File s390-improve-loadfpzero of Package libgcj43

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File s390-improve-loadfpzero of Package libgcj43

Index: gcc/config/s390/s390.c
===================================================================
*** gcc/config/s390/s390.c.orig
--- gcc/config/s390/s390.c
*************** legitimate_reload_constant_p (rtx op)
*** 2803,2808 ****
--- 2803,2814 ----
        && larl_operand (op, VOIDmode))
      return true;
  
+   /* Accept floating-point zero operands that fit into a single GPR.  */
+   if (GET_CODE (op) == CONST_DOUBLE
+       && s390_float_const_zero_p (op)
+       && GET_MODE_SIZE (GET_MODE (op)) <= UNITS_PER_WORD)
+     return true;
+ 
    /* Accept double-word operands that can be split.  */
    if (GET_CODE (op) == CONST_INT
        && trunc_int_for_mode (INTVAL (op), word_mode) != INTVAL (op))
*************** s390_preferred_reload_class (rtx op, enu
*** 2826,2840 ****
  {
    switch (GET_CODE (op))
      {
!       /* Constants we cannot reload must be forced into the
! 	 literal pool.  */
! 
!       case CONST_DOUBLE:
!       case CONST_INT:
! 	if (legitimate_reload_constant_p (op))
! 	  return class;
! 	else
! 	  return NO_REGS;
  
        /* If a symbolic constant or a PLUS is reloaded,
  	 it is most likely being used as an address, so
--- 2832,2849 ----
  {
    switch (GET_CODE (op))
      {
!       /* Constants we cannot reload into general registers
! 	 must be forced into the literal pool.  */
!     case CONST_DOUBLE:
!     case CONST_INT:
!       if (reg_class_subset_p (GENERAL_REGS, class)
! 	  && legitimate_reload_constant_p (op))
! 	return GENERAL_REGS;
!       else if (reg_class_subset_p (ADDR_REGS, class)
! 	       && legitimate_reload_constant_p (op))
! 	return ADDR_REGS;
!       else
! 	return NO_REGS;
  
        /* If a symbolic constant or a PLUS is reloaded,
  	 it is most likely being used as an address, so
Index: gcc/config/s390/s390.md
===================================================================
*** gcc/config/s390/s390.md.orig
--- gcc/config/s390/s390.md
***************
*** 2064,2072 ****
  
  (define_insn "*mov<mode>_64dfp"
    [(set (match_operand:DD_DF 0 "nonimmediate_operand"
! 			       "=f,f,d,f,f,R,T,d, d,RT")
          (match_operand:DD_DF 1 "general_operand"
! 			       " f,d,f,R,T,f,f,d,RT, d"))]
    "TARGET_64BIT && TARGET_DFP"
    "@
     ldr\t%0,%1
--- 2064,2072 ----
  
  (define_insn "*mov<mode>_64dfp"
    [(set (match_operand:DD_DF 0 "nonimmediate_operand"
! 			       "=f,f,d,f,f,R,T,d,d, d,RT")
          (match_operand:DD_DF 1 "general_operand"
! 			       " f,d,f,R,T,f,f,G,d,RT, d"))]
    "TARGET_64BIT && TARGET_DFP"
    "@
     ldr\t%0,%1
***************
*** 2076,2093 ****
     ldy\t%0,%1
     std\t%1,%0
     stdy\t%1,%0
     lgr\t%0,%1
     lg\t%0,%1
     stg\t%1,%0"
!   [(set_attr "op_type" "RR,RRE,RRE,RX,RXY,RX,RXY,RRE,RXY,RXY")
     (set_attr "type" "floaddf,floaddf,floaddf,floaddf,floaddf,
!                      fstoredf,fstoredf,lr,load,store")
!    (set_attr "z10prop" "*,*,*,*,*,*,*,z10_fr_E1,z10_fwd_A3,z10_rec")
  ])
  
  (define_insn "*mov<mode>_64"
!   [(set (match_operand:DD_DF 0 "nonimmediate_operand" "=f,f,f,R,T,d, d,RT")
!         (match_operand:DD_DF 1 "general_operand"       "f,R,T,f,f,d,RT, d"))]
    "TARGET_64BIT"
    "@
     ldr\t%0,%1
--- 2076,2094 ----
     ldy\t%0,%1
     std\t%1,%0
     stdy\t%1,%0
+    lghi\t%0,0
     lgr\t%0,%1
     lg\t%0,%1
     stg\t%1,%0"
!   [(set_attr "op_type" "RR,RRE,RRE,RX,RXY,RX,RXY,RI,RRE,RXY,RXY")
     (set_attr "type" "floaddf,floaddf,floaddf,floaddf,floaddf,
!                      fstoredf,fstoredf,*,lr,load,store")
!    (set_attr "z10prop" "*,*,*,*,*,*,*,z10_fwd_A1,z10_fr_E1,z10_fwd_A3,z10_rec")
  ])
  
