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1.1 root 1: #! /bin/sh
2:
3: # $Id: m68k-insns-auto.sh,v 1.19 2003/05/16 21:48:11 fredette Exp $
4:
5: # ic/m68k/m68k-insns-auto.sh - automatically generates C code
6: # for many m68k emulation instructions:
7:
8: #
9: # Copyright (c) 2002, 2003 Matt Fredette
10: # All rights reserved.
11: #
12: # Redistribution and use in source and binary forms, with or without
13: # modification, are permitted provided that the following conditions
14: # are met:
15: # 1. Redistributions of source code must retain the above copyright
16: # notice, this list of conditions and the following disclaimer.
17: # 2. Redistributions in binary form must reproduce the above copyright
18: # notice, this list of conditions and the following disclaimer in the
19: # documentation and/or other materials provided with the distribution.
20: # 3. All advertising materials mentioning features or use of this software
21: # must display the following acknowledgement:
22: # This product includes software developed by Matt Fredette.
23: # 4. The name of the author may not be used to endorse or promote products
24: # derived from this software without specific prior written permission.
25: #
26: # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27: # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
28: # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
29: # DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
30: # INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
31: # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
32: # SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33: # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
34: # STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
35: # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36: # POSSIBILITY OF SUCH DAMAGE.
37: #
38:
39: header=false
40:
41: for option
42: do
43: case $option in
44: --header) header=true ;;
45: esac
46: done
47:
48: PROG=`basename $0`
49: cat <<EOF
50: /* automatically generated by $PROG, do not edit! */
51: _TME_RCSID("\$Id: m68k-insns-auto.sh,v 1.19 2003/05/16 21:48:11 fredette Exp $");
52:
53: EOF
54: if $header; then :; else
55: cat <<EOF
56: #include "m68k-impl.h"
57:
58: EOF
59: fi
60:
61: # permute for the three different operand sizes we need to handle:
62: for size in 8 16 32; do
63:
64: # the shifts needed to get register contents of a specific size:
65: case ${size} in
66: 8) reg_size_shift=' << 2' ;;
67: 16) reg_size_shift=' << 1' ;;
68: 32) reg_size_shift='' ;;
69: esac
70:
71: # generate the ALU functions:
72: for name in add sub cmp neg or and eor not tst move moveq clr cmpa negx addx subx cmpm; do
73:
74: # characterize each operation:
75: optype=normal ; src=op0 ; dst=op1 ; res=op1 ; arith=no ; with_x=false ; store_res=true
76: case "$name" in
77: add) op=' + ' ; arith=add ;;
78: sub) op=' - ' ; arith=sub ;;
79: cmp) op=' - ' ; arith=sub ; store_res=false ;;
80: neg) op=' - ' ; arith=sub ; dst=0 ; src=op1 ;;
81: or) op=' | ' ;;
82: and) op=' & ' ;;
83: eor) op=' ^ ' ;;
84: not) op='~ ' ; dst= ; src=op1 ;;
85: tst) op='' ; dst= ; src=op1 ; store_res=false ;;
86: move) op='' ; dst= ; src=op1 ; res=op0 ;;
87: moveq) op='' ; dst= ; src=opc8 ; if test ${size} != 32; then continue; fi ;;
88: clr) op='' ; dst= ; src=0 ;;
89: cmpa) op=' - ' ; arith=sub ; src=op0.16s32 ; store_res=false
90: if test $size != 16; then continue; fi ;;
91: negx) op=' - ' ; arith=sub ; with_x=true ; dst=0 ; src=op1 ;;
92: addx) op=' + ' ; arith=add ; optype=mathx ; with_x=true ;;
93: subx) op=' - ' ; arith=sub ; optype=mathx ; with_x=true ;;
94: cmpm) op=' - ' ; arith=sub ; optype=mathx ; store_res=false ;;
95: *) echo "$0 internal error: unknown ALU function $name" 1>&2 ; exit 1 ;;
96: esac
97:
98: # placeholder for another permutation:
99: :
100:
101: # if we're making the header, just emit a declaration:
102: if $header; then
103: echo "TME_M68K_INSN_DECL(tme_m68k_${name}${size});"
104: continue
105: fi
106:
107: # open the function:
108: echo ""
109: echo -n "/* this does a ${size}-bit \"$name "
110: case "${src}/${dst}" in *op0*) echo -n "SRC, " ;; esac
111: echo "DST\": */"
112: echo "TME_M68K_INSN(tme_m68k_${name}${size})"
113: echo "{"
114:
115: # declare our locals:
116: if test $name = cmpa; then size=32; fi
117: echo -n " tme_uint${size}_t res"
118: case "${src}/${dst}" in *op0*) echo -n ", op0" ;; esac
119: case "${src}/${dst}" in *op1*) echo -n ", op1" ;; esac
120: echo ";"
121: echo " tme_uint8_t flags;"
122:
123: # load the operand(s):
124: echo ""
125: echo " /* load the operand(s): */"
126: case ${optype} in
127: mathx)
128: echo " unsigned int function_code = TME_M68K_FUNCTION_CODE_DATA(ic);"
129:
130: # NB: in my 68000 Programmer's Manual, the description
131: # of subx is a little backwards from addx and cmpm. in
132: # subx, the reg field at bits 0-2 is called the "x"
133: # field, where in addx and cmpm it's called the "y"
134: # field, and similarly for the reg field at bits 9-11.
135: # fortunately, the meanings of the two reg fields is
136: # always the same despite this - the reg field at bits
137: # 0-2 always identifies the source operand, and the
138: # reg field at bits 9-11 always identifies the
139: # destination operand:
140: echo " int ireg_src = TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 0, 3);"
141: echo " int ireg_dst = TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 9, 3);"
142:
143: # the stack pointer must always be adjusted by a multiple of two.
144: # assuming ireg < 8, ((ireg + 1) >> 3) == 1 iff ireg == 7, meaning %a7:
145: echo -n " tme_uint32_t ireg_src_adjust = sizeof(tme_uint${size}_t)";
146: if test ${size} = 8; then
147: echo -n " + ((ireg_src + 1) >> 3)"
148: fi
149: echo ";"
150: echo -n " tme_uint32_t ireg_dst_adjust = sizeof(tme_uint${size}_t)";
151: if test ${size} = 8; then
152: echo -n " + ((ireg_dst + 1) >> 3)"
153: fi
154: echo ";"
155:
156: case ${name} in
157:
158: # cmpm always uses memory and is always postincrement:
159: cmpm)
160: echo ""
161: echo " TME_M68K_INSN_CANFAULT;"
162: echo ""
163: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
164: echo " ic->_tme_m68k_ea_function_code = function_code;"
165: echo " ic->_tme_m68k_ea_address = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ireg_dst);"
166: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ireg_dst) += ireg_dst_adjust;"
167: echo " }"
168: echo " tme_m68k_read_memx${size}(ic);"
169: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
170: echo " ic->_tme_m68k_ea_function_code = function_code;"
171: echo " ic->_tme_m68k_ea_address = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ireg_src);"
172: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ireg_src) += ireg_src_adjust;"
173: echo " }"
174: echo " tme_m68k_read_mem${size}(ic, TME_M68K_IREG_MEMY${size});"
175: echo " ${dst} = ic->tme_m68k_ireg_memx${size};"
176: echo " ${src} = ic->tme_m68k_ireg_memy${size};"
177: ;;
178:
179: # addx and subx use either registers or memory. if they use memory,
180: # they always predecrement:
181: addx|subx)
182: echo " tme_uint16_t memory;"
183: echo ""
184: echo " memory = (TME_M68K_INSN_OPCODE & TME_BIT(3));"
185: echo " if (memory) {"
186: echo " TME_M68K_INSN_CANFAULT;"
187: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
188: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ireg_dst) -= ireg_dst_adjust;"
189: echo " ic->_tme_m68k_ea_function_code = function_code;"
190: echo " ic->_tme_m68k_ea_address = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ireg_dst);"
191: echo " }"
192: echo " tme_m68k_read_memx${size}(ic);"
193: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
194: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ireg_src) -= ireg_src_adjust;"
195: echo " ic->_tme_m68k_ea_function_code = function_code;"
196: echo " ic->_tme_m68k_ea_address = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ireg_src);"
197: echo " }"
198: echo " tme_m68k_read_mem${size}(ic, TME_M68K_IREG_MEMY${size});"
199: echo " ${dst} = ic->tme_m68k_ireg_memx${size};"
200: echo " ${src} = ic->tme_m68k_ireg_memy${size};"
201: echo " }"
202: echo " else {"
203: echo " ${src} = ic->tme_m68k_ireg_uint${size}((TME_M68K_IREG_D0 + ireg_src)${reg_size_shift});"
204: echo " ${dst} = ic->tme_m68k_ireg_uint${size}((TME_M68K_IREG_D0 + ireg_dst)${reg_size_shift});"
205: echo " }"
206: ;;
207: *) echo "$0 internal error: unknown mathx ${name}" 1>&2 ; exit 1 ;;
208: esac
209: ;;
210: normal)
211: for which in src dst; do
212: eval 'what=$'${which}
213: case "x${what}" in
214: x|x0) ;;
215: xop[01].16s32)
216: what=`echo ${what} | sed -e 's/\..*//'`
217: eval ${which}"=${what}"
218: echo " ${what} = (tme_uint32_t) ((tme_int32_t) *((tme_int16_t *) _${what}));"
219: ;;
220: xop[01])
221: echo " ${what} = *((tme_uint${size}_t *) _${what});"
222: ;;
223: xopc8)
224: eval ${which}"='TME_EXT_S8_U${size}((tme_int8_t) (TME_M68K_INSN_OPCODE & 0xff))'"
225: ;;
