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* config/tc-tic80.c (find_opcode, build_insn): Changes to match

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operands with :m or :s modifiers and generate the right opcodes
	for them.
This commit is contained in:
Fred Fish
1997-02-26 22:42:51 +00:00
parent 1cc86f47fa
commit f92f247b2d
2 changed files with 58 additions and 30 deletions
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8
gas/ChangeLog
View File

@ -1,3 +1,11 @@
start-sanitize-tic80
Wed Feb 26 15:33:46 1997 Fred Fish <fnf@cygnus.com>
* config/tc-tic80.c (find_opcode, build_insn): Changes to match
operands with :m or :s modifiers and generate the right opcodes
for them.
end-sanitize-tic80
Wed Feb 26 11:56:11 1997 Ian Lance Taylor <ian@cygnus.com> Wed Feb 26 11:56:11 1997 Ian Lance Taylor <ian@cygnus.com>
* Makefile.in (itbl-parse.c itbl-parse.h): Use $(BISON) and * Makefile.in (itbl-parse.c itbl-parse.h): Use $(BISON) and

80
gas/config/tc-tic80.c
View File

@ -220,11 +220,13 @@ get_operands (exp)
if (*p == 'm') if (*p == 'm')
{ {
p++; p++;
/* This is a ":m" modifier */
exp[numexp].X_add_number = TIC80_OPERAND_M_SI | TIC80_OPERAND_M_LI; exp[numexp].X_add_number = TIC80_OPERAND_M_SI | TIC80_OPERAND_M_LI;
} }
else if (*p == 's') else if (*p == 's')
{ {
p++; p++;
/* This is a ":s" modifier */
exp[numexp].X_add_number = TIC80_OPERAND_SCALED; exp[numexp].X_add_number = TIC80_OPERAND_SCALED;
} }
else else
@ -345,14 +347,17 @@ find_opcode (opcode, myops)
X_op = myops[expi].X_op; X_op = myops[expi].X_op;
num = myops[expi].X_add_number; num = myops[expi].X_add_number;
/* The O_absent expressions apply to the same operand as the most
recent non O_absent expression. So only increment the operand
index when the current expression is not one of these special
expressions. */
if (X_op != O_absent) if (X_op != O_absent)
{ {
/* The O_absent expressions apply to the previously seen
operand, so only increment the operand index when the
current expression needs to be matched against the next
operand. */
opi++; opi++;
} }
flags = tic80_operands[opc -> operands[opi]].flags; flags = tic80_operands[opc -> operands[opi]].flags;
bits = tic80_operands[opc -> operands[opi]].bits; bits = tic80_operands[opc -> operands[opi]].bits;
@ -402,8 +407,18 @@ find_opcode (opcode, myops)
match = 0; match = 0;
} }
break; break;
case O_illegal:
case O_absent: case O_absent:
/* If this is an O_absent expression, then it may be an expression that
supplies additional information about the operand, such as ":m" or
":s" modifiers. Check to see that the operand matches this requirement. */
if (!((num & TIC80_OPERAND_M_SI) && (flags & TIC80_OPERAND_M_SI) ||
(num & TIC80_OPERAND_M_LI) && (flags & TIC80_OPERAND_M_LI) ||
(num & TIC80_OPERAND_SCALED) && (flags & TIC80_OPERAND_SCALED)))
{
match = 0;
}
break;
case O_illegal:
case O_symbol_rva: case O_symbol_rva:
case O_big: case O_big:
case O_uminus: case O_uminus:
@ -557,34 +572,17 @@ build_insn (opcode, opers)
X_op = opers[expi].X_op; X_op = opers[expi].X_op;
num = opers[expi].X_add_number; num = opers[expi].X_add_number;
/* The O_absent expressions apply to the same operand as the most
recent non O_absent expression. So only increment the operand
index when the current expression is not one of these special
expressions. */
if (X_op != O_absent) if (X_op != O_absent)
{ {
/* The O_absent expressions apply to the previously seen
operand, so only increment the operand index when the
current expression needs to be matched against the next
operand. */
opi++; opi++;
} }
else
{
/* Found a modifier that applies to the previously
seen operand, so handle it. */
switch (opers[expi].X_add_number)
{
case TIC80_OPERAND_M_SI | TIC80_OPERAND_M_LI:
internal_error_a ("unhandled operand modifier", opers[expi].X_add_number);
break;
case TIC80_OPERAND_SCALED:
internal_error_a ("unhandled operand modifier", opers[expi].X_add_number);
break;
case TIC80_OPERAND_PARENS:
internal_error_a ("unhandled operand modifier", opers[expi].X_add_number);
break;
default:
internal_error_a ("unhandled operand modifier", opers[expi].X_add_number);
break;
}
}
flags = tic80_operands[opcode -> operands[opi]].flags; flags = tic80_operands[opcode -> operands[opi]].flags;
bits = tic80_operands[opcode -> operands[opi]].bits; bits = tic80_operands[opcode -> operands[opi]].bits;
shift = tic80_operands[opcode -> operands[opi]].shift; shift = tic80_operands[opcode -> operands[opi]].shift;
@ -643,8 +641,30 @@ build_insn (opcode, opers)
internal_error ("symbol reloc that is not PC relative or 32 bits"); internal_error ("symbol reloc that is not PC relative or 32 bits");
} }
break; break;
case O_illegal:
case O_absent: case O_absent:
/* Each O_absent expression can indicate exactly one possible modifier. */
if ((num & TIC80_OPERAND_M_SI) && (flags & TIC80_OPERAND_M_SI))
{
insn[0] = insn[0] | (1 << 17);
}
else if ((num & TIC80_OPERAND_M_LI) && (flags & TIC80_OPERAND_M_LI))
{
insn[0] = insn[0] | (1 << 15);
}
else if ((num & TIC80_OPERAND_SCALED) && (flags & TIC80_OPERAND_SCALED))
{
insn[0] = insn[0] | (1 << 11);
}
else if ((num & TIC80_OPERAND_PARENS) && (flags & TIC80_OPERAND_PARENS))
{
/* No code to generate, just accept and discard this expression */
}
else
{
internal_error_a ("unhandled operand modifier", opers[expi].X_add_number);
}
break;
case O_illegal:
case O_symbol_rva: case O_symbol_rva:
case O_big: case O_big:
case O_uminus: case O_uminus: