From 766f6d170c56d1d7b03e81f64d069386d0a7c5dd Mon Sep 17 00:00:00 2001
From: Tsukasa OI <research_trasio@irq.a4lg.com>
Date: Mon, 24 Jul 2023 05:01:12 +0000
Subject: RISC-V: Prohibit the 'Zcf' extension on RV64

As per:
<https://github.com/riscv/riscv-code-size-reduction/issues/221>,
the 'Zcf' extension does not exist on RV64.  This is reflected on the
version 1.0.4-1 of the code size reduction specification:
<https://github.com/riscv/riscv-code-size-reduction/releases/tag/v1.0.4-1>.

This commit prohibits the combination: RV64 (or any ISA with XLEN > 32)
and the 'Zcf' extension.

bfd/ChangeLog:

	* elfxx-riscv.c (riscv_parse_check_conflicts): Prohibit
	combination of RV64 and 'Zcf'.

gas/ChangeLog:

	* testsuite/gas/riscv/march-fail-rv64i_zcf.d: New test.
	* testsuite/gas/riscv/march-fail-rv64i_zcf.l: Likewise.
---
 gas/testsuite/gas/riscv/march-fail-rv64i_zcf.d | 3 +++
 gas/testsuite/gas/riscv/march-fail-rv64i_zcf.l | 2 ++
 2 files changed, 5 insertions(+)
 create mode 100644 gas/testsuite/gas/riscv/march-fail-rv64i_zcf.d
 create mode 100644 gas/testsuite/gas/riscv/march-fail-rv64i_zcf.l

(limited to 'gas')

diff --git a/gas/testsuite/gas/riscv/march-fail-rv64i_zcf.d b/gas/testsuite/gas/riscv/march-fail-rv64i_zcf.d
new file mode 100644
index 0000000..1b70a9e
--- /dev/null
+++ b/gas/testsuite/gas/riscv/march-fail-rv64i_zcf.d
@@ -0,0 +1,3 @@
+#as: -march=rv64i_zcf
+#source: empty.s
+#error_output: march-fail-rv64i_zcf.l
diff --git a/gas/testsuite/gas/riscv/march-fail-rv64i_zcf.l b/gas/testsuite/gas/riscv/march-fail-rv64i_zcf.l
new file mode 100644
index 0000000..b9e07c6
--- /dev/null
+++ b/gas/testsuite/gas/riscv/march-fail-rv64i_zcf.l
@@ -0,0 +1,2 @@
+.*Assembler messages:
+.*Error: .*rv64 does not support the `zcf' extension
-- 
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