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1.1 root 1: #! /bin/sh
2:
1.1.1.2 ! root 3: # $Id: m68k-insns-auto.sh,v 1.21 2003/08/05 03:33:07 fredette Exp $
1.1 root 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! */
1.1.1.2 ! root 51: _TME_RCSID("\$Id: m68k-insns-auto.sh,v 1.21 2003/08/05 03:33:07 fredette Exp $");
1.1 root 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= ;;
1.1.1.2 ! root 424: asl) echo " tme_uint${size}_t sign_bits, sign_bits_mask;" ;;
1.1 root 425: rox[lr]) echo " tme_uint8_t xbit;" ;;
426: *) ;;
427: esac
428: echo " tme_${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"
1.1.1.2 ! root 468: echo " appear in the sign position into sign_bits, with a mask in"
! 469: echo " sign_bits_mask. if (sign_bits & sign_bits_mask) is zero or"
! 470: echo " sign_bits_mask, clear V, else set V."
1.1 root 471: echo ""
1.1.1.2 ! root 472: echo " start by loading the operand into sign_bits and setting"
! 473: echo " sign_bits_mask to all-bits-one."
1.1 root 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"
1.1.1.2 ! root 480: echo " sign position, so we can shift sign_bits_mask to ignore them."
1.1 root 481: echo ""
482: echo " if the shift count is greater than ${size} - 1, then all of the"
483: echo " bits in the operand, plus at least one zero bit, will appear in"
484: echo " the sign position. the only way that the sign bit will never"
485: echo " change during the shift is if the operand was zero to begin with."
1.1.1.2 ! root 486: echo " without any changes to sign_bits or sign_bits_mask, the final"
! 487: echo " test will always work, except when sign_bits is all-bits-one."
! 488: echo " the magic below clears the least-significant bit of sign_bits"
! 489: echo " iff sign_bits is all-bits-one: */"
1.1 root 490: echo " sign_bits = res;"
491: fi
492: echo " if (63 > SHIFTMAX_INT${size}_T"
493: echo " && count > ${size}) {"
494: echo " res = 0;"
495: echo " }"
496: echo " res <<= (count - 1);"
497: echo " flags = (res >> (${size} - 1));"
498: echo " flags *= TME_M68K_FLAG_C;"
499: echo " flags |= (flags * TME_M68K_FLAG_X);"
500: echo " res <<= 1;"
501: if test ${name} = asl; then
1.1.1.2 ! root 502: echo " sign_bits_mask = (tme_uint${size}_t) -1;"
1.1 root 503: echo " if (count != ${size} - 1) {"
504: echo " if (count < ${size}) {"
1.1.1.2 ! root 505: echo " sign_bits_mask <<= ((${size} - 1) - count);"
1.1 root 506: echo " }"
507: echo " else {"
1.1.1.2 ! root 508: echo " sign_bits ^= !(sign_bits + 1);"
1.1 root 509: echo " }"
510: echo " }"
1.1.1.2 ! root 511: echo " sign_bits &= sign_bits_mask;"
! 512: echo " if (sign_bits != 0 && sign_bits != sign_bits_mask) {"
1.1 root 513: echo " flags |= TME_M68K_FLAG_V;"
514: echo " }"
515: fi
516: ;;
517: ro[lr])
518: echo " count &= (${size} - 1);"
519: if test $dir = l; then
520: echo " res = (res << count) | (res >> (${size} - count));"
521: echo " flags |= ((res & 1) * TME_M68K_FLAG_C);"
522: else
523: echo " res = (res << (${size} - count)) | (res >> count);"
524: echo " flags |= ((res >> (${size} - 1)) * TME_M68K_FLAG_C);"
525: fi
526: ;;
527: rox[lr])
528: echo " count %= (${size} + 1);"
529: echo " flags = xbit;"
530: echo " if (count > 0) {"
531: if test $dir = l; then
532: echo " flags = (res >> (${size} - count)) & 1;"
533: echo " if (${size} > SHIFTMAX_INT${size}_T"
534: echo " && count == ${size}) {"
535: echo " res = 0 | (xbit << (${size} - 1)) | (res >> ((${size} + 1) - ${size}));"
536: echo " }"
537: echo " else if (${size} > SHIFTMAX_INT${size}_T"
538: echo " && count == 1) {"
539: echo " res = (res << 1) | (xbit << (1 - 1)) | 0;"
540: echo " }"
541: echo " else {"
542: echo " res = (res << count) | (xbit << (count - 1)) | (res >> ((${size} + 1) - count));"
543: echo " }"
544: else
545: echo " flags = (res >> (count - 1)) & 1;"
546: echo " if (${size} > SHIFTMAX_INT${size}_T"
547: echo " && count == ${size}) {"
548: echo " res = (res << ((${size} + 1) - ${size})) | (xbit << (${size} - ${size})) | 0;"
549: echo " }"
550: echo " else if (${size} > SHIFTMAX_INT${size}_T"
551: echo " && count == 1) {"
552: echo " res = 0 | (xbit << (${size} - 1)) | (res >> 1);"
553: echo " }"
554: echo " else {"
555: echo " res = (res << ((${size} + 1) - count)) | (xbit << (${size} - count)) | (res >> count);"
556: echo " }"
557: fi
558: echo " }"
559: echo " flags *= TME_M68K_FLAG_C;"
560: echo " flags |= (flags * TME_M68K_FLAG_X);"
561: ;;
562: esac
563: echo " }"
564:
565: echo ""
566: echo " /* store the result: */"
567: echo " TME_M68K_INSN_OP1(tme_${sign}int${size}_t) = res;"
568:
569: echo ""
570: echo " /* generate the N flag. we cast to tme_uint8_t as soon as we"
571: echo " know the bit we want is within the range of the type, to try"
572: echo " to affect the generated assembly: */"
573: echo " flags |= ((tme_uint8_t) (((tme_uint${size}_t) res) >> (${size} - 1))) * TME_M68K_FLAG_N;"
574:
575: echo ""
576: echo " /* generate the Z flag: */"
577: echo " if (res == 0) flags |= TME_M68K_FLAG_Z;"
578:
579: echo ""
580: echo " /* store the flags: */"
581: echo " ic->tme_m68k_ireg_ccr = flags;"
582: echo " TME_M68K_INSN_OK;"
583: echo "}"
584: done
585: done
586:
587: # movep_rm, movep_mr, movem_rm, and movem_mr:
588: for name in rm mr; do
589:
590: # movep and movem don't need 8-bit versions:
591: if test ${size} = 8; then continue; fi
592:
593: # if we're making the header, just emit declarations:
594: if $header; then
595: echo "TME_M68K_INSN_DECL(tme_m68k_movep_${name}${size});"
596: echo "TME_M68K_INSN_DECL(tme_m68k_movem_${name}${size});"
597: continue
598: fi
599:
600: # emit the movep function:
601: echo ""
602: echo "/* the movep_${name} function on a ${size}-bit dreg: */"
603: echo "TME_M68K_INSN(tme_m68k_movep_${name}${size})"
604: echo "{"
605: echo " unsigned int function_code;"
606: echo " tme_uint32_t linear_address;"
607: if test $name = rm; then
608: echo " tme_uint${size}_t value;"
609: fi
610: echo " int dreg;"
611: echo ""
612: echo " TME_M68K_INSN_CANFAULT;"
613: echo ""
614: echo " function_code = TME_M68K_FUNCTION_CODE_DATA(ic);"
615: echo " linear_address = TME_M68K_INSN_OP1(tme_uint32_t);"
616: echo " linear_address += (tme_int32_t) ((tme_int16_t) TME_M68K_INSN_SPECOP);"
617: echo " dreg = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 9, 3);"
618:
619: # set value:
620: if test $name = rm; then
621: echo " value = ic->tme_m68k_ireg_uint${size}(dreg${reg_size_shift});"
622: value="value"
623: else
624: value="ic->tme_m68k_ireg_uint${size}(dreg${reg_size_shift})"
625: fi
626:
627: # transfer the bytes:
628: pos=${size}
629: while test $pos != 0; do
630: pos=`expr ${pos} - 8`
631: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
632: echo " ic->_tme_m68k_ea_function_code = function_code;"
633: echo " ic->_tme_m68k_ea_address = linear_address;"
634: if test $name = rm; then
635: echo " ic->tme_m68k_ireg_memx8 = TME_FIELD_EXTRACTU(${value}, ${pos}, 8);"
636: echo " }"
