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https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
65646555b2
Currently, trying to declare single letter variables in Blackfin assembly
can sometimes lead to parser errors if that letter is used for insn flags.
For example, X, Z, S, M, and T are used to change the behavior of insns:
R0 = 1; R0 = 1 (X); R0 = 1 (Z);
But the current parser just looks for single letter tokens rather than
ones that show up in the (FLAGS) field. So only match these letters as
flags when they're in parentheses.
Not a complete fix, but it at least lets gcc tests pass now (the test
gcc/testsuite/gcc.c-torture/compile/mangle-1.c to be exact). A complete
fix would require a significant parser rewrite in order to handle:
R0 = (x) (x); /* zero extend the address of the symbol "x" */
R0 = W; R0 = W[P0];
Signed-off-by: Steve Kilbane <steve.kilbane@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
559 lines
19 KiB
Plaintext
559 lines
19 KiB
Plaintext
/* bfin-lex.l ADI Blackfin lexer
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Copyright 2005, 2006, 2007, 2008, 2010
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Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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%{
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#include "as.h"
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#include "bfin-defs.h"
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#include "bfin-parse.h"
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static long parse_int (char **end);
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static int parse_halfreg (Register *r, int cl, char *hr);
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static int parse_reg (Register *r, int type, char *rt);
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int yylex (void);
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#define _REG yylval.reg
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%}
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/* Define Start States ... Actually we will use exclusion.
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If no start state is specified it should match any state
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and <INITIAL> would match some keyword rules only with
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initial. */
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%s KEYWORD
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%s FLAGS
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%%
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[sS][fF][tT][rR][eE][sS][eE][tT] _REG.regno = REG_sftreset; return REG;
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[oO][mM][oO][dD][eE] _REG.regno = REG_omode; return REG;
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[iI][dD][lL][eE]_[rR][eE][qQ] _REG.regno = REG_idle_req; return REG;
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[hH][wW][eE][rR][rR][cC][aA][uU][sS][eE] _REG.regno = REG_hwerrcause; return REG;
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[eE][xX][cC][aA][uU][sS][eE] _REG.regno = REG_excause; return REG;
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[eE][mM][uU][cC][aA][uU][sS][eE] _REG.regno = REG_emucause; return REG;
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<FLAGS>[zZ] return Z;
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<FLAGS>[xX] return X;
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[wW]32 yylval.value = M_W32; return MMOD;
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[wW] return W;
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[vV][iI][tT]_[mM][aA][xX] return VIT_MAX;
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[vV] return V; /* Special: V is a statflag and a modifier. */
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[uU][sS][pP] _REG.regno = REG_USP; return REG;
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[tT][lL] return TL;
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[tT][hH] return TH;
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[tT][fF][uU] yylval.value = M_TFU; return MMOD;
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[tT][eE][sS][tT][sS][eE][tT] return TESTSET;
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<FLAGS>[tT] yylval.value = M_T; return MMOD;
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<FLAGS>[sS] return S;
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[sS][yY][sS][cC][fF][gG] _REG.regno = REG_SYSCFG; return REG;
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[sS][tT][iI] return STI;
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[sS][sS][yY][nN][cC] return SSYNC;
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[sS][pP]"."[lL] _REG.regno = REG_SP; _REG.flags = F_REG_LOW; return HALF_REG;
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[sS][pP]"."[hH] _REG.regno = REG_SP; _REG.flags = F_REG_HIGH; return HALF_REG;
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[sS][pP] _REG.regno = REG_SP; return REG;
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[sS][iI][gG][nN][bB][iI][tT][sS] return SIGNBITS;
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[sS][iI][gG][nN] return SIGN;
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[sS][eE][qQ][sS][tT][aA][tT] _REG.regno = REG_SEQSTAT; return REG;
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[sS][eE][aA][rR][cC][hH] return SEARCH;
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[sS][hH][iI][fF][tT] return SHIFT;
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[sS][cC][oO] return SCO;
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[sS][aA][aA] return SAA;
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[sS]2[rR][nN][dD] yylval.value = M_S2RND; return MMOD;
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[rR][tT][xX] return RTX;
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[rR][tT][sS] return RTS;
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[rR][tT][nN] return RTN;
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[rR][tT][iI] return RTI;
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[rR][tT][eE] return RTE;
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[rR][oO][tT] return ROT;
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[rR][nN][dD]20 return RND20;
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[rR][nN][dD]12 return RND12;
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[rR][nN][dD][lL] return RNDL;
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[rR][nN][dD][hH] return RNDH;
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[rR][nN][dD] return RND;
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[rR][0-7]"."[lLhHbB] return parse_halfreg(&yylval.reg, T_REG_R, yytext);
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[rR][eE][tT][sS] _REG.regno = REG_RETS; return REG;
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[rR][eE][tT][iI] _REG.regno = REG_RETI; return REG;
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[rR][eE][tT][xX] _REG.regno = REG_RETX; return REG;
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[rR][eE][tT][nN] _REG.regno = REG_RETN; return REG;
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[rR][eE][tT][eE] _REG.regno = REG_RETE; return REG;
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[eE][mM][uU][dD][aA][tT] _REG.regno = REG_EMUDAT; return REG;
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[rR][aA][iI][sS][eE] return RAISE;
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[rR][0-7] return parse_reg (&yylval.reg, T_REG_R, yytext);
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[rR] return R;
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[pP][rR][nN][tT] return PRNT;
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[pP][cC] return PC;
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[pP][aA][cC][kK] return PACK;
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[pP][0-5]"."[lLhH] return parse_halfreg (&yylval.reg, T_REG_P, yytext);
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[pP][0-5] return parse_reg (&yylval.reg, T_REG_P, yytext);
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[oO][uU][tT][cC] return OUTC;
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[oO][nN][eE][sS] return ONES;
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[nN][oO][tT] return NOT;
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[nN][oO][pP] return NOP;
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[mM][nN][oO][pP] return MNOP;
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[nN][sS] return NS;
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[mM][iI][nN] return MIN;
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[mM][aA][xX] return MAX;
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[mM][0-3]"."[lLhH] return parse_halfreg (&yylval.reg, T_REG_M, yytext);
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[mM][0-3] return parse_reg (&yylval.reg, T_REG_M, yytext);
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<FLAGS>[mM] return M;
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[lL][tT] return LT;
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[lL][sS][hH][iI][fF][tT] return LSHIFT;
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[lL][sS][eE][tT][uU][pP] return LSETUP;
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[lL][oO][oO][pP] return LOOP;
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[lL][oO][oO][pP]_[bB][eE][gG][iI][nN] return LOOP_BEGIN;
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[lL][oO][oO][pP]_[eE][nN][dD] return LOOP_END;
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[lL][eE] return LE;
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[lL][cC]0 _REG.regno = REG_LC0; return REG;
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[lL][tT]0 _REG.regno = REG_LT0; return REG;
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[lL][bB]0 _REG.regno = REG_LB0; return REG;
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[lL][cC]1 _REG.regno = REG_LC1; return REG;
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[lL][tT]1 _REG.regno = REG_LT1; return REG;
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[lL][bB]1 _REG.regno = REG_LB1; return REG;
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[lL][0-3]"."[lLhH] return parse_halfreg (&yylval.reg, T_REG_L, yytext);
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[lL][0-3] return parse_reg (&yylval.reg, T_REG_L, yytext);
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[lL][oO] return LO;
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[jJ][uU][mM][pP]"."[sS] { BEGIN 0; return JUMP_DOT_S;}
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[jJ][uU][mM][pP]"."[lL] { BEGIN 0; return JUMP_DOT_L;}
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[jJ][uU][mM][pP] { BEGIN 0; return JUMP;}
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[jJ][uU][mM][pP]"."[xX] { BEGIN 0; return JUMP_DOT_L; }
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[iI][uU] yylval.value = M_IU; return MMOD;
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[iI][sS][sS]2 yylval.value = M_ISS2; return MMOD;
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[iI][sS] yylval.value = M_IS; return MMOD;
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[iI][hH] yylval.value = M_IH; return MMOD;
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[iI][fF] return IF;
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[iI][0-3]"."[lLhH] return parse_halfreg (&yylval.reg, T_REG_I, yytext);
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[iI][0-3] return parse_reg (&yylval.reg, T_REG_I, yytext);
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[hH][lL][tT] return HLT;
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[hH][iI] return HI;
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[gG][tT] return GT;
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[gG][eE] return GE;
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[fF][uU] yylval.value = M_FU; return MMOD;
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[fF][pP] _REG.regno = REG_FP; return REG;
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[fF][pP]"."[lL] _REG.regno = REG_FP; _REG.flags = F_REG_LOW; return HALF_REG;
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[fF][pP]"."[hH] _REG.regno = REG_FP; _REG.flags = F_REG_HIGH; return HALF_REG;
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[eE][xX][tT][rR][aA][cC][tT] return EXTRACT;
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[eE][xX][pP][aA][dD][jJ] return EXPADJ;
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[eE][xX][cC][pP][tT] return EXCPT;
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[eE][mM][uU][eE][xX][cC][pP][tT] return EMUEXCPT;
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[dD][iI][vV][sS] return DIVS;
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[dD][iI][vV][qQ] return DIVQ;
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[dD][iI][sS][aA][lL][gG][nN][eE][xX][cC][pP][tT] return DISALGNEXCPT;
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[dD][eE][pP][oO][sS][iI][tT] return DEPOSIT;
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[dD][bB][gG][hH][aA][lL][tT] return DBGHALT;
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[dD][bB][gG][cC][mM][pP][lL][xX] return DBGCMPLX;
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[dD][bB][gG][aA][lL] return DBGAL;
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[dD][bB][gG][aA][hH] return DBGAH;
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[dD][bB][gG][aA] return DBGA;
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[dD][bB][gG] return DBG;
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[cC][yY][cC][lL][eE][sS]2 { _REG.regno = REG_CYCLES2; return REG; }
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[cC][yY][cC][lL][eE][sS] { _REG.regno = REG_CYCLES; return REG; }
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[cC][sS][yY][nN][cC] return CSYNC;
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[cC][oO] return CO;
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[cC][lL][iI] return CLI;
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[cC][cC] _REG.regno = REG_CC; return CCREG;
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[cC][aA][lL][lL]"."[xX] { BEGIN 0; return CALL;}
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[cC][aA][lL][lL] { BEGIN 0; return CALL;}
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[bB][yY][tT][eE][uU][nN][pP][aA][cC][kK] return BYTEUNPACK;
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[bB][yY][tT][eE][pP][aA][cC][kK] return BYTEPACK;
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[bB][yY][tT][eE][oO][pP]16[mM] return BYTEOP16M;
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[bB][yY][tT][eE][oO][pP]16[pP] return BYTEOP16P;
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[bB][yY][tT][eE][oO][pP]3[pP] return BYTEOP3P;
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[bB][yY][tT][eE][oO][pP]2[mM] return BYTEOP2M;
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[bB][yY][tT][eE][oO][pP]2[pP] return BYTEOP2P;
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[bB][yY][tT][eE][oO][pP]1[pP] return BYTEOP1P;
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[bB][yY] return BY;
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[bB][xX][oO][rR][sS][hH][iI][fF][tT] return BXORSHIFT;
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[bB][xX][oO][rR] return BXOR;
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[bB][rR][eE][vV] return BREV;
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[bB][pP] return BP;
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[bB][iI][tT][tT][sS][tT] return BITTST;
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[bB][iI][tT][tT][gG][lL] return BITTGL;
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[bB][iI][tT][sS][eE][tT] return BITSET;
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[bB][iI][tT][mM][uU][xX] return BITMUX;
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[bB][iI][tT][cC][lL][rR] return BITCLR;
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[bB][0-3]"."[lLhH] return parse_halfreg (&yylval.reg, T_REG_B, yytext);
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[bB][0-3] return parse_reg (&yylval.reg, T_REG_B, yytext);
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[bB] return B;
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[aA][zZ] _REG.regno = S_AZ; return STATUS_REG;
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[aA][nN] _REG.regno = S_AN; return STATUS_REG;
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[aA][cC]0_[cC][oO][pP][yY] _REG.regno = S_AC0_COPY; return STATUS_REG;
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[vV]_[cC][oO][pP][yY] _REG.regno = S_V_COPY; return STATUS_REG;
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[aA][qQ] _REG.regno = S_AQ; return STATUS_REG;
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[aA][cC]0 _REG.regno = S_AC0; return STATUS_REG;
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[aA][cC]1 _REG.regno = S_AC1; return STATUS_REG;
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[aA][vV]0 _REG.regno = S_AV0; return STATUS_REG;
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[aA][vV]0[sS] _REG.regno = S_AV0S; return STATUS_REG;
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[aA][vV]1 _REG.regno = S_AV1; return STATUS_REG;
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[aA][vV]1[sS] _REG.regno = S_AV1S; return STATUS_REG;
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[vV][sS] _REG.regno = S_VS; return STATUS_REG;
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[rR][nN][dD]_[mM][oO][dD] _REG.regno = S_RND_MOD; return STATUS_REG;
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[aA][sS][tT][aA][tT] _REG.regno = REG_ASTAT; return REG;
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[aA][sS][hH][iI][fF][tT] return ASHIFT;
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[aA][sS][lL] return ASL;
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[aA][sS][rR] return ASR;
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[aA][lL][iI][gG][nN]8 return ALIGN8;
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[aA][lL][iI][gG][nN]16 return ALIGN16;
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[aA][lL][iI][gG][nN]24 return ALIGN24;
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[aA]1"."[lL] return A_ONE_DOT_L;
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[aA]0"."[lL] return A_ZERO_DOT_L;
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[aA]1"."[hH] return A_ONE_DOT_H;
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[aA]0"."[hH] return A_ZERO_DOT_H;
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[aA][bB][sS] return ABS;
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[aA][bB][oO][rR][tT] return ABORT;
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[aA]1"."[xX] _REG.regno = REG_A1x; return REG;
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[aA]1"."[wW] _REG.regno = REG_A1w; return REG;
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[aA]1 _REG.regno = REG_A1; return REG_A_DOUBLE_ONE;
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[aA]0"."[xX] _REG.regno = REG_A0x; return REG;
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[aA]0"."[wW] _REG.regno = REG_A0w; return REG;
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[aA]0 _REG.regno = REG_A0; return REG_A_DOUBLE_ZERO;
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[Gg][Oo][Tt] return GOT;
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[Gg][Oo][Tt]"17"[Mm]"4" return GOT17M4;
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[Ff][Uu][Nn][Cc][Dd][Ee][Ss][Cc]"_"[Gg][Oo][Tt]"17"[Mm]"4" return FUNCDESC_GOT17M4;
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[Pp][Ll][Tt][Pp][Cc] return PLTPC;
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"~" return TILDA;
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"|=" return _BAR_ASSIGN;
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"|" return BAR;
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"^=" return _CARET_ASSIGN;
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"^" return CARET;
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"]" return RBRACK;
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"[" return LBRACK;
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">>>=" return _GREATER_GREATER_GREATER_THAN_ASSIGN;
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">>=" return _GREATER_GREATER_ASSIGN;
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">>>" return _GREATER_GREATER_GREATER;
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">>" return GREATER_GREATER;
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"==" return _ASSIGN_ASSIGN;
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"=" return ASSIGN;
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"<=" return _LESS_THAN_ASSIGN;
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"<<=" return _LESS_LESS_ASSIGN;
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"<<" return LESS_LESS;
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"<" return LESS_THAN;
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"(" BEGIN(FLAGS); return LPAREN;
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")" BEGIN(INITIAL); return RPAREN;
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":" return COLON;
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"/" return SLASH;
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"-=" return _MINUS_ASSIGN;
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"+|+" return _PLUS_BAR_PLUS;
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"-|+" return _MINUS_BAR_PLUS;
