static GLboolean print_mov( struct tnl_clipspace_codegen *p, GLint dest, GLint src )
{
return
emit(p, " ") &&
emit_reg(p, dest) &&
emit(p, " = ") &&
emit_reg(p, src) &&
emit(p, ";\n");
}
static GLboolean print_float_to_chan( struct tnl_clipspace_codegen *p,
GLint dest, GLint src )
{
return
emit(p, " ") &&
emit(p, "UNCLAMPED_FLOAT_TO_CHAN(") &&
emit_reg(p, dest) &&
emit(p, ", ") &&
emit_reg(p, src) &&
emit(p, ");\n");
}
static GLboolean print_mad( struct tnl_clipspace_codegen *p,
GLint dest, GLint src0, GLint src1, GLint src2 )
{
return
emit(p, " ") &&
emit_reg(p, dest) &&
emit(p, " = ") &&
emit_reg(p, src0) &&
emit(p, " * ") &&
emit_reg(p, src1) &&
emit(p, " + ") &&
emit_reg(p, src2) &&
emit(p, ";\n");
}
static GLboolean print_const_ubyte( struct tnl_clipspace_codegen *p,
GLint dest, GLubyte c )
{
return
emit(p, " ") &&
emit_reg(p, dest) &&
emit(p, " = %x;\n", c);
}
static GLboolean print_const( struct tnl_clipspace_codegen *p,
GLint dest, GLfloat c )
{
return
emit(p, " ") &&
emit_reg(p, dest) &&
emit(p, " = %g;\n", c);
}
static GLboolean print_const_chan( struct tnl_clipspace_codegen *p,
GLint dest, GLchan c )
{
return
emit(p, " ") &&
emit_reg(p, dest) &&
emit(p, " = ") &&
#if CHAN_TYPE == GL_FLOAT
emit(p, "%f", c) &&
#else
emit(p, "%d", c) &&
#endif
emit(p, ";\n");
}
enum eval_result_type
compile_bytecodes (struct agent_expr *aexpr)
{
int pc = 0;
int done = 0;
unsigned char op, next_op;
int arg;
/* This is only used to build 64-bit value for constants. */
ULONGEST top;
struct bytecode_address *aentry, *aentry2;
#define UNHANDLED \
do \
{ \
ax_debug ("Cannot compile op 0x%x\n", op); \
return expr_eval_unhandled_opcode; \
} while (0)
if (aexpr->length == 0)
{
ax_debug ("empty agent expression\n");
return expr_eval_empty_expression;
}
bytecode_address_table = NULL;
while (!done)
{
op = aexpr->bytes[pc];
ax_debug ("About to compile op 0x%x, pc=%d\n", op, pc);
/* Record the compiled-code address of the bytecode, for use by
jump instructions. */
aentry = XNEW (struct bytecode_address);
aentry->pc = pc;
aentry->address = current_insn_ptr;
aentry->goto_pc = -1;
aentry->from_offset = aentry->from_size = 0;
aentry->next = bytecode_address_table;
bytecode_address_table = aentry;
++pc;
emit_error = 0;
switch (op)
{
case gdb_agent_op_add:
emit_add ();
break;
case gdb_agent_op_sub:
emit_sub ();
break;
case gdb_agent_op_mul:
emit_mul ();
break;
case gdb_agent_op_div_signed:
UNHANDLED;
break;
case gdb_agent_op_div_unsigned:
UNHANDLED;
break;
case gdb_agent_op_rem_signed:
UNHANDLED;
break;
case gdb_agent_op_rem_unsigned:
UNHANDLED;
break;
case gdb_agent_op_lsh:
emit_lsh ();
break;
case gdb_agent_op_rsh_signed:
emit_rsh_signed ();
break;
case gdb_agent_op_rsh_unsigned:
emit_rsh_unsigned ();
break;
case gdb_agent_op_trace:
UNHANDLED;
break;
case gdb_agent_op_trace_quick:
UNHANDLED;
break;
case gdb_agent_op_log_not:
emit_log_not ();
break;
case gdb_agent_op_bit_and:
emit_bit_and ();
break;
case gdb_agent_op_bit_or:
emit_bit_or ();
break;
case gdb_agent_op_bit_xor:
emit_bit_xor ();
break;
case gdb_agent_op_bit_not:
emit_bit_not ();
break;
case gdb_agent_op_equal:
next_op = aexpr->bytes[pc];
if (next_op == gdb_agent_op_if_goto
&& !is_goto_target (aexpr, pc)
&& target_emit_ops ()->emit_eq_goto)