637: echo " tme_m68k_write_memx8(ic);"
638: else
639: echo " }"
640: echo " tme_m68k_read_memx8(ic);"
641: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
642: echo " TME_FIELD_DEPOSIT${size}(${value}, ${pos}, 8, ic->tme_m68k_ireg_memx8);"
643: echo " }"
644: fi
645: echo " linear_address += 2;"
646: done
647:
648: echo " TME_M68K_INSN_OK;"
649: echo "}"
650:
651: # emit the movem function:
652: echo ""
653: echo "/* the movem_${name} function on ${size}-bit registers: */"
654: echo "TME_M68K_INSN(tme_m68k_movem_${name}${size})"
655: echo "{"
656: echo " int ireg, direction;"
657: echo " tme_uint16_t mask, bit;"
658: echo " unsigned int ea_mode;"
659: echo " tme_uint32_t addend;"
660:
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;"
1.1.1.2 ! root 680: echo " if (mask != 0) {"
! 681: echo " TME_M68K_INSN_CANFAULT;"
! 682: echo " }"
1.1 root 683: echo " for (bit = 1; bit != 0; bit <<= 1) {"
684: echo " if (mask & bit) {"
685: if test $name = rm; then
686: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
687: echo " ic->tme_m68k_ireg_memx${size} = ic->tme_m68k_ireg_uint${size}(ireg${reg_size_shift});"
688: echo " }"
689: echo " tme_m68k_write_memx${size}(ic);"
690: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
691: else
692: echo " tme_m68k_read_memx${size}(ic);"
693: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
694: echo -n " ic->tme_m68k_ireg_uint32(ireg) = "
695: if test $size = 32; then
696: echo "ic->tme_m68k_ireg_memx${size};"
697: else
698: echo "TME_EXT_S${size}_U32((tme_int${size}_t) ic->tme_m68k_ireg_memx${size});"
699: fi
700: fi
701: echo " ic->_tme_m68k_ea_address += addend;"
702: echo " }"
703: echo " }"
704: echo " ireg += direction;"
705: echo " }"
706: echo ""
707:
708: # for the predecrement and postincrement modes, update the
709: # address register:
710: if test $name = rm; then
711: echo " /* if this is the predecrement mode, update the address register: */"
712: echo " if (ea_mode == 4) {"
713: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0"
714: echo " + TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 0, 3))"
715: echo " = (ic->_tme_m68k_ea_address + sizeof(tme_uint${size}_t));"
716: echo " }"
717: else
718: echo " /* if this is the postincrement mode, update the address register: */"
719: echo " if (ea_mode == 3) {"
720: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0"
721: echo " + TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 0, 3))"
722: echo " = ic->_tme_m68k_ea_address;"
723: echo " }"
724: fi
725:
726: echo " TME_M68K_INSN_OK;"
727: echo "}"
728: done
729:
730: # chk32 and chk16:
731: if test $size != 8; then
732:
733: # if we're making the header, just emit a declaration:
734: if $header; then
735: echo "TME_M68K_INSN_DECL(tme_m68k_chk${size});"
736: else
737: echo ""
738: echo "/* chk${size}: */"
739: echo "TME_M68K_INSN(tme_m68k_chk${size})"
740: echo "{"
741: echo " if (*((tme_int${size}_t *) _op0) < 0) {"
742: echo " ic->tme_m68k_ireg_ccr |= TME_M68K_FLAG_N;"
743: echo " ic->tme_m68k_ireg_pc = ic->tme_m68k_ireg_pc_next;"
744: echo " TME_M68K_INSN_EXCEPTION(TME_M68K_EXCEPTION_GROUP2(6));"
745: echo " }"
746: echo " if (*((tme_int${size}_t *) _op0) > *((tme_int${size}_t *) _op1)) {"
747: echo " ic->tme_m68k_ireg_ccr &= ~TME_M68K_FLAG_N;"
748: echo " ic->tme_m68k_ireg_pc = ic->tme_m68k_ireg_pc_next;"
749: echo " TME_M68K_INSN_EXCEPTION(TME_M68K_EXCEPTION_GROUP2(6));"
750: echo " }"
751: echo " TME_M68K_INSN_OK;"
752: echo "}"
753: fi
754: fi
755:
756: # cas and cas2:
757: for name in cas cas2_; do
758:
759: # cas2 doesn't do byte operands:
760: buffers=x
761: if test $name = cas2_; then
762: if test $size = 8; then continue; fi
763: buffers="x y"
764: fi
765:
766: if $header; then
767: echo "TME_M68K_INSN_DECL(tme_m68k_${name}${size});"
768: else
769: echo ""
770: echo "/* ${name}${size}: */"
771: echo "TME_M68K_INSN(tme_m68k_${name}${size})"
772: echo "{"
773: echo " struct tme_m68k_tlb *tlb;"
774: echo " int ireg_dc, ireg_du;"
775: echo " int do_write;"
776: echo " tme_uint16_t specopx = ic->_tme_m68k_insn_specop;"
777: if test $name = cas2_; then
778: echo " tme_uint16_t specopy = ic->_tme_m68k_insn_specop2;"
779: echo " tme_uint32_t addrx;"
780: echo " tme_uint32_t addry;"
781: echo ""
782: echo " /* get the function code and addresses we'll be dealing with: */"
783: echo " ic->_tme_m68k_ea_function_code = TME_M68K_FUNCTION_CODE_DATA(ic);"
784: echo " addrx = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_D0"
785: echo " + TME_FIELD_EXTRACTU(specopx, 12, 4));"
786: echo " addry = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_D0"
787: echo " + TME_FIELD_EXTRACTU(specopy, 12, 4));"
788: fi
789: echo ""
790: echo " /* start the read/modify/write cycle: */"
791: echo " tlb = tme_m68k_rmw_start(ic);"
792: echo " if (tlb == NULL) {"
793: echo " TME_M68K_INSN_OK;"
794: echo " }"
795: echo ""
796: echo " /* read: */"
797: for buffer in $buffers; do
798: if test $name = cas2_; then
799: echo " ic->_tme_m68k_ea_address = addr${buffer};"
800: fi
801: echo " tme_m68k_read${size}(ic, tlb,"
802: echo " &ic->_tme_m68k_ea_function_code,"
803: echo " &ic->_tme_m68k_ea_address,"
804: echo " &ic->tme_m68k_ireg_mem${buffer}${size},"
805: echo " TME_M68K_BUS_CYCLE_RMW);"
806: done
807:
808: echo ""
809: echo " /* modify: */"
810: for buffer in $buffers; do
811: i=
812: if test $buffer = y; then
813: echo " if (ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_Z) {"
814: i=" "
815: fi
816: echo "${i} ireg_dc = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(specop${buffer}, 0, 3);"
817: echo "${i} tme_m68k_cmp${size}(ic, &ic->tme_m68k_ireg_uint${size}(ireg_dc), &ic->tme_m68k_ireg_mem${buffer}${size});"
818: if test $buffer = y; then
819: echo " }"
820: fi
821: done
822:
823: echo ""
824: echo " /* write: */"
825: echo " if (ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_Z) {"
826: for buffer in $buffers; do
827: if test $name = cas2_; then
828: echo " ic->_tme_m68k_ea_address = addr${buffer};"
829: fi
830: echo " ireg_du = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(specop${buffer}, 6, 3);"
831: echo " ic->tme_m68k_ireg_mem${buffer}${size} = ic->tme_m68k_ireg_uint${size}(ireg_du);"
832: echo " tme_m68k_write${size}(ic, tlb,"
833: echo " &ic->_tme_m68k_ea_function_code,"
834: echo " &ic->_tme_m68k_ea_address,"
835: echo " &ic->tme_m68k_ireg_mem${buffer}${size},"
836: echo " TME_M68K_BUS_CYCLE_RMW);"
837: done
838: echo " }"
839: echo " else {"
840: echo " /* XXX the 68040 always does a write to finish its cycle: */"
841: echo " do_write = FALSE;"
842: for buffer in $buffers; do
843: echo " ireg_dc = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(specop${buffer}, 0, 3);"
844: echo -n " if (do_write"
845: if test $name = cas2_; then
846: echo ""
847: echo " && ic->tme_m68k_ireg_mem${buffer}${size} != ic->tme_m68k_ireg_uint${size}(ireg_dc)) {"
848: echo " ic->_tme_m68k_ea_address = addr${buffer};"
849: else
