[NDS32] Add -march=v3j.

gcc/
	* config/nds32/nds32-opts.h (nds32_arch_type): Add ARCH_V3J.
	* config/nds32/nds32.c (nds32_option_override): Consider ARCH_V3J.
	* config/nds32/nds32.h (TARGET_ISA_V3): Add ARCH_V3J checking.
	* config/nds32/nds32.opt (march): Add enum value Value(ARCH_V3J).

From-SVN: r261123

gcc/ChangeLog

 2018-06-03  Chung-Ju Wu  <jasonwucj@gmail.com>
 
+	* config/nds32/nds32-opts.h (nds32_arch_type): Add ARCH_V3J.
+	* config/nds32/nds32.c (nds32_option_override): Consider ARCH_V3J.
+	* config/nds32/nds32.h (TARGET_ISA_V3): Add ARCH_V3J checking.
+	* config/nds32/nds32.opt (march): Add enum value Value(ARCH_V3J).
+
+2018-06-03  Chung-Ju Wu  <jasonwucj@gmail.com>
+
 	* common/config/nds32/nds32-common.c (nds32_option_optimization_table):
 	Disable -fdelete-null-pointer-checks for ELF toolchain.
 

gcc/config/nds32/nds32-opts.h

@@ -29,6 +29,7 @@ enum nds32_arch_type
 {
   ARCH_V2,
   ARCH_V3,
+  ARCH_V3J,
   ARCH_V3M,
   ARCH_V3F,
   ARCH_V3S

gcc/config/nds32/nds32.c

@@ -4087,7 +4087,9 @@ nds32_option_override (void)
     }
   if (TARGET_ISA_V3)
     {
-      /* Under V3 ISA, currently nothing should be strictly set.  */
+      /* If this is ARCH_V3J, we need to enable TARGET_REDUCED_REGS.  */
+      if (nds32_arch_option == ARCH_V3J)
+	target_flags |= MASK_REDUCED_REGS;
     }
   if (TARGET_ISA_V3M)
     {

gcc/config/nds32/nds32.h

@@ -853,6 +853,7 @@ enum nds32_builtins
 
 #define TARGET_ISA_V3 \
   (nds32_arch_option == ARCH_V3 \
+   || nds32_arch_option == ARCH_V3J \
    || nds32_arch_option == ARCH_V3F \
    || nds32_arch_option == ARCH_V3S)
 #define TARGET_ISA_V3M  (nds32_arch_option == ARCH_V3M)

gcc/config/nds32/nds32.opt

@@ -177,6 +177,9 @@ EnumValue
 Enum(nds32_arch_type) String(v3) Value(ARCH_V3)
 
 EnumValue
+Enum(nds32_arch_type) String(v3j) Value(ARCH_V3J)
+
+EnumValue
 Enum(nds32_arch_type) String(v3m) Value(ARCH_V3M)
 
 EnumValue