{
ax_debug ("Combining equal & if_goto");
pc += 1;
aentry->pc = pc;
arg = aexpr->bytes[pc++];
arg = (arg << 8) + aexpr->bytes[pc++];
aentry->goto_pc = arg;
emit_eq_goto (&(aentry->from_offset), &(aentry->from_size));
}
else if (next_op == gdb_agent_op_log_not
&& (aexpr->bytes[pc + 1] == gdb_agent_op_if_goto)
&& !is_goto_target (aexpr, pc + 1)
&& target_emit_ops ()->emit_ne_goto)
{
ax_debug ("Combining equal & log_not & if_goto");
pc += 2;
aentry->pc = pc;
arg = aexpr->bytes[pc++];
arg = (arg << 8) + aexpr->bytes[pc++];
aentry->goto_pc = arg;
emit_ne_goto (&(aentry->from_offset), &(aentry->from_size));
}
else
emit_equal ();
break;
case gdb_agent_op_less_signed:
next_op = aexpr->bytes[pc];
if (next_op == gdb_agent_op_if_goto
&& !is_goto_target (aexpr, pc))
{
ax_debug ("Combining less_signed & if_goto");
pc += 1;
aentry->pc = pc;
arg = aexpr->bytes[pc++];
arg = (arg << 8) + aexpr->bytes[pc++];
aentry->goto_pc = arg;
emit_lt_goto (&(aentry->from_offset), &(aentry->from_size));
}
else if (next_op == gdb_agent_op_log_not
&& !is_goto_target (aexpr, pc)
&& (aexpr->bytes[pc + 1] == gdb_agent_op_if_goto)
&& !is_goto_target (aexpr, pc + 1))
{
ax_debug ("Combining less_signed & log_not & if_goto");
pc += 2;
aentry->pc = pc;
arg = aexpr->bytes[pc++];
arg = (arg << 8) + aexpr->bytes[pc++];
aentry->goto_pc = arg;
emit_ge_goto (&(aentry->from_offset), &(aentry->from_size));
}
else
emit_less_signed ();
break;
case gdb_agent_op_less_unsigned:
emit_less_unsigned ();
break;
case gdb_agent_op_ext:
arg = aexpr->bytes[pc++];
if (arg < (sizeof (LONGEST) * 8))
emit_ext (arg);
break;
case gdb_agent_op_ref8:
emit_ref (1);
break;
case gdb_agent_op_ref16:
emit_ref (2);
break;
case gdb_agent_op_ref32:
emit_ref (4);
break;
case gdb_agent_op_ref64:
emit_ref (8);
break;
case gdb_agent_op_if_goto:
arg = aexpr->bytes[pc++];
arg = (arg << 8) + aexpr->bytes[pc++];
aentry->goto_pc = arg;
emit_if_goto (&(aentry->from_offset), &(aentry->from_size));
break;
case gdb_agent_op_goto:
arg = aexpr->bytes[pc++];
arg = (arg << 8) + aexpr->bytes[pc++];
aentry->goto_pc = arg;
emit_goto (&(aentry->from_offset), &(aentry->from_size));
break;
case gdb_agent_op_const8:
emit_stack_flush ();
top = aexpr->bytes[pc++];
emit_const (top);
break;
case gdb_agent_op_const16:
emit_stack_flush ();
top = aexpr->bytes[pc++];
top = (top << 8) + aexpr->bytes[pc++];
emit_const (top);
break;
case gdb_agent_op_const32:
emit_stack_flush ();
top = aexpr->bytes[pc++];
top = (top << 8) + aexpr->bytes[pc++];
top = (top << 8) + aexpr->bytes[pc++];
top = (top << 8) + aexpr->bytes[pc++];
emit_const (top);
break;
case gdb_agent_op_const64:
emit_stack_flush ();
top = aexpr->bytes[pc++];
top = (top << 8) + aexpr->bytes[pc++];
top = (top << 8) + aexpr->bytes[pc++];
top = (top << 8) + aexpr->bytes[pc++];
top = (top << 8) + aexpr->bytes[pc++];
top = (top << 8) + aexpr->bytes[pc++];
top = (top << 8) + aexpr->bytes[pc++];
top = (top << 8) + aexpr->bytes[pc++];
emit_const (top);
break;
case gdb_agent_op_reg:
emit_stack_flush ();
arg = aexpr->bytes[pc++];
arg = (arg << 8) + aexpr->bytes[pc++];
emit_reg (arg);
break;
case gdb_agent_op_end:
ax_debug ("At end of expression\n");
/* Assume there is one stack element left, and that it is
cached in "top" where emit_epilogue can get to it. */