850: echo ") {"
851: fi
852: echo " tme_m68k_write${size}(ic, tlb,"
853: echo " &ic->_tme_m68k_ea_function_code,"
854: echo " &ic->_tme_m68k_ea_address,"
855: echo " &ic->tme_m68k_ireg_mem${buffer}${size},"
856: echo " TME_M68K_BUS_CYCLE_RMW);"
857: echo " do_write = FALSE;"
858: echo " }"
859: echo " ic->tme_m68k_ireg_uint${size}(ireg_dc) = ic->tme_m68k_ireg_mem${buffer}${size};"
860: done
861: echo " }"
862: echo ""
863: echo " /* finish the read/modify/write cycle: */"
864: echo " tme_m68k_rmw_finish(ic, tlb);"
865: echo ""
866: echo " TME_M68K_INSN_OK;"
867: echo "}"
868: fi
869: done
870:
871: # moves:
872: if $header; then
873: echo "TME_M68K_INSN_DECL(tme_m68k_moves${size});"
874: else
875: echo ""
876: echo "/* moves${size}: */"
877: echo "TME_M68K_INSN(tme_m68k_moves${size})"
878: echo "{"
879: echo " int ireg;"
880: echo " ireg = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(TME_M68K_INSN_SPECOP, 12, 4);"
881: echo " if (TME_M68K_INSN_SPECOP & TME_BIT(11)) {"
882: echo " ic->tme_m68k_ireg_memx${size} = ic->tme_m68k_ireg_uint${size}(ireg${reg_size_shift});"
883: echo " }"
884: echo " else {"
885: if test ${size} != 32; then
886: echo " if (ireg >= TME_M68K_IREG_A0) {"
887: echo " ic->tme_m68k_ireg_uint32(ireg) = "
888: echo " TME_EXT_S${size}_U32((tme_int${size}_t) ic->tme_m68k_ireg_memx${size});"
889: echo " }"
890: echo " else"
891: echo -n " "
892: fi
893: echo " ic->tme_m68k_ireg_uint${size}(ireg${reg_size_shift}) = ic->tme_m68k_ireg_memx${size};"
894: echo " }"
895: echo " TME_M68K_INSN_OK;"
896: echo "}"
897: fi
898: done
899:
900: # generate the memory read and write functions:
901:
902: # permute on size:
903: for size in 8 16 32 any; do
904:
905: # permute on read or write:
906: for name in read write; do
907: capname=`echo $name | tr a-z A-Z`
908: if test $name = read; then
909: lockname="rd"
910: from="from"
911: else
912: lockname="wr"
913: from="to"
914: fi
915:
916: # permute on the special-purpose what:
917: for what in memx mem inst stack; do
918:
919: # placeholder for another permutation:
920: :
921:
922: # dispatch on the size:
923: _first=_first ; _last=_last
924: case "$size" in
925: 8) _first= ; _last= ;;
926: esac
927:
928: # set up the details of each special purpose:
929: rval="void"
930: args=""
931: args_proto=""
932: fc=""
933: addr=""
934: count=""
935: tlb="TME_M68K_TLB_ENTRY(ic, function_code, linear_address${_first})"
936: flags="TME_M68K_BUS_CYCLE_NORMAL"
937: case "${name}-${what}-${size}" in
938: *-memx-8 | *-memx-16 | *-memx-32)
939: action="${name}_${what}${size}"
940: fcptr="&ic->_tme_m68k_ea_function_code"
941: addrptr="&ic->_tme_m68k_ea_address"
942: reg="ic->tme_m68k_ireg_memx${size}"
943: regptr="&${reg}"
944: ;;
945: *-mem-any)
946: action="${name}_${what}"
947: args_proto=", tme_uint8_t *, unsigned int"
948: args=", tme_uint8_t *buffer, unsigned int count"
949: fcptr="&ic->_tme_m68k_ea_function_code"
950: addrptr="&ic->_tme_m68k_ea_address"
951: reg=
952: regptr="buffer"
953: ;;
954: *-mem-8 | *-mem-16 | *-mem-32)
955: action="${name}_${what}${size}"
956: args_proto=", int"
957: args="${args_proto} ireg"
958: fcptr="&ic->_tme_m68k_ea_function_code"
959: addrptr="&ic->_tme_m68k_ea_address"
960: reg="ic->tme_m68k_ireg_uint${size}(ireg)"
961: regptr="&${reg}"
962: ;;
963: read-stack-16 | read-stack-32)
964: action="pop${size}"
965: args_proto=", tme_uint${size}_t *"
966: args="${args_proto}_value"
967: fc="TME_M68K_FUNCTION_CODE_DATA(ic)"
968: addrptr="&ic->tme_m68k_ireg_a7"
969: regptr="_value"
970: reg="*${regptr}"
971: ;;
972: write-stack-16 | write-stack-32)
973: action="push${size}"
974: args_proto=", tme_uint${size}_t "
975: args="${args_proto}value"
976: fc="TME_M68K_FUNCTION_CODE_DATA(ic)"
977: addr="ic->tme_m68k_ireg_a7 - sizeof(tme_uint${size}_t)"
978: reg="value"
979: regptr="&${reg}"
980: ;;
981: read-inst-16 | read-inst-32)
982: rval="tme_uint${size}_t"
983: action="fetch${size}"
984: args_proto=", tme_uint32_t"
985: args="${args_proto} pc"
986: fc="TME_M68K_FUNCTION_CODE_PROGRAM(ic)"
987: addrptr="&pc"
988: tlb="TME_ATOMIC_READ(struct tme_m68k_tlb *, ic->_tme_m68k_itlb)";
989: flags="TME_M68K_BUS_CYCLE_FETCH"
990: ;;
991: *)
992: continue
993: ;;
994: esac
995:
996: # if we're making the header, just emit a declaration:
997: if $header; then
998: echo "${rval} tme_m68k_${action} _TME_P((struct tme_m68k *${args_proto}));"
999: continue
1000: fi
1001:
1002: # start the function:
1003: echo ""
1004: echo "/* this ${name}s a ${size}-bit ${what} value: */"
1005: echo "${rval}"
1006: echo "tme_m68k_${action}(struct tme_m68k *ic${args}) "
1007: echo "{"
1008:
1009: # our locals:
1010: echo -n " unsigned int function_code = "
1011: if test "x${fc}" != x; then
1012: echo "${fc};"
1013: fc="function_code"
1014: fcptr="&function_code"
1015: else
1016: fc=`echo ${fcptr} | sed -e 's,^&,,'`
1017: echo "${fc};"
1018: fi
1019: echo -n " tme_uint32_t linear_address${_first} = "
1020: if test "x${addr}" != x; then
1021: echo "${addr};"
1022: addr="linear_address${_first}"
1023: addrptr="&linear_address${_first}"
1024: else
1025: addr=`echo ${addrptr} | sed -e 's,^&,,'`
1026: echo "${addr};"
1027: fi
1028: if test "x${count}" = x; then
1029: if test $size = any; then count=count; else count="sizeof(tme_uint${size}_t)"; fi
1030: fi
1031: if test x$_last != x; then
1032: echo " tme_uint32_t linear_address${_last} = linear_address_first + ${count} - 1;";
1033: fi
1034: echo " struct tme_m68k_tlb *tlb = ${tlb};"
1035: case "$what" in
1036: inst)
1037: echo " unsigned int insn_buffer_off = TME_ALIGN(ic->_tme_m68k_insn_buffer_off, sizeof(tme_uint${size}_t));"
1038: regptr="((tme_uint${size}_t *) &ic->_tme_m68k_insn_buffer[insn_buffer_off])"
1039: reg="*${regptr}"
1040: ;;
1041: esac
1042:
1043: # if this is a write, log the value written:
1044: if test $name = write; then
1045: echo ""
1046: echo " /* log the value written: */"
1047: if test $size != any; then
1048: echo " tme_m68k_verify_mem${size}(ic, ${fc}, ${addr}, ${reg}, TME_BUS_CYCLE_WRITE);"
1049: echo " tme_m68k_log(ic, 1000, TME_OK, "
1050: echo " (TME_M68K_LOG_HANDLE(ic),"
1051: echo " _(\"${action}\t%d:0x%08x:\t0x%0"`expr ${size} / 4`"x\"),"
1052: echo " ${fc},"
1053: echo " ${addr},"
1054: echo " ${reg}));"
1055: else
1056: echo " tme_m68k_verify_mem_any(ic, ${fc}, ${addr}, ${regptr}, ${count}, TME_BUS_CYCLE_WRITE);"
1057: echo " tme_m68k_log_start(ic, 1000, TME_OK) {"
1058: echo " unsigned int byte_i;"
1059: echo " tme_log_part(TME_M68K_LOG_HANDLE(ic),"
1060: echo " _(\"${action} %d:0x%08x count %d:\"),"
1061: echo " ${fc},"
1062: echo " ${addr},"
1063: echo " ${count});"
1064: echo " for (byte_i = 0; byte_i < count ; byte_i++) {"
1065: echo " tme_log_part(TME_M68K_LOG_HANDLE(ic), \" 0x%02x\", (${regptr})[byte_i]);"
1066: echo " }"
1067: echo " } tme_m68k_log_finish(ic);"
1068: fi
1069: fi
1070:
1071: echo ""
1072: echo " /* do the bus cycle(s) ourselves from emulator memory if we can."