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"+|-" return _PLUS_BAR_MINUS;
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"-|-" return _MINUS_BAR_MINUS;
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"--" return _MINUS_MINUS;
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"-" return MINUS;
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"," return COMMA;
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"+=" return _PLUS_ASSIGN;
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"++" return _PLUS_PLUS;
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"+" return PLUS;
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"*=" return _STAR_ASSIGN;
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"*" return STAR;
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"&=" return _AMPERSAND_ASSIGN;
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"&" return AMPERSAND;
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"%" return PERCENT;
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"!" return BANG;
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";" return SEMICOLON;
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"=!" return _ASSIGN_BANG;
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"||" return DOUBLE_BAR;
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"@" return AT;
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<KEYWORD>[pP][rR][eE][fF][eE][tT][cC][hH] return PREFETCH;
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<KEYWORD>[uU][nN][lL][iI][nN][kK] return UNLINK;
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<KEYWORD>[lL][iI][nN][kK] return LINK;
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<KEYWORD>[iI][dD][lL][eE] return IDLE;
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<KEYWORD>[iI][fF][lL][uU][sS][hH] return IFLUSH;
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<KEYWORD>[fF][lL][uU][sS][hH][iI][nN][vV] return FLUSHINV;
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<KEYWORD>[fF][lL][uU][sS][hH] return FLUSH;
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([0-9]+)|(0[xX][0-9a-fA-F]+)|([bhfodBHOFD]#[0-9a-fA-F]+)|(0"."[0-9]+) {
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yylval.value = parse_int (&yytext);
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return NUMBER;
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}
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[[:alpha:]\x80-\xff_$.][[:alnum:]\x80-\xff_$.]* {
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yylval.symbol = symbol_find_or_make (yytext);
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symbol_mark_used (yylval.symbol);
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return SYMBOL;
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}
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[0-9][bfBF] {
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char *name;
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char *ref = strdup (yytext);
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if (ref[1] == 'b' || ref[1] == 'B')
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{
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name = fb_label_name ((int) (ref[0] - '0'), 0);
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yylval.symbol = symbol_find (name);
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if ((yylval.symbol != NULL)
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&& (S_IS_DEFINED (yylval.symbol)))
|
|
return SYMBOL;
|
|
as_bad ("backward reference to unknown label %d:",
|
|
(int) (ref[0] - '0'));
|
|
}
|
|
else if (ref[1] == 'f' || ref[1] == 'F')
|
|
{
|
|
/* Forward reference. Expect symbol to be undefined or
|
|
unknown. undefined: seen it before. unknown: never seen
|
|
it before.
|
|
|
|
Construct a local label name, then an undefined symbol.
|
|
Just return it as never seen before. */
|
|
|
|
name = fb_label_name ((int) (ref[0] - '0'), 1);
|
|
yylval.symbol = symbol_find_or_make (name);
|
|
/* We have no need to check symbol properties. */
|
|
return SYMBOL;
|
|
}
|
|
}
|
|
[ \t\n] ;
|
|
"/*".*"*/" ;
|
|
. return yytext[0];
|
|
%%
|
|
static long parse_int (char **end)
|
|
{
|
|
char fmt = '\0';
|
|
int not_done = 1;
|
|
int shiftvalue = 0;
|
|
char * char_bag;
|
|
long value = 0;
|
|
char *arg = *end;
|
|
|
|
while (*arg && *arg == ' ')
|
|
arg++;
|
|
|
|
switch (*arg)
|
|
{
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
fmt = 'd';
|
|
break;
|
|
|
|
case '0': /* Accept different formated integers hex octal and binary. */
|
|
{
|
|
char c = *++arg;
|
|
arg++;
|
|
if (c == 'x' || c == 'X') /* Hex input. */
|
|
fmt = 'h';
|
|
else if (c == 'b' || c == 'B')
|
|
fmt = 'b';
|
|
else if (c == '.')
|
|
fmt = 'f';
|
|
else
|
|
{ /* Octal. */
|
|
arg--;
|
|
fmt = 'o';
|
|
}
|
|
break;
|
|
}
|
|
|
|
case 'd':
|
|
case 'D':
|
|
case 'h':
|
|
case 'H':
|
|
case 'o':
|
|
case 'O':
|
|
case 'b':
|
|
case 'B':
|
|
case 'f':
|
|
case 'F':
|
|
{
|
|
fmt = *arg++;
|
|
if (*arg == '#')
|
|
arg++;
|
|
}
|
|
}
|
|
|
|
switch (fmt)
|
|
{
|
|
case 'h':
|
|
case 'H':
|
|
shiftvalue = 4;
|
|
char_bag = "0123456789ABCDEFabcdef";
|
|
break;
|
|
|
|
case 'o':
|
|
case 'O':
|
|
shiftvalue = 3;
|
|
char_bag = "01234567";
|
|
break;
|
|
|
|
case 'b':
|
|
case 'B':
|
|
shiftvalue = 1;
|
|
char_bag = "01";
|
|
break;
|
|
|
|
/* The assembler allows for fractional constants to be created
|
|
by either the 0.xxxx or the f#xxxx format
|
|
|
|
i.e. 0.5 would result in 0x4000
|
|
|
|
note .5 would result in the identifier .5.
