dist/gcc/expr.c

218   machine_mode from_mode = GET_MODE (from);
221   gcc_assert (from_mode != BLKmode);
241       from_mode = to_int_mode;
246   if (to_mode == from_mode
247       || (from_mode == VOIDmode && CONSTANT_P (from)))
253   if (VECTOR_MODE_P (to_mode) || VECTOR_MODE_P (from_mode))
256 	  > GET_MODE_UNIT_PRECISION (from_mode))
259 	  insn_code icode = convert_optab_handler (op, to_mode, from_mode);
269 	  < GET_MODE_UNIT_PRECISION (from_mode))
272 						   to_mode, from_mode);
280       gcc_assert (known_eq (GET_MODE_BITSIZE (from_mode),
286 	to = simplify_gen_subreg (from_mode, to, GET_MODE (to), 0);
308   scalar_mode from_mode = as_a <scalar_mode> (GET_MODE (from));
311   bool from_real = SCALAR_FLOAT_MODE_P (from_mode);
327       gcc_assert ((GET_MODE_PRECISION (from_mode)
329 		  || (DECIMAL_FLOAT_MODE_P (from_mode)
332       if (GET_MODE_PRECISION (from_mode) == GET_MODE_PRECISION (to_mode))
334 	tab = DECIMAL_FLOAT_MODE_P (from_mode) ? trunc_optab : sext_optab;
335       else if (GET_MODE_PRECISION (from_mode) < GET_MODE_PRECISION (to_mode))
342       code = convert_optab_handler (tab, to_mode, from_mode);
351       libcall = convert_optab_libfunc (tab, to_mode, from_mode);
358 				       from, from_mode);
373     if (GET_MODE_PRECISION (from_mode) > GET_MODE_PRECISION (to_mode))
380     if (convert_optab_handler (ctab, to_mode, from_mode)
383 	emit_unop_insn (convert_optab_handler (ctab, to_mode, from_mode),
399       if (full_mode != from_mode)
405   if (GET_MODE_CLASS (from_mode) == MODE_PARTIAL_INT)
409 	= smallest_int_mode_for_size (GET_MODE_BITSIZE (from_mode));
413       icode = convert_optab_handler (ctab, full_mode, from_mode);
426       from_mode = full_mode;
431    gcc_assert (ALL_SCALAR_FIXED_POINT_MODE_P (from_mode) ==
433    if (ALL_SCALAR_FIXED_POINT_MODE_P (from_mode))
435       /* If we widen from_mode to to_mode and they are in the same class,
438       if (GET_MODE_CLASS (from_mode) == GET_MODE_CLASS (to_mode)
439 	  && GET_MODE_SIZE (from_mode) < GET_MODE_SIZE (to_mode))
449   if (GET_MODE_PRECISION (from_mode) < GET_MODE_PRECISION (to_mode)
461       if ((code = can_extend_p (to_mode, from_mode, unsignedp))
469 	    from = force_reg (from_mode, from);
474       else if (GET_MODE_PRECISION (from_mode) < BITS_PER_WORD
482 		from = force_reg (from_mode, from);
500 	from = force_reg (from_mode, from);
503       if (GET_MODE_PRECISION (from_mode) < BITS_PER_WORD)
506 	lowpart_mode = from_mode;
541   if (GET_MODE_PRECISION (from_mode) > BITS_PER_WORD
551 	from = force_reg (from_mode, from);
560   if (GET_MODE_BITSIZE (to_mode) < GET_MODE_BITSIZE (from_mode)
561       && TRULY_NOOP_TRUNCATION_MODES_P (to_mode, from_mode))
570 	from = force_reg (from_mode, from);
579   if (GET_MODE_PRECISION (to_mode) > GET_MODE_PRECISION (from_mode))
582       if ((code = can_extend_p (to_mode, from_mode, unsignedp))
595 	  FOR_EACH_MODE_FROM (intermediate_iter, from_mode)
603 		  && (can_extend_p (intermediate, from_mode, unsignedp)
615 			  - GET_MODE_PRECISION (from_mode));
616 	  from = gen_lowpart (to_mode, force_reg (from_mode, from));
629 			     from_mode) != CODE_FOR_nothing)
631       emit_unop_insn (convert_optab_handler (trunc_optab, to_mode, from_mode),
641      mode pairs, with a force_reg in from_mode followed by a recursive
643   if (GET_MODE_PRECISION (to_mode) < GET_MODE_PRECISION (from_mode))
5294 		  machine_mode from_mode = GET_MODE_INNER (GET_MODE (result));
5297 					   from_mode, 0);
5300 					   from_mode, 0);
5308 		  machine_mode from_mode
5317 		      = simplify_gen_subreg (to_mode, result, from_mode, 0);
5329 			= simplify_gen_subreg (to_mode, result, from_mode, 0);
5331 			= simplify_gen_subreg (to_mode, result, from_mode,