[NDS32] Refine movcc, cmov, cstore and cbranch patterns.

gcc/
	* config/nds32/nds32-md-auxiliary.c (nds32_inverse_cond_code,
	nds32_cond_code_str, output_cond_branch,
	output_cond_branch_compare_zero, nds32_expand_cbranch,
	nds32_expand_cstore, nds32_expand_movcc,
	nds32_output_cbranchsi4_equality_zero,
	nds32_output_cbranchsi4_equality_reg,
	nds32_output_cbranchsi4_equality_reg_or_const_int,
	nds32_output_cbranchsi4_greater_less_zero: New functions.
	* config/nds32/nds32-protos.h (nds32_expand_cbranch,
	nds32_expand_cstore, nds32_expand_movcc,
	nds32_output_cbranchsi4_equality_zero,
	nds32_output_cbranchsi4_equality_reg,
	nds32_output_cbranchsi4_equality_reg_or_const_int,
	nds32_output_cbranchsi4_greater_less_zero): Declare.
	* config/nds32/predicates.md (nds32_movecc_comparison_operator,
	nds32_rimm11s_operand): New predicates.
	* config/nds32/nds32.h (nds32_expand_result_type): New enum type.
	* config/nds32/nds32.md: Rewrite all the branch and conditional move
	patterns.

Co-Authored-By: Kito Cheng <kito.cheng@gmail.com>

From-SVN: r259070

gcc/ChangeLog

+2018-04-04  Chung-Ju Wu  <jasonwucj@gmail.com>
+	    Kito Cheng  <kito.cheng@gmail.com>
+
+	* config/nds32/nds32-md-auxiliary.c (nds32_inverse_cond_code,
+	nds32_cond_code_str, output_cond_branch,
+	output_cond_branch_compare_zero, nds32_expand_cbranch,
+	nds32_expand_cstore, nds32_expand_movcc,
+	nds32_output_cbranchsi4_equality_zero,
+	nds32_output_cbranchsi4_equality_reg,
+	nds32_output_cbranchsi4_equality_reg_or_const_int,
+	nds32_output_cbranchsi4_greater_less_zero: New functions.
+	* config/nds32/nds32-protos.h (nds32_expand_cbranch,
+	nds32_expand_cstore, nds32_expand_movcc,
+	nds32_output_cbranchsi4_equality_zero,
+	nds32_output_cbranchsi4_equality_reg,
+	nds32_output_cbranchsi4_equality_reg_or_const_int,
+	nds32_output_cbranchsi4_greater_less_zero): Declare.
+	* config/nds32/predicates.md (nds32_movecc_comparison_operator,
+	nds32_rimm11s_operand): New predicates.
+	* config/nds32/nds32.h (nds32_expand_result_type): New enum type.
+	* config/nds32/nds32.md: Rewrite all the branch and conditional move
+	patterns.
+
 2018-04-04  Kito Cheng  <kito.cheng@gmail.com>
 
 	* config/nds32/nds32-doubleword.md: Refine all the instruction type.

gcc/config/nds32/nds32-protos.h

@@ -116,6 +116,16 @@ extern bool nds32_symbol_load_store_p (rtx_insn *);
 extern const char *nds32_output_casesi_pc_relative (rtx *);
 extern const char *nds32_output_casesi (rtx *);
 
+/* Auxiliary functions for conditional branch generation.  */
+
+extern enum nds32_expand_result_type nds32_expand_cbranch (rtx *);
+extern enum nds32_expand_result_type nds32_expand_cstore (rtx *);
+
+/* Auxiliary functions for conditional move generation.  */
+
+extern enum nds32_expand_result_type nds32_expand_movcc (rtx *);
+
+
 /* Auxiliary functions to identify long-call symbol.  */
 extern bool nds32_long_call_p (rtx);
 
@@ -132,6 +142,12 @@ extern const char *nds32_output_32bit_load (rtx *, int);
 extern const char *nds32_output_32bit_load_s (rtx *, int);
 extern const char *nds32_output_smw_single_word (rtx *);
 extern const char *nds32_output_lmw_single_word (rtx *);
+extern const char *nds32_output_cbranchsi4_equality_zero (rtx_insn *, rtx *);
+extern const char *nds32_output_cbranchsi4_equality_reg (rtx_insn *, rtx *);
+extern const char *nds32_output_cbranchsi4_equality_reg_or_const_int (rtx_insn *,
+								      rtx *);
+extern const char *nds32_output_cbranchsi4_greater_less_zero (rtx_insn *, rtx *);
+
 
 /* Auxiliary functions to output stack push/pop instruction.  */
 

gcc/config/nds32/nds32.h

@@ -33,6 +33,14 @@
 #define NDS32_SYMBOL_REF_RODATA_P(x) \
   ((SYMBOL_REF_FLAGS (x) & NDS32_SYMBOL_FLAG_RODATA) != 0)
 
+/* Classifies expand result for expand helper function.  */
+enum nds32_expand_result_type
+{
+  EXPAND_DONE,
+  EXPAND_FAIL,
+  EXPAND_CREATE_TEMPLATE
+};
+
 /* Computing the Length of an Insn.  */
 #define ADJUST_INSN_LENGTH(INSN, LENGTH) \
   (LENGTH = nds32_adjust_insn_length (INSN, LENGTH))

gcc/config/nds32/predicates.md

@@ -24,6 +24,9 @@
 (define_predicate "nds32_greater_less_comparison_operator"
   (match_code "gt,ge,lt,le"))
 
+(define_predicate "nds32_movecc_comparison_operator"
+  (match_code "eq,ne,le,leu,ge,geu"))
+
 (define_special_predicate "nds32_logical_binary_operator"
   (match_code "and,ior,xor"))
 
@@ -39,6 +42,11 @@
        (and (match_operand 0 "const_int_operand")
 	    (match_test "satisfies_constraint_Is15 (op)"))))
 
+(define_predicate "nds32_rimm11s_operand"
+  (ior (match_operand 0 "register_operand")
+       (and (match_operand 0 "const_int_operand")
+	    (match_test "satisfies_constraint_Is11 (op)"))))
+
 (define_predicate "nds32_imm5u_operand"
   (and (match_operand 0 "const_int_operand")
        (match_test "satisfies_constraint_Iu05 (op)")))