alpha.md

linux下的gcc编译器

	(zero_extend:DI (match_operand:SI 1 "register_operand" "r")))]
  ""
  "zapnot %1,15,%0"
  [(set_attr "type" "shift")])

(define_insn "andnotdi3"
  [(set (match_operand:DI 0 "register_operand" "=r")
	(and:DI (not:DI (match_operand:DI 1 "reg_or_8bit_operand" "rI"))
		(match_operand:DI 2 "reg_or_0_operand" "rJ")))]
  ""
  "bic %r2,%1,%0"
  [(set_attr "type" "ilog")])

(define_insn "iordi3"
  [(set (match_operand:DI 0 "register_operand" "=r,r")
	(ior:DI (match_operand:DI 1 "reg_or_0_operand" "%rJ,rJ")
		(match_operand:DI 2 "or_operand" "rI,N")))]
  ""
  "@
   bis %r1,%2,%0
   ornot %r1,%N2,%0"
  [(set_attr "type" "ilog")])

(define_insn "one_cmpldi2"
  [(set (match_operand:DI 0 "register_operand" "=r")
	(not:DI (match_operand:DI 1 "reg_or_8bit_operand" "rI")))]
  ""
  "ornot $31,%1,%0"
  [(set_attr "type" "ilog")])

(define_insn "*iornot"
  [(set (match_operand:DI 0 "register_operand" "=r")
	(ior:DI (not:DI (match_operand:DI 1 "reg_or_8bit_operand" "rI"))
		(match_operand:DI 2 "reg_or_0_operand" "rJ")))]
  ""
  "ornot %r2,%1,%0"
  [(set_attr "type" "ilog")])

(define_insn "xordi3"
  [(set (match_operand:DI 0 "register_operand" "=r,r")
	(xor:DI (match_operand:DI 1 "reg_or_0_operand" "%rJ,rJ")
		(match_operand:DI 2 "or_operand" "rI,N")))]
  ""
  "@
   xor %r1,%2,%0
   eqv %r1,%N2,%0"
  [(set_attr "type" "ilog")])

(define_insn "*xornot"
  [(set (match_operand:DI 0 "register_operand" "=r")
	(not:DI (xor:DI (match_operand:DI 1 "register_operand" "%rJ")
			(match_operand:DI 2 "register_operand" "rI"))))]
  ""
  "eqv %r1,%2,%0"
  [(set_attr "type" "ilog")])

;; Handle the FFS insn iff we support CIX.

(define_expand "ffsdi2"
  [(set (match_dup 2)
	(unspec:DI [(match_operand:DI 1 "register_operand" "")] UNSPEC_CTTZ))
   (set (match_dup 3)
	(plus:DI (match_dup 2) (const_int 1)))
   (set (match_operand:DI 0 "register_operand" "")
	(if_then_else:DI (eq (match_dup 1) (const_int 0))
			 (const_int 0) (match_dup 3)))]
  "TARGET_CIX"
{
  operands[2] = gen_reg_rtx (DImode);
  operands[3] = gen_reg_rtx (DImode);
})

(define_insn "*cttz"
  [(set (match_operand:DI 0 "register_operand" "=r")
	(unspec:DI [(match_operand:DI 1 "register_operand" "r")] UNSPEC_CTTZ))]
  "TARGET_CIX"
  "cttz %1,%0"
  ; EV6 calls all mvi and cttz/ctlz/popc class imisc, so just
  ; reuse the existing type name.
  [(set_attr "type" "mvi")])

;; Next come the shifts and the various extract and insert operations.

