4 * Copyright Roman Zippel, 1997. All rights reserved.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, and the entire permission notice in its entirety,
11 * including the disclaimer of warranties.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote
16 * products derived from this software without specific prior
19 * ALTERNATIVELY, this product may be distributed under the terms of
20 * the GNU General Public License, in which case the provisions of the GPL are
21 * required INSTEAD OF the above restrictions. (This clause is
22 * necessary due to a potential bad interaction between the GPL and
23 * the restrictions contained in a BSD-style copyright.)
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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33 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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35 * OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include "fp_decode.h"
41 .globl fp_scan, fp_datasize
45 | %d2 - first two instr words
48 /* operand formats are:
50 Long = 0, i.e. fmove.l
52 Extended, i.e. fmove.x
53 Packed-BCD, i.e. fmove.p
61 | FPDATA - base of emulated FPU registers
64 | normal fpu instruction? (this excludes fsave/frestore)
66 printf PDECODE,"%08x: ",1,%a0
67 getuser.b (%a0),%d0,fp_err_ua1,%a0
69 cmp.b #0xf2,%d0 | cpid = 1
71 cmp.b #0xfc,%d0 | cpid = 6
74 | first two instruction words are kept in %d2
75 getuser.l (%a0)+,%d2,fp_err_ua1,%a0
77 fp_decode_cond: | separate conditional instr
78 fp_decode_cond_instr_type
80 .long fp_decode_move, fp_fscc
81 .long fp_fbccw, fp_fbccl
83 fp_decode_move: | separate move instr
84 fp_decode_move_instr_type
86 .long fp_fgen_fp, fp_ill
87 .long fp_fgen_ea, fp_fmove_fp2mem
88 .long fp_fmovem_cr, fp_fmovem_cr
89 .long fp_fmovem_fp, fp_fmovem_fp
91 | now all arithmetic instr and a few move instr are left
92 fp_fgen_fp: | source is a fpu register
93 clr.b (FPD_FPSR+2,FPDATA) | clear the exception byte
95 printf PDECODE,"f<op>.x fp%d",1,%d0
97 lea (FPD_TEMPFP1,FPDATA),%a1 | copy src into a temp location
104 fp_fgen_ea: | source is <ea>
105 clr.b (FPD_FPSR+2,FPDATA) | clear the exception byte
106 | sort out fmovecr, keep data size in %d1
110 move.w %d0,%d1 | store data size twice in %d1
111 swap %d1 | one can be trashed below
116 move.b (%a0,%d1.w),%d0
117 printf PDECODE,"f<op>.%c ",1,%d0
120 0: .byte 'l','s','x','p','w','d','b',0
125 fp_getsource, fp_getdest
127 basically, we end up with a pointer to the source operand in
128 %a1, and a pointer to the destination operand in %a0. both
129 are, of course, 96-bit extended floating point numbers.
133 | decode addressing mode for source
136 .long fp_data, fp_ill
137 .long fp_indirect, fp_postinc
138 .long fp_predecr, fp_disp16
139 .long fp_extmode0, fp_extmode1
141 | addressing mode: data register direct
145 lea (FPD_TEMPFP1,FPDATA),%a0
146 jmp ([0f:w,%pc,%d1.w*4])
150 .long fp_data_long, fp_data_single
