dsp16xx.md: Rewrite for more efficient code and add scheduling support.

	* config/dsp16xx/dsp16xx.md: Rewrite for more efficient code and
	add scheduling support.
	* config/dsp16xx/dsp16xx.h: Rewrite for more efficient code.
	* config/dsp16xx/dsp16xx.c: Rewrite for more efficient code.
	* config/dsp16xx/dsp16xx-protos.h: Add new function prototypes.

From-SVN: r46248

gcc/config/dsp16xx/dsp16xx-protos.h

@@ -29,6 +29,8 @@ extern int sp_operand PARAMS ((rtx, enum machine_mode));
 extern int sp_operand2 PARAMS ((rtx, enum machine_mode));
 extern int nonmemory_arith_operand PARAMS ((rtx, enum machine_mode));
 extern int dsp16xx_comparison_operator PARAMS ((rtx, enum machine_mode));
+extern int unx_comparison_operator PARAMS ((rtx, enum machine_mode));
+extern int signed_comparison_operator PARAMS ((rtx, enum machine_mode));
 
 extern void notice_update_cc PARAMS ((rtx));
 extern void double_reg_from_memory PARAMS ((rtx[]));
@@ -77,7 +79,11 @@ extern void asm_output_local PARAMS ((FILE *, const char *, int, int));
 extern void asm_output_float PARAMS ((FILE *, double));
 extern void asm_output_long PARAMS ((FILE *, long));
 extern void dsp16xx_file_start PARAMS ((void));
+extern void coff_dsp16xx_file_start PARAMS ((FILE *));
+extern void luxworks_dsp16xx_file_start PARAMS ((FILE *));
 extern struct rtx_def *(*dsp16xx_compare_gen) PARAMS (());
 extern int hard_regno_mode_ok PARAMS ((int, enum machine_mode));
 extern enum reg_class dsp16xx_reg_class_from_letter PARAMS ((int));
 extern int regno_reg_class PARAMS ((int));
+extern void function_prologue PARAMS ((FILE *, int));
+extern void function_epilogue PARAMS ((FILE *, int));