* [binutils-gdb] RISC-V: Prohibit the 'Zcf' extension on RV64
@ 2023-07-24 23:43 Tsukasa OI
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From: Tsukasa OI @ 2023-07-24 23:43 UTC (permalink / raw)
To: bfd-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=766f6d170c56d1d7b03e81f64d069386d0a7c5dd
commit 766f6d170c56d1d7b03e81f64d069386d0a7c5dd
Author: Tsukasa OI <research_trasio@irq.a4lg.com>
Date: Mon Jul 24 05:01:12 2023 +0000
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.
Diff:
---
bfd/elfxx-riscv.c | 7 +++++++
gas/testsuite/gas/riscv/march-fail-rv64i_zcf.d | 3 +++
gas/testsuite/gas/riscv/march-fail-rv64i_zcf.l | 2 ++
3 files changed, 12 insertions(+)
diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c
index ee96608358e..eaf496649db 100644
--- a/bfd/elfxx-riscv.c
+++ b/bfd/elfxx-riscv.c
@@ -1946,6 +1946,13 @@ riscv_parse_check_conflicts (riscv_parse_subset_t *rps)
rps->error_handler (_("rv%d does not support the `q' extension"), xlen);
no_conflict = false;
}
+ if (riscv_lookup_subset (rps->subset_list, "zcf", &subset)
+ && xlen > 32)
+ {
+ rps->error_handler
+ (_("rv%d does not support the `zcf' extension"), xlen);
+ no_conflict = false;
+ }
if (riscv_lookup_subset (rps->subset_list, "zfinx", &subset)
&& riscv_lookup_subset (rps->subset_list, "f", &subset))
{
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 00000000000..1b70a9e280f
--- /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 00000000000..b9e07c64d52
--- /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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2023-07-24 23:43 [binutils-gdb] RISC-V: Prohibit the 'Zcf' extension on RV64 Tsukasa OI
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