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2008-11-04 Sterling Augustine <sterling@tensilica.com>

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* config/tc-xtensa.c (tinsn_check_arguments): Check for multiple
	writes to the same register.
This commit is contained in:
Bob Wilson 2008-11-05 00:45:04 +00:00
parent 4e2a3fbadf
commit 6dc6b6558b
2 changed files with 59 additions and 0 deletions
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5
gas/ChangeLog
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@ -1,3 +1,8 @@
2008-11-04 Sterling Augustine <sterling@tensilica.com>
* config/tc-xtensa.c (tinsn_check_arguments): Check for multiple
writes to the same register.
2008-11-04 Sterling Augustine <sterling@tensilica.com>
* config/tc-xtensa.c (xtensa_j_opcode): New.

54
gas/config/tc-xtensa.c
View File

@ -11457,6 +11457,12 @@ tinsn_check_arguments (const TInsn *insn)
{
xtensa_isa isa = xtensa_default_isa;
xtensa_opcode opcode = insn->opcode;
xtensa_regfile t1_regfile, t2_regfile;
int t1_reg, t2_reg;
int t1_base_reg, t1_last_reg;
int t2_base_reg, t2_last_reg;
char t1_inout, t2_inout;
int i, j;
if (opcode == XTENSA_UNDEFINED)
{
@ -11475,6 +11481,54 @@ tinsn_check_arguments (const TInsn *insn)
as_bad (_("too many operands"));
return TRUE;
}
/* Check registers. */
for (j = 0; j < insn->ntok; j++)
{
if (xtensa_operand_is_register (isa, insn->opcode, j) != 1)
continue;
t2_regfile = xtensa_operand_regfile (isa, insn->opcode, j);
t2_base_reg = insn->tok[j].X_add_number;
t2_last_reg
= t2_base_reg + xtensa_operand_num_regs (isa, insn->opcode, j);
for (i = 0; i < insn->ntok; i++)
{
if (i == j)
continue;
if (xtensa_operand_is_register (isa, insn->opcode, i) != 1)
continue;
t1_regfile = xtensa_operand_regfile (isa, insn->opcode, i);
if (t1_regfile != t2_regfile)
continue;
t1_inout = xtensa_operand_inout (isa, insn->opcode, i);
t2_inout = xtensa_operand_inout (isa, insn->opcode, j);
t1_base_reg = insn->tok[i].X_add_number;
t1_last_reg = (t1_base_reg
+ xtensa_operand_num_regs (isa, insn->opcode, i));
for (t1_reg = t1_base_reg; t1_reg < t1_last_reg; t1_reg++)
{
for (t2_reg = t2_base_reg; t2_reg < t2_last_reg; t2_reg++)
{
if (t1_reg != t2_reg)
continue;
if (t1_inout != 'i' && t2_inout != 'i')
{
as_bad (_("multiple writes to the same register"));
return TRUE;
}
}
}
}
}
return FALSE;
}