Patch to improve x86 FP negate patterns

[John Wehle]

This sets the type attribute for the FP negate patterns and adds
a new pattern which matches negating while extending SF to XF.

ChangeLog:

Thu Apr 22 00:58:25 EDT 1999  John Wehle  (john@feith.com)

	* i386.md (negsf2, negdf2, negxf2): Set the type
	attribute to fpop.
	(negxf2+2): New pattern.

Enjoy!

-- John Wehle
------------------8<------------------------8<------------------------
*** gcc/config/i386/i386.md.ORIGINAL	Thu Apr 22 00:44:35 1999
--- gcc/config/i386/i386.md.JLW	Thu Apr 22 00:37:47 1999
*************** byte_xor_operation:
*** 4765,4795 ****
    [(set (match_operand:SF 0 "register_operand" "=f")
  	(neg:SF (match_operand:SF 1 "register_operand" "0")))]
    "TARGET_80387"
!   "fchs")
  
  (define_insn "negdf2"
    [(set (match_operand:DF 0 "register_operand" "=f")
  	(neg:DF (match_operand:DF 1 "register_operand" "0")))]
    "TARGET_80387"
!   "fchs")
  
  (define_insn ""
    [(set (match_operand:DF 0 "register_operand" "=f")
  	(neg:DF (float_extend:DF (match_operand:SF 1 "register_operand" "0"))))]
    "TARGET_80387"
!   "fchs")
  
  (define_insn "negxf2"
    [(set (match_operand:XF 0 "register_operand" "=f")
  	(neg:XF (match_operand:XF 1 "register_operand" "0")))]
    "TARGET_80387"
!   "fchs")
  
  (define_insn ""
    [(set (match_operand:XF 0 "register_operand" "=f")
  	(neg:XF (float_extend:XF (match_operand:DF 1 "register_operand" "0"))))]
    "TARGET_80387"
!   "fchs")
  
  ;; Absolute value instructions
  
--- 4765,4807 ----
    [(set (match_operand:SF 0 "register_operand" "=f")
  	(neg:SF (match_operand:SF 1 "register_operand" "0")))]
    "TARGET_80387"
!   "fchs"
!   [(set_attr "type" "fpop")])
  
  (define_insn "negdf2"
    [(set (match_operand:DF 0 "register_operand" "=f")
  	(neg:DF (match_operand:DF 1 "register_operand" "0")))]
    "TARGET_80387"
!   "fchs"
!   [(set_attr "type" "fpop")])
  
  (define_insn ""
    [(set (match_operand:DF 0 "register_operand" "=f")
  	(neg:DF (float_extend:DF (match_operand:SF 1 "register_operand" "0"))))]
    "TARGET_80387"
!   "fchs"
!   [(set_attr "type" "fpop")])
  
  (define_insn "negxf2"
    [(set (match_operand:XF 0 "register_operand" "=f")
  	(neg:XF (match_operand:XF 1 "register_operand" "0")))]
    "TARGET_80387"
!   "fchs"
!   [(set_attr "type" "fpop")])
  
  (define_insn ""
    [(set (match_operand:XF 0 "register_operand" "=f")
  	(neg:XF (float_extend:XF (match_operand:DF 1 "register_operand" "0"))))]
    "TARGET_80387"
!   "fchs"
!   [(set_attr "type" "fpop")])
! 
! (define_insn ""
!   [(set (match_operand:XF 0 "register_operand" "=f")
! 	(neg:XF (float_extend:XF (match_operand:SF 1 "register_operand" "0"))))]
!   "TARGET_80387"
!   "fchs"
!   [(set_attr "type" "fpop")])
  
  ;; Absolute value instructions
  
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|    John Wehle    |     Fax: 1-215-540-5495  |                         |
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