rs6000.md

gcc库的原代码,对编程有很大帮助.

		    (const_int 0)))
   (set (match_operand:DI 0 "gpc_reg_operand" "=r")
	(zero_extend:DI (match_dup 1)))]
  "TARGET_POWERPC64"
  "rldicl. %0,%1,0,32"
  [(set_attr "type" "compare")])

(define_expand "extendsidi2"
  [(set (match_operand:DI 0 "gpc_reg_operand" "")
	(sign_extend:DI (match_operand:SI 1 "gpc_reg_operand" "")))]
  "TARGET_POWERPC64"
  "")

(define_insn ""
  [(set (match_operand:DI 0 "gpc_reg_operand" "=r,r")
	(sign_extend:DI (match_operand:SI 1 "lwa_operand" "m,r")))]
  "TARGET_POWERPC64"
  "@
   lwa%U1%X1 %0,%1
   extsw %0,%1"
  [(set_attr "type" "load,*")])

(define_insn ""
  [(set (match_operand:CC 0 "cc_reg_operand" "=x")
	(compare:CC (sign_extend:DI (match_operand:SI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (clobber (match_scratch:DI 2 "=r"))]
  "TARGET_POWERPC64"
  "extsw. %2,%1"
  [(set_attr "type" "compare")])

(define_insn ""
  [(set (match_operand:CC 2 "cc_reg_operand" "=x")
	(compare:CC (sign_extend:DI (match_operand:SI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (set (match_operand:DI 0 "gpc_reg_operand" "=r")
	(sign_extend:DI (match_dup 1)))]
  "TARGET_POWERPC64"
  "extsw. %0,%1"
  [(set_attr "type" "compare")])

(define_expand "zero_extendqisi2"
  [(set (match_operand:SI 0 "gpc_reg_operand" "")
	(zero_extend:SI (match_operand:QI 1 "gpc_reg_operand" "")))]
  ""
  "")

(define_insn ""
  [(set (match_operand:SI 0 "gpc_reg_operand" "=r,r")
	(zero_extend:SI (match_operand:QI 1 "reg_or_mem_operand" "m,r")))]
  ""
  "@
   lbz%U1%X1 %0,%1
   {rlinm|rlwinm} %0,%1,0,0xff"
  [(set_attr "type" "load,*")])

(define_insn ""
  [(set (match_operand:CC 0 "cc_reg_operand" "=x")
	(compare:CC (zero_extend:SI (match_operand:QI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (clobber (match_scratch:SI 2 "=r"))]
  ""
  "{andil.|andi.} %2,%1,0xff"
  [(set_attr "type" "compare")])

(define_insn ""
  [(set (match_operand:CC 2 "cc_reg_operand" "=x")
	(compare:CC (zero_extend:SI (match_operand:QI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
	(zero_extend:SI (match_dup 1)))]
  ""
  "{andil.|andi.} %0,%1,0xff"
  [(set_attr "type" "compare")])

(define_expand "extendqisi2"
  [(use (match_operand:SI 0 "gpc_reg_operand" ""))
   (use (match_operand:QI 1 "gpc_reg_operand" ""))]
  ""
  "
{
  if (TARGET_POWERPC)
    emit_insn (gen_extendqisi2_ppc (operands[0], operands[1]));
  else if (TARGET_POWER)
    emit_insn (gen_extendqisi2_power (operands[0], operands[1]));
  else
    emit_insn (gen_extendqisi2_no_power (operands[0], operands[1]));
  DONE;
}")

(define_insn "extendqisi2_ppc"
  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
	(sign_extend:SI (match_operand:QI 1 "gpc_reg_operand" "r")))]
  "TARGET_POWERPC"
  "extsb %0,%1")

(define_insn ""
  [(set (match_operand:CC 0 "cc_reg_operand" "=x")
	(compare:CC (sign_extend:SI (match_operand:QI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (clobber (match_scratch:SI 2 "=r"))]
  "TARGET_POWERPC"
  "extsb. %2,%1"
  [(set_attr "type" "compare")])

(define_insn ""
  [(set (match_operand:CC 2 "cc_reg_operand" "=x")
	(compare:CC (sign_extend:SI (match_operand:QI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
	(sign_extend:SI (match_dup 1)))]
  "TARGET_POWERPC"
  "extsb. %0,%1"
  [(set_attr "type" "compare")])

