65c2a8a0ae
This feature has never been used since its introduction, more than 3 years ago, in David Given's commitc93cb69of May 8, 2013. The commit was for "PowerPC and M68K work". I am not undoing the entire commit. I am only removing the stackadjust and stackoffset() feature. This commit removes the feature from my branch kernigh-linuxppc. This removal includes the mach/proto/ncg parts. The default branch already removed most of the feature, but kept the mach/proto/ncg parts. That removal happened in commit81778b6of May 13, 2013 (which was a merge; git diffaf0dede81778b6). The branch dtrg-experimental-powerpc merged the default branch but without the removal. That merge was commit4703db0fof Sep 15, 2016 (git diff8c94b134703db0). My branch kernigh-linuxppc is off branch dtrg-experimental-powerpc, so I can no longer get the removal by merging default. David Given described the stackadjust feature in https://sourceforge.net/p/tack/mailman/message/30814691/ The instruction stackadjust would add a value to the offset, and the function stackoffset() would return this offset. One would use this to track sp - fp, then omit the frame pointer by not keeping fp in a register.
167 lines
4.2 KiB
C
167 lines
4.2 KiB
C
/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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/* $Id$ */
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/* offsets of interesting fields in EM-pattern */
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#define PO_HASH 0
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#define PO_NEXT 1
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#define PO_MATCH 3
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#define ILLHASH 0177777
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/* Commands for codegenerator, in low order 5 bits of byte */
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#define DO_NEXTEM 0
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#define DO_MATCH 1
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#define DO_XMATCH 2
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#define DO_XXMATCH 3
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#define DO_REMOVE 4
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#define DO_DEALLOCATE 5
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#define DO_REALLOCATE 6
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#define DO_ALLOCATE 7
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#define DO_MOVE 10
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#define DO_ERASE 11
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#define DO_TOKREPLACE 12
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#define DO_EMREPLACE 13
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#define DO_COST 14
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#define DO_RETURN 15
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#define DO_COERC 16
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#define DO_PRETURN 17
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#define DO_RREMOVE 18
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#define DO_INSTR 19
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#define DO_TEST 20
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#define DO_DLINE 21
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#define DO_SETCC 22
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#define DO_TOSTACK 23
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#define DO_KILLREG 24
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#define DO_LABDEF 25
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#ifndef MAXATT
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#define MAXATT TOKENSIZE
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#endif
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typedef struct instance {
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short in_which;
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# define IN_COPY 1
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# define IN_MEMB 2
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# define IN_RIDENT 3
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# define IN_ALLOC 4
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# define IN_DESCR 5
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# define IN_S_DESCR 6
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# define IN_D_DESCR 7
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short in_info[MAXATT+1];
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} inst_t,*inst_p;
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typedef struct set {
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short set_size;
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short set_val[SETSIZE];
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} set_t,*set_p;
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typedef struct {
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short m_set1; /* number of tokenexpr in move: from */
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short m_expr1; /* optional expression */
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short m_set2; /* number of tokenexpr in move: to */
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short m_expr2; /* optional expression */
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short m_cindex; /* code index to really do it */
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} move_t, *move_p;
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typedef struct {
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short t_set; /* number of tokenexpr in test */
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short t_expr; /* optional expression */
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short t_cindex; /* code index to really do it */
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} test_t, *test_p;
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struct exprnode {
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short ex_operator;
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short ex_lnode;
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short ex_rnode;
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};
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typedef struct exprnode node_t;
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typedef struct exprnode *node_p;
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/*
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* contents of .ex_operator
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*/
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#define EX_TOKFIELD 0
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#define EX_ARG 1
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#define EX_CON 2
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#define EX_ALLREG 3
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#define EX_SAMESIGN 4
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#define EX_SFIT 5
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#define EX_UFIT 6
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#define EX_ROM 7
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#define EX_NCPEQ 8
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#define EX_SCPEQ 9
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#define EX_RCPEQ 10
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#define EX_NCPNE 11
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#define EX_SCPNE 12
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#define EX_RCPNE 13
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#define EX_NCPGT 14
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#define EX_NCPGE 15
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#define EX_NCPLT 16
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#define EX_NCPLE 17
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#define EX_OR2 18
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#define EX_AND2 19
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#define EX_PLUS 20
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#define EX_CAT 21
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#define EX_MINUS 22
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#define EX_TIMES 23
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#define EX_DIVIDE 24
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#define EX_MOD 25
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#define EX_LSHIFT 26
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#define EX_RSHIFT 27
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#define EX_NOT 28
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#define EX_COMP 29
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#define EX_STRING 31
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#define EX_DEFINED 32
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#define EX_SUBREG 33
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#define EX_TOSTRING 34
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#define EX_UMINUS 35
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#define EX_REG 36
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#define EX_LOWW 37
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#define EX_HIGHW 38
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#define EX_INREG 39
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#define EX_REGVAR 40
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#define EX_OR 41
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#define EX_XOR 42
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#define EX_AND 43
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#define EX_ISROM 44
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#define EX_TOPELTSIZE 45
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#define EX_FALLTHROUGH 46
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typedef struct { /* to stack coercions */
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short c1_texpno; /* token expression number */
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short c1_expr; /* boolean expression */
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short c1_prop; /* property of register needed */
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short c1_codep; /* code index */
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} c1_t,*c1_p;
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#ifdef MAXSPLIT
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typedef struct { /* splitting coercions */
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short c2_texpno; /* token expression number */
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short c2_expr; /* optional boolean expression */
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short c2_nsplit; /* split factor */
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short c2_repl[MAXSPLIT];/* replacement instances */
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short c2_codep; /* code index */
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} c2_t,*c2_p;
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#endif /* MAXSPLIT */
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typedef struct { /* one to one coercions */
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short c3_texpno; /* token expression number */
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short c3_expr; /* boolean expression */
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short c3_prop; /* property of register needed */
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short c3_repl; /* replacement instance */
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short c3_codep; /* code index */
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} c3_t,*c3_p;
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#define getint(a,b) \
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if ((a=((*(b)++)&BMASK)) >= 128) {\
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a = ((a-128)<<BSHIFT) | (*(b)++&BMASK); \
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}
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