|
|
|
|
The assembler converts to fractional format 1.15 by the simple rule:
|
|
|
|
value = (short) (finput * (1 << 15)). */
|
|
|
|
case 'f':
|
|
case 'F':
|
|
{
|
|
float fval = 0.0;
|
|
float pos = 10.0;
|
|
while (1)
|
|
{
|
|
int c;
|
|
c = *arg++;
|
|
|
|
if (c >= '0' && c <= '9')
|
|
{
|
|
float digit = (c - '0') / pos;
|
|
fval = fval + digit;
|
|
pos = pos * 10.0;
|
|
}
|
|
else
|
|
{
|
|
*--arg = c;
|
|
value = (short) (fval * (1 << 15));
|
|
break;
|
|
}
|
|
}
|
|
*end = arg+1;
|
|
return value;
|
|
}
|
|
|
|
case 'd':
|
|
case 'D':
|
|
default:
|
|
{
|
|
while (1)
|
|
{
|
|
char c;
|
|
c = *arg++;
|
|
if (c >= '0' && c <= '9')
|
|
value = (value * 10) + (c - '0');
|
|
else
|
|
{
|
|
/* Constants that are suffixed with k|K are multiplied by 1024
|
|
This suffix is only allowed on decimal constants. */
|
|
if (c == 'k' || c == 'K')
|
|
value *= 1024;
|
|
else
|
|
*--arg = c;
|
|
break;
|
|
}
|
|
}
|
|
*end = arg+1;
|
|
return value;
|
|
}
|
|
}
|
|
|
|
while (not_done)
|
|
{
|
|
char c;
|
|
c = *arg++;
|
|
if (c == 0 || !strchr (char_bag, c))
|
|
{
|
|
not_done = 0;
|
|
*--arg = c;
|
|
}
|
|
else
|
|
{
|
|
if (c >= 'a' && c <= 'z')
|
|
c = c - ('a' - '9') + 1;
|
|
else if (c >= 'A' && c <= 'Z')
|
|
c = c - ('A' - '9') + 1;
|
|
|
|
c -= '0';
|
|
value = (value << shiftvalue) + c;
|
|
}
|
|
}
|
|
*end = arg+1;
|
|
return value;
|
|
}
|
|
|
|
|
|
static int parse_reg (Register *r, int cl, char *rt)
|
|
{
|
|
r->regno = cl | (rt[1] - '0');
|
|
r->flags = F_REG_NONE;
|
|
return REG;
|
|
}
|
|
|
|
static int parse_halfreg (Register *r, int cl, char *rt)
|
|
{
|
|
r->regno = cl | (rt[1] - '0');
|
|
|
|
switch (rt[3])
|
|
{
|
|
case 'b':
|
|
case 'B':
|
|
return BYTE_DREG;
|
|
|
|
case 'l':
|
|
case 'L':
|
|
r->flags = F_REG_LOW;
|
|
break;
|
|
|
|
case 'h':
|
|
case 'H':
|
|
r->flags = F_REG_HIGH;
|
|
break;
|
|
}
|
|
|
|
return HALF_REG;
|
|
}
|
|
|
|
/* Our start state is KEYWORD as we have
|
|
command keywords such as PREFETCH. */
|
|
|
|
void
|
|
set_start_state (void)
|
|
{
|
|
BEGIN KEYWORD;
|
|
}
|
|
|
|
|
|
#ifndef yywrap
|
|
int
|
|
yywrap ()
|
|
{
|
|
return 1;
|
|
}
|
|
#endif
|