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs us_rm_pos
+us_rm_neg:
+ leal SGL_PSML,%a1 |answer is smallest denormalized negative
+ bsetb #neg_bit,FPSR_CC(%a6)
+ bras end_unfr
+us_rm_pos:
+ leal SGL_PZRO,%a1 |answer is positive zero
+ bsetb #z_bit,FPSR_CC(%a6)
+ bras end_unfr
+uSGL_RP:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs us_rp_pos
+us_rp_neg:
+ leal SGL_PZRO,%a1 |answer is negative zero
+ oril #negz_mask,USER_FPSR(%a6)
+ bras end_unfr
+us_rp_pos:
+ leal SGL_PSML,%a1 |answer is smallest denormalized positive
+ bras end_unfr
+
+uset_sign:
+ tstb LOCAL_SGN(%a0) |if negative overflow
+ beqs end_unfr
+uneg_sign:
+ bsetb #neg_bit,FPSR_CC(%a6)
+
+end_unfr:
+ movew LOCAL_EX(%a1),LOCAL_EX(%a0) |be careful not to overwrite sign
+ movel LOCAL_HI(%a1),LOCAL_HI(%a0)
+ movel LOCAL_LO(%a1),LOCAL_LO(%a0)
+ rts
+|
+| reg_dest --- write byte, word, or long data to Dn
+|
+|
+| Input:
+| L_SCR1: Data
+| d1: data size and dest register number formatted as:
+|
+| 32 5 4 3 2 1 0
+| -----------------------------------------------
+| | 0 | Size | Dest Reg # |
+| -----------------------------------------------
+|
+| Size is:
+| 0 - Byte
+| 1 - Word
+| 2 - Long/Single
+|
+pregdst:
+ .long byte_d0
+ .long byte_d1
+ .long byte_d2
+ .long byte_d3
+ .long byte_d4
+ .long byte_d5
+ .long byte_d6
+ .long byte_d7
+ .long word_d0
+ .long word_d1
+ .long word_d2
+ .long word_d3
+ .long word_d4
+ .long word_d5
+ .long word_d6
+ .long word_d7
+ .long long_d0
+ .long long_d1
+ .long long_d2
+ .long long_d3
+ .long long_d4
+ .long long_d5
+ .long long_d6
+ .long long_d7
+
+reg_dest:
+ leal pregdst,%a0
+ movel %a0@(%d1:l:4),%a0
+ jmp (%a0)
+
+byte_d0:
+ moveb L_SCR1(%a6),USER_D0+3(%a6)
+ rts
+byte_d1:
+ moveb L_SCR1(%a6),USER_D1+3(%a6)
+ rts
+byte_d2:
+ moveb L_SCR1(%a6),%d2
+ rts
+byte_d3:
+ moveb L_SCR1(%a6),%d3
+ rts
+byte_d4:
+ moveb L_SCR1(%a6),%d4
+ rts
+byte_d5:
+ moveb L_SCR1(%a6),%d5
+ rts
+byte_d6:
+ moveb L_SCR1(%a6),%d6
+ rts
+byte_d7:
+ moveb L_SCR1(%a6),%d7
+ rts
+word_d0:
+ movew L_SCR1(%a6),USER_D0+2(%a6)
+ rts
+word_d1:
+ movew L_SCR1(%a6),USER_D1+2(%a6)
+ rts
+word_d2:
+ movew L_SCR1(%a6),%d2
+ rts
+word_d3:
+ movew L_SCR1(%a6),%d3
+ rts
+word_d4:
+ movew L_SCR1(%a6),%d4
+ rts
+word_d5:
+ movew L_SCR1(%a6),%d5
+ rts
+word_d6:
+ movew L_SCR1(%a6),%d6
+ rts
+word_d7:
+ movew L_SCR1(%a6),%d7
+ rts
+long_d0:
+ movel L_SCR1(%a6),USER_D0(%a6)
+ rts
+long_d1:
+ movel L_SCR1(%a6),USER_D1(%a6)
+ rts
+long_d2:
+ movel L_SCR1(%a6),%d2
+ rts
+long_d3:
+ movel L_SCR1(%a6),%d3
+ rts
+long_d4:
+ movel L_SCR1(%a6),%d4
+ rts
+long_d5:
+ movel L_SCR1(%a6),%d5
+ rts
+long_d6:
+ movel L_SCR1(%a6),%d6
+ rts
+long_d7:
+ movel L_SCR1(%a6),%d7
+ rts
+ |end