1073: echo " the emulator memory allocator and TLB filler must guarantee"
1074: echo " that all tme_m68k_tlb_emulator_off_${name} pointers be 32-bit"
1075: echo " aligned, so that a 16-bit-aligned linear address gets a"
1076: echo " 16-bit-aligned emulator address: */"
1077: echo " if (__tme_predict_true(!TME_M68K_SEQUENCE_RESTARTING"
1078: if test $size != 8; then
1079: echo " && !(linear_address${_first} & 1)"
1080: fi
1081: echo " && TME_M68K_TLB_OK_FAST_${capname}(tlb,"
1082: echo " function_code,"
1083: echo " linear_address${_first},"
1084: echo " linear_address${_last}))) {"
1085:
1086: memptr="(tlb->tme_m68k_tlb_emulator_off_${name} + linear_address${_first})"
1087: mem="*((tme_uint${size}_t *) ${memptr})"
1088: if test $name = read; then
1089: simple="${reg} = tme_betoh_u${size}(${mem});"
1090: else
1091: simple="${mem} = tme_htobe_u${size}(${reg});"
1092: fi
1093:
1094: echo ""
1095:
1096: # if this is an 8-bit transfer:
1097: if test $size = 8; then
1098: echo " /* for an 8-bit transfer we can always do a simple "
1099: echo " assignment. the ${lockname}lock is unnecessary, since we assume"
1100: echo " that 8-bit accesses are always atomic: */"
1101: if test $name = read; then
1102: echo " ${reg} = ${mem};"
1103: else
1104: echo " ${mem} = ${reg};"
1105: fi
1106:
1107: # if this is a 16-bit transfer:
1108: elif test $size = 16; then
1109: echo " /* for a 16-bit transfer we can always do a simple"
1110: echo " assignment - we tested that the linear address"
1111: echo " is 16-bit aligned, which, since the TLB emulator"
1112: echo " offset is guaranteed to be 32-bit aligned, guarantees"
1113: echo " that the final emulator address is 16-bit aligned."
1114: echo ""
1115: echo " we need the ${lockname}lock if we're on an architecture"
1116: echo " where an aligned access may not be atomic: */"
1117: echo " tme_memory_aligned_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock);"
1118: echo " ${simple}"
1119: echo " tme_memory_aligned_unlock(tlb->tme_m68k_tlb_bus_rwlock);"
1120:
1121: # if this is a 32-bit transfer:
1122: elif test $size = 32; then
1123:
1124: echo " /* if the emulator host allows ${size}-bit quantities to be"
1125: echo " transferred ${from} 16-bit aligned addresses, or if this"
1126: echo " address is ${size}-bit aligned, do the transfer as a simple"
1127: echo " assignment, otherwise transfer two 16-bit words."
1128: echo ""
1129: echo " we need the ${lockname}lock if we're on an architecture where"
1130: echo " an aligned access may not be atomic, or if we're doing"
1131: echo " an unaligned access on an architecture where they may"
1132: echo " not be atomic: */"
1133: misaligned="(linear_address${_first} & (sizeof(tme_uint${size}_t) - 1))"
1134: echo "#if ALIGNOF_INT${size}_T <= ALIGNOF_INT16_T"
1135: echo "#ifdef TME_UNALIGNED_ACCESS_ATOMIC"
1136: echo " ${simple}"
1137: echo "#else /* !TME_UNALIGNED_ACCESS_ATOMIC */"
1138: echo " if (${misaligned}) {"
1139: echo " tme_memory_unaligned_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock);"
1140: echo " ${simple}"
1141: echo " tme_memory_unaligned_unlock(tlb->tme_m68k_tlb_bus_rwlock);"
1142: echo " }"
1143: echo " else {"
1144: echo " tme_memory_aligned_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock);"
1145: echo " ${simple}"
1146: echo " tme_memory_aligned_unlock(tlb->tme_m68k_tlb_bus_rwlock);"
1147: echo " }"
1148: echo "#endif /* !TME_UNALIGNED_ACCESS_ATOMIC */"
1149: echo "#else /* ALIGNOF_INT${size}_T > ALIGNOF_INT16_T */"
1150: echo " if (TME_SEQUENCE_ACCESS_NOT_COSTLIER || ${misaligned}) {"
1151: echo " tme_memory_sequence_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock); "
1152: if test $name = read; then
1153: echo "#ifdef WORDS_BIGENDIAN"
1154: echo " ${reg} = (((tme_uint${size}_t) ((tme_uint16_t *) ${memptr})[0]) << 16) | ((tme_uint16_t *) ${memptr})[1];"
1155: echo "#else /* !WORDS_BIGENDIAN */"
1156: echo " ${reg} = tme_betoh_u32((((tme_uint${size}_t) ((tme_uint16_t *) ${memptr})[1]) << 16) | ((tme_uint16_t *) ${memptr})[0]);"
1157: echo "#endif /* !WORDS_BIGENDIAN */"
1158: else
1159: echo " ((tme_uint16_t *) ${memptr})[0] = tme_htobe_u16(${reg} >> 16);"
1160: echo " ((tme_uint16_t *) ${memptr})[1] = tme_htobe_u16(${reg} & 0xffff);"
1161: fi
1162: echo " tme_memory_sequence_unlock(tlb->tme_m68k_tlb_bus_rwlock); "
1163: echo " }"
1164: echo " else {"
1165: echo " tme_memory_aligned_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock); "
1166: echo " ${simple}"
1167: echo " tme_memory_aligned_unlock(tlb->tme_m68k_tlb_bus_rwlock); "
1168: echo " }"
1169: echo "#endif /* ALIGNOF_INT${size}_T != 1 */"
1170:
1171: # if this is an any-transfer:
1172: elif test $size = any; then
1173: echo " tme_memory_sequence_${lockname}lock(tlb->tme_m68k_tlb_bus_rwlock);"
1174: if test $name = read; then
1175: echo " memcpy(${regptr}, ${memptr}, ${count});"
1176: else
1177: echo " memcpy(${memptr}, ${regptr}, ${count});"
1178: fi
1179: echo " tme_memory_sequence_unlock(tlb->tme_m68k_tlb_bus_rwlock);"
1180:
1181: fi
1182: echo " TME_M68K_SEQUENCE_TRANSFER_STEP;"
1183: echo " }"
1184:
1185: echo ""
1186: echo " /* otherwise, do the bus cycles the slow way: */"
1187: echo " else {"
1188: if test $size != any; then
1189: echo " tme_m68k_${name}${size}(ic, tlb,"
1190: echo " ${fcptr},"
1191: echo " ${addrptr},"
1192: echo " ${regptr},"
1193: echo " ${flags});"
1194: else
1195: echo " tme_m68k_${name}(ic, tlb, ${fcptr}, ${addrptr}, ${regptr}, ${count}, TME_M68K_BUS_CYCLE_RAW);"
1196: fi
1197: echo " }"
1198:
1199: # if this is a read, log the value read:
1200: if test $name = read; then
1201: echo ""
1202: echo " /* log the value read: */"
1203: if test $size != any; then
1204: echo " tme_m68k_verify_mem${size}(ic, ${fc}, ${addr}, ${reg}, TME_BUS_CYCLE_READ);"
1205: echo " tme_m68k_log(ic, 1000, TME_OK,"
1206: echo " (TME_M68K_LOG_HANDLE(ic),"
1207: echo " _(\"${action}\t%d:0x%08x:\t0x%0"`expr ${size} / 4`"x\"),"
1208: echo " ${fc},"
1209: echo " ${addr},"
1210: echo " ${reg}));"
1211: else
1212: echo " tme_m68k_verify_mem_any(ic, ${fc}, ${addr}, ${regptr}, ${count}, TME_BUS_CYCLE_READ);"