(define_insn "ashldi3"
  [(set (match_operand:DI 0 "register_operand" "=r,r")
	(ashift:DI (match_operand:DI 1 "reg_or_0_operand" "rJ,rJ")
		   (match_operand:DI 2 "reg_or_6bit_operand" "P,rS")))]
  ""
{
  switch (which_alternative)
    {
    case 0:
      if (operands[2] == const1_rtx)
	return "addq %r1,%r1,%0";
      else
	return "s%P2addq %r1,0,%0";
    case 1:
      return "sll %r1,%2,%0";
    default:
      abort();
    }
}
  [(set_attr "type" "iadd,shift")])

(define_insn "*ashldi_se"
  [(set (match_operand:DI 0 "register_operand" "=r")
	(sign_extend:DI
	 (subreg:SI (ashift:DI (match_operand:DI 1 "reg_or_0_operand" "rJ")
			       (match_operand:DI 2 "const_int_operand" "P"))
		    0)))]
  "INTVAL (operands[2]) >= 1 && INTVAL (operands[2]) <= 3"
{
  if (operands[2] == const1_rtx)
    return "addl %r1,%r1,%0";
  else
    return "s%P2addl %r1,0,%0";
}
  [(set_attr "type" "iadd")])

(define_insn "lshrdi3"
  [(set (match_operand:DI 0 "register_operand" "=r")
	(lshiftrt:DI (match_operand:DI 1 "reg_or_0_operand" "rJ")
		     (match_operand:DI 2 "reg_or_6bit_operand" "rS")))]
  ""
  "srl %r1,%2,%0"
  [(set_attr "type" "shift")])

(define_insn "ashrdi3"
  [(set (match_operand:DI 0 "register_operand" "=r")
	(ashiftrt:DI (match_operand:DI 1 "reg_or_0_operand" "rJ")
		     (match_operand:DI 2 "reg_or_6bit_operand" "rS")))]
  ""
  "sra %r1,%2,%0"
  [(set_attr "type" "shift")])

(define_expand "extendqihi2"
  [(set (match_dup 2)
	(ashift:DI (match_operand:QI 1 "some_operand" "")
		   (const_int 56)))
   (set (match_operand:HI 0 "register_operand" "")
	(ashiftrt:DI (match_dup 2)
		     (const_int 56)))]
  ""
{
  if (TARGET_BWX)
    {
      emit_insn (gen_extendqihi2x (operands[0],
				   force_reg (QImode, operands[1])));
      DONE;
    }

 /* If we have an unaligned MEM, extend to DImode (which we do
     specially) and then copy to the result.  */
  if (unaligned_memory_operand (operands[1], HImode))
    {
      rtx temp = gen_reg_rtx (DImode);

      emit_insn (gen_extendqidi2 (temp, operands[1]));
      emit_move_insn (operands[0], gen_lowpart (HImode, temp));
      DONE;
    }

  operands[0] = gen_lowpart (DImode, operands[0]);
  operands[1] = gen_lowpart (DImode, force_reg (QImode, operands[1]));
  operands[2] = gen_reg_rtx (DImode);
})

(define_insn "extendqidi2x"
  [(set (match_operand:DI 0 "register_operand" "=r")
	(sign_extend:DI (match_operand:QI 1 "register_operand" "r")))]
  "TARGET_BWX"
  "sextb %1,%0"
  [(set_attr "type" "shift")])

(define_insn "extendhidi2x"
  [(set (match_operand:DI 0 "register_operand" "=r")
	(sign_extend:DI (match_operand:HI 1 "register_operand" "r")))]
  "TARGET_BWX"
  "sextw %1,%0"
  [(set_attr "type" "shift")])

(define_insn "extendqisi2x"
  [(set (match_operand:SI 0 "register_operand" "=r")
	(sign_extend:SI (match_operand:QI 1 "register_operand" "r")))]
  "TARGET_BWX"
  "sextb %1,%0"
  [(set_attr "type" "shift")])

(define_insn "extendhisi2x"
  [(set (match_operand:SI 0 "register_operand" "=r")
	(sign_extend:SI (match_operand:HI 1 "register_operand" "r")))]
  "TARGET_BWX"
  "sextw %1,%0"
  [(set_attr "type" "shift")])

(define_insn "extendqihi2x"
  [(set (match_operand:HI 0 "register_operand" "=r")
	(sign_extend:HI (match_operand:QI 1 "register_operand" "r")))]
  "TARGET_BWX"
  "sextb %1,%0"
  [(set_attr "type" "shift")])