(define_expand "extendqisi2_power"
  [(parallel [(set (match_dup 2)
		   (ashift:SI (match_operand:QI 1 "gpc_reg_operand" "")
			      (const_int 24)))
	      (clobber (scratch:SI))])
   (parallel [(set (match_operand:SI 0 "gpc_reg_operand" "")
		   (ashiftrt:SI (match_dup 2)
				(const_int 24)))
	      (clobber (scratch:SI))])]
  "TARGET_POWER"
  "
{ operands[1] = gen_lowpart (SImode, operands[1]);
  operands[2] = gen_reg_rtx (SImode); }")

(define_expand "extendqisi2_no_power"
  [(set (match_dup 2)
	(ashift:SI (match_operand:QI 1 "gpc_reg_operand" "")
		   (const_int 24)))
   (set (match_operand:SI 0 "gpc_reg_operand" "")
	(ashiftrt:SI (match_dup 2)
		     (const_int 24)))]
  "! TARGET_POWER && ! TARGET_POWERPC"
  "
{ operands[1] = gen_lowpart (SImode, operands[1]);
  operands[2] = gen_reg_rtx (SImode); }")

(define_expand "zero_extendqihi2"
  [(set (match_operand:HI 0 "gpc_reg_operand" "")
	(zero_extend:HI (match_operand:QI 1 "gpc_reg_operand" "")))]
  ""
  "")

(define_insn ""
  [(set (match_operand:HI 0 "gpc_reg_operand" "=r,r")
	(zero_extend:HI (match_operand:QI 1 "reg_or_mem_operand" "m,r")))]
  ""
  "@
   lbz%U1%X1 %0,%1
   {rlinm|rlwinm} %0,%1,0,0xff"
  [(set_attr "type" "load,*")])

(define_insn ""
  [(set (match_operand:CC 0 "cc_reg_operand" "=x")
	(compare:CC (zero_extend:HI (match_operand:QI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (clobber (match_scratch:HI 2 "=r"))]
  ""
  "{andil.|andi.} %2,%1,0xff"
  [(set_attr "type" "compare")])

(define_insn ""
  [(set (match_operand:CC 2 "cc_reg_operand" "=x")
	(compare:CC (zero_extend:HI (match_operand:QI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (set (match_operand:HI 0 "gpc_reg_operand" "=r")
	(zero_extend:HI (match_dup 1)))]
  ""
  "{andil.|andi.} %0,%1,0xff"
  [(set_attr "type" "compare")])

(define_expand "extendqihi2"
  [(use (match_operand:HI 0 "gpc_reg_operand" ""))
   (use (match_operand:QI 1 "gpc_reg_operand" ""))]
  ""
  "
{
  if (TARGET_POWERPC)
    emit_insn (gen_extendqihi2_ppc (operands[0], operands[1]));
  else if (TARGET_POWER)
    emit_insn (gen_extendqihi2_power (operands[0], operands[1]));
  else
    emit_insn (gen_extendqihi2_no_power (operands[0], operands[1]));
  DONE;
}")

(define_insn "extendqihi2_ppc"
  [(set (match_operand:HI 0 "gpc_reg_operand" "=r")
	(sign_extend:HI (match_operand:QI 1 "gpc_reg_operand" "r")))]
  "TARGET_POWERPC"
  "extsb %0,%1")

(define_insn ""
  [(set (match_operand:CC 0 "cc_reg_operand" "=x")
	(compare:CC (sign_extend:HI (match_operand:QI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (clobber (match_scratch:HI 2 "=r"))]
  "TARGET_POWERPC"
  "extsb. %2,%1"
  [(set_attr "type" "compare")])

(define_insn ""
  [(set (match_operand:CC 2 "cc_reg_operand" "=x")
	(compare:CC (sign_extend:HI (match_operand:QI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (set (match_operand:HI 0 "gpc_reg_operand" "=r")
	(sign_extend:HI (match_dup 1)))]
  "TARGET_POWERPC"
  "extsb. %0,%1"
  [(set_attr "type" "compare")])

