RISC-V: Cleanup the include/opcode/riscv-opc.h.

The include/opcode/riscv-opc.h file is no longer automatically generated,
so we remove the misleading comments and add new ones.  Besides, the CAUSE_*
macros and DECLARE_CAUSE are unused for binutils and gdb.  Therefore, remove
them, too.

	include/
	* opcode/riscv-opc.h: Cleanup and remove the unused macros.

2 files changed, 30 insertions, 33 deletions

diff --git a/include/ChangeLog b/include/ChangeLog
index 850da73..b357064 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,3 +1,7 @@
+2020-06-30  Nelson Chu  <nelson.chu@sifive.com>
+
+	* opcode/riscv-opc.h: Cleanup and remove the unused macros.
+
 2020-06-29  Alan Modra  <amodra@gmail.com>
 
 	* coff/internal.h: Use C style comments.
diff --git a/include/opcode/riscv-opc.h b/include/opcode/riscv-opc.h
index 34ea503..67bd334 100644
--- a/include/opcode/riscv-opc.h
+++ b/include/opcode/riscv-opc.h
@@ -1,6 +1,26 @@
-/* Automatically generated by parse-opcodes.  */
+/* riscv-opc.h.  RISC-V instruction opcode and CSR macros.
+   Copyright (C) 2011-2020 Free Software Foundation, Inc.
+   Contributed by Andrew Waterman
+
+   This file is part of GDB, GAS, and the GNU binutils.
+
+   GDB, GAS, and the GNU binutils are free software; you can redistribute
+   them and/or modify them under the terms of the GNU General Public
+   License as published by the Free Software Foundation; either version
+   3, or (at your option) any later version.
+
+   GDB, GAS, and the GNU binutils are distributed in the hope that they
+   will be useful, but WITHOUT ANY WARRANTY; without even the implied
+   warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+   the GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; see the file COPYING3. If not,
+   see <http://www.gnu.org/licenses/>.  */
+
 #ifndef RISCV_ENCODING_H
 #define RISCV_ENCODING_H
+/* Instruction opcode macros.  */
 #define MATCH_SLLI_RV32 0x1013
 #define MASK_SLLI_RV32  0xfe00707f
 #define MATCH_SRLI_RV32 0x5013
@@ -575,7 +595,7 @@
 #define MASK_CUSTOM3_RD_RS1  0x707f
 #define MATCH_CUSTOM3_RD_RS1_RS2 0x707b
 #define MASK_CUSTOM3_RD_RS1_RS2  0x707f
-/* Support CSR to priv spec 1.11.  */
+/* CSR addresses (priv spec v1.11).  */
 #define CSR_USTATUS 0x0
 #define CSR_UIE 0x4
 #define CSR_UTVEC 0x5
@@ -817,20 +837,7 @@
 #define CSR_MDBOUND 0x385
 #define CSR_MSCOUNTEREN 0x321
 #define CSR_MHCOUNTEREN 0x322
-
-#define CAUSE_MISALIGNED_FETCH 0x0
-#define CAUSE_FAULT_FETCH 0x1
-#define CAUSE_ILLEGAL_INSTRUCTION 0x2
-#define CAUSE_BREAKPOINT 0x3
-#define CAUSE_MISALIGNED_LOAD 0x4
-#define CAUSE_FAULT_LOAD 0x5
-#define CAUSE_MISALIGNED_STORE 0x6
-#define CAUSE_FAULT_STORE 0x7
-#define CAUSE_USER_ECALL 0x8
-#define CAUSE_SUPERVISOR_ECALL 0x9
-#define CAUSE_HYPERVISOR_ECALL 0xa
-#define CAUSE_MACHINE_ECALL 0xb
-#endif
+#endif /* RISCV_ENCODING_H.  */
 #ifdef DECLARE_INSN
 DECLARE_INSN(slli_rv32, MATCH_SLLI_RV32, MASK_SLLI_RV32)
 DECLARE_INSN(srli_rv32, MATCH_SRLI_RV32, MASK_SRLI_RV32)
@@ -1115,7 +1122,7 @@ DECLARE_INSN(custom3_rs1_rs2, MATCH_CUSTOM3_RS1_RS2, MASK_CUSTOM3_RS1_RS2)
 DECLARE_INSN(custom3_rd, MATCH_CUSTOM3_RD, MASK_CUSTOM3_RD)
 DECLARE_INSN(custom3_rd_rs1, MATCH_CUSTOM3_RD_RS1, MASK_CUSTOM3_RD_RS1)
 DECLARE_INSN(custom3_rd_rs1_rs2, MATCH_CUSTOM3_RD_RS1_RS2, MASK_CUSTOM3_RD_RS1_RS2)
-#endif
+#endif /* DECLARE_INSN.  */
 #ifdef DECLARE_CSR
 DECLARE_CSR(ustatus, CSR_USTATUS, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC_CLASS_DRAFT)
 DECLARE_CSR(uie, CSR_UIE, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC_CLASS_DRAFT)
@@ -1358,7 +1365,7 @@ DECLARE_CSR(mdbase, CSR_MDBASE, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC_CL
 DECLARE_CSR(mdbound, CSR_MDBOUND, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC_CLASS_1P10)
 DECLARE_CSR(mscounteren, CSR_MSCOUNTEREN, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC_CLASS_1P10)
 DECLARE_CSR(mhcounteren, CSR_MHCOUNTEREN, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC_CLASS_1P10)
-#endif
+#endif /* DECLARE_CSR.  */
 #ifdef DECLARE_CSR_ALIAS
 DECLARE_CSR_ALIAS(ubadaddr, CSR_UTVAL, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC_CLASS_1P10)
 DECLARE_CSR_ALIAS(sbadaddr, CSR_STVAL, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC_CLASS_1P10)
@@ -1366,18 +1373,4 @@ DECLARE_CSR_ALIAS(sptbr, CSR_SATP, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC
 DECLARE_CSR_ALIAS(mbadaddr, CSR_MTVAL, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC_CLASS_1P10)
 DECLARE_CSR_ALIAS(mucounteren, CSR_MCOUNTINHIBIT, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC_CLASS_1P10)
 DECLARE_CSR_ALIAS(dscratch, CSR_DSCRATCH0, CSR_CLASS_I, PRIV_SPEC_CLASS_1P9P1, PRIV_SPEC_CLASS_1P11)
-#endif
-#ifdef DECLARE_CAUSE
-DECLARE_CAUSE("misaligned fetch", CAUSE_MISALIGNED_FETCH)
-DECLARE_CAUSE("fault fetch", CAUSE_FAULT_FETCH)
-DECLARE_CAUSE("illegal instruction", CAUSE_ILLEGAL_INSTRUCTION)
-DECLARE_CAUSE("breakpoint", CAUSE_BREAKPOINT)
-DECLARE_CAUSE("misaligned load", CAUSE_MISALIGNED_LOAD)
-DECLARE_CAUSE("fault load", CAUSE_FAULT_LOAD)
-DECLARE_CAUSE("misaligned store", CAUSE_MISALIGNED_STORE)
-DECLARE_CAUSE("fault store", CAUSE_FAULT_STORE)
-DECLARE_CAUSE("user_ecall", CAUSE_USER_ECALL)
-DECLARE_CAUSE("supervisor_ecall", CAUSE_SUPERVISOR_ECALL)
-DECLARE_CAUSE("hypervisor_ecall", CAUSE_HYPERVISOR_ECALL)
-DECLARE_CAUSE("machine_ecall", CAUSE_MACHINE_ECALL)
-#endif
+#endif /* DECLARE_CSR_ALIAS.  */