152 .long fp_data_word, fp_ill
153 .long fp_data_byte, fp_ill
155 | data types that fit in an integer data register
168 jsr fp_conv_single2ext
171 | addressing mode: address register indirect
173 fp_mode_addr_indirect
176 | addressing mode: address register indirect with postincrement
178 fp_mode_addr_indirect_postinc
181 | addressing mode: address register indirect with predecrement
183 fp_mode_addr_indirect_predec
186 | addressing mode: address register/programm counter indirect
187 | with 16bit displacement
189 fp_mode_addr_indirect_disp16
192 | all other indirect addressing modes will finally end up here
194 fp_mode_addr_indirect_extmode0
197 | all pc relative addressing modes and immediate/absolute modes end up here
198 | the first ones are sent to fp_extmode0 or fp_disp16
199 | and only the latter are handled here
202 jmp ([0f:w,%pc,%d0*4])
206 .long fp_abs_short, fp_abs_long
207 .long fp_disp16, fp_extmode0
208 .long fp_immediate, fp_ill
211 | addressing mode: absolute short
216 | addressing mode: absolute long
221 | addressing mode: immediate data
225 move.w (fp_datasize,%d1.w*2),%d0
229 movem.l %d0/%d1,-(%sp)
233 1: getuser.b (%a1)+,%d1,fp_err_ua1,%a1
234 printf PDECODE,"%02x",1,%d1
236 movem.l (%sp)+,%d0/%d1
245 lea (FPD_TEMPFP1,FPDATA),%a0
246 jmp ([0f:w,%pc,%d1.w*4])
249 0: .long fp_long, fp_single
250 .long fp_ext, fp_pack
251 .long fp_word, fp_double
252 .long fp_byte, fp_ill
255 getuser.l (%a1),%d0,fp_err_ua1,%a1
260 getuser.l (%a1),%d0,fp_err_ua1,%a1
261 jsr fp_conv_single2ext
265 getuser.l (%a1)+,%d0,fp_err_ua1,%a1
270 getuser.l (%a1)+,%d0,fp_err_ua1,%a1
272 getuser.l (%a1),%d0,fp_err_ua1,%a1
278 /* not supported yet */
282 getuser.w (%a1),%d0,fp_err_ua1,%a1
288 jsr fp_conv_double2ext
292 getuser.b (%a1),%d0,fp_err_ua1,%a1
299 bfextu %d2{#22,#3},%d0
300 printf PDECODE,",fp%d\n",1,%d0
302 movem.l %a0/%a1,-(%sp)
304 bfextu %d2{#25,#7},%d0
305 jmp ([0f:w,%pc,%d0*4])
309 .long fp_fmove_mem2fp, fp_fint, fp_fsinh, fp_fintrz
310 .long fp_fsqrt, fp_ill, fp_flognp1, fp_ill
311 .long fp_fetoxm1, fp_ftanh, fp_fatan, fp_ill
312 .long fp_fasin, fp_fatanh, fp_fsin, fp_ftan
313 .long fp_fetox, fp_ftwotox, fp_ftentox, fp_ill
314 .long fp_flogn, fp_flog10, fp_flog2, fp_ill
315 .long fp_fabs, fp_fcosh, fp_fneg, fp_ill
316 .long fp_facos, fp_fcos, fp_fgetexp, fp_fgetman
317 .long fp_fdiv, fp_fmod, fp_fadd, fp_fmul
318 .long fpa_fsgldiv, fp_frem, fp_fscale, fpa_fsglmul
319 .long fp_fsub, fp_ill, fp_ill, fp_ill
320 .long fp_ill, fp_ill, fp_ill, fp_ill
321 .long fp_fsincos0, fp_fsincos1, fp_fsincos2, fp_fsincos3
322 .long fp_fsincos4, fp_fsincos5, fp_fsincos6, fp_fsincos7
323 .long fp_fcmp, fp_ill, fp_ftst, fp_ill
324 .long fp_ill, fp_ill, fp_ill, fp_ill
325 .long fp_fsmove, fp_fssqrt, fp_ill, fp_ill
326 .long fp_fdmove, fp_fdsqrt, fp_ill, fp_ill
327 .long fp_ill, fp_ill, fp_ill, fp_ill
328 .long fp_ill, fp_ill, fp_ill, fp_ill
329 .long fp_ill, fp_ill, fp_ill, fp_ill
330 .long fp_ill, fp_ill, fp_ill, fp_ill