(define_expand "extendqihi2_power"
  [(parallel [(set (match_dup 2)
		   (ashift:SI (match_operand:QI 1 "gpc_reg_operand" "")
			      (const_int 24)))
	      (clobber (scratch:SI))])
   (parallel [(set (match_operand:HI 0 "gpc_reg_operand" "")
		   (ashiftrt:SI (match_dup 2)
				(const_int 24)))
	      (clobber (scratch:SI))])]
  "TARGET_POWER"
  "
{ operands[0] = gen_lowpart (SImode, operands[0]);
  operands[1] = gen_lowpart (SImode, operands[1]);
  operands[2] = gen_reg_rtx (SImode); }")

(define_expand "extendqihi2_no_power"
  [(set (match_dup 2)
	(ashift:SI (match_operand:QI 1 "gpc_reg_operand" "")
		   (const_int 24)))
   (set (match_operand:HI 0 "gpc_reg_operand" "")
	(ashiftrt:SI (match_dup 2)
		     (const_int 24)))]
  "! TARGET_POWER && ! TARGET_POWERPC"
  "
{ operands[0] = gen_lowpart (SImode, operands[0]);
  operands[1] = gen_lowpart (SImode, operands[1]);
  operands[2] = gen_reg_rtx (SImode); }")

(define_expand "zero_extendhisi2"
  [(set (match_operand:SI 0 "gpc_reg_operand" "")
	(zero_extend:SI (match_operand:HI 1 "gpc_reg_operand" "")))]
  ""
  "")

(define_insn ""
  [(set (match_operand:SI 0 "gpc_reg_operand" "=r,r")
	(zero_extend:SI (match_operand:HI 1 "reg_or_mem_operand" "m,r")))]
  ""
  "@
   lhz%U1%X1 %0,%1
   {rlinm|rlwinm} %0,%1,0,0xffff"
  [(set_attr "type" "load,*")])

(define_insn ""
  [(set (match_operand:CC 0 "cc_reg_operand" "=x")
	(compare:CC (zero_extend:SI (match_operand:HI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (clobber (match_scratch:SI 2 "=r"))]
  ""
  "{andil.|andi.} %2,%1,0xffff"
  [(set_attr "type" "compare")])

(define_insn ""
  [(set (match_operand:CC 2 "cc_reg_operand" "=x")
	(compare:CC (zero_extend:SI (match_operand:HI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
	(zero_extend:SI (match_dup 1)))]
  ""
  "{andil.|andi.} %0,%1,0xffff"
  [(set_attr "type" "compare")])

(define_expand "extendhisi2"
  [(set (match_operand:SI 0 "gpc_reg_operand" "")
	(sign_extend:SI (match_operand:HI 1 "gpc_reg_operand" "")))]
  ""
  "")

(define_insn ""
  [(set (match_operand:SI 0 "gpc_reg_operand" "=r,r")
	(sign_extend:SI (match_operand:HI 1 "reg_or_mem_operand" "m,r")))]
  ""
  "@
   lha%U1%X1 %0,%1
   {exts|extsh} %0,%1"
  [(set_attr "type" "load,*")])

(define_insn ""
  [(set (match_operand:CC 0 "cc_reg_operand" "=x")
	(compare:CC (sign_extend:SI (match_operand:HI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (clobber (match_scratch:SI 2 "=r"))]
  ""
  "{exts.|extsh.} %2,%1"
  [(set_attr "type" "compare")])

(define_insn ""
  [(set (match_operand:CC 2 "cc_reg_operand" "=x")
	(compare:CC (sign_extend:SI (match_operand:HI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
	(sign_extend:SI (match_dup 1)))]
  ""
  "{exts.|extsh.} %0,%1"
  [(set_attr "type" "compare")])

;; Fixed-point arithmetic insns.