226: *) echo "$0 internal error: unknown what ${what}" 1>&2 ; exit 1 ;;
227: esac
228: done
229: ;;
230: *) echo "$0 internal error: unknown optype ${optype}" 1>&2 ; exit 1 ;;
231: esac
232:
233: # perform the operation:
234: echo ""
235: echo " /* perform the operation: */"
236: echo -n " res = ${dst}${op}${src}"
237: if $with_x; then
238: echo -n "${op}((ic->tme_m68k_ireg_ccr / TME_M68K_FLAG_X) & 1)"
239: fi
240: echo ";"
241:
242: # store the result:
243: if $store_res; then
244: echo ""
245: echo " /* store the result: */"
246: case ${optype} in
247: mathx)
248: echo " if (memory) {"
249: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
250: echo " ic->tme_m68k_ireg_memx${size} = res;"
251: echo " ic->_tme_m68k_ea_function_code = function_code;"
252: echo " ic->_tme_m68k_ea_address = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ireg_dst);"
253: echo " }"
254: echo " tme_m68k_write_memx${size}(ic);"
255: echo " }"
256: echo " else {"
257: echo " ic->tme_m68k_ireg_uint${size}((TME_M68K_IREG_D0 + ireg_dst)${reg_size_shift}) = res;"
258: echo " }"
259: ;;
260: normal)
261: echo " *((tme_uint${size}_t *) _${res}) = res;"
262: ;;
263: *) echo "$0 internal error: unknown optype ${optype}" 1>&2 ; exit 1 ;;
264: esac
265: fi
266:
267: # start the status flags, maybe preserving X:
268: echo ""
269: echo " /* set the flags: */"
270: case "${name}:${arith}" in
271: cmp*|*:no)
272: flag_x=
273: ;;
274: *)
275: flag_x=" | TME_M68K_FLAG_X"
276: ;;
277: esac
278:
279: # set N. we cast to tme_uint8_t as soon as we know the
280: # bit we want is within the range of the type, to try
281: # to affect the generated assembly:
282: echo " flags = ((tme_uint8_t) (((tme_uint${size}_t) res) >> (${size} - 1))) * TME_M68K_FLAG_N;"
283:
284: # set Z:
285: if $with_x; then
286: echo " if (res == 0) flags |= (ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_Z);"
287: else
288: echo " if (res == 0) flags |= TME_M68K_FLAG_Z;"
289: fi
290:
291: # set V and C and maybe X:
292: case $arith in
293: add)
294: case $size in
295: 8) ones="0xff" ;;
296: 16) ones="0xffff" ;;
297: 32) ones="0xffffffff" ;;
298: esac
299: # if the operands are the same sign, and the result has
300: # a different sign, set V. we cast to tme_uint8_t as
301: # soon as we know the bit we want is within the range
302: # of the type, to try to affect the generated assembly:
303: echo " flags |= ((tme_uint8_t) (((${src} ^ ${dst} ^ ${ones}) & (${dst} ^ res)) >> (${size} - 1))) * TME_M68K_FLAG_V;"
304: # if src is greater than the logical inverse of dst, set C:
305: echo -n " if (${src} > (${dst} ^ ${ones})"
306: if $with_x; then
307: echo -n " || (${src} == (${dst} ^ ${ones}) && (ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_X))"
308: fi
309: echo ") flags |= TME_M68K_FLAG_C${flag_x};"
310: ;;
311: sub)
312: # if the operands are different signs, and the result has
313: # a different sign from the first operand, set V. we
314: # cast to tme_uint8_t as soon as we know the bit we want
315: # is within the range of the type, to try to affect the
316: # generated assembly:
317: echo " flags |= ((tme_uint8_t) (((${src} ^ ${dst}) & (${dst} ^ res)) >> (${size} - 1))) * TME_M68K_FLAG_V;"
318: # if src is greater than dst, set C:
319: echo -n " if (${src} > ${dst}"
320: if $with_x; then
321: echo -n " || (${src} == ${dst} && (ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_X))"
322: fi
323: echo ") flags |= TME_M68K_FLAG_C${flag_x};"
324: ;;
325: no) ;;
326: esac
327:
328: # preserve X:
329: if test "x${flag_x}" = x; then
330: echo " flags |= (ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_X);"
331: fi
332:
333: # set the flags:
334: echo " ic->tme_m68k_ireg_ccr = flags;"
335:
336: # done:
337: echo ""
338: echo " TME_M68K_INSN_OK;"
339: echo "}"
340:
341: if test $name = cmpa; then size=16; fi
342: done
343:
344: # generate the address math functions:
345: for name in suba adda movea; do
346:
347: # the address math functions don't need an 8-bit version:
348: if test $size = 8; then continue; fi
349:
350: # if we're making the header, just emit a declaration:
351: if $header; then
352: echo "TME_M68K_INSN_DECL(tme_m68k_${name}${size});"
353: continue
354: fi
355:
356: echo ""
357: echo "/* the ${name} function on a ${size}-byte EA: */"
358: echo "TME_M68K_INSN(tme_m68k_${name}${size})"
359: echo "{"
360: case $name in
361: suba) op='-' ; src="_op0" ; dst="_op1" ;;
362: adda) op='+' ; src="_op0" ; dst="_op1" ;;
363: movea) op='' ; src="_op1" ; dst="_op0" ;;
364: esac
365: echo " *((tme_int32_t *) ${dst}) ${op}= *((tme_int${size}_t *) ${src});"
366: echo " TME_M68K_INSN_OK;"
367: echo "}"
368: done
369:
370: # generate the bit functions:
371: for name in btst bchg bclr bset; do
372:
373: # the bit functions don't need a 16-bit version:
374: if test $size = 16; then continue; fi
375:
376: # if we're making the header, just emit a declaration:
377: if $header; then
378: echo "TME_M68K_INSN_DECL(tme_m68k_${name}${size});"
379: continue
380: fi
381:
382: echo ""
383: echo "/* the ${name} function on a ${size}-byte EA: */"
384: echo "TME_M68K_INSN(tme_m68k_${name}${size})"
385: echo "{"
386: echo " tme_uint${size}_t value, bit;"
387: echo " bit = _TME_BIT(tme_uint${size}_t, TME_M68K_INSN_OP0(tme_uint8_t) & (${size} - 1));"
388: echo " value = TME_M68K_INSN_OP1(tme_uint${size}_t);"
389: echo " if (value & bit) {"
390: echo " ic->tme_m68k_ireg_ccr &= ~TME_M68K_FLAG_Z;"
391: echo " }"
392: echo " else {"
393: echo " ic->tme_m68k_ireg_ccr |= TME_M68K_FLAG_Z;"
394: echo " }"
395: case ${name} in
396: btst) ;;
397: bchg) echo " TME_M68K_INSN_OP1(tme_uint${size}_t) = value ^ bit;" ;;
398: bclr) echo " TME_M68K_INSN_OP1(tme_uint${size}_t) = value & ~bit;" ;;
399: bset) echo " TME_M68K_INSN_OP1(tme_uint${size}_t) = value | bit;" ;;
400: esac
401: echo " TME_M68K_INSN_OK;"
402: echo "}"
403: done
404:
405: # generate the shift/rotate functions:
406: for func in as ls ro rox; do
407: for dir in l r; do
408: name="${func}${dir}"
409:
410: # if we're making the header, just emit a declaration:
411: if $header; then
412: echo "TME_M68K_INSN_DECL(tme_m68k_${name}${size});"
413: continue
414: fi
415:
416: echo ""
417: echo "/* the ${name} function on a ${size}-byte EA: */"
418: echo "TME_M68K_INSN(tme_m68k_${name}${size})"
419: echo "{"
420: echo " unsigned int count;"
421: sign=u
422: case "${name}" in
423: asr) sign= ;;
424: asl) echo " tme_uint${size}_t sign_bits;" ;;
425: rox[lr]) echo " tme_uint8_t xbit;" ;;
426: *) ;;
427: esac
428: echo " tme_${sign}int${size}_t res;"
429: echo " tme_uint8_t flags;"
430: echo ""
431: echo " /* get the count and operand: */"
432: echo " count = TME_M68K_INSN_OP0(tme_uint8_t) & 63;"
433: echo " res = TME_M68K_INSN_OP1(tme_${sign}int${size}_t);"
434:
435: echo ""
436: echo " /* generate the X, V, and C flags assuming the count is zero: */"
437: echo " flags = ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_X;"
438: case "${name}" in
439: rox[lr])
440: echo " xbit = (flags / TME_M68K_FLAG_X);"
441: echo " flags |= (xbit * TME_M68K_FLAG_C);"
442: ;;
443: esac
444:
445: echo ""
446: echo " /* if the count is nonzero, update the result and"
447: echo " generate the X, V, and C flags: */"
448: echo " if (count > 0) {"
449: case "${name}" in
450: [al]sr)
451: echo " if (63 > SHIFTMAX_INT${size}_T"
452: echo " && count > ${size}) {"
453: echo " res = 0;"
454: echo " }"
455: echo " res >>= (count - 1);"
456: echo " flags = (res & 1);"
457: echo " flags *= TME_M68K_FLAG_C;"
458: echo " flags |= (flags * TME_M68K_FLAG_X);"
459: echo " res >>= 1;"
460: ;;
461: [al]sl)
462: if test ${name} = asl; then
463: echo ""
464: echo " /* we need to see how the sign of the result will change during"
465: echo " shifting in order to generate V."
466: echo ""
467: echo " in general, the idea is to get all of the bits that will ever"
468: echo " appear in the sign position into sign_bits; if sign_bits is"
469: echo " all-bits-one or all-bits zero, clear V, else set V. a good trick"
470: echo " is that ((sign_bits + 1) & sign_bits) is nonzero iff all of the"
471: echo " bits in sign_bits are the same."
472: echo ""
473: echo " start by loading all of the operand into sign_bits."
474: echo ""
475: echo " if the shift count is exactly ${size} - 1, then all of the bits"
476: echo " of the operand will appear in the sign position."
477: echo ""
478: echo " if the shift count is less than ${size} - 1, then some of the"
479: echo " less significant bits of the operand will never appear in the"
480: echo " sign position, so we can shift them off of sign_bits now."
481: echo ""
482: echo " if the shift count is greater than ${size} - 1, then all of the"
483: echo " bits in the operand, plus at least one zero bit, will appear in"
484: echo " the sign position. the only way that the sign bit will never"
485: echo " change during the shift is if the operand was zero to begin with."
486: echo " we need to change sign_bits such that ((sign_bits + 1) &"
487: echo " sign_bits) will be zero iff the operand was zero to begin with."