emit_stack_adjust (1);
done = 1;
break;
case gdb_agent_op_dup:
/* In our design, dup is equivalent to stack flushing. */
emit_stack_flush ();
break;
case gdb_agent_op_pop:
emit_pop ();
break;
case gdb_agent_op_zero_ext:
arg = aexpr->bytes[pc++];
if (arg < (sizeof (LONGEST) * 8))
emit_zero_ext (arg);
break;
case gdb_agent_op_swap:
next_op = aexpr->bytes[pc];
/* Detect greater-than comparison sequences. */
if (next_op == gdb_agent_op_less_signed
&& !is_goto_target (aexpr, pc)
&& (aexpr->bytes[pc + 1] == gdb_agent_op_if_goto)
&& !is_goto_target (aexpr, pc + 1))
{
ax_debug ("Combining swap & less_signed & if_goto");
pc += 2;
aentry->pc = pc;
arg = aexpr->bytes[pc++];
arg = (arg << 8) + aexpr->bytes[pc++];
aentry->goto_pc = arg;
emit_gt_goto (&(aentry->from_offset), &(aentry->from_size));
}
else if (next_op == gdb_agent_op_less_signed
&& !is_goto_target (aexpr, pc)
&& (aexpr->bytes[pc + 1] == gdb_agent_op_log_not)
&& !is_goto_target (aexpr, pc + 1)
&& (aexpr->bytes[pc + 2] == gdb_agent_op_if_goto)
&& !is_goto_target (aexpr, pc + 2))
{
ax_debug ("Combining swap & less_signed & log_not & if_goto");
pc += 3;
aentry->pc = pc;
arg = aexpr->bytes[pc++];
arg = (arg << 8) + aexpr->bytes[pc++];
aentry->goto_pc = arg;
emit_le_goto (&(aentry->from_offset), &(aentry->from_size));
}
else
emit_swap ();
break;
case gdb_agent_op_getv:
emit_stack_flush ();
arg = aexpr->bytes[pc++];
arg = (arg << 8) + aexpr->bytes[pc++];
emit_int_call_1 (get_get_tsv_func_addr (),
arg);
break;
case gdb_agent_op_setv:
arg = aexpr->bytes[pc++];
arg = (arg << 8) + aexpr->bytes[pc++];
emit_void_call_2 (get_set_tsv_func_addr (),
arg);
break;
case gdb_agent_op_tracev:
UNHANDLED;
break;
/* GDB never (currently) generates any of these ops. */
case gdb_agent_op_float:
case gdb_agent_op_ref_float:
case gdb_agent_op_ref_double:
case gdb_agent_op_ref_long_double:
case gdb_agent_op_l_to_d:
case gdb_agent_op_d_to_l:
case gdb_agent_op_trace16:
UNHANDLED;
break;
default:
ax_debug ("Agent expression op 0x%x not recognized\n", op);
/* Don't struggle on, things will just get worse. */
return expr_eval_unrecognized_opcode;
}
/* This catches errors that occur in target-specific code
emission. */
if (emit_error)
{
ax_debug ("Error %d while emitting code for %s\n",
emit_error, gdb_agent_op_name (op));
return expr_eval_unhandled_opcode;
}
ax_debug ("Op %s compiled\n", gdb_agent_op_name (op));
}
/* Now fill in real addresses as goto destinations. */
for (aentry = bytecode_address_table; aentry; aentry = aentry->next)
{
int written = 0;
if (aentry->goto_pc < 0)
continue;
/* Find the location that we are going to, and call back into
target-specific code to write the actual address or
displacement. */
for (aentry2 = bytecode_address_table; aentry2; aentry2 = aentry2->next)
{
if (aentry2->pc == aentry->goto_pc)
{
ax_debug ("Want to jump from %s to %s\n",
paddress (aentry->address),
paddress (aentry2->address));
write_goto_address (aentry->address + aentry->from_offset,
aentry2->address, aentry->from_size);
written = 1;
break;
}
}
/* Error out if we didn't find a destination. */
if (!written)
{
ax_debug ("Destination of goto %d not found\n",
aentry->goto_pc);
return expr_eval_invalid_goto;
}
}
return expr_eval_no_error;
}
