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- /* Subroutines for insn-output.c for MIL-STD-1750A.
- Copyright (C) 1994 Free Software Foundation, Inc.
- Contributed by O.M.Kellogg, Deutsche Aerospace (okellogg@salyko.cube.net).
-
- This file is part of GNU CC.
-
- GNU CC is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or (at your option)
- any later version.
-
- GNU CC is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU CC; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #ifndef FILE
- #include <stdio.h>
- #endif
-
- #define __datalbl
- #include "config.h"
- #include "rtl.h"
- #include "tree.h"
- #include "expr.h"
- #define HAVE_cc0
- #include "conditions.h"
- #include "real.h"
-
- struct datalabel_array datalbl[DATALBL_ARRSIZ];
- int datalbl_ndx = -1;
- struct jumplabel_array jmplbl[JMPLBL_ARRSIZ];
- int jmplbl_ndx = -1;
- int label_pending = 0, program_counter = 0;
- enum section current_section=NREL;
- char *sectname[4] = { "NREL","IREL","KREL","SREL" };
-
- int notice_update_cc(exp)
- rtx exp;
- {
- if (GET_CODE (exp) == SET)
- {
- enum rtx_code src_code = GET_CODE (SET_SRC (exp));
- /* Jumps do not alter the cc's. */
- if (SET_DEST (exp) == pc_rtx)
- return;
- /* Moving register into memory doesn't alter the cc's.
- It may invalidate the RTX's which we remember the cc's came from. */
- if (GET_CODE (SET_DEST (exp)) == MEM)
- {
- if (cc_status.value1 && GET_CODE (cc_status.value1) == MEM)
- cc_status.value1 = 0;
- if (cc_status.value2 && GET_CODE (cc_status.value2) == MEM)
- cc_status.value2 = 0;
- return;
- }
- /* Function calls clobber the cc's. */
- else if (src_code == CALL)
- {
- CC_STATUS_INIT;
- return;
- }
- /* Emulated longword bit-ops leave cc's incorrect */
- else if (GET_MODE (SET_DEST (exp)) == HImode ?
- src_code == AND || src_code == IOR ||
- src_code == XOR || src_code == NOT : 0)
- {
- CC_STATUS_INIT;
- return;
- }
- /* Tests and compares set the cc's in predictable ways. */
- else if (SET_DEST (exp) == cc0_rtx)
- {
- CC_STATUS_INIT;
- cc_status.value1 = SET_SRC (exp);
- return;
- }
- /* Anything that lands in a reg will set cc_status. */
- else if (REG_P (SET_DEST (exp)))
- {
- cc_status.flags = CC_NO_OVERFLOW;
- cc_status.value1 = SET_SRC (exp);
- cc_status.value2 = SET_DEST (exp);
- return;
- }
- else
- {
- CC_STATUS_INIT;
- }
- }
- else if (GET_CODE (exp) == PARALLEL
- && GET_CODE (XVECEXP (exp, 0, 0)) == SET)
- {
- if (SET_DEST (XVECEXP (exp, 0, 0)) == pc_rtx)
- return;
- if (SET_DEST (XVECEXP (exp, 0, 0)) == cc0_rtx)
- {
- CC_STATUS_INIT;
- cc_status.value1 = SET_SRC (XVECEXP (exp, 0, 0));
- return;
- }
- CC_STATUS_INIT;
- }
- else
- {
- CC_STATUS_INIT;
- }
- }
-
-
- rtx function_arg(cum,mode,type,named)
- int cum;
- enum machine_mode mode;
- tree type;
- int named;
- {
- int size;
- rtx result;
-
- if (MUST_PASS_IN_STACK(mode,type))
- return (rtx) 0;
- if (mode == BLKmode)
- size = int_size_in_bytes(type);
- else
- size = GET_MODE_SIZE (mode);
- if (cum + size < 12)