488: echo " the magic below does just that: */"
489: echo " sign_bits = res;"
490: fi
491: echo " if (63 > SHIFTMAX_INT${size}_T"
492: echo " && count > ${size}) {"
493: echo " res = 0;"
494: echo " }"
495: echo " res <<= (count - 1);"
496: echo " flags = (res >> (${size} - 1));"
497: echo " flags *= TME_M68K_FLAG_C;"
498: echo " flags |= (flags * TME_M68K_FLAG_X);"
499: echo " res <<= 1;"
500: if test ${name} = asl; then
501: echo " if (count != ${size} - 1) {"
502: echo " if (count < ${size}) {"
503: echo " sign_bits >>= ((${size} - 1) - count);"
504: echo " }"
505: echo " else {"
506: echo " sign_bits |= (sign_bits << 1);"
507: echo " sign_bits &= -2;"
508: echo " }"
509: echo " }"
510: echo " if ((sign_bits + 1) & sign_bits) {"
511: echo " flags |= TME_M68K_FLAG_V;"
512: echo " }"
513: fi
514: ;;
515: ro[lr])
516: echo " count &= (${size} - 1);"
517: if test $dir = l; then
518: echo " res = (res << count) | (res >> (${size} - count));"
519: echo " flags |= ((res & 1) * TME_M68K_FLAG_C);"
520: else
521: echo " res = (res << (${size} - count)) | (res >> count);"
522: echo " flags |= ((res >> (${size} - 1)) * TME_M68K_FLAG_C);"
523: fi
524: ;;
525: rox[lr])
526: echo " count %= (${size} + 1);"
527: echo " flags = xbit;"
528: echo " if (count > 0) {"
529: if test $dir = l; then
530: echo " flags = (res >> (${size} - count)) & 1;"
531: echo " if (${size} > SHIFTMAX_INT${size}_T"
532: echo " && count == ${size}) {"
533: echo " res = 0 | (xbit << (${size} - 1)) | (res >> ((${size} + 1) - ${size}));"
534: echo " }"
535: echo " else if (${size} > SHIFTMAX_INT${size}_T"
536: echo " && count == 1) {"
537: echo " res = (res << 1) | (xbit << (1 - 1)) | 0;"
538: echo " }"
539: echo " else {"
540: echo " res = (res << count) | (xbit << (count - 1)) | (res >> ((${size} + 1) - count));"
541: echo " }"
542: else
543: echo " flags = (res >> (count - 1)) & 1;"
544: echo " if (${size} > SHIFTMAX_INT${size}_T"
545: echo " && count == ${size}) {"
546: echo " res = (res << ((${size} + 1) - ${size})) | (xbit << (${size} - ${size})) | 0;"
547: echo " }"
548: echo " else if (${size} > SHIFTMAX_INT${size}_T"
549: echo " && count == 1) {"
550: echo " res = 0 | (xbit << (${size} - 1)) | (res >> 1);"
551: echo " }"
552: echo " else {"
553: echo " res = (res << ((${size} + 1) - count)) | (xbit << (${size} - count)) | (res >> count);"
554: echo " }"
555: fi
556: echo " }"
557: echo " flags *= TME_M68K_FLAG_C;"
558: echo " flags |= (flags * TME_M68K_FLAG_X);"
559: ;;
560: esac
561: echo " }"
562:
563: echo ""
564: echo " /* store the result: */"
565: echo " TME_M68K_INSN_OP1(tme_${sign}int${size}_t) = res;"
566:
567: echo ""
568: echo " /* generate the N flag. we cast to tme_uint8_t as soon as we"
569: echo " know the bit we want is within the range of the type, to try"
570: echo " to affect the generated assembly: */"
571: echo " flags |= ((tme_uint8_t) (((tme_uint${size}_t) res) >> (${size} - 1))) * TME_M68K_FLAG_N;"
572:
573: echo ""
574: echo " /* generate the Z flag: */"
575: echo " if (res == 0) flags |= TME_M68K_FLAG_Z;"
576:
577: echo ""
578: echo " /* store the flags: */"
579: echo " ic->tme_m68k_ireg_ccr = flags;"
580: echo " TME_M68K_INSN_OK;"
581: echo "}"
582: done
583: done
584:
585: # movep_rm, movep_mr, movem_rm, and movem_mr:
586: for name in rm mr; do
587:
588: # movep and movem don't need 8-bit versions:
589: if test ${size} = 8; then continue; fi
590:
591: # if we're making the header, just emit declarations:
592: if $header; then
593: echo "TME_M68K_INSN_DECL(tme_m68k_movep_${name}${size});"
594: echo "TME_M68K_INSN_DECL(tme_m68k_movem_${name}${size});"
595: continue
596: fi
597:
598: # emit the movep function:
599: echo ""
600: echo "/* the movep_${name} function on a ${size}-bit dreg: */"
601: echo "TME_M68K_INSN(tme_m68k_movep_${name}${size})"
602: echo "{"
603: echo " unsigned int function_code;"
604: echo " tme_uint32_t linear_address;"
605: if test $name = rm; then
606: echo " tme_uint${size}_t value;"
607: fi
608: echo " int dreg;"
609: echo ""
610: echo " TME_M68K_INSN_CANFAULT;"
611: echo ""
612: echo " function_code = TME_M68K_FUNCTION_CODE_DATA(ic);"
613: echo " linear_address = TME_M68K_INSN_OP1(tme_uint32_t);"
614: echo " linear_address += (tme_int32_t) ((tme_int16_t) TME_M68K_INSN_SPECOP);"
615: echo " dreg = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 9, 3);"
616:
617: # set value:
618: if test $name = rm; then
619: echo " value = ic->tme_m68k_ireg_uint${size}(dreg${reg_size_shift});"
620: value="value"
621: else
622: value="ic->tme_m68k_ireg_uint${size}(dreg${reg_size_shift})"
623: fi
624:
625: # transfer the bytes:
626: pos=${size}
627: while test $pos != 0; do
628: pos=`expr ${pos} - 8`
629: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
630: echo " ic->_tme_m68k_ea_function_code = function_code;"
631: echo " ic->_tme_m68k_ea_address = linear_address;"
632: if test $name = rm; then
633: echo " ic->tme_m68k_ireg_memx8 = TME_FIELD_EXTRACTU(${value}, ${pos}, 8);"
634: echo " }"
635: echo " tme_m68k_write_memx8(ic);"
636: else
637: echo " }"
638: echo " tme_m68k_read_memx8(ic);"
639: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
640: echo " TME_FIELD_DEPOSIT${size}(${value}, ${pos}, 8, ic->tme_m68k_ireg_memx8);"
641: echo " }"
642: fi
643: echo " linear_address += 2;"
644: done
645:
646: echo " TME_M68K_INSN_OK;"
647: echo "}"
648:
649: # emit the movem function:
650: echo ""
651: echo "/* the movem_${name} function on ${size}-bit registers: */"
652: echo "TME_M68K_INSN(tme_m68k_movem_${name}${size})"
653: echo "{"
654: echo " int ireg, direction;"
655: echo " tme_uint16_t mask, bit;"
656: echo " unsigned int ea_mode;"
657: echo " tme_uint32_t addend;"
658:
659: echo ""
660: echo " TME_M68K_INSN_CANFAULT;"
661: echo ""
662: echo " /* figure out what direction to move in, and where to start from: */"
663: echo " ea_mode = TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 3, 3);"
664: echo " direction = 1;"
665: echo " ireg = TME_M68K_IREG_D0;"
666: if test $name = rm; then
667: echo " if (ea_mode == 4) {"
668: echo " direction = -1;"
669: echo " ireg = TME_M68K_IREG_A7;"
670: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
671: echo " ic->_tme_m68k_ea_address -= sizeof(tme_uint${size}_t);"
672: echo " }"
673: echo " }"
674: fi
675: echo " addend = (tme_uint32_t) (direction * sizeof(tme_uint${size}_t));"
676:
677: echo ""
678: echo " /* do the transfer: */"
679: echo " mask = TME_M68K_INSN_SPECOP;"
680: echo " for (bit = 1; bit != 0; bit <<= 1) {"
681: echo " if (mask & bit) {"
682: if test $name = rm; then
683: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
684: echo " ic->tme_m68k_ireg_memx${size} = ic->tme_m68k_ireg_uint${size}(ireg${reg_size_shift});"
685: echo " }"
686: echo " tme_m68k_write_memx${size}(ic);"
687: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
688: else
689: echo " tme_m68k_read_memx${size}(ic);"
690: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
691: echo -n " ic->tme_m68k_ireg_uint32(ireg) = "
692: if test $size = 32; then
693: echo "ic->tme_m68k_ireg_memx${size};"
694: else
695: echo "TME_EXT_S${size}_U32((tme_int${size}_t) ic->tme_m68k_ireg_memx${size});"
696: fi
697: fi
698: echo " ic->_tme_m68k_ea_address += addend;"
699: echo " }"
700: echo " }"
701: echo " ireg += direction;"
702: echo " }"
703: echo ""
704:
705: # for the predecrement and postincrement modes, update the
706: # address register:
707: if test $name = rm; then
708: echo " /* if this is the predecrement mode, update the address register: */"
709: echo " if (ea_mode == 4) {"
710: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0"
711: echo " + TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 0, 3))"
712: echo " = (ic->_tme_m68k_ea_address + sizeof(tme_uint${size}_t));"
713: echo " }"
714: else
715: echo " /* if this is the postincrement mode, update the address register: */"
716: echo " if (ea_mode == 3) {"
717: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0"
718: echo " + TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 0, 3))"
719: echo " = ic->_tme_m68k_ea_address;"
720: echo " }"
721: fi
722:
723: echo " TME_M68K_INSN_OK;"
724: echo "}"
725: done
726:
727: # chk32 and chk16:
728: if test $size != 8; then
729:
730: # if we're making the header, just emit a declaration:
731: if $header; then
732: echo "TME_M68K_INSN_DECL(tme_m68k_chk${size});"
733: else
734: echo ""
735: echo "/* chk${size}: */"
736: echo "TME_M68K_INSN(tme_m68k_chk${size})"
737: echo "{"
738: echo " if (*((tme_int${size}_t *) _op0) < 0) {"
739: echo " ic->tme_m68k_ireg_ccr |= TME_M68K_FLAG_N;"
740: echo " ic->tme_m68k_ireg_pc = ic->tme_m68k_ireg_pc_next;"
741: echo " TME_M68K_INSN_EXCEPTION(TME_M68K_EXCEPTION_GROUP2(6));"
742: echo " }"
743: echo " if (*((tme_int${size}_t *) _op0) > *((tme_int${size}_t *) _op1)) {"
744: echo " ic->tme_m68k_ireg_ccr &= ~TME_M68K_FLAG_N;"
745: echo " ic->tme_m68k_ireg_pc = ic->tme_m68k_ireg_pc_next;"
746: echo " TME_M68K_INSN_EXCEPTION(TME_M68K_EXCEPTION_GROUP2(6));"
747: echo " }"
748: echo " TME_M68K_INSN_OK;"
749: echo "}"
750: fi
751: fi
752:
753: # cas and cas2:
754: for name in cas cas2_; do
755:
756: # cas2 doesn't do byte operands:
757: buffers=x
758: if test $name = cas2_; then
759: if test $size = 8; then continue; fi
760: buffers="x y"
761: fi
762:
763: if $header; then
764: echo "TME_M68K_INSN_DECL(tme_m68k_${name}${size});"
765: else
766: echo ""
767: echo "/* ${name}${size}: */"
768: echo "TME_M68K_INSN(tme_m68k_${name}${size})"
769: echo "{"
770: echo " struct tme_m68k_tlb *tlb;"
771: echo " int ireg_dc, ireg_du;"
772: echo " int do_write;"
773: echo " tme_uint16_t specopx = ic->_tme_m68k_insn_specop;"
774: if test $name = cas2_; then