1213: echo " tme_m68k_log_start(ic, 1000, TME_OK) {"
1214: echo " unsigned int byte_i;"
1215: echo " tme_log_part(TME_M68K_LOG_HANDLE(ic),"
1216: echo " _(\"${action} %d:0x%08x count %d:\"),"
1217: echo " ${fc},"
1218: echo " ${addr},"
1219: echo " ${count});"
1220: echo " for (byte_i = 0; byte_i < count ; byte_i++) {"
1221: echo " tme_log_part(TME_M68K_LOG_HANDLE(ic), \" 0x%02x\", (${regptr})[byte_i]);"
1222: echo " }"
1223: echo " } tme_m68k_log_finish(ic);"
1224: fi
1225: fi
1226:
1227: # perform any updating and value returning:
1228: case "$what" in
1229: stack)
1230: if test $name = read; then dir="+"; else dir="-"; fi
1231: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
1232: echo " ic->tme_m68k_ireg_a7 ${dir}= sizeof(tme_uint${size}_t);"
1233: echo " }"
1234: ;;
1235: inst)
1236: echo " ic->_tme_m68k_insn_buffer_off = insn_buffer_off + sizeof(tme_uint${size}_t);"
1237: echo " return(${reg});"
1238: ;;
1239: esac
1240:
1241: echo "}"
1242: :
1243: done
1244:
1245: # the general-purpose cycle-making read and write macros:
1246: if test ${size} != any; then
1247:
1248: # if we're making the header, emit a macro:
1249: if $header; then
1250: echo "#define tme_m68k_${name}${size}(ic, t, fc, la, _v, f) \\"
1251: echo " tme_m68k_${name}(ic, t, fc, la, (tme_uint8_t *) (_v), sizeof(tme_uint${size}_t), f)"
1252: fi
1253: else
1254:
1255: # if we're making the header, just emit a declaration:
1256: if $header; then
1257: echo "void tme_m68k_${name} _TME_P((struct tme_m68k *, struct tme_m68k_tlb *, unsigned int *, tme_uint32_t *, tme_uint8_t *, unsigned int, unsigned int));"
1258: continue
1259: fi
1260:
1261: echo ""
1262: echo "/* this ${name}s a region of address space using actual bus cycles: */"
1263: echo "void"
1264: echo "tme_m68k_${name}(struct tme_m68k *ic, "
1265: echo " struct tme_m68k_tlb *tlb,"
1266: echo " unsigned int *_function_code, "
1267: echo " tme_uint32_t *_linear_address, "
1268: echo " tme_uint8_t *reg,"
1269: echo " unsigned int reg_size,"
1270: echo " unsigned int flags)"
1271: echo "{"
1272:
1273: # our locals:
1274: echo " unsigned int function_code;"
1275: echo " tme_uint32_t linear_address;"
1276: echo " tme_bus_addr_t physical_address;"
1277: echo " int shift;"
1278: echo " struct tme_bus_cycle cycle;"
1279: echo " unsigned int transferred, resid, cycle_size;"
1280: echo " int exception;"
1281: echo " tme_rwlock_t *rmw_rwlock;"
1282: echo " int err;"
1283: echo "#ifndef WORDS_BIGENDIAN"
1284: echo " tme_uint8_t *reg_p;"
1285: echo " unsigned int buffer_i;"
1286: echo "#endif /* !WORDS_BIGENDIAN */"
1287:
1288: echo ""
1289: echo " /* if we're not restarting, everything is fresh: */"
1290: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
1291: echo " function_code = *_function_code;"
1292: echo " linear_address = *_linear_address;"
1293: echo " transferred = 0;"
1294: echo " }"
1295:
1296: echo ""
1297: echo " /* otherwise, if this is the transfer that faulted, restore"
1298: echo " our state to the cycle that faulted, then take into account"
1299: echo " any data provided by a software rerun of the faulted cycle: */"
1300: echo " else if (ic->_tme_m68k_sequence._tme_m68k_sequence_transfer_faulted"
1301: echo " == ic->_tme_m68k_sequence._tme_m68k_sequence_transfer_next) {"
1302: echo " function_code = *_function_code = ic->_tme_m68k_group0_function_code;"
1303: echo " linear_address = ic->_tme_m68k_group0_address;"
1304: echo " transferred = ic->_tme_m68k_sequence._tme_m68k_sequence_transfer_faulted_after;"
1305: echo " if (transferred >= reg_size) abort();"
1306: echo " *_linear_address = linear_address - transferred;"
1307: echo " resid = reg_size - transferred;"
1308: echo " if (ic->_tme_m68k_group0_buffer_${name}_size > resid) abort();"
1309: echo " if (ic->_tme_m68k_group0_buffer_${name}_softrr > resid) abort();"
1310: if test $name = read; then cmp=">"; else cmp="=="; fi
1311: echo " if (ic->_tme_m68k_group0_buffer_${name}_softrr ${cmp} 0) {"
1312: echo "#ifdef WORDS_BIGENDIAN"
1313: echo " memcpy(reg + transferred, "
1314: echo " ic->_tme_m68k_group0_buffer_${name},"
1315: echo " ic->_tme_m68k_group0_buffer_${name}_size);"
1316: echo "#else /* !WORDS_BIGENDIAN */"
1317: echo " reg_p = (reg + reg_size - 1) - transferred;"
1318: echo " for (buffer_i = 0;"
1319: echo " buffer_i < ic->_tme_m68k_group0_buffer_${name}_size;"
1320: echo " buffer_i++) {"
1321: echo " *(reg_p--) = ic->_tme_m68k_group0_buffer_${name}[buffer_i];"
1322: echo " }"
1323: echo "#endif /* !WORDS_BIGENDIAN */"
1324: echo " }"
1325: echo " transferred += ic->_tme_m68k_group0_buffer_${name}_softrr;"
1326: echo " }"
1327:
1328: echo ""
1329: echo " /* otherwise, a later transfer has faulted. just step the"
1330: echo " transfer number and return: */"
1331: echo " else {"
1332: echo " TME_M68K_SEQUENCE_TRANSFER_STEP;"
1333: echo " return;"
1334: echo " }"
1335:
1336: echo ""
1337: echo " /* do as many bus cycles as needed to complete the transfer: */"
1338: echo " rmw_rwlock = tlb->tme_m68k_tlb_bus_rwlock;"
1339: echo " exception = TME_M68K_EXCEPTION_NONE;"
1340: echo " cycle_size = 0;"
1341: echo " for(; transferred < reg_size; ) {"
1342: echo " resid = reg_size - transferred;"
1343:
1344: echo ""
1345: echo " /* start the bus cycle structure: */"
1346: echo " cycle.tme_bus_cycle_type = TME_BUS_CYCLE_${capname};"
1347: echo " if (TME_ENDIAN_NATIVE == TME_ENDIAN_BIG"
1348: echo " || (flags & TME_M68K_BUS_CYCLE_RAW)) {"
1349: echo " cycle.tme_bus_cycle_buffer = reg + transferred;"
1350: echo " cycle.tme_bus_cycle_buffer_increment = 1;"
1351: echo " }"
1352: echo " else {"
1353: echo " cycle.tme_bus_cycle_buffer = reg + reg_size - (1 + transferred);"
1354: echo " cycle.tme_bus_cycle_buffer_increment = -1;"
1355: echo " }"
1356:
1357: echo ""
1358: echo " /* if we're emulating a CPU with a 16-bit bus interface: */"
1359: echo " if (ic->_tme_m68k_bus_16bit) {"
1360: echo ""
1361: echo " /* if we're trying to transfer a non-power-of-two"
1362: echo " number of bytes, either the CPU is broken (no"
1363: echo " instructions ever transfer a non-power-of-two"
1364: echo " number of bytes), or this function allowed an"
1365: echo " unaligned transfer: */"