- return gen_rtx(REG, mode, cum);
- else
- return (rtx) 0;
- }
-
-
- char *tekasm_float(exp_char,value)
- char exp_char;
- double value;
- {
- extern char *strpbrk();
- int found_letter = 0;
- char *p;
- static char fbuf[20];
-
- sprintf(fbuf,"%g",value);
- if ((p = strpbrk(fbuf,"Ee")) == NULL)
- sprintf(fbuf+strlen(fbuf),"%c0",exp_char);
- else
- *p = exp_char;
- return fbuf;
- }
-
- char *asm_float_syntax(rtx x)
- {
- if (GET_MODE(x) == HFmode)
- {
- union { double d; int i[2]; } du;
- union { float f; int i; } su;
- du.i[0] = CONST_DOUBLE_LOW(x);
- du.i[1] = CONST_DOUBLE_HIGH(x);
- su.f = (float) du.d;
- return tekasm_float('E',su.f);
- }
- else
- {
- union { double d; int i[2]; } du;
- du.i[0] = CONST_DOUBLE_LOW(x);
- du.i[1] = CONST_DOUBLE_HIGH(x);
- return tekasm_float('D',du.d);
- }
- }
-
- char *float_label(char code,char *fltstr)
- {
- int i=1;
- static char label[32];
-
- label[0] = code;
- while (*fltstr)
- {
- label[i] = (*fltstr == '+') ? 'p' :
- (*fltstr == '-') ? 'm' : *fltstr;
- i++;
- fltstr++;
- }
- if (i > 11)
- i = 11;
- label[i] = '\0';
- return label;
- }
-
-
- char *movcnt_regno_adjust(rtx *op)
- {
- static char outstr[40];
- int cntreg = REGNO(op[2]), cntreg_1750 = REGNO(op[0]) + 1;
- int dstreg = REGNO(op[0]), srcreg = REGNO(op[1]);
-
- if (cntreg == cntreg_1750)
- sprintf(outstr,"MOV R%%0,R%%1");
- else if (dstreg+1 == srcreg && srcreg == cntreg+2)
- sprintf(outstr,"XWR R%d,R%d\n\tMOV R%%0,R%%1",cntreg,dstreg);
- else if (dstreg+1 == srcreg && srcreg < cntreg)
- sprintf(outstr,"XWR R%d,R%d\n\tMOV R%%0,R%%1",srcreg,cntreg);
- else if (srcreg+1 == cntreg && dstreg > cntreg)
- sprintf(outstr,"XWR R%d,R%d\n\tMOV R%%0,R%%1",srcreg,dstreg);
- else
- sprintf(outstr,"XWR R%d,R%d\n\tMOV R%%0,%%1\n\tXWR R%d,R%d",
- cntreg,cntreg_1750,cntreg_1750,cntreg);
- return outstr;
- }
-
- char *mod_regno_adjust(char *instr,rtx *op)
- {
- static char outstr[40];
- char *r = (!strncmp(instr,"DVR",3) ? "R" : "");
- int modregno_gcc = REGNO(op[3]), modregno_1750 = REGNO(op[0]) + 1;
-
- if (modregno_gcc == modregno_1750)
- sprintf(outstr,"%s R%%0,%s%%2",instr,r);
- else
- sprintf(outstr,"LR R%d,R%d\n\t%s R%%0,%s%%2\n\tXWR R%d,R%d",
- modregno_gcc,modregno_1750,instr,r,modregno_1750,modregno_gcc);
- return outstr;
- }
-
-
- /* Auxiliary to `nonindirect_operand':
- Check if op is a valid memory operand for 1750A arith./logic (non-move)
- instructions. */
- int memop_valid(register rtx op)
- {
- if (GET_MODE(op) != Pmode && GET_MODE(op) != VOIDmode)
- return 0;
- switch (GET_CODE(op))
- {
- case MEM:
- case MINUS:
- case MULT:
- case DIV:
- return 0;
- case PLUS:
- if (! memop_valid(XEXP(op,0)))
- return 0;
- return memop_valid(XEXP(op,1));
- case REG:
- if (REGNO(op) > 0)
- return 1;
- return 0;
- case CONST:
- case CONST_INT:
- case SYMBOL_REF:
- case SUBREG:
- return 1;
- default:
- printf("memop_valid: code=%d\n",(int) GET_CODE(op));
- return 1;
- }
- }
-
- /* extra predicate for recog: */