775: echo " tme_uint16_t specopy = ic->_tme_m68k_insn_specop2;"
776: echo " tme_uint32_t addrx;"
777: echo " tme_uint32_t addry;"
778: echo ""
779: echo " /* get the function code and addresses we'll be dealing with: */"
780: echo " ic->_tme_m68k_ea_function_code = TME_M68K_FUNCTION_CODE_DATA(ic);"
781: echo " addrx = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_D0"
782: echo " + TME_FIELD_EXTRACTU(specopx, 12, 4));"
783: echo " addry = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_D0"
784: echo " + TME_FIELD_EXTRACTU(specopy, 12, 4));"
785: fi
786: echo ""
787: echo " /* start the read/modify/write cycle: */"
788: echo " tlb = tme_m68k_rmw_start(ic);"
789: echo " if (tlb == NULL) {"
790: echo " TME_M68K_INSN_OK;"
791: echo " }"
792: echo ""
793: echo " /* read: */"
794: for buffer in $buffers; do
795: if test $name = cas2_; then
796: echo " ic->_tme_m68k_ea_address = addr${buffer};"
797: fi
798: echo " tme_m68k_read${size}(ic, tlb,"
799: echo " &ic->_tme_m68k_ea_function_code,"
800: echo " &ic->_tme_m68k_ea_address,"
801: echo " &ic->tme_m68k_ireg_mem${buffer}${size},"
802: echo " TME_M68K_BUS_CYCLE_RMW);"
803: done
804:
805: echo ""
806: echo " /* modify: */"
807: for buffer in $buffers; do
808: i=
809: if test $buffer = y; then
810: echo " if (ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_Z) {"
811: i=" "
812: fi
813: echo "${i} ireg_dc = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(specop${buffer}, 0, 3);"
814: echo "${i} tme_m68k_cmp${size}(ic, &ic->tme_m68k_ireg_uint${size}(ireg_dc), &ic->tme_m68k_ireg_mem${buffer}${size});"
815: if test $buffer = y; then
816: echo " }"
817: fi
818: done
819:
820: echo ""
821: echo " /* write: */"
822: echo " if (ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_Z) {"
823: for buffer in $buffers; do
824: if test $name = cas2_; then
825: echo " ic->_tme_m68k_ea_address = addr${buffer};"
826: fi
827: echo " ireg_du = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(specop${buffer}, 6, 3);"
828: echo " ic->tme_m68k_ireg_mem${buffer}${size} = ic->tme_m68k_ireg_uint${size}(ireg_du);"
829: echo " tme_m68k_write${size}(ic, tlb,"
830: echo " &ic->_tme_m68k_ea_function_code,"
831: echo " &ic->_tme_m68k_ea_address,"
832: echo " &ic->tme_m68k_ireg_mem${buffer}${size},"
833: echo " TME_M68K_BUS_CYCLE_RMW);"
834: done
835: echo " }"
836: echo " else {"
837: echo " /* XXX the 68040 always does a write to finish its cycle: */"
838: echo " do_write = FALSE;"
839: for buffer in $buffers; do
840: echo " ireg_dc = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(specop${buffer}, 0, 3);"
841: echo -n " if (do_write"
842: if test $name = cas2_; then
843: echo ""
844: echo " && ic->tme_m68k_ireg_mem${buffer}${size} != ic->tme_m68k_ireg_uint${size}(ireg_dc)) {"
845: echo " ic->_tme_m68k_ea_address = addr${buffer};"
846: else
847: echo ") {"
848: fi
849: echo " tme_m68k_write${size}(ic, tlb,"
850: echo " &ic->_tme_m68k_ea_function_code,"
851: echo " &ic->_tme_m68k_ea_address,"
852: echo " &ic->tme_m68k_ireg_mem${buffer}${size},"
853: echo " TME_M68K_BUS_CYCLE_RMW);"
854: echo " do_write = FALSE;"
855: echo " }"
856: echo " ic->tme_m68k_ireg_uint${size}(ireg_dc) = ic->tme_m68k_ireg_mem${buffer}${size};"
857: done
858: echo " }"
859: echo ""
860: echo " /* finish the read/modify/write cycle: */"
861: echo " tme_m68k_rmw_finish(ic, tlb);"
862: echo ""
863: echo " TME_M68K_INSN_OK;"
864: echo "}"
865: fi
866: done
867:
868: # moves:
869: if $header; then
870: echo "TME_M68K_INSN_DECL(tme_m68k_moves${size});"
871: else
872: echo ""
873: echo "/* moves${size}: */"
874: echo "TME_M68K_INSN(tme_m68k_moves${size})"
875: echo "{"
876: echo " int ireg;"
877: echo " ireg = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(TME_M68K_INSN_SPECOP, 12, 4);"
878: echo " if (TME_M68K_INSN_SPECOP & TME_BIT(11)) {"
879: echo " ic->tme_m68k_ireg_memx${size} = ic->tme_m68k_ireg_uint${size}(ireg${reg_size_shift});"
880: echo " }"
881: echo " else {"
882: if test ${size} != 32; then
883: echo " if (ireg >= TME_M68K_IREG_A0) {"
884: echo " ic->tme_m68k_ireg_uint32(ireg) = "
885: echo " TME_EXT_S${size}_U32((tme_int${size}_t) ic->tme_m68k_ireg_memx${size});"
886: echo " }"
887: echo " else"
888: echo -n " "
889: fi
890: echo " ic->tme_m68k_ireg_uint${size}(ireg${reg_size_shift}) = ic->tme_m68k_ireg_memx${size};"
891: echo " }"
892: echo " TME_M68K_INSN_OK;"
893: echo "}"
894: fi
895: done
896:
897: # generate the memory read and write functions:
898:
899: # permute on size:
900: for size in 8 16 32 any; do
901:
902: # permute on read or write:
903: for name in read write; do
904: capname=`echo $name | tr a-z A-Z`
905: if test $name = read; then
906: lockname="rd"
907: from="from"
908: else
909: lockname="wr"
910: from="to"
911: fi
912:
913: # permute on the special-purpose what:
914: for what in memx mem inst stack; do
915:
916: # placeholder for another permutation:
917: :
918:
919: # dispatch on the size:
920: _first=_first ; _last=_last
921: case "$size" in
922: 8) _first= ; _last= ;;
923: esac
924:
925: # set up the details of each special purpose:
926: rval="void"
927: args=""
928: args_proto=""
929: fc=""
930: addr=""
931: count=""
932: tlb="TME_M68K_TLB_ENTRY(ic, function_code, linear_address${_first})"
933: flags="TME_M68K_BUS_CYCLE_NORMAL"
934: case "${name}-${what}-${size}" in
935: *-memx-8 | *-memx-16 | *-memx-32)
936: action="${name}_${what}${size}"
937: fcptr="&ic->_tme_m68k_ea_function_code"
938: addrptr="&ic->_tme_m68k_ea_address"
939: reg="ic->tme_m68k_ireg_memx${size}"
940: regptr="&${reg}"
941: ;;
942: *-mem-any)
943: action="${name}_${what}"
944: args_proto=", tme_uint8_t *, unsigned int"
945: args=", tme_uint8_t *buffer, unsigned int count"
946: fcptr="&ic->_tme_m68k_ea_function_code"
947: addrptr="&ic->_tme_m68k_ea_address"
948: reg=
949: regptr="buffer"
950: ;;
951: *-mem-8 | *-mem-16 | *-mem-32)
952: action="${name}_${what}${size}"
953: args_proto=", int"
954: args="${args_proto} ireg"
955: fcptr="&ic->_tme_m68k_ea_function_code"
956: addrptr="&ic->_tme_m68k_ea_address"
957: reg="ic->tme_m68k_ireg_uint${size}(ireg)"
958: regptr="&${reg}"
959: ;;
960: read-stack-16 | read-stack-32)
961: action="pop${size}"
962: args_proto=", tme_uint${size}_t *"
963: args="${args_proto}_value"
964: fc="TME_M68K_FUNCTION_CODE_DATA(ic)"
965: addrptr="&ic->tme_m68k_ireg_a7"
966: regptr="_value"
967: reg="*${regptr}"
968: ;;
969: write-stack-16 | write-stack-32)
970: action="push${size}"
971: args_proto=", tme_uint${size}_t "
972: args="${args_proto}value"
973: fc="TME_M68K_FUNCTION_CODE_DATA(ic)"
974: addr="ic->tme_m68k_ireg_a7 - sizeof(tme_uint${size}_t)"
975: reg="value"
976: regptr="&${reg}"
977: ;;
978: read-inst-16 | read-inst-32)
979: rval="tme_uint${size}_t"
980: action="fetch${size}"
981: args_proto=", tme_uint32_t"
982: args="${args_proto} pc"
983: fc="TME_M68K_FUNCTION_CODE_PROGRAM(ic)"
984: addrptr="&pc"
985: tlb="TME_ATOMIC_READ(struct tme_m68k_tlb *, ic->_tme_m68k_itlb)";
986: flags="TME_M68K_BUS_CYCLE_FETCH"
987: ;;
988: *)
989: continue
990: ;;
991: esac
992:
993: # if we're making the header, just emit a declaration:
994: if $header; then
995: echo "${rval} tme_m68k_${action} _TME_P((struct tme_m68k *${args_proto}));"
996: continue
997: fi
998:
999: # start the function:
1000: echo ""
1001: echo "/* this ${name}s a ${size}-bit ${what} value: */"
1002: echo "${rval}"
1003: echo "tme_m68k_${action}(struct tme_m68k *ic${args}) "
1004: echo "{"
1005:
1006: # our locals:
1007: echo -n " unsigned int function_code = "
1008: if test "x${fc}" != x; then
1009: echo "${fc};"
1010: fc="function_code"
1011: fcptr="&function_code"
1012: else
1013: fc=`echo ${fcptr} | sed -e 's,^&,,'`
1014: echo "${fc};"
1015: fi
1016: echo -n " tme_uint32_t linear_address${_first} = "
1017: if test "x${addr}" != x; then
1018: echo "${addr};"
1019: addr="linear_address${_first}"
1020: addrptr="&linear_address${_first}"
1021: else
1022: addr=`echo ${addrptr} | sed -e 's,^&,,'`
1023: echo "${addr};"
1024: fi
1025: if test "x${count}" = x; then
1026: if test $size = any; then count=count; else count="sizeof(tme_uint${size}_t)"; fi
1027: fi
1028: if test x$_last != x; then
1029: echo " tme_uint32_t linear_address${_last} = linear_address_first + ${count} - 1;";
1030: fi
1031: echo " struct tme_m68k_tlb *tlb = ${tlb};"
1032: case "$what" in
1033: inst)
1034: echo " unsigned int insn_buffer_off = TME_ALIGN(ic->_tme_m68k_insn_buffer_off, sizeof(tme_uint${size}_t));"
1035: regptr="((tme_uint${size}_t *) &ic->_tme_m68k_insn_buffer[insn_buffer_off])"
1036: reg="*${regptr}"
1037: ;;
1038: esac
1039:
1040: # if this is a write, log the value written:
1041: if test $name = write; then
1042: echo ""
1043: echo " /* log the value written: */"
1044: if test $size != any; then
1045: echo " tme_m68k_verify_mem${size}(ic, ${fc}, ${addr}, ${reg}, TME_BUS_CYCLE_WRITE);"
1046: echo " tme_m68k_log(ic, 1000, TME_OK, "
1047: echo " (TME_M68K_LOG_HANDLE(ic),"
1048: echo " _(\"${action}\t%d:0x%08x:\t0x%0"`expr ${size} / 4`"x\"),"
1049: echo " ${fc},"
1050: echo " ${addr},"
1051: echo " ${reg}));"
1052: else
1053: echo " tme_m68k_verify_mem_any(ic, ${fc}, ${addr}, ${regptr}, ${count}, TME_BUS_CYCLE_WRITE);"
1054: echo " tme_m68k_log_start(ic, 1000, TME_OK) {"
1055: echo " unsigned int byte_i;"
1056: echo " tme_log_part(TME_M68K_LOG_HANDLE(ic),"
1057: echo " _(\"${action} %d:0x%08x count %d:\"),"
1058: echo " ${fc},"
1059: echo " ${addr},"
1060: echo " ${count});"
1061: echo " for (byte_i = 0; byte_i < count ; byte_i++) {"
1062: echo " tme_log_part(TME_M68K_LOG_HANDLE(ic), \" 0x%02x\", (${regptr})[byte_i]);"
1063: echo " }"
1064: echo " } tme_m68k_log_finish(ic);"
1065: fi
1066: fi
1067:
1068: echo ""
1069: echo " /* do the bus cycle(s) ourselves from emulator memory if we can."