(define_expand "extendqisi2"
  [(set (match_dup 2)
	(ashift:DI (match_operand:QI 1 "some_operand" "")
		   (const_int 56)))
   (set (match_operand:SI 0 "register_operand" "")
	(ashiftrt:DI (match_dup 2)
		     (const_int 56)))]
  ""
{
  if (TARGET_BWX)
    {
      emit_insn (gen_extendqisi2x (operands[0],
				   force_reg (QImode, operands[1])));
      DONE;
    }

  /* If we have an unaligned MEM, extend to a DImode form of
     the result (which we do specially).  */
  if (unaligned_memory_operand (operands[1], QImode))
    {
      rtx temp = gen_reg_rtx (DImode);

      emit_insn (gen_extendqidi2 (temp, operands[1]));
      emit_move_insn (operands[0], gen_lowpart (SImode, temp));
      DONE;
    }

  operands[0] = gen_lowpart (DImode, operands[0]);
  operands[1] = gen_lowpart (DImode, force_reg (QImode, operands[1]));
  operands[2] = gen_reg_rtx (DImode);
})

(define_expand "extendqidi2"
  [(set (match_dup 2)
	(ashift:DI (match_operand:QI 1 "some_operand" "")
		   (const_int 56)))
   (set (match_operand:DI 0 "register_operand" "")
	(ashiftrt:DI (match_dup 2)
		     (const_int 56)))]
  ""
{
  if (TARGET_BWX)
    {
      emit_insn (gen_extendqidi2x (operands[0],
				   force_reg (QImode, operands[1])));
      DONE;
    }

  if (unaligned_memory_operand (operands[1], QImode))
    {
      rtx seq
	= gen_unaligned_extendqidi (operands[0],
				    get_unaligned_address (operands[1], 1));

      alpha_set_memflags (seq, operands[1]);
      emit_insn (seq);
      DONE;
    }

  operands[1] = gen_lowpart (DImode, force_reg (QImode, operands[1]));
  operands[2] = gen_reg_rtx (DImode);
})

(define_expand "extendhisi2"
  [(set (match_dup 2)
	(ashift:DI (match_operand:HI 1 "some_operand" "")
		   (const_int 48)))
   (set (match_operand:SI 0 "register_operand" "")
	(ashiftrt:DI (match_dup 2)
		     (const_int 48)))]
  ""
{
  if (TARGET_BWX)
    {
      emit_insn (gen_extendhisi2x (operands[0],
				   force_reg (HImode, operands[1])));
      DONE;
    }

  /* If we have an unaligned MEM, extend to a DImode form of
     the result (which we do specially).  */
  if (unaligned_memory_operand (operands[1], HImode))
    {
      rtx temp = gen_reg_rtx (DImode);

      emit_insn (gen_extendhidi2 (temp, operands[1]));
      emit_move_insn (operands[0], gen_lowpart (SImode, temp));
      DONE;
    }

  operands[0] = gen_lowpart (DImode, operands[0]);
  operands[1] = gen_lowpart (DImode, force_reg (HImode, operands[1]));
  operands[2] = gen_reg_rtx (DImode);
})

(define_expand "extendhidi2"
  [(set (match_dup 2)
	(ashift:DI (match_operand:HI 1 "some_operand" "")
		   (const_int 48)))
   (set (match_operand:DI 0 "register_operand" "")
	(ashiftrt:DI (match_dup 2)
		     (const_int 48)))]
  ""
{
  if (TARGET_BWX)
    {
      emit_insn (gen_extendhidi2x (operands[0],
				   force_reg (HImode, operands[1])));
      DONE;
    }

  if (unaligned_memory_operand (operands[1], HImode))
    {
      rtx seq
	= gen_unaligned_extendhidi (operands[0],
				    get_unaligned_address (operands[1], 2));

      alpha_set_memflags (seq, operands[1]);
      emit_insn (seq);
      DONE;
    }

  operands[1] = gen_lowpart (DImode, force_reg (HImode, operands[1]));
  operands[2] = gen_reg_rtx (DImode);
})