1366: echo " assert((resid & (resid - 1)) == 0"
1367: echo " || (flags & TME_M68K_BUS_CYCLE_RAW));"
1368: echo ""
1369: echo " /* only byte transfers can be unaligned: */"
1370: echo " if (resid > sizeof(tme_uint8_t)"
1371: echo " && (linear_address & 1)) {"
1372: echo " exception = TME_M68K_EXCEPTION_GROUP0_AERR;"
1373: echo " break;"
1374: echo " }"
1375: echo ""
1376: echo " /* set the bus-size specific parts of the bus cycle structure: */"
1377: echo " cycle_size = TME_MIN(resid, sizeof(tme_uint16_t));"
1378: echo " cycle.tme_bus_cycle_size = cycle_size;"
1379: echo " cycle.tme_bus_cycle_port = TME_BUS_CYCLE_PORT(0, TME_BUS16_LOG2);"
1380: echo " cycle.tme_bus_cycle_lane_routing = "
1381: echo " &tme_m68k_router_16[TME_M68K_BUS_ROUTER_INDEX(TME_BUS16_LOG2, cycle_size, linear_address)];"
1382: echo " }"
1383: echo ""
1384: echo " /* otherwise we're emulating a CPU with a 32-bit bus interface: */"
1385: echo " else {"
1386: if test $name = read; then
1387: echo ""
1388: echo " /* an instruction fetch must be aligned: */"
1389: echo " if (flags & TME_M68K_BUS_CYCLE_FETCH) {"
1390: echo " if (linear_address & 1) {"
1391: echo " exception = TME_M68K_EXCEPTION_GROUP0_AERR;"
1392: echo " break;"
1393: echo " }"
1394: echo " assert(!(resid & 1));"
1395: echo " }"
1396: fi
1397: echo ""
1398: echo " /* set the bus-size specific parts of the bus cycle structure: */"
1399: echo " cycle_size = TME_MIN(resid, sizeof(tme_uint32_t) - (linear_address & (sizeof(tme_uint32_t) - 1)));"
1400: echo " cycle.tme_bus_cycle_size = cycle_size;"
1401: echo " cycle.tme_bus_cycle_port = TME_BUS_CYCLE_PORT(0, TME_BUS32_LOG2);"
1402: echo " cycle.tme_bus_cycle_lane_routing = "
1403: echo " &tme_m68k_router_32[TME_M68K_BUS_ROUTER_INDEX(TME_BUS32_LOG2, cycle_size, linear_address)];"
1404: echo " }"
1405:
1406: echo ""
1407: echo " /* reload the TLB entry: */"
1408: echo " if (!TME_M68K_TLB_OK_SLOW_${capname}(tlb, function_code, linear_address)) {"
1409: echo " tme_m68k_tlb_fill(ic, tlb,"
1410: echo " function_code,"
1411: echo " linear_address,"
1412: echo " TME_BUS_CYCLE_${capname});"
1413: echo " }"
1414: echo ""
1415: echo " /* if this is a part of a read/modify/write cycle: */"
1416: echo " if (flags & TME_M68K_BUS_CYCLE_RMW) {"
1417: echo ""
1418: echo " /* if this TLB entry doesn't support fast ${name}s, or"
1419: echo " if the TLB lock has changed, that's a bus error."
1420: echo " see the discussion in tme_m68k_rmw_start: */"
1421: echo " if (!TME_M68K_TLB_OK_FAST_${capname}(tlb, function_code, linear_address, linear_address)"
1422: echo " || (rmw_rwlock != NULL"
1423: echo " && rmw_rwlock != tlb->tme_m68k_tlb_bus_rwlock)) {"
1424: echo " exception = TME_M68K_EXCEPTION_GROUP0_BERR;"
1425: echo " break;"
1426: echo " }"
1427: echo ""
1428: echo " /* if we haven't locked this memory yet, do so: */"
1429: echo " if (rmw_rwlock == NULL) {"
1430: echo " rmw_rwlock = tlb->tme_m68k_tlb_bus_rwlock;"
1431: echo " tme_rwlock_wrlock(rmw_rwlock);"
1432: echo " }"
1433: echo " }"
1434:
1435: echo ""
1436: echo " /* form the physical address for the bus cycle handler: */"
1437: echo " physical_address = tlb->tme_m68k_tlb_addr_offset + linear_address;"
1438: echo " shift = tlb->tme_m68k_tlb_addr_shift;"
1439: echo " if (shift < 0) {"
1440: echo " physical_address <<= (0 - shift);"
1441: echo " }"
1442: echo " else if (shift > 0) {"
1443: echo " physical_address >>= shift;"
1444: echo " }"
1445: echo " cycle.tme_bus_cycle_address = physical_address;"
1446:
1447: echo ""
1448: echo " /* run the bus cycle: */"
1449: echo " err = (*tlb->tme_m68k_tlb_bus_tlb.tme_bus_tlb_cycle)"
1450: echo " (tlb->tme_m68k_tlb_bus_tlb.tme_bus_tlb_cycle_private, &cycle);"
1451: echo ""
1452: echo " /* if we deadlocked, we have no locks to release"
1453: echo " ourselves, so sleep a while waiting for things"
1454: echo " to clear up, then try again: */"
1455: echo " if (err == TME_EDEADLK) {"
1456: echo " TME_THREAD_DEADLOCK_SLEEP();"
1457: echo " cycle.tme_bus_cycle_address = physical_address;"
1458: echo " }"
1459: echo ""
1460: echo " /* otherwise, any other error might be a bus error: */"
1461: echo " else if (err != TME_OK) {"
1462: echo " err = tme_bus_tlb_fault(&tlb->tme_m68k_tlb_bus_tlb, &cycle, err);"
1463: echo " if (err != TME_OK) {"
1464: echo " exception = TME_M68K_EXCEPTION_GROUP0_BERR;"
1465: echo " break;"
1466: echo " }"
1467: echo " }"
1468: echo ""
1469: echo " /* update: */"
1470: echo " linear_address += cycle.tme_bus_cycle_size;"
1471: echo " transferred += cycle.tme_bus_cycle_size;"
1472: echo " }"
1473:
1474: echo ""
1475: echo " /* if we got an exception and there is a locked"
1476: echo " read/modify/write rwlock, unlock it: */"
1477: echo " if (exception != TME_M68K_EXCEPTION_NONE"
1478: echo " && (flags & TME_M68K_BUS_CYCLE_RMW)"
1479: echo " && rmw_rwlock != NULL) {"
1480: echo " tme_rwlock_unlock(rmw_rwlock);"
1481: echo " }"
1482:
1483: echo ""
1484: echo " /* if we faulted, stash the information the fault stacker"
1485: echo " will need and start exception processing: */"
1486: echo " if (exception != TME_M68K_EXCEPTION_NONE) {"
1487: echo -n " ic->_tme_m68k_group0_flags = flags"
1488: if test $name = read; then
1489: echo -n " | TME_M68K_BUS_CYCLE_READ"
1490: fi
1491: echo ";"
1492: echo " ic->_tme_m68k_group0_function_code = function_code;"
1493: echo " ic->_tme_m68k_group0_address = linear_address;"
1494: echo " ic->_tme_m68k_group0_sequence = ic->_tme_m68k_sequence;"
1495: echo " ic->_tme_m68k_group0_sequence._tme_m68k_sequence_transfer_faulted_after = transferred;"
1496: echo " ic->_tme_m68k_group0_buffer_${name}_size = cycle_size;"
1497: if test $name = write; then
1498: echo "#ifdef WORDS_BIGENDIAN"
1499: echo " memcpy(ic->_tme_m68k_group0_buffer_${name},"
1500: echo " reg + transferred,"
1501: echo " ic->_tme_m68k_group0_buffer_${name}_size);"
1502: echo "#else /* !WORDS_BIGENDIAN */"
1503: echo " reg_p = (reg + reg_size - 1) - transferred;"
1504: echo " for (buffer_i = 0;"
1505: echo " buffer_i < ic->_tme_m68k_group0_buffer_${name}_size;"
1506: echo " buffer_i++) {"
1507: echo " ic->_tme_m68k_group0_buffer_${name}[buffer_i] = *(reg_p--);"