1070: echo " the emulator memory allocator and TLB filler must guarantee"
1071: echo " that all tme_m68k_tlb_emulator_off_${name} pointers be 32-bit"
1072: echo " aligned, so that a 16-bit-aligned linear address gets a"
1073: echo " 16-bit-aligned emulator address: */"
1074: echo " if (__tme_predict_true(!TME_M68K_SEQUENCE_RESTARTING"
1075: if test $size != 8; then
1076: echo " && !(linear_address${_first} & 1)"
1077: fi
1078: echo " && TME_M68K_TLB_OK_FAST_${capname}(tlb,"
1079: echo " function_code,"
1080: echo " linear_address${_first},"
1081: echo " linear_address${_last}))) {"
1082:
1083: memptr="(tlb->tme_m68k_tlb_emulator_off_${name} + linear_address${_first})"
1084: mem="*((tme_uint${size}_t *) ${memptr})"
1085: if test $name = read; then
1086: simple="${reg} = tme_betoh_u${size}(${mem});"
1087: else
1088: simple="${mem} = tme_htobe_u${size}(${reg});"
1089: fi
1090:
1091: echo ""
1092:
1093: # if this is an 8-bit transfer:
1094: if test $size = 8; then
1095: echo " /* for an 8-bit transfer we can always do a simple "
1096: echo " assignment. the ${lockname}lock is unnecessary, since we assume"
1097: echo " that 8-bit accesses are always atomic: */"
1098: if test $name = read; then
1099: echo " ${reg} = ${mem};"
1100: else
1101: echo " ${mem} = ${reg};"
1102: fi
1103:
1104: # if this is a 16-bit transfer:
1105: elif test $size = 16; then
1106: echo " /* for a 16-bit transfer we can always do a simple"
1107: echo " assignment - we tested that the linear address"
1108: echo " is 16-bit aligned, which, since the TLB emulator"
1109: echo " offset is guaranteed to be 32-bit aligned, guarantees"
1110: echo " that the final emulator address is 16-bit aligned."
1111: echo ""
1112: echo " we need the ${lockname}lock if we're on an architecture"
1113: echo " where an aligned access may not be atomic: */"
1114: echo " tme_memory_aligned_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock);"
1115: echo " ${simple}"
1116: echo " tme_memory_aligned_unlock(tlb->tme_m68k_tlb_bus_rwlock);"
1117:
1118: # if this is a 32-bit transfer:
1119: elif test $size = 32; then
1120:
1121: echo " /* if the emulator host allows ${size}-bit quantities to be"
1122: echo " transferred ${from} 16-bit aligned addresses, or if this"
1123: echo " address is ${size}-bit aligned, do the transfer as a simple"
1124: echo " assignment, otherwise transfer two 16-bit words."
1125: echo ""
1126: echo " we need the ${lockname}lock if we're on an architecture where"
1127: echo " an aligned access may not be atomic, or if we're doing"
1128: echo " an unaligned access on an architecture where they may"
1129: echo " not be atomic: */"
1130: misaligned="(linear_address${_first} & (sizeof(tme_uint${size}_t) - 1))"
1131: echo "#if ALIGNOF_INT${size}_T <= ALIGNOF_INT16_T"
1132: echo "#ifdef TME_UNALIGNED_ACCESS_ATOMIC"
1133: echo " ${simple}"
1134: echo "#else /* !TME_UNALIGNED_ACCESS_ATOMIC */"
1135: echo " if (${misaligned}) {"
1136: echo " tme_memory_unaligned_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock);"
1137: echo " ${simple}"
1138: echo " tme_memory_unaligned_unlock(tlb->tme_m68k_tlb_bus_rwlock);"
1139: echo " }"
1140: echo " else {"
1141: echo " tme_memory_aligned_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock);"
1142: echo " ${simple}"
1143: echo " tme_memory_aligned_unlock(tlb->tme_m68k_tlb_bus_rwlock);"
1144: echo " }"
1145: echo "#endif /* !TME_UNALIGNED_ACCESS_ATOMIC */"
1146: echo "#else /* ALIGNOF_INT${size}_T > ALIGNOF_INT16_T */"
1147: echo " if (TME_SEQUENCE_ACCESS_NOT_COSTLIER || ${misaligned}) {"
1148: echo " tme_memory_sequence_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock); "
1149: if test $name = read; then
1150: echo "#ifdef WORDS_BIGENDIAN"
1151: echo " ${reg} = (((tme_uint${size}_t) ((tme_uint16_t *) ${memptr})[0]) << 16) | ((tme_uint16_t *) ${memptr})[1];"
1152: echo "#else /* !WORDS_BIGENDIAN */"
1153: echo " ${reg} = tme_betoh_u32((((tme_uint${size}_t) ((tme_uint16_t *) ${memptr})[1]) << 16) | ((tme_uint16_t *) ${memptr})[0]);"
1154: echo "#endif /* !WORDS_BIGENDIAN */"
1155: else
1156: echo " ((tme_uint16_t *) ${memptr})[0] = tme_htobe_u16(${reg} >> 16);"
1157: echo " ((tme_uint16_t *) ${memptr})[1] = tme_htobe_u16(${reg} & 0xffff);"
1158: fi
1159: echo " tme_memory_sequence_unlock(tlb->tme_m68k_tlb_bus_rwlock); "
1160: echo " }"
1161: echo " else {"
1162: echo " tme_memory_aligned_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock); "
1163: echo " ${simple}"
1164: echo " tme_memory_aligned_unlock(tlb->tme_m68k_tlb_bus_rwlock); "
1165: echo " }"
1166: echo "#endif /* ALIGNOF_INT${size}_T != 1 */"
1167:
1168: # if this is an any-transfer:
1169: elif test $size = any; then
1170: echo " tme_memory_sequence_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock);"
1171: if test $name = read; then
1172: echo " memcpy(${regptr}, ${memptr}, ${count});"
1173: else
1174: echo " memcpy(${memptr}, ${regptr}, ${count});"
1175: fi
1176: echo " tme_memory_sequence_unlock(tlb->tme_m68k_tlb_bus_rwlock);"
1177:
1178: fi
1179: echo " TME_M68K_SEQUENCE_TRANSFER_STEP;"
1180: echo " }"
1181:
1182: echo ""
1183: echo " /* otherwise, do the bus cycles the slow way: */"
1184: echo " else {"
1185: if test $size != any; then
1186: echo " tme_m68k_${name}${size}(ic, tlb,"
1187: echo " ${fcptr},"
1188: echo " ${addrptr},"
1189: echo " ${regptr},"
1190: echo " ${flags});"
1191: else
1192: echo " tme_m68k_${name}(ic, tlb, ${fcptr}, ${addrptr}, ${regptr}, ${count}, TME_M68K_BUS_CYCLE_RAW);"
1193: fi
1194: echo " }"
1195:
1196: # if this is a read, log the value read:
1197: if test $name = read; then
1198: echo ""
1199: echo " /* log the value read: */"
1200: if test $size != any; then
1201: echo " tme_m68k_verify_mem${size}(ic, ${fc}, ${addr}, ${reg}, TME_BUS_CYCLE_READ);"
1202: echo " tme_m68k_log(ic, 1000, TME_OK,"
1203: echo " (TME_M68K_LOG_HANDLE(ic),"
1204: echo " _(\"${action}\t%d:0x%08x:\t0x%0"`expr ${size} / 4`"x\"),"
1205: echo " ${fc},"
1206: echo " ${addr},"
1207: echo " ${reg}));"
1208: else
1209: echo " tme_m68k_verify_mem_any(ic, ${fc}, ${addr}, ${regptr}, ${count}, TME_BUS_CYCLE_READ);"
1210: echo " tme_m68k_log_start(ic, 1000, TME_OK) {"
1211: echo " unsigned int byte_i;"
1212: echo " tme_log_part(TME_M68K_LOG_HANDLE(ic),"
1213: echo " _(\"${action} %d:0x%08x count %d:\"),"
1214: echo " ${fc},"
1215: echo " ${addr},"
1216: echo " ${count});"
1217: echo " for (byte_i = 0; byte_i < count ; byte_i++) {"
1218: echo " tme_log_part(TME_M68K_LOG_HANDLE(ic), \" 0x%02x\", (${regptr})[byte_i]);"
1219: echo " }"
1220: echo " } tme_m68k_log_finish(ic);"
1221: fi
1222: fi
1223:
1224: # perform any updating and value returning:
1225: case "$what" in
1226: stack)
1227: if test $name = read; then dir="+"; else dir="-"; fi
1228: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
1229: echo " ic->tme_m68k_ireg_a7 ${dir}= sizeof(tme_uint${size}_t);"
1230: echo " }"
1231: ;;
1232: inst)
1233: echo " ic->_tme_m68k_insn_buffer_off = insn_buffer_off + sizeof(tme_uint${size}_t);"
1234: echo " return(${reg});"
1235: ;;
1236: esac
1237:
1238: echo "}"
1239: :
1240: done
1241:
1242: # the general-purpose cycle-making read and write macros:
1243: if test ${size} != any; then
1244:
1245: # if we're making the header, emit a macro:
1246: if $header; then
1247: echo "#define tme_m68k_${name}${size}(ic, t, fc, la, _v, f) \\"
