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Lex the register number with the register name.

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This avoids the need for a start condition to prevent for example g1.8<0,1,0>UW
being lexed as GENREG NUMBER LANGLE etc. rather than
GENREG INTEGER DOT INTEGER LANGLE etc.
This commit is contained in:
Eric Anholt
2006-08-25 09:46:18 -07:00
committed by Damien Lespiau
parent 3d36079ae3
commit 569990bf6b
2 changed files with 46 additions and 43 deletions
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assembler/lex.l
+19 -22
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@@ -7,7 +7,6 @@
int saved_state = INITIAL;
%}
%s IN_REG
%x BLOCK_COMMENT
%%
@@ -74,33 +73,31 @@ int saved_state = INITIAL;
"-" { return MINUS; }
"(abs)" { return ABS; }
/* XXX: this lexing of register files is shady */
"acc" {
BEGIN(IN_REG);
"acc"[0-9]+ {
yylval.integer = atoi(yytext + 1);
return ACCREG;
}
"a" {
BEGIN(IN_REG);
"a"[0-9]+ {
yylval.integer = atoi(yytext + 1);
return ADDRESSREG;
}
"m" {
BEGIN(IN_REG);
"m"[0-9]+ {
yylval.integer = atoi(yytext + 1);
return MSGREG;
}
"f" {
BEGIN(IN_REG);
"f"[0-9]+ {
yylval.integer = atoi(yytext + 1);
return FLAGREG;
}
[gr] {
BEGIN(IN_REG);
[gr][0-9]+ {
yylval.integer = atoi(yytext + 1);
return GENREG;
}
"cr" {
BEGIN(IN_REG);
"cr"[0-9]+ {
yylval.integer = atoi(yytext + 1);
return CONTROLREG;
}
"ip" {
BEGIN(IN_REG);
return IPREG;
}
@@ -108,13 +105,13 @@ int saved_state = INITIAL;
* Lexing of register types should probably require the ":" symbol specified
* in the BNF of the assembly, but our existing source didn't use that syntax.
*/
"UD" { BEGIN(INITIAL); return TYPE_UD; }
"D" { BEGIN(INITIAL); return TYPE_D; }
"UW" { BEGIN(INITIAL); return TYPE_UW; }
"W" { BEGIN(INITIAL); return TYPE_W; }
"UB" { BEGIN(INITIAL); return TYPE_UB; }
"B" { BEGIN(INITIAL); return TYPE_B; }
"F" { BEGIN(INITIAL); return TYPE_F; }
"UD" { return TYPE_UD; }
"D" { return TYPE_D; }
"UW" { return TYPE_UW; }
"W" { return TYPE_W; }
"UB" { return TYPE_UB; }
"B" { return TYPE_B; }
"F" { return TYPE_F; }
"sat" { return SATURATE; }
"align1" { return ALIGN1; }