  (define_insn "*mov<mode>_64"
!   [(set (match_operand:DD_DF 0 "nonimmediate_operand" "=f,f,f,R,T,d,d, d,RT")
!         (match_operand:DD_DF 1 "general_operand"       "f,R,T,f,f,G,d,RT, d"))]
    "TARGET_64BIT"
    "@
     ldr\t%0,%1
***************
*** 2095,2107 ****
     ldy\t%0,%1
     std\t%1,%0
     stdy\t%1,%0
     lgr\t%0,%1
     lg\t%0,%1
     stg\t%1,%0"
!   [(set_attr "op_type" "RR,RX,RXY,RX,RXY,RRE,RXY,RXY")
     (set_attr "type" "fload<mode>,fload<mode>,fload<mode>,
!                      fstore<mode>,fstore<mode>,lr,load,store")
!    (set_attr "z10prop" "*,*,*,*,*,z10_fr_E1,z10_fwd_A3,z10_rec")])
  
  (define_insn "*mov<mode>_31"
    [(set (match_operand:DD_DF 0 "nonimmediate_operand"
--- 2096,2109 ----
     ldy\t%0,%1
     std\t%1,%0
     stdy\t%1,%0
+    lghi\t%0,0
     lgr\t%0,%1
     lg\t%0,%1
     stg\t%1,%0"
!   [(set_attr "op_type" "RR,RX,RXY,RX,RXY,RI,RRE,RXY,RXY")
     (set_attr "type" "fload<mode>,fload<mode>,fload<mode>,
!                      fstore<mode>,fstore<mode>,*,lr,load,store")
!    (set_attr "z10prop" "*,*,*,*,*,z10_fwd_A1,z10_fr_E1,z10_fwd_A3,z10_rec")])
  
  (define_insn "*mov<mode>_31"
    [(set (match_operand:DD_DF 0 "nonimmediate_operand"
***************
*** 2172,2180 ****
  
  (define_insn "mov<mode>"
    [(set (match_operand:SD_SF 0 "nonimmediate_operand"
! 			       "=f,f,f,R,T,d,d,d,R,T")
          (match_operand:SD_SF 1 "general_operand"
! 			       " f,R,T,f,f,d,R,T,d,d"))]
    ""
    "@
     ler\t%0,%1
--- 2174,2182 ----
  
  (define_insn "mov<mode>"
    [(set (match_operand:SD_SF 0 "nonimmediate_operand"
! 			       "=f,f,f,R,T,d,d,d,d,R,T")
          (match_operand:SD_SF 1 "general_operand"
! 			       " f,R,T,f,f,G,d,R,T,d,d"))]
    ""
    "@
     ler\t%0,%1
***************
*** 2182,2196 ****
     ley\t%0,%1
     ste\t%1,%0
     stey\t%1,%0
     lr\t%0,%1
     l\t%0,%1
     ly\t%0,%1
     st\t%1,%0
     sty\t%1,%0"
!   [(set_attr "op_type" "RR,RX,RXY,RX,RXY,RR,RX,RXY,RX,RXY")
     (set_attr "type" "fload<mode>,fload<mode>,fload<mode>,
!                      fstore<mode>,fstore<mode>,lr,load,load,store,store")
!    (set_attr "z10prop" "*,*,*,*,*,z10_fr_E1,z10_fwd_A3,z10_fwd_A3,z10_rec,z10_rec")])
  
  ;
  ; movcc instruction pattern
--- 2184,2199 ----
     ley\t%0,%1
     ste\t%1,%0
     stey\t%1,%0
+    lhi\t%0,0
     lr\t%0,%1
     l\t%0,%1
     ly\t%0,%1
     st\t%1,%0
     sty\t%1,%0"
!   [(set_attr "op_type" "RR,RX,RXY,RX,RXY,RI,RR,RX,RXY,RX,RXY")
     (set_attr "type" "fload<mode>,fload<mode>,fload<mode>,
!                      fstore<mode>,fstore<mode>,*,lr,load,load,store,store")
!    (set_attr "z10prop" "*,*,*,*,*,z10_fwd_A1,z10_fr_E1,z10_fwd_A3,z10_fwd_A3,z10_rec,z10_rec")])
  
  ;
  ; movcc instruction pattern

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File s390-improve-loadfpzero of Package libgcj43

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