1248: echo " tme_m68k_${name}(ic, t, fc, la, (tme_uint8_t *) (_v), sizeof(tme_uint${size}_t), f)"
1249: fi
1250: else
1251:
1252: # if we're making the header, just emit a declaration:
1253: if $header; then
1254: echo "void tme_m68k_${name} _TME_P((struct tme_m68k *, struct tme_m68k_tlb *, unsigned int *, tme_uint32_t *, tme_uint8_t *, unsigned int, unsigned int));"
1255: continue
1256: fi
1257:
1258: echo ""
1259: echo "/* this ${name}s a region of address space using actual bus cycles: */"
1260: echo "void"
1261: echo "tme_m68k_${name}(struct tme_m68k *ic, "
1262: echo " struct tme_m68k_tlb *tlb,"
1263: echo " unsigned int *_function_code, "
1264: echo " tme_uint32_t *_linear_address, "
1265: echo " tme_uint8_t *reg,"
1266: echo " unsigned int reg_size,"
1267: echo " unsigned int flags)"
1268: echo "{"
1269:
1270: # our locals:
1271: echo " unsigned int function_code;"
1272: echo " tme_uint32_t linear_address;"
1273: echo " tme_bus_addr_t physical_address;"
1274: echo " int shift;"
1275: echo " struct tme_bus_cycle cycle;"
1276: echo " unsigned int transferred, resid, cycle_size;"
1277: echo " int exception;"
1278: echo " tme_rwlock_t *rmw_rwlock;"
1279: echo " int err;"
1280: echo "#ifndef WORDS_BIGENDIAN"
1281: echo " tme_uint8_t *reg_p;"
1282: echo " unsigned int buffer_i;"
1283: echo "#endif /* !WORDS_BIGENDIAN */"
1284:
1285: echo ""
1286: echo " /* if we're not restarting, everything is fresh: */"
1287: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
1288: echo " function_code = *_function_code;"
1289: echo " linear_address = *_linear_address;"
1290: echo " transferred = 0;"
1291: echo " }"
1292:
1293: echo ""
1294: echo " /* otherwise, if this is the transfer that faulted, restore"
1295: echo " our state to the cycle that faulted, then take into account"
1296: echo " any data provided by a software rerun of the faulted cycle: */"
1297: echo " else if (ic->_tme_m68k_sequence._tme_m68k_sequence_transfer_faulted"
1298: echo " == ic->_tme_m68k_sequence._tme_m68k_sequence_transfer_next) {"
1299: echo " function_code = *_function_code = ic->_tme_m68k_group0_function_code;"
1300: echo " linear_address = ic->_tme_m68k_group0_address;"
1301: echo " transferred = ic->_tme_m68k_sequence._tme_m68k_sequence_transfer_faulted_after;"
1302: echo " if (transferred >= reg_size) abort();"
1303: echo " *_linear_address = linear_address - transferred;"
1304: echo " resid = reg_size - transferred;"
1305: echo " if (ic->_tme_m68k_group0_buffer_${name}_size > resid) abort();"
1306: echo " if (ic->_tme_m68k_group0_buffer_${name}_softrr > resid) abort();"
1307: if test $name = read; then cmp=">"; else cmp="=="; fi
1308: echo " if (ic->_tme_m68k_group0_buffer_${name}_softrr ${cmp} 0) {"
1309: echo "#ifdef WORDS_BIGENDIAN"
1310: echo " memcpy(reg + transferred, "
1311: echo " ic->_tme_m68k_group0_buffer_${name},"
1312: echo " ic->_tme_m68k_group0_buffer_${name}_size);"
1313: echo "#else /* !WORDS_BIGENDIAN */"
1314: echo " reg_p = (reg + reg_size - 1) - transferred;"
1315: echo " for (buffer_i = 0;"
1316: echo " buffer_i < ic->_tme_m68k_group0_buffer_${name}_size;"
1317: echo " buffer_i++) {"
1318: echo " *(reg_p--) = ic->_tme_m68k_group0_buffer_${name}[buffer_i];"
1319: echo " }"
1320: echo "#endif /* !WORDS_BIGENDIAN */"
1321: echo " }"
1322: echo " transferred += ic->_tme_m68k_group0_buffer_${name}_softrr;"
1323: echo " }"
1324:
1325: echo ""
1326: echo " /* otherwise, a later transfer has faulted. just step the"
1327: echo " transfer number and return: */"
1328: echo " else {"
1329: echo " TME_M68K_SEQUENCE_TRANSFER_STEP;"
1330: echo " return;"
1331: echo " }"
1332:
1333: echo ""
1334: echo " /* do as many bus cycles as needed to complete the transfer: */"
1335: echo " rmw_rwlock = tlb->tme_m68k_tlb_bus_rwlock;"
1336: echo " exception = TME_M68K_EXCEPTION_NONE;"
1337: echo " cycle_size = 0;"
1338: echo " for(; transferred < reg_size; ) {"
1339: echo " resid = reg_size - transferred;"
1340:
1341: echo ""
1342: echo " /* start the bus cycle structure: */"
1343: echo " cycle.tme_bus_cycle_type = TME_BUS_CYCLE_${capname};"
1344: echo " if (TME_ENDIAN_NATIVE == TME_ENDIAN_BIG"
1345: echo " || (flags & TME_M68K_BUS_CYCLE_RAW)) {"
1346: echo " cycle.tme_bus_cycle_buffer = reg + transferred;"
1347: echo " cycle.tme_bus_cycle_buffer_increment = 1;"
1348: echo " }"
1349: echo " else {"
1350: echo " cycle.tme_bus_cycle_buffer = reg + reg_size - (1 + transferred);"
1351: echo " cycle.tme_bus_cycle_buffer_increment = -1;"
1352: echo " }"
1353:
1354: echo ""
1355: echo " /* if we're emulating a CPU with a 16-bit bus interface: */"
1356: echo " if (ic->_tme_m68k_bus_16bit) {"
1357: echo ""
1358: echo " /* if we're trying to transfer a non-power-of-two"
1359: echo " number of bytes, either the CPU is broken (no"
1360: echo " instructions ever transfer a non-power-of-two"
1361: echo " number of bytes), or this function allowed an"
1362: echo " unaligned transfer: */"
1363: echo " assert((resid & (resid - 1)) == 0"
1364: echo " || (flags & TME_M68K_BUS_CYCLE_RAW));"
1365: echo ""
1366: echo " /* only byte transfers can be unaligned: */"
1367: echo " if (resid > sizeof(tme_uint8_t)"
1368: echo " && (linear_address & 1)) {"
1369: echo " exception = TME_M68K_EXCEPTION_GROUP0_AERR;"
1370: echo " break;"
1371: echo " }"
1372: echo ""
1373: echo " /* set the bus-size specific parts of the bus cycle structure: */"
1374: echo " cycle_size = TME_MIN(resid, sizeof(tme_uint16_t));"
1375: echo " cycle.tme_bus_cycle_size = cycle_size;"
1376: echo " cycle.tme_bus_cycle_port = TME_BUS_CYCLE_PORT(0, TME_BUS16_LOG2);"
1377: echo " cycle.tme_bus_cycle_lane_routing = "
1378: echo " &tme_m68k_router_16[TME_M68K_BUS_ROUTER_INDEX(TME_BUS16_LOG2, cycle_size, linear_address)];"
1379: echo " }"
1380: echo ""
1381: echo " /* otherwise we're emulating a CPU with a 32-bit bus interface: */"
1382: echo " else {"
1383: if test $name = read; then
1384: echo ""
1385: echo " /* an instruction fetch must be aligned: */"
1386: echo " if (flags & TME_M68K_BUS_CYCLE_FETCH) {"
1387: echo " if (linear_address & 1) {"
1388: echo " exception = TME_M68K_EXCEPTION_GROUP0_AERR;"
1389: echo " break;"
1390: echo " }"
1391: echo " assert(!(resid & 1));"
1392: echo " }"
1393: fi
1394: echo ""
1395: echo " /* set the bus-size specific parts of the bus cycle structure: */"
1396: echo " cycle_size = TME_MIN(resid, sizeof(tme_uint32_t) - (linear_address & (sizeof(tme_uint32_t) - 1)));"
1397: echo " cycle.tme_bus_cycle_size = cycle_size;"
1398: echo " cycle.tme_bus_cycle_port = TME_BUS_CYCLE_PORT(0, TME_BUS32_LOG2);"
1399: echo " cycle.tme_bus_cycle_lane_routing = "
1400: echo " &tme_m68k_router_32[TME_M68K_BUS_ROUTER_INDEX(TME_BUS32_LOG2, cycle_size, linear_address)];"
1401: echo " }"
1402:
1403: echo ""
1404: echo " /* reload the TLB entry: */"
1405: echo " if (!TME_M68K_TLB_OK_SLOW_${capname}(tlb, function_code, linear_address)) {"
1406: echo " tme_m68k_tlb_fill(ic, tlb,"
1407: echo " function_code,"
1408: echo " linear_address,"
1409: echo " TME_BUS_CYCLE_${capname});"
1410: echo " }"
1411: echo ""
1412: echo " /* if this is a part of a read/modify/write cycle: */"
1413: echo " if (flags & TME_M68K_BUS_CYCLE_RMW) {"
1414: echo ""
1415: echo " /* if this TLB entry doesn't support fast ${name}s, or"
1416: echo " if the TLB lock has changed, that's a bus error."