1508: echo " }"
1509: echo "#endif /* !WORDS_BIGENDIAN */"
1510: fi
1511: echo " if (ic->_tme_m68k_group0_hook != NULL) {"
1512: echo " (*ic->_tme_m68k_group0_hook)(ic);"
1513: echo " }"
1514: echo " ic->_tme_m68k_group0_sequence._tme_m68k_sequence_transfer_faulted = ";
1515: echo " ic->_tme_m68k_group0_sequence._tme_m68k_sequence_transfer_next;"
1516: echo " tme_m68k_exception(ic, exception);"
1517: echo " }"
1518:
1519: echo ""
1520: echo " /* otherwise, this transfer has now completed: */"
1521: echo " TME_M68K_SEQUENCE_TRANSFER_STEP;"
1522:
1523: echo "}"
1524: fi
1525: done
1526:
1527: done
1528:
1529: # generate the BCD math functions:
1530: for name in abcd sbcd nbcd; do
1531:
1532: # if we're making the header, just emit a declaration:
1533: if $header; then
1534: echo "TME_M68K_INSN_DECL(tme_m68k_${name});"
1535: continue
1536: fi
1537:
1538: # emit the function:
1539: echo ""
1540: echo "TME_M68K_INSN(tme_m68k_${name})"
1541: echo "{"
1542: echo " tme_uint8_t dst, dst_msd, dst_lsd;"
1543: echo " tme_uint8_t src, src_msd, src_lsd;"
1544: echo " tme_uint8_t res, res_msd, res_lsd;"
1545: echo " tme_uint8_t flags;"
1546:
1547: # get the operands:
1548: if test $name != nbcd; then
1549: echo " int memory;"
1550: echo " int rx, ry, function_code;"
1551: echo ""
1552: echo " TME_M68K_INSN_CANFAULT;"
1553: echo ""
1554: echo " /* load the operands: */"
1555: echo " rx = TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 0, 3);"
1556: echo " ry = TME_FIELD_EXTRACTU(TME_M68K_INSN_OPCODE, 9, 3);"
1557: echo " memory = (TME_M68K_INSN_OPCODE & TME_BIT(3)) != 0;"
1558: echo " function_code = TME_M68K_FUNCTION_CODE_DATA(ic);"
1559: echo " if (memory) {"
1560: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
1561: echo " ic->_tme_m68k_ea_function_code = function_code;"
1562: echo " ic->_tme_m68k_ea_address = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + rx);"
1563: echo " }"
1564: echo " tme_m68k_read_memx8(ic);"
1565: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
1566: echo " ic->_tme_m68k_ea_function_code = function_code;"
1567: echo " ic->_tme_m68k_ea_address = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ry);"
1568: echo " }"
1569: echo " tme_m68k_read_mem8(ic, TME_M68K_IREG_MEMY32);"
1570: echo " src = ic->tme_m68k_ireg_memx8;"
1571: echo " dst = ic->tme_m68k_ireg_memy8;"
1572: echo " }"
1573: echo " else {"
1574: echo " src = ic->tme_m68k_ireg_uint8(rx << 2);"
1575: echo " dst = ic->tme_m68k_ireg_uint8(ry << 2);"
1576: echo " }"
1577: else
1578: echo ""
1579: echo " dst = 0x00;"
1580: echo " src = TME_M68K_INSN_OP1(tme_uint8_t);"
1581: fi
1582: echo " dst_lsd = TME_FIELD_EXTRACTU(dst, 0, 4);"
1583: echo " dst_msd = TME_FIELD_EXTRACTU(dst, 4, 4);"
1584: echo " src_lsd = TME_FIELD_EXTRACTU(src, 0, 4);"
1585: echo " src_msd = TME_FIELD_EXTRACTU(src, 4, 4);"
1586:
1587: # perform the operation:
1588: echo ""
1589: echo " /* perform the operation: */"
1590: if test $name = abcd; then op='+' ; opc='-' ; else op='-' ; opc='+' ; fi
1591: echo " res_lsd = dst_lsd ${op} src_lsd ${op} ((ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_X) != 0);"
1592: echo " res_msd = dst_msd ${op} src_msd;"
1593: echo " flags = 0;"
1594: echo " if (res_lsd > 9) {"
1595: echo " res_lsd ${opc}= 10;"
1596: echo " res_msd ${op}= 1;"
1597: echo " }"
1598: echo " if (res_msd > 9) {"
1599: echo " res_msd ${opc}= 10;"
1600: echo " flags |= TME_M68K_FLAG_C | TME_M68K_FLAG_X;"
1601: echo " }"
1602: echo " res = (res_msd << 4) + (res_lsd & 0xf);"
1603: echo " if (res == 0) flags |= TME_M68K_FLAG_N;"
1604: echo ""
1605:
1606: # store the result
1607: echo " /* store the result and set the flags: */"
1608: if test $name != nbcd; then
1609: echo " if (memory) {"
1610: echo " if (!TME_M68K_SEQUENCE_RESTARTING) {"
1611: echo " ic->tme_m68k_ireg_memx8 = res;"
1612: echo " ic->_tme_m68k_ea_function_code = function_code;"
1613: echo " ic->_tme_m68k_ea_address = ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ry);"
1614: # the stack pointer must always be incremented by a multiple of two.
1615: # assuming rx < 8, ((rx + 1) >> 3) == 1 iff rx == 7, meaning %a7:
1616: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + rx) += sizeof(tme_uint8_t) + ((rx + 1) >> 3);"
1617: echo " ic->tme_m68k_ireg_uint32(TME_M68K_IREG_A0 + ry) += sizeof(tme_uint8_t) + ((ry + 1) >> 3);"
1618: echo " ic->tme_m68k_ireg_ccr = flags;"
1619: echo " }"
1620: echo " tme_m68k_write_memx8(ic);"
1621: echo " }"
1622: echo " else {"
1623: echo " ic->tme_m68k_ireg_uint8(ry << 2) = res;"
1624: echo " ic->tme_m68k_ireg_ccr = flags;"
1625: echo " }"
1626: else
1627: echo " TME_M68K_INSN_OP1(tme_uint8_t) = res;"
1628: echo " ic->tme_m68k_ireg_ccr = flags;"
1629: fi
1630: echo ""
1631: echo " TME_M68K_INSN_OK;"
1632: echo "}"
1633: done
1634:
1635: # generate the ccr and sr functions:
1636: for reg in ccr sr; do
1637: for name in ori andi eori move_to; do
1638: if test $reg = ccr; then size=8 ; else size=16 ; fi
1639:
1640: # if we're making the header, just emit a declaration:
1641: if $header; then
1642: echo "TME_M68K_INSN_DECL(tme_m68k_${name}_${reg});"
1643: continue
1644: fi
1645:
1646: # emit the function:
1647: echo ""
1648: echo "TME_M68K_INSN(tme_m68k_${name}_${reg})"
1649: echo "{"
1650: echo " tme_uint${size}_t reg;"
1651:
1652: # form the new register value:
1653: src=0
1654: echo -n " reg = "
1655: case $name in
1656: ori) echo -n "ic->tme_m68k_ireg_${reg} | " ;;
1657: andi) echo -n "ic->tme_m68k_ireg_${reg} & " ;;
1658: eori) echo -n "ic->tme_m68k_ireg_${reg} ^ " ;;
1659: move_to) size=16 ; src=1 ;;
1660: esac
1661: echo "(TME_M68K_INSN_OP${src}(tme_uint${size}_t) & TME_M68K_FLAG_"`echo $reg | tr a-z A-Z`");"
1662:
1663: # sr changes are special:
1664: if test $reg = sr; then
1665: echo " TME_M68K_INSN_PRIV;"
1666: echo " TME_M68K_INSN_CHANGE_SR(reg);"
1667: else
1668: echo " ic->tme_m68k_ireg_${reg} = reg;"
1669: fi
1670:
1671: echo " TME_M68K_INSN_OK;"
1672: echo "}"
1673: done
1674: done
1675:
1676: # generate the multiply and divide instructions:
1677:
1678: # permute on signed vs. unsigned:
1679: for _sign in u s; do