;; Discourage ai/addic because of carry but provide it in an alternative
;; allowing register zero as source.
(define_insn "addsi3"
  [(set (match_operand:SI 0 "gpc_reg_operand" "=r,r,?r,r")
	(plus:SI (match_operand:SI 1 "gpc_reg_operand" "%r,b,r,b")
		 (match_operand:SI 2 "add_operand" "r,I,I,J")))]
  ""
  "@
   {cax|add} %0,%1,%2
   {cal %0,%2(%1)|addi %0,%1,%2}
   {ai|addic} %0,%1,%2
   {cau|addis} %0,%1,%u2")

(define_insn ""
  [(set (match_operand:CC 0 "cc_reg_operand" "=x,x")
	(compare:CC (plus:SI (match_operand:SI 1 "gpc_reg_operand" "%r,r")
			     (match_operand:SI 2 "reg_or_short_operand" "r,I"))
		    (const_int 0)))
   (clobber (match_scratch:SI 3 "=r,r"))]
  ""
  "@
   {cax.|add.} %3,%1,%2
   {ai.|addic.} %3,%1,%2"
  [(set_attr "type" "compare")])

(define_insn ""
  [(set (match_operand:CC 3 "cc_reg_operand" "=x,x")
	(compare:CC (plus:SI (match_operand:SI 1 "gpc_reg_operand" "%r,r")
			     (match_operand:SI 2 "reg_or_short_operand" "r,I"))
		    (const_int 0)))
   (set (match_operand:SI 0 "gpc_reg_operand" "=r,r")
	(plus:SI (match_dup 1) (match_dup 2)))]
  ""
  "@
   {cax.|add.} %0,%1,%2
   {ai.|addic.} %0,%1,%2"
  [(set_attr "type" "compare")])

;; Split an add that we can't do in one insn into two insns, each of which
;; does one 16-bit part.  This is used by combine.  Note that the low-order
;; add should be last in case the result gets used in an address.

(define_split
  [(set (match_operand:SI 0 "gpc_reg_operand" "")
	(plus:SI (match_operand:SI 1 "gpc_reg_operand" "")
		 (match_operand:SI 2 "non_add_cint_operand" "")))]
  ""
  [(set (match_dup 0) (plus:SI (match_dup 1) (match_dup 3)))
   (set (match_dup 0) (plus:SI (match_dup 0) (match_dup 4)))]
"
{
  int low = INTVAL (operands[2]) & 0xffff;
  int high = (unsigned) INTVAL (operands[2]) >> 16;

  if (low & 0x8000)
    high++, low |= 0xffff0000;

  operands[3] = gen_rtx (CONST_INT, VOIDmode, high << 16);
  operands[4] = gen_rtx (CONST_INT, VOIDmode, low);
}")

(define_insn "one_cmplsi2"
  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
	(not:SI (match_operand:SI 1 "gpc_reg_operand" "r")))]
  ""
  "nor %0,%1,%1")

(define_insn ""
  [(set (match_operand:CC 0 "cc_reg_operand" "=x")
	(compare:CC (not:SI (match_operand:SI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (clobber (match_scratch:SI 2 "=r"))]
  ""
  "nor. %2,%1,%1"
  [(set_attr "type" "compare")])

(define_insn ""
  [(set (match_operand:CC 2 "cc_reg_operand" "=x")
	(compare:CC (not:SI (match_operand:SI 1 "gpc_reg_operand" "r"))
		    (const_int 0)))
   (set (match_operand:SI 0 "gpc_reg_operand" "=r")
	(not:SI (match_dup 1)))]
  ""
  "nor. %0,%2,%1"
  [(set_attr "type" "compare")])

(define_insn ""
  [(set (match_operand:SI 0 "gpc_reg_operand" "=r")
	(minus:SI (match_operand:SI 1 "reg_or_short_operand" "rI")
		  (match_operand:SI 2 "gpc_reg_operand" "r")))]
  "! TARGET_POWERPC"
  "{sf%I1|subf%I1c} %0,%2,%1")

(define_insn ""
  [(set (match_operand:SI 0 "gpc_reg_operand" "=r,r")
	(minus:SI (match_operand:SI 1 "reg_or_short_operand" "r,I")
		  (match_operand:SI 2 "gpc_reg_operand" "r,r")))]
  "TARGET_POWERPC"
  "@
   subf %0,%2,%1
   subfic %0,%2,%1")

(define_insn ""
  [(set (match_operand:CC 0 "cc_reg_operand" "=x")
	(compare:CC (minus:SI (match_operand:SI 1 "gpc_reg_operand" "r")
			      (match_operand:SI 2 "gpc_reg_operand" "r"))
		    (const_int 0)))