1417: echo " see the discussion in tme_m68k_rmw_start: */"
1418: echo " if (!TME_M68K_TLB_OK_FAST_${capname}(tlb, function_code, linear_address, linear_address)"
1419: echo " || (rmw_rwlock != NULL"
1420: echo " && rmw_rwlock != tlb->tme_m68k_tlb_bus_rwlock)) {"
1421: echo " exception = TME_M68K_EXCEPTION_GROUP0_BERR;"
1422: echo " break;"
1423: echo " }"
1424: echo ""
1425: echo " /* if we haven't locked this memory yet, do so: */"
1426: echo " if (rmw_rwlock == NULL) {"
1427: echo " rmw_rwlock = tlb->tme_m68k_tlb_bus_rwlock;"
1428: echo " tme_rwlock_wrlock(rmw_rwlock);"
1429: echo " }"
1430: echo " }"
1431:
1432: echo ""
1433: echo " /* form the physical address for the bus cycle handler: */"
1434: echo " physical_address = tlb->tme_m68k_tlb_addr_offset + linear_address;"
1435: echo " shift = tlb->tme_m68k_tlb_addr_shift;"
1436: echo " if (shift < 0) {"
1437: echo " physical_address <<= (0 - shift);"
1438: echo " }"
1439: echo " else if (shift > 0) {"
1440: echo " physical_address >>= shift;"
1441: echo " }"
1442: echo " cycle.tme_bus_cycle_address = physical_address;"
1443:
1444: echo ""
1445: echo " /* run the bus cycle: */"
1446: echo " err = (*tlb->tme_m68k_tlb_bus_tlb.tme_bus_tlb_cycle)"
1447: echo " (tlb->tme_m68k_tlb_bus_tlb.tme_bus_tlb_cycle_private, &cycle);"
1448: echo ""
1449: echo " /* if we deadlocked, we have no locks to release"
1450: echo " ourselves, so sleep a while waiting for things"
1451: echo " to clear up, then try again: */"
1452: echo " if (err == TME_EDEADLK) {"
1453: echo " TME_THREAD_DEADLOCK_SLEEP();"
1454: echo " cycle.tme_bus_cycle_address = physical_address;"
1455: echo " }"
1456: echo ""
1457: echo " /* otherwise, any other error might be a bus error: */"
1458: echo " else if (err != TME_OK) {"
1459: echo " err = tme_bus_tlb_fault(&tlb->tme_m68k_tlb_bus_tlb, &cycle, err);"
1460: echo " if (err != TME_OK) {"
1461: echo " exception = TME_M68K_EXCEPTION_GROUP0_BERR;"
1462: echo " break;"
1463: echo " }"
1464: echo " }"
1465: echo ""
1466: echo " /* update: */"
1467: echo " linear_address += cycle.tme_bus_cycle_size;"
1468: echo " transferred += cycle.tme_bus_cycle_size;"
1469: echo " }"
1470:
1471: echo ""
1472: echo " /* if we got an exception and there is a locked"
1473: echo " read/modify/write rwlock, unlock it: */"
1474: echo " if (exception != TME_M68K_EXCEPTION_NONE"
1475: echo " && (flags & TME_M68K_BUS_CYCLE_RMW)"
1476: echo " && rmw_rwlock != NULL) {"
1477: echo " tme_rwlock_unlock(rmw_rwlock);"
1478: echo " }"
1479:
1480: echo ""
1481: echo " /* if we faulted, stash the information the fault stacker"
1482: echo " will need and start exception processing: */"
1483: echo " if (exception != TME_M68K_EXCEPTION_NONE) {"
1484: echo -n " ic->_tme_m68k_group0_flags = flags"
1485: if test $name = read; then
1486: echo -n " | TME_M68K_BUS_CYCLE_READ"
1487: fi
1488: echo ";"
1489: echo " ic->_tme_m68k_group0_function_code = function_code;"
1490: echo " ic->_tme_m68k_group0_address = linear_address;"
1491: echo " ic->_tme_m68k_group0_sequence = ic->_tme_m68k_sequence;"
1492: echo " ic->_tme_m68k_group0_sequence._tme_m68k_sequence_transfer_faulted_after = transferred;"
1493: echo " ic->_tme_m68k_group0_buffer_${name}_size = cycle_size;"
1494: if test $name = write; then
1495: echo "#ifdef WORDS_BIGENDIAN"
1496: echo " memcpy(ic->_tme_m68k_group0_buffer_${name},"
1497: echo " reg + transferred,"
1498: echo " ic->_tme_m68k_group0_buffer_${name}_size);"
1499: echo "#else /* !WORDS_BIGENDIAN */"
1500: echo " reg_p = (reg + reg_size - 1) - transferred;"
1501: echo " for (buffer_i = 0;"
1502: echo " buffer_i < ic->_tme_m68k_group0_buffer_${name}_size;"
1503: echo " buffer_i++) {"
1504: echo " ic->_tme_m68k_group0_buffer_${name}[buffer_i] = *(reg_p--);"
1505: echo " }"
1506: echo "#endif /* !WORDS_BIGENDIAN */"
1507: fi
1508: echo " if (ic->_tme_m68k_group0_hook != NULL) {"
1509: echo " (*ic->_tme_m68k_group0_hook)(ic);"
1510: echo " }"
1511: echo " ic->_tme_m68k_group0_sequence._tme_m68k_sequence_transfer_faulted = ";
1512: echo " ic->_tme_m68k_group0_sequence._tme_m68k_sequence_transfer_next;"
1513: echo " tme_m68k_exception(ic, exception);"
1514: echo " }"
1515:
1516: echo ""
1517: echo " /* otherwise, this transfer has now completed: */"
1518: echo " TME_M68K_SEQUENCE_TRANSFER_STEP;"
1519:
1520: echo "}"
1521: fi
1522: done
1523:
1524: done
1525:
1526: # generate the BCD math functions:
1527: for name in abcd sbcd nbcd; do
1528:
1529: # if we're making the header, just emit a declaration:
1530: if $header; then
1531: echo "TME_M68K_INSN_DECL(tme_m68k_${name});"
1532: continue
1533: fi
1534:
1535: # emit the function:
1536: echo ""
1537: echo "TME_M68K_INSN(tme_m68k_${name})"
1538: echo "{"
1539: echo " tme_uint8_t dst, dst_msd, dst_lsd;"
1540: echo " tme_uint8_t src, src_msd, src_lsd;"
1541: echo " tme_uint8_t res, res_msd, res_lsd;"
1542: echo " tme_uint8_t flags;"
1543:
1544: # get the operands:
1545: if test $name != nbcd; then
1546: echo " int memory;"
1547: echo " int rx, ry, function_code;"
1548: echo ""
1549: echo " TME_M68K_INSN_CANFAULT;"
1550: echo ""
1551: echo " /* load the operands: */"
1552: echo " rx = TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 0, 3);"
1553: echo " ry = TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 9, 3);"
1554: echo " memory = (TME_M68K_INSN_OPCODE & TME_BIT(3)) != 0;"
1555: echo " function_code = TME_M68K_FUNCTION_CODE_DATA(ic);"
1556: echo " if (memory) {"
1557: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
1558: echo " ic->_tme_m68k_ea_function_code = function_code;"
1559: echo " ic->_tme_m68k_ea_address = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + rx);"
1560: echo " }"
1561: echo " tme_m68k_read_memx8(ic);"
1562: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
1563: echo " ic->_tme_m68k_ea_function_code = function_code;"
1564: echo " ic->_tme_m68k_ea_address = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ry);"
1565: echo " }"
1566: echo " tme_m68k_read_mem8(ic, TME_M68K_IREG_MEMY32);"
1567: echo " src = ic->tme_m68k_ireg_memx8;"
1568: echo " dst = ic->tme_m68k_ireg_memy8;"
1569: echo " }"
1570: echo " else {"
1571: echo " src = ic->tme_m68k_ireg_uint8(rx << 2);"
1572: echo " dst = ic->tme_m68k_ireg_uint8(ry << 2);"
1573: echo " }"
1574: else
1575: echo ""
1576: echo " dst = 0x00;"
1577: echo " src = TME_M68K_INSN_OP1(tme_uint8_t);"
1578: fi
1579: echo " dst_lsd = TME_FIELD_EXTRACTU(dst, 0, 4);"
1580: echo " dst_msd = TME_FIELD_EXTRACTU(dst, 4, 4);"
1581: echo " src_lsd = TME_FIELD_EXTRACTU(src, 0, 4);"
1582: echo " src_msd = TME_FIELD_EXTRACTU(src, 4, 4);"
1583:
1584: # perform the operation:
1585: echo ""
1586: echo " /* perform the operation: */"
1587: if test $name = abcd; then op='+' ; opc='-' ; else op='-' ; opc='+' ; fi
1588: echo " res_lsd = dst_lsd ${op} src_lsd ${op} ((ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_X) != 0);"
1589: echo " res_msd = dst_msd ${op} src_msd;"
1590: echo " flags = 0;"
1591: echo " if (res_lsd > 9) {"
1592: echo " res_lsd ${opc}= 10;"
1593: echo " res_msd ${op}= 1;"
1594: echo " }"
1595: echo " if (res_msd > 9) {"
1596: echo " res_msd ${opc}= 10;"
1597: echo " flags |= TME_M68K_FLAG_C | TME_M68K_FLAG_X;"
1598: echo " }"
1599: echo " res = (res_msd << 4) + (res_lsd & 0xf);"
1600: echo " if (res == 0) flags |= TME_M68K_FLAG_N;"
1601: echo ""
1602:
1603: # store the result
1604: echo " /* store the result and set the flags: */"
1605: if test $name != nbcd; then
1606: echo " if (memory) {"
1607: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
1608: echo " ic->tme_m68k_ireg_memx8 = res;"
1609: echo " ic->_tme_m68k_ea_function_code = function_code;"
1610: echo " ic->_tme_m68k_ea_address = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ry);"
1611: # the stack pointer must always be incremented by a multiple of two.
