xtensa: drop unimplemented floating point operations

xtensa ISA never implemented FP division, reciprocal, square root and
inverse square root as single opcode. Remove patterns that can emit
them.

2014-10-09  Max Filippov  <jcmvbkbc@gmail.com>

gcc/
    * config/xtensa/xtensa.md (divsf3, *recipsf2, sqrtsf2, *rsqrtsf2):
    remove.

From-SVN: r216233

gcc/ChangeLog

+2014-10-14  Max Filippov  <jcmvbkbc@gmail.com>
+
+	* config/xtensa/xtensa.md (divsf3, *recipsf2, sqrtsf2, *rsqrtsf2):
+	remove.
+
 2014-10-14  Andrew Pinski  <apinski@cavium.com>
 
 	* explow.c (convert_memory_address_addr_space): Rename to ...

gcc/config/xtensa/xtensa.md

@@ -82,7 +82,7 @@
 ;; Attributes.
 
 (define_attr "type"
-  "unknown,jump,call,load,store,move,arith,multi,nop,farith,fmadd,fdiv,fsqrt,fconv,fload,fstore,mul16,mul32,div32,mac16,rsr,wsr,entry"
+  "unknown,jump,call,load,store,move,arith,multi,nop,farith,fmadd,fconv,fload,fstore,mul16,mul32,div32,mac16,rsr,wsr,entry"
   (const_string "unknown"))
 
 (define_attr "mode"
@@ -360,26 +360,6 @@
    (set_attr "mode"	"SI")
    (set_attr "length"	"3")])
 
-(define_insn "divsf3"
-  [(set (match_operand:SF 0 "register_operand" "=f")
-	(div:SF (match_operand:SF 1 "register_operand" "f")
-		(match_operand:SF 2 "register_operand" "f")))]
-  "TARGET_HARD_FLOAT_DIV"
-  "div.s\t%0, %1, %2"
-  [(set_attr "type"	"fdiv")
-   (set_attr "mode"	"SF")
-   (set_attr "length"	"3")])
-
-(define_insn "*recipsf2"
-  [(set (match_operand:SF 0 "register_operand" "=f")
-	(div:SF (match_operand:SF 1 "const_float_1_operand" "")
-		(match_operand:SF 2 "register_operand" "f")))]
-  "TARGET_HARD_FLOAT_RECIP && flag_unsafe_math_optimizations"
-  "recip.s\t%0, %2"
-  [(set_attr "type"	"fdiv")
-   (set_attr "mode"	"SF")
-   (set_attr "length"	"3")])
-
 
 ;; Remainders.
 
@@ -404,28 +384,6 @@
    (set_attr "length"	"3")])
 
 
-;; Square roots.
-
-(define_insn "sqrtsf2"
-  [(set (match_operand:SF 0 "register_operand" "=f")
-	(sqrt:SF (match_operand:SF 1 "register_operand" "f")))]
-  "TARGET_HARD_FLOAT_SQRT"
-  "sqrt.s\t%0, %1"
-  [(set_attr "type"	"fsqrt")
-   (set_attr "mode"	"SF")
-   (set_attr "length"	"3")])
-
-(define_insn "*rsqrtsf2"
-  [(set (match_operand:SF 0 "register_operand" "=f")
-	(div:SF (match_operand:SF 1 "const_float_1_operand" "")
-		(sqrt:SF (match_operand:SF 2 "register_operand" "f"))))]
-  "TARGET_HARD_FLOAT_RSQRT && flag_unsafe_math_optimizations"
-  "rsqrt.s\t%0, %2"
-  [(set_attr "type"	"fsqrt")
-   (set_attr "mode"	"SF")
-   (set_attr "length"	"3")])
-
-
 ;; Absolute value.
 
 (define_insn "abssi2"