Merge pull request #16 from sifive/0.13

Refactor code to support multiple debug spec versions.

src/target/Makefile.am

@@ -136,6 +136,8 @@ INTEL_IA32_SRC = \
 	x86_32_common.c
 
 RISCV_SRC = \
+	riscv/riscv-011.c \
+	riscv/riscv-013.c \
 	riscv/riscv.c
 
 noinst_HEADERS = \

src/target/riscv/opcodes.h

@@ -5,6 +5,13 @@
 #define S0      8
 #define S1      9
 
+/*
+ * Disabling the warning we get when some opcodes functions aren't used.  Not
+ * every user of this file uses every function, and it doesn't make sense to
+ * make them global. I suppose they could be macros.
+ */
+#pragma GCC diagnostic ignored "-Wunused-function"
+
 static uint32_t bits(uint32_t value, unsigned int hi, unsigned int lo) {
   return (value >> lo) & ((1 << (hi+1-lo)) - 1);
 }