1680: if test $_sign = u; then sign=u; else sign=; fi
1681:
1682: # permute on short vs. long:
1683: for size in s l; do
1684: if test $size = s; then
1685: _size=
1686: small=16
1687: large=32
1688: reg_size_shift=' << 1'
1689: else
1690: _size=l
1691: small=32
1692: large=64
1693: reg_size_shift=
1694: fi
1695:
1696: # if we're making the header, just emit declarations:
1697: if $header; then
1698: echo "TME_M68K_INSN_DECL(tme_m68k_mul${_sign}${_size});"
1699: echo "TME_M68K_INSN_DECL(tme_m68k_div${_sign}${_size});"
1700: continue
1701: fi
1702:
1703: # emit the multiply function:
1704: echo ""
1705: echo "TME_M68K_INSN(tme_m68k_mul${_sign}${_size})"
1706: echo "{"
1707: if test $large = 64; then
1.1.1.2 ! root 1708: echo "#ifndef TME_HAVE_INT${large}_T"
1.1 root 1709: echo " abort();"
1.1.1.2 ! root 1710: echo "#else /* TME_HAVE_INT${large}_T */"
1.1 root 1711: echo " unsigned int flag_v;"
1712: echo " int ireg_dh;"
1713: fi
1714: echo " int ireg_dl;"
1715: echo " tme_${sign}int${large}_t res;"
1716: echo " tme_uint8_t flags;"
1717:
1718: echo ""
1719: echo " /* get the register containing the factor: */"
1720: echo -n " ireg_dl = TME_M68K_IREG_D0 + "
1721: if test $size = s; then
1722: echo "TME_M68K_INSN_OP0(tme_uint32_t);"
1723: else
1724: echo "TME_FIELD_EXTRACTU(TME_M68K_INSN_SPECOP, 12, 3);"
1725: fi
1726:
1727: echo ""
1728: echo " /* perform the multiplication: */"
1729: echo " res = (((tme_${sign}int${large}_t) ic->tme_m68k_ireg_${sign}int${small}(ireg_dl${reg_size_shift}))"
1730: echo " * TME_M68K_INSN_OP1(tme_${sign}int${small}_t));"
1731:
1732: echo ""
1733: echo " /* store the result: */"
1734: echo " ic->tme_m68k_ireg_${sign}int32(ireg_dl) = (tme_${sign}int32_t) res;"
1735: if test $large = 64; then
1736: echo " flag_v = TME_M68K_FLAG_V;"
1737: echo " if (TME_M68K_INSN_SPECOP & TME_BIT(10)) {"
1738: echo " flag_v = 0;"
1739: echo " ireg_dh = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(TME_M68K_INSN_SPECOP, 0, 3);"
1740: echo " ic->tme_m68k_ireg_${sign}int32(ireg_dh) = (tme_${sign}int32_t) (res >> 32);"
1741: echo " }"
1742: fi
1743:
1744: echo ""
1745: echo " /* set the flags: */"
1746: echo " flags = ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_X;"
1747: echo " if (((tme_int${large}_t) res) < 0) flags |= TME_M68K_FLAG_N;"
1748: echo " if (res == 0) flags |= TME_M68K_FLAG_Z;"
1749: if test $large = 64; then
1.1.1.2 ! root 1750: if test $_sign = s; then
! 1751: echo -n " if (res > 0x7fffffffL || res < ((0L - 0x7fffffffL) - 1L)"
! 1752: else
! 1753: echo -n " if (res > 0xffffffffUL"
! 1754: fi
1.1 root 1755: echo ") flags |= flag_v;"
1756: fi
1757: echo " ic->tme_m68k_ireg_ccr = flags;"
1758:
1759: echo ""
1760: echo " TME_M68K_INSN_OK;"
1761: if test $large = 64; then
1.1.1.2 ! root 1762: echo "#endif /* TME_HAVE_INT${large}_T */"
1.1 root 1763: fi
1764: echo "}"
1765:
1766: # emit the divide function:
1767: echo ""
1768: echo "TME_M68K_INSN(tme_m68k_div${_sign}${_size})"
1769: echo "{"
1770: if test $large = 64; then
1.1.1.2 ! root 1771: echo "#ifndef TME_HAVE_INT${large}_T"
1.1 root 1772: echo " abort();"
1.1.1.2 ! root 1773: echo "#else /* TME_HAVE_INT${large}_T */"
1.1 root 1774: echo " int ireg_dr;"
1775: fi
1776: echo " int ireg_dq;"
1777: echo " tme_${sign}int${large}_t dividend, quotient;"
1778: echo " tme_${sign}int${small}_t divisor, remainder;"
1779: echo " tme_uint8_t flags;"
1780:
1781: echo ""
1782: echo " /* get the register(s): */"
1783: echo -n " ireg_dq = TME_M68K_IREG_D0 + "
1784: if test $size = s; then
1785: echo "TME_M68K_INSN_OP0(tme_uint32_t);"
1786: else
1787: echo "TME_FIELD_EXTRACTU(TME_M68K_INSN_SPECOP, 12, 3);"
1788: echo " ireg_dr = TME_M68K_IREG_D0 + TME_FIELD_EXTRACTU(TME_M68K_INSN_SPECOP, 0, 3);"
1789: fi
1790:
1791: echo ""
1792: echo " /* form the dividend and the divisor: */"
1793: if test $large = 64; then
1794: echo " if (TME_M68K_INSN_SPECOP & TME_BIT(10)) {"
1795: echo " dividend = (tme_${sign}int${large}_t)"
1796: echo " ((((tme_uint${large}_t) ic->tme_m68k_ireg_uint32(ireg_dr)) << 32)"
1797: echo " | ic->tme_m68k_ireg_uint32(ireg_dq));"
1798: echo " }"
1799: echo " else"
1800: echo -n " "
1801: fi
1802: echo " dividend = (tme_${sign}int${large}_t) ic->tme_m68k_ireg_${sign}int32(ireg_dq);"
1803: echo " divisor = TME_M68K_INSN_OP1(tme_${sign}int${small}_t);"
1804: echo " if (divisor == 0) {"
1805: echo " ic->tme_m68k_ireg_pc = ic->tme_m68k_ireg_pc_next;"
1806: echo " TME_M68K_INSN_EXCEPTION(TME_M68K_EXCEPTION_GROUP2(5));"
1807: echo " }"
1808:
1809: echo ""
1810: echo " /* do the division: */"
1811: echo " quotient = dividend / divisor;"
1812: echo " remainder = dividend % divisor;"
1813:
1814: echo ""
1815: echo " /* set the flags and return the quotient and remainder: */"
1816: echo " flags = ic->tme_m68k_ireg_ccr & TME_M68K_FLAG_X;"
1.1.1.2 ! root 1817: echo -n " if ("
! 1818: case "${small}${_sign}" in
! 1819: 16s) echo -n "quotient > 0x7fff || quotient < -32768" ;;
! 1820: 16u) echo -n "quotient > 0xffff" ;;
! 1821: 32s) echo -n "quotient > 0x7fffffffL || quotient < ((0L - 0x7fffffffL) - 1L)" ;;
! 1822: 32u) echo -n "quotient > 0xffffffffUL" ;;
! 1823: esac
1.1 root 1824: echo ") {"
1825: echo " flags |= TME_M68K_FLAG_V;"
1826: echo " }"
1827: echo " else {"
1828: echo " if (((tme_int${small}_t) quotient) < 0) flags |= TME_M68K_FLAG_N;"
1829: echo " if (quotient == 0) flags |= TME_M68K_FLAG_Z;"
1830: echo " ic->tme_m68k_ireg_${sign}int${small}(ireg_dq${reg_size_shift}) = (tme_${sign}int${small}_t) quotient;"
1831: if test $small = 16; then
1832: echo " ic->tme_m68k_ireg_${sign}int${small}((ireg_dq${reg_size_shift}) + 1) = remainder;"
1833: else
1834: echo " if (ireg_dr != ireg_dq) {"
1835: echo " ic->tme_m68k_ireg_${sign}int${small}(ireg_dr) = remainder;"
1836: echo " }"
1837: fi
1838: echo " }"
1839: echo " ic->tme_m68k_ireg_ccr = flags;"
1840:
1841: echo ""
1842: echo " TME_M68K_INSN_OK;"
1843: if test $large = 64; then
1.1.1.2 ! root 1844: echo "#endif /* TME_HAVE_INT${large}_T */"
1.1 root 1845: fi
1846: echo "}"
1847:
1848: done
1849: done
1850:
1851: # done:
1852: exit 0
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