331 .long fp_fsabs, fp_ill, fp_fsneg, fp_ill
332 .long fp_fdabs, fp_ill, fp_fdneg, fp_ill
333 .long fp_fsdiv, fp_ill, fp_fsadd, fp_fsmul
334 .long fp_fddiv, fp_ill, fp_fdadd, fp_fdmul
335 .long fp_fssub, fp_ill, fp_ill, fp_ill
336 .long fp_fdsub, fp_ill, fp_ill, fp_ill
337 .long fp_ill, fp_ill, fp_ill, fp_ill
338 .long fp_ill, fp_ill, fp_ill, fp_ill
339 .long fp_ill, fp_ill, fp_ill, fp_ill
340 .long fp_ill, fp_ill, fp_ill, fp_ill
342 | Instructions follow
344 | Move an (emulated) ROM constant
346 bfextu %d2{#27,#5},%d0
347 printf PINSTR,"fp_fmovecr #%d",1,%d0
351 lea (fp_constants,%d0*4),%a0
352 move.l #0x801cc0ff,%d0
356 fp_set_sr FPSR_EXC_INEX2 | INEX2 exception
357 1: moveq #-128,%d0 | continue with fmove
364 .long 0x00004000,0xc90fdaa2,0x2168c235 | pi
365 .extend 0,0,0,0,0,0,0,0,0,0
366 .long 0x00003ffd,0x9a209a84,0xfbcff798 | log10(2)
367 .long 0x00004000,0xadf85458,0xa2bb4a9a | e
368 .long 0x00003fff,0xb8aa3b29,0x5c17f0bc | log2(e)
369 .long 0x00003ffd,0xde5bd8a9,0x37287195 | log10(e)
370 .long 0x00000000,0x00000000,0x00000000 | 0.0
371 .long 0x00003ffe,0xb17217f7,0xd1cf79ac | 1n(2)
372 .long 0x00004000,0x935d8ddd,0xaaa8ac17 | 1n(10)
373 | read this as "1.0 * 2^0" - note the high bit in the mantissa
374 .long 0x00003fff,0x80000000,0x00000000 | 10^0
375 .long 0x00004002,0xa0000000,0x00000000 | 10^1
376 .long 0x00004005,0xc8000000,0x00000000 | 10^2
377 .long 0x0000400c,0x9c400000,0x00000000 | 10^4
378 .long 0x00004019,0xbebc2000,0x00000000 | 10^8
379 .long 0x00004034,0x8e1bc9bf,0x04000000 | 10^16
380 .long 0x00004069,0x9dc5ada8,0x2b70b59e | 10^32
381 .long 0x000040d3,0xc2781f49,0xffcfa6d5 | 10^64
382 .long 0x000041a8,0x93ba47c9,0x80e98ce0 | 10^128
383 .long 0x00004351,0xaa7eebfb,0x9df9de8e | 10^256
384 .long 0x000046a3,0xe319a0ae,0xa60e91c7 | 10^512
385 .long 0x00004d48,0xc9767586,0x81750c17 | 10^1024
386 .long 0x00005a92,0x9e8b3b5d,0xc53d5de5 | 10^2048
387 .long 0x00007525,0xc4605202,0x8a20979b | 10^4096
391 printf PINSTR,"fmove %p,%p\n",2,%a0,%a1
399 move.l #fp_finalrounding_single_fast,(%sp)
403 move.l #fp_finalrounding_single_fast,(%sp)
406 .macro fp_dosingleprec instr
407 printf PINSTR,"single "
408 move.l #fp_finalrounding_single,(%sp)
412 .macro fp_dodoubleprec instr
413 printf PINSTR,"double "
414 move.l #fp_finalrounding_double,(%sp)
419 fp_dosingleprec fp_fmove_mem2fp
422 fp_dosingleprec fp_fsqrt
425 fp_dodoubleprec fp_fmove_mem2fp
428 fp_dodoubleprec fp_fsqrt
431 fp_dosingleprec fp_fabs
434 fp_dosingleprec fp_fneg
437 fp_dodoubleprec fp_fabs
440 fp_dodoubleprec fp_fneg
443 fp_dosingleprec fp_fdiv
446 fp_dosingleprec fp_fadd
449 fp_dosingleprec fp_fmul
452 fp_dodoubleprec fp_fdiv
455 fp_dodoubleprec fp_fadd
458 fp_dodoubleprec fp_fmul
461 fp_dosingleprec fp_fsub
464 fp_dodoubleprec fp_fsub
468 getuser.l (%a0),%d0,fp_err_ua1,%a0
469 printf ,"nonstd ((%08x)=%08x)\n",2,%a0,%d0
476 | data sizes corresponding to the operand formats
478 .word 4, 4, 12, 12, 2, 8, 1, 0