- int nonindirect_operand(register rtx op, enum machine_mode mode)
- {
- int retval;
-
- switch (GET_CODE(op))
- {
- case MEM:
- retval = memop_valid(XEXP(op,0));
- return retval;
- case REG:
- return 1;
- default:
- if (! CONSTANT_P(op))
- return 0;
- }
- return 1;
- }
-
- /* predicate for the STC instruction: */
- int small_nonneg_const(register rtx op, enum machine_mode mode)
- {
- if (GET_CODE(op) == CONST_INT && INTVAL(op) >= 0 && INTVAL(op) <= 15)
- return 1;
- return 0;
- }
-
- /* Decide whether to output a conditional jump as a "Jump Conditional"
- or as a "Branch Conditional": */
-
- int find_jmplbl(int labelnum)
- {
- int i, found = 0;
-
- for (i = 0; i <= jmplbl_ndx; i++)
- if (labelnum == jmplbl[i].num)
- {
- found = 1;
- break;
- }
- if (found)
- return i;
- return -1;
- }
-
- char *branch_or_jump(char *condition, int targetlabel_number)
- {
- static char buf[30];
- int index;
-
- if ((index = find_jmplbl(targetlabel_number)) >= 0)
- if (program_counter - jmplbl[index].pc < 128)
- {
- sprintf(buf,"B%s %%l0",condition);
- return buf;
- }
- sprintf(buf,"JC %s,%%l0",condition);
- return buf;
- }
-
-
-
- /* The PRINT_OPERAND and PRINT_OPERAND_ADDRESS macros have been
- made functions: */
-
- print_operand(file, x, code)
- FILE *file;
- rtx x;
- enum rtx_code code;
- {
- switch (GET_CODE(x))
- {
- case REG:
- fprintf (file, "%d",REGNO (x));
- break;
- case SYMBOL_REF:
- fprintf(file,"%s",XSTR(x,0));
- break;
- case LABEL_REF:
- case CONST:
- case MEM:
- output_address(XEXP(x,0));
- break;
- case CONST_DOUBLE:
- if (code == 'D' || code == 'E') /* KREL output hack: */
- { /* make a label out of a floating-point number. */
- char *fltstr = (char *)asm_float_syntax(x);
- int i, found = 0;
- for (i = 0; i <= datalbl_ndx; i++)
- if (strcmp(fltstr,datalbl[i].value) == 0) { found = 1; break; }
- if (! found)
- {
- strcpy(datalbl[i = ++datalbl_ndx].value,fltstr);
- strcpy(datalbl[i].name,(char *)float_label(code,fltstr));
- datalbl[i].size = (code=='D') ? 3 : 2;
- check_section(KREL);
- fprintf(file,"K%s \tDATAF %s ;p_o\n", datalbl[i].name,fltstr);
- check_section(NREL);
- }
- }
- else if (code == 'F')
- {
- char *fltstr = (char *)asm_float_syntax(x);
- int i, found = 0;
- for (i = 0; i <= datalbl_ndx; i++)
- if (strcmp(fltstr,datalbl[i].value) == 0)
- {
- found = 1;
- break;
- }
- if (! found)
- {
- printf("Aborting: 'F' float label not found in datalbl[].\n");
- abort();
- }
- fprintf(file,"%s ;P_O 'F'",datalbl[i].name);
- }
- else
- fprintf(file,"%s ;P_O cst_dbl",(char *)asm_float_syntax(x));
- break;
- case CONST_INT:
- if (code == 'J')
- fprintf (file, "%d",-INTVAL(x));
- else if (INTVAL(x) > 0x7FFF)
- fprintf (file, "%d ; range correction (val>0x7FFF) applied",
- INTVAL(x) - 0x10000);
- else
- fprintf (file, "%d", INTVAL(x));
- break;
- case CODE_LABEL:
- fprintf (file, "L%d", XINT(x,3));
- break;
- case CALL:
- fprintf(file,"CALL nargs=%d, func is either '%s' or '%s'",
- XEXP(x,1),XSTR(XEXP(XEXP(x,0),1),0),XSTR(XEXP(x,0),1));
