|
| sint.sa 3.112/10/90
|
| The entry point sINT computes the rounded integer
| equivalent of the input argument, sINTRZ computes
| the integer rounded to zero of the input argument.
|
| Entry points sint and sintrz are called from do_func
| to emulate the fint and fintrz unimplemented instructions,
| respectively. Entry point sintdo is used by bindec.
|
| Input: (Entry points sint and sintrz) Double-extended
| number X in the ETEMP space in the floating-point
| save stack.
| (Entry point sintdo) Double-extended number X in
| location pointed to by the address register a0.
| (Entry point sintd) Double-extended denormalized
| number X in the ETEMP space in the floating-point
| save stack.
|
| Output: The function returns int(X) or intrz(X) in fp0.
|
| Modifies: fp0.
|
| Algorithm: (sint and sintrz)
|
| 1. If exp(X) >= 63, return X.
| If exp(X) < 0, return +/- 0 or +/- 1, according to
| | sint.a 3.11210/90
|
| 2. (X is in range) set rsc = 63 - exp(X). Unnormalize the
| result to the exponent $403e.
|
| 3. Round the result in the mode given in USER_FPCR. For
| sintrz, force round-to-zero mode.
|
| 4. Normalize the rounded result; store in fp0.
|
| For the denormalized cases, force the correct result
| for the given sign and rounding mode.
|
| Sign(X)
| RMODE + |equivalent of the input argument, sINTRZ computes
| ----- --------
| RN +0 -0
| RZ +0 -0
| RM|the integer roundedto of the input argument.
| RP +1 -0
|
|
| Copyright|
| AllRights Reserved
|
| For details on the license for this file, please |to the fint and unimplemented instructions,
| filely.Entrypoint sintdo is used by bindec.
| number inthe ETEMP space in the floating-point
|section8
#include "fpsp.h"
|xref | (ntry point sintdo) Double-extended number X in
xref nrm_set
|ref round
| number X the ETEMP space in the floating-point
|xref ld_pone
|xref ld_mone| save stack.
|xref ld_pzero
|xref ld_mzero
|xref snzrinx
|
| FINT|
|
.global sint
sint:
bfextu FPCR_MODE(|Output The function returns int(X) or (X) nfp0
licitlyhas extend precision|
;in upper word.
movel %d1,L_SCR1(%a6) |save mode bits
bras sintexc
|
| FINT with extended denorm inputs.
|
.global| 1.If (X) > 63 X.
sintd:
btstb #5,FPCR_MODE%a6)
| the rounding mode.
btstb #4,FPCR_MODE(%a6)
beqs rnd_mns
rnd_pls:
btstbjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
bnes sintmz
bsr ld_pone the exponent $403ejava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
bra t_inx2
rnd_mns:
btstb #sign_bit,LOCAL_EX| sintrz, force round-to-zero mode.
beqs sintpz
bsr ld_mone |if|
bra t_inx2
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 1
java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 13
bra t_inx2
sintmz:
bsr ld_mzero
bra t_inx2
|
| FINTRZ
| SignX)
sintrz:
movel #,L_SCR1(%6 |serz mode for rounding
| ;implicitly has extend precision
;nupper word.
bras sintexc
|
| SINTDO
|
| Input: a0 | RM+ -
Output: fp0 has the result
|
| Exceptions:
|
| If the |
| ainx bits in the USER_FPSR are set|
|
|
.lobal sintdo
sintdo:
bfextu FPCR_MODE(%a6){#2:#2},%d1 |java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 1
| ;implicitly has ext precision
| ;in upper word.
movel %d1,L_SCR1(%a6) |save mode |file, README, in this same directory.
|
| Real work of sint is in sintexc
|
|SINT idnt2,1 Motorola 040 Floating Point Software Package
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
|
sneLOCAL_SGN(%a0java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
xrefround
bgts out_rnge |branch if exp < 63
cmpw #0x3ffd,java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 14
|if 63> exp > 0, do calc
|
| Input is less |ref
rounding modes. L_SCR1 contains the rmode in the lower byte.
|
un_rnge|
btstb #1,L_SCR1+3(%a6) |check for rn and rz
beqs un_rnrz
.lobal sint
un_rmrp_neg
|
is + If rp, load+10,ifrm load +.0
|
cmpib #3,L_SCR1+3(%a6) |check for rp
beqs un_ldpone movel %d1,L_SCR1(%a6) |save mode bits
bsr bras sintexc
bra
un_ldpone:
bsr ld_pone
bra t_inx2
|
| Sign is -. If rm|FINT with extended denorm inputs.
|
un_rmrp_neg:
mpib #2,L_SCR1+3(%a6) |check for rm
beqs un_ldmone |if rm, load -1. .lobal sintd
bsr btstb #,FPCR_MODE(%a6)
bra t_inx2
un_ldmone:
bsr ld_mone
bra t_inx2
|
|Rmode rnor rz; return signed zero
|
un_rnrz:
tstb LOCAL_SGN(%a0 btstb #,FPCR_MODE(a6)
bnes un_rnrz_neg
rnd_pls:
bra t_inx2
un_rnrz_neg:
bsr ld_mzero
bra t_inx2
btstb #ign_bit,LOCAL_EX(%a0)
| Input is greater than 2^63 bnes sintmz
| the input
|
out_rnge:
bfclr LOCAL_SGN(%a0){#0:#8} |change rnd_mns:
beqs intps
bsetb #sign_bit,LOCAL_EX(% btstb #sign_bit,LOCAL_EX(%a0)
intps:
fmovel %fpcr,-(%sp)
fmovel # beqs sintpz
fmovex LOCAL_EX(%a0),%fp0 |if bsr |f mns and neg,answer is 1
| ;then bra t_inx2
| ;there are no fraction bits
fmovel (%p),%pcr
rts
in_rnge:
| ;shift off fraction bits
clrl%d0 |cleard0 -initial g,r,s for
| ;dnrm_lp
movel #0x403e,%d1 |set threshold sintmz:
| ;assumes a0 points to operand
dnrm_lp
bra t_inx2
| ;pointed by a0
| ;output d0 suppliesjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
| ;sed round
movel (%a6),d1 |seselected rounding mode
|
|
bsr round |round the unnorm based on users
put a0 to ext X
bras sintexc
| ; d1 PREC/MODE info
| ;output|
| ;inexact flag
| ;if initial grs set
|
| normalize the rounded result and|Output: fp0 has the result
|
bsr java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 1
| ;: a0 points to operand to
| ;enormalized
;utput a0 points normalized
| result
bfclr LOCAL_SGN(a)#0#8java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
beqs
bsetb #ign_bitLOCAL_EX(a0)returnto extended
fmovel fpcr,-sp)
java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
LOCAL_EX(%0,fp0 m result to
#0403,OCAL_EX%)| if (nbiased exp 63
rts
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