1612: # assuming rx < 8, ((rx + 1) >> 3) == 1 iff rx == 7, meaning %a7:
1613: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + rx) += sizeof(tme_uint8_t) + ((rx + 1) >> 3);"
1614: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ry) += sizeof(tme_uint8_t) + ((ry + 1) >> 3);"
1615: echo " ic->tme_m68k_ireg_ccr = flags;"
1616: echo " }"
1617: echo " tme_m68k_write_memx8(ic);"
1618: echo " }"
1619: echo " else {"
1620: echo " ic->tme_m68k_ireg_uint8(ry << 2) = res;"
1621: echo " ic->tme_m68k_ireg_ccr = flags;"
1622: echo " }"
1623: else
1624: echo " TME_M68K_INSN_OP1(tme_uint8_t) = res;"
1625: echo " ic->tme_m68k_ireg_ccr = flags;"
1626: fi
1627: echo ""
1628: echo " TME_M68K_INSN_OK;"
1629: echo "}"
1630: done
1631:
1632: # generate the ccr and sr functions:
1633: for reg in ccr sr; do
1634: for name in ori andi eori move_to; do
1635: if test $reg = ccr; then size=8 ; else size=16 ; fi
1636:
1637: # if we're making the header, just emit a declaration:
1638: if $header; then
1639: echo "TME_M68K_INSN_DECL(tme_m68k_${name}_${reg});"
1640: continue
1641: fi
1642:
1643: # emit the function:
1644: echo ""
1645: echo "TME_M68K_INSN(tme_m68k_${name}_${reg})"
1646: echo "{"
1647: echo " tme_uint${size}_t reg;"
1648:
1649: # form the new register value:
1650: src=0
1651: echo -n " reg = "
1652: case $name in
1653: ori) echo -n "ic->tme_m68k_ireg_${reg} | " ;;
1654: andi) echo -n "ic->tme_m68k_ireg_${reg} & " ;;
1655: eori) echo -n "ic->tme_m68k_ireg_${reg} ^ " ;;
1656: move_to) size=16 ; src=1 ;;
1657: esac
1658: echo "(TME_M68K_INSN_OP${src}(tme_uint${size}_t) & TME_M68K_FLAG_"`echo $reg | tr a-z A-Z`");"
1659:
1660: # sr changes are special:
1661: if test $reg = sr; then
1662: echo " TME_M68K_INSN_PRIV;"
1663: echo " TME_M68K_INSN_CHANGE_SR(reg);"
1664: else
1665: echo " ic->tme_m68k_ireg_${reg} = reg;"
1666: fi
1667:
1668: echo " TME_M68K_INSN_OK;"
1669: echo "}"
1670: done
1671: done
1672:
1673: # generate the multiply and divide instructions:
1674:
1675: # permute on signed vs. unsigned:
1676: for _sign in u s; do
1677: if test $_sign = u; then sign=u; else sign=; fi
1678:
1679: # permute on short vs. long:
1680: for size in s l; do
1681: if test $size = s; then
1682: _size=
1683: small=16
1684: large=32
1685: reg_size_shift=' << 1'
1686: else
1687: _size=l
1688: small=32
1689: large=64
1690: reg_size_shift=
1691: fi
1692:
1693: # if we're making the header, just emit declarations:
1694: if $header; then
1695: echo "TME_M68K_INSN_DECL(tme_m68k_mul${_sign}${_size});"
1696: echo "TME_M68K_INSN_DECL(tme_m68k_div${_sign}${_size});"
1697: continue
1698: fi
1699:
1700: # emit the multiply function:
1701: echo ""
1702: echo "TME_M68K_INSN(tme_m68k_mul${_sign}${_size})"
1703: echo "{"
1704: if test $large = 64; then
1705: echo "#ifndef HAVE_UINT${large}_T"
1706: echo " abort();"
1707: echo "#else /* HAVE_UINT${large}_T */"
1708: echo " unsigned int flag_v;"
1709: echo " int ireg_dh;"
1710: fi
1711: echo " int ireg_dl;"
1712: echo " tme_${sign}int${large}_t res;"
1713: echo " tme_uint8_t flags;"
1714:
1715: echo ""
1716: echo " /* get the register containing the factor: */"
1717: echo -n " ireg_dl = TME_M68K_IREG_D0 + "
1718: if test $size = s; then
1719: echo "TME_M68K_INSN_OP0(tme_uint32_t);"
1720: else
1721: echo "TME_FIELD_EXTRACTU(TME_M68K_INSN_SPECOP, 12, 3);"
1722: fi
1723:
1724: echo ""
1725: echo " /* perform the multiplication: */"
1726: echo " res = (((tme_${sign}int${large}_t) ic->tme_m68k_ireg_${sign}int${small}(ireg_dl${reg_size_shift}))"
1727: echo " * TME_M68K_INSN_OP1(tme_${sign}int${small}_t));"
1728:
1729: echo ""
1730: echo " /* store the result: */"
1731: echo " ic->tme_m68k_ireg_${sign}int32(ireg_dl) = (tme_${sign}int32_t) res;"
1732: if test $large = 64; then
1733: echo " flag_v = TME_M68K_FLAG_V;"
1734: echo " if (TME_M68K_INSN_SPECOP & TME_BIT(10)) {"
1735: echo " flag_v = 0;"
1736: echo " ireg_dh = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(TME_M68K_INSN_SPECOP, 0, 3);"
1737: echo " ic->tme_m68k_ireg_${sign}int32(ireg_dh) = (tme_${sign}int32_t) (res >> 32);"
1738: echo " }"
1739: fi
1740:
1741: echo ""
1742: echo " /* set the flags: */"
1743: echo " flags = ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_X;"
1744: echo " if (((tme_int${large}_t) res) < 0) flags |= TME_M68K_FLAG_N;"
1745: echo " if (res == 0) flags |= TME_M68K_FLAG_Z;"
1746: if test $large = 64; then
1747: echo -n " if (res > 0xffffffff"
1748: if test $_sign = s; then echo -n " || res < -2147483648"; fi
1749: echo ") flags |= flag_v;"
1750: fi
1751: echo " ic->tme_m68k_ireg_ccr = flags;"
1752:
1753: echo ""
1754: echo " TME_M68K_INSN_OK;"
1755: if test $large = 64; then
1756: echo "#endif /* HAVE_UINT${large}_T */"
1757: fi
1758: echo "}"
1759:
1760: # emit the divide function:
1761: echo ""
1762: echo "TME_M68K_INSN(tme_m68k_div${_sign}${_size})"
1763: echo "{"
1764: if test $large = 64; then
1765: echo "#ifndef HAVE_UINT${large}_T"
1766: echo " abort();"
1767: echo "#else /* HAVE_UINT${large}_T */"
1768: echo " int ireg_dr;"
1769: fi
1770: echo " int ireg_dq;"
1771: echo " tme_${sign}int${large}_t dividend, quotient;"
1772: echo " tme_${sign}int${small}_t divisor, remainder;"
1773: echo " tme_uint8_t flags;"
1774:
1775: echo ""
1776: echo " /* get the register(s): */"
1777: echo -n " ireg_dq = TME_M68K_IREG_D0 + "
1778: if test $size = s; then
1779: echo "TME_M68K_INSN_OP0(tme_uint32_t);"
1780: else
1781: echo "TME_FIELD_EXTRACTU(TME_M68K_INSN_SPECOP, 12, 3);"
1782: echo " ireg_dr = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(TME_M68K_INSN_SPECOP, 0, 3);"
1783: fi
1784:
1785: echo ""
1786: echo " /* form the dividend and the divisor: */"
1787: if test $large = 64; then
1788: echo " if (TME_M68K_INSN_SPECOP & TME_BIT(10)) {"
1789: echo " dividend = (tme_${sign}int${large}_t)"
1790: echo " ((((tme_uint${large}_t) ic->tme_m68k_ireg_uint32(ireg_dr)) << 32)"
1791: echo " | ic->tme_m68k_ireg_uint32(ireg_dq));"
1792: echo " }"
1793: echo " else"
1794: echo -n " "
1795: fi
1796: echo " dividend = (tme_${sign}int${large}_t) ic->tme_m68k_ireg_${sign}int32(ireg_dq);"
1797: echo " divisor = TME_M68K_INSN_OP1(tme_${sign}int${small}_t);"
1798: echo " if (divisor == 0) {"
1799: echo " ic->tme_m68k_ireg_pc = ic->tme_m68k_ireg_pc_next;"
1800: echo " TME_M68K_INSN_EXCEPTION(TME_M68K_EXCEPTION_GROUP2(5));"
1801: echo " }"
1802:
1803: echo ""
1804: echo " /* do the division: */"
1805: echo " quotient = dividend / divisor;"
1806: echo " remainder = dividend % divisor;"
1807:
1808: echo ""
1809: echo " /* set the flags and return the quotient and remainder: */"
1810: echo " flags = ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_X;"
1811: echo -n " if (quotient > 0xffff"
1812: if test $small = 16; then
1813: if test $_sign = s; then echo -n " || quotient < -32768"; fi
1814: else
1815: echo -n "ffff"
1816: if test $_sign = s; then echo -n " || quotient < -2147483648"; fi
1817: fi
1818: echo ") {"
1819: echo " flags |= TME_M68K_FLAG_V;"
1820: echo " }"
1821: echo " else {"
1822: echo " if (((tme_int${small}_t) quotient) < 0) flags |= TME_M68K_FLAG_N;"
1823: echo " if (quotient == 0) flags |= TME_M68K_FLAG_Z;"
1824: echo " ic->tme_m68k_ireg_${sign}int${small}(ireg_dq${reg_size_shift}) = (tme_${sign}int${small}_t) quotient;"
1825: if test $small = 16; then
1826: echo " ic->tme_m68k_ireg_${sign}int${small}((ireg_dq${reg_size_shift}) + 1) = remainder;"
1827: else
1828: echo " if (ireg_dr != ireg_dq) {"
1829: echo " ic->tme_m68k_ireg_${sign}int${small}(ireg_dr) = remainder;"
1830: echo " }"
1831: fi
1832: echo " }"
1833: echo " ic->tme_m68k_ireg_ccr = flags;"
1834:
1835: echo ""
1836: echo " TME_M68K_INSN_OK;"
1837: if test $large = 64; then
1838: echo "#endif /* HAVE_UINT${large}_T */"
1839: fi
1840: echo "}"
1841:
1842: done
1843: done
1844:
1845: # done:
1846: exit 0
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