- break;
- case PLUS:
- {
- rtx op0 = XEXP(x,0), op1 = XEXP(x,1);
- int op0code=GET_CODE(op0), op1code=GET_CODE(op1);
- if (op1code == CONST_INT)
- switch (op0code)
- {
- case REG:
- fprintf(file,"%d,R%d ; p_o_PLUS for REG and CONST",
- INTVAL(op1),REGNO(op0));
- break;
- case SYMBOL_REF:
- fprintf(file,"%d+%s",INTVAL(op1),XSTR(op0,0));
- break;
- case MEM:
- fprintf(file,"%d,[mem:",INTVAL(op1));
- output_address(XEXP(op0,0));
- fprintf(file,"] ;P_O plus");
- break;
- default:
- fprintf(file,"p_o_PLUS UFO, code=%d, with CONST=%d",
- (int)op0code,INTVAL(op1));
- }
- else if (op1code == SYMBOL_REF && op0code == REG)
- fprintf(file,"%s,R%d ; P_O: (plus reg sym)",
- XSTR(op1,0),REGNO(op0));
- else
- fprintf(file,"p_o_+: op0code=%d, op1code=%d",op0code,op1code);
- }
- break;
- default:
- fprintf (file, "p_o_UFO code=%d", GET_CODE(x));
- }
- }
-
- print_operand_address(file, addr)
- FILE *file;
- rtx addr;
- {
- switch (GET_CODE (addr))
- {
- case REG:
- fprintf (file, "0,R%d ; P_O_A", REGNO (addr));
- break;
- case PLUS:
- {
- register rtx x = XEXP(addr,0), y = XEXP(addr,1);
- switch (GET_CODE(x))
- {
- case REG:
- switch (GET_CODE(y))
- {
- case CONST:
- output_address(XEXP(y,0));
- fprintf(file, ",R%d ;P_O_A reg + const expr",REGNO(x));
- break;
- case CONST_INT:
- fprintf(file,"%d,R%d ; P_O_A reg + const_int",
- INTVAL(y),REGNO(x));
- break;
- case SYMBOL_REF:
- fprintf(file,"%s,R%d ; P_O_A reg + sym",
- XSTR(y,0),REGNO(x));
- break;
- default:
- fprintf(file, "[P_O_A reg%d+UFO code=%d]",
- REGNO(x),GET_CODE(y));
- }
- break;
- case LABEL_REF:
- case SYMBOL_REF:
- switch (GET_CODE(y))
- {
- case CONST_INT:
- fprintf (file,"%d+%s",INTVAL(y),XSTR(x,0));
- break;
- case REG:
- fprintf (file,"%s,R%d ;P_O_A sym + reg",
- XSTR(x,0),REGNO(y));
- break;
- default:
- fprintf(file, "P_O_A sym/lab+UFO[sym=%s,code(y)=%d]",
- XSTR(x,0),GET_CODE(y));
- }
- break;
- case CONST:
- output_address(XEXP(x,0));
- if (GET_CODE(y) == REG)
- fprintf(file, ",R%d ;P_O_A const + reg",REGNO(x));
- else
- fprintf(file,"P_O_A const+UFO code(y)=%d]",GET_CODE(y));
- break;
- case MEM:
- output_address(y);
- fprintf(file, ",[mem:");
- output_address(XEXP(x,0));
- fprintf(file, "] ;P_O_A plus");
- break;
- default:
- fprintf(file, "P_O_A plus op1_UFO[code1=%d,code2=%d]",
- GET_CODE(x),GET_CODE(y));
- }
- }
- break;
- case CONST_INT:
- if (INTVAL(addr) < 0x10000 && INTVAL(addr) >= -0x10000)
- fprintf (file, "%d ; p_o_a const addr?!", INTVAL(addr));
- else
- {
- fprintf(file,"[p_o_a=ILLEGAL_CONST]");
- output_addr_const (file, addr);
- }
- break;
- case LABEL_REF:
- case SYMBOL_REF:
- fprintf(file,"%s",XSTR(addr,0));
- break;
- case MEM:
- fprintf(file,"[memUFO:");
- output_address(XEXP(addr,0));
- fprintf(file,"]");
- break;
- case CONST:
- output_address(XEXP(addr,0));
- fprintf(file," ;P_O_A const");
- break;
- default:
- fprintf(file," p_o_a UFO, code=%d val=0x%x",
- (int) GET_CODE(addr),INTVAL(addr));
- break;
- }
- }
-
-