;; Here's how we sign extend an unaligned byte and halfword.  Doing this
;; as a pattern saves one instruction.  The code is similar to that for
;; the unaligned loads (see below).
;;
;; Operand 1 is the address + 1 (+2 for HI), operand 0 is the result.
(define_expand "unaligned_extendqidi"
  [(use (match_operand:QI 0 "register_operand" ""))
   (use (match_operand:DI 1 "address_operand" ""))]
  ""
{
  if (WORDS_BIG_ENDIAN)
    emit_insn (gen_unaligned_extendqidi_be (operands[0], operands[1]));
  else
    emit_insn (gen_unaligned_extendqidi_le (operands[0], operands[1]));
  DONE;
})

(define_expand "unaligned_extendqidi_le"
  [(set (match_dup 2) (match_operand:DI 1 "address_operand" ""))
   (set (match_dup 3)
	(mem:DI (and:DI (plus:DI (match_dup 2) (const_int -1))
			(const_int -8))))
   (set (match_dup 4)
	(ashift:DI (match_dup 3)
		   (minus:DI (const_int 64)
			     (ashift:DI
			      (and:DI (match_dup 2) (const_int 7))
			      (const_int 3)))))
   (set (subreg:DI (match_operand:QI 0 "register_operand" "") 0)
	(ashiftrt:DI (match_dup 4) (const_int 56)))]
  "! WORDS_BIG_ENDIAN"
{
  operands[2] = gen_reg_rtx (DImode);
  operands[3] = gen_reg_rtx (DImode);
  operands[4] = gen_reg_rtx (DImode);
})

(define_expand "unaligned_extendqidi_be"
  [(set (match_dup 2) (match_operand:DI 1 "address_operand" ""))
   (set (match_dup 3) (plus:DI (match_dup 2) (const_int -1)))
   (set (match_dup 4)
	(mem:DI (and:DI (match_dup 3)
			(const_int -8))))
   (set (match_dup 5) (plus:DI (match_dup 2) (const_int -2)))
   (set (match_dup 6)
	(ashift:DI (match_dup 4)
		   (ashift:DI
		     (and:DI
		       (plus:DI (match_dup 5) (const_int 1))
		       (const_int 7))
		     (const_int 3))))
   (set (subreg:DI (match_operand:QI 0 "register_operand" "") 0)
	(ashiftrt:DI (match_dup 6) (const_int 56)))]
  "WORDS_BIG_ENDIAN"
{
  operands[2] = gen_reg_rtx (DImode);
  operands[3] = gen_reg_rtx (DImode);
  operands[4] = gen_reg_rtx (DImode);
  operands[5] = gen_reg_rtx (DImode);
  operands[6] = gen_reg_rtx (DImode);
})

(define_expand "unaligned_extendhidi"
  [(use (match_operand:QI 0 "register_operand" ""))
   (use (match_operand:DI 1 "address_operand" ""))]
  ""
{
  operands[0] = gen_lowpart (DImode, operands[0]);
  emit_insn ((WORDS_BIG_ENDIAN
	      ? gen_unaligned_extendhidi_be
	      : gen_unaligned_extendhidi_le) (operands[0], operands[1]));
  DONE;
})

(define_expand "unaligned_extendhidi_le"
  [(set (match_dup 2) (match_operand:DI 1 "address_operand" ""))
   (set (match_dup 3)
	(mem:DI (and:DI (plus:DI (match_dup 2) (const_int -2))
			(const_int -8))))
   (set (match_dup 4)
	(ashift:DI (match_dup 3)
		   (minus:DI (const_int 64)
			     (ashift:DI
			      (and:DI (match_dup 2) (const_int 7))
			      (const_int 3)))))
   (set (match_operand:DI 0 "register_operand" "")
	(ashiftrt:DI (match_dup 4) (const_int 48)))]
  "! WORDS_BIG_ENDIAN"
{
  operands[2] = gen_reg_rtx (DImode);
  operands[3] = gen_reg_rtx (DImode);
  operands[4] = gen_reg_rtx (DImode);