* [binutils-gdb] RISC-V: Add CSRs for T-Head VECTOR vendor extension
@ 2023-11-23 2:08 Nelson Chu
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From: Nelson Chu @ 2023-11-23 2:08 UTC (permalink / raw)
To: bfd-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6fdd02bb1f5bbeaa4d38b8a39e26ba414a850001
commit 6fdd02bb1f5bbeaa4d38b8a39e26ba414a850001
Author: Jin Ma <jinma@linux.alibaba.com>
Date: Sat Nov 18 14:58:25 2023 +0800
RISC-V: Add CSRs for T-Head VECTOR vendor extension
T-Head has a range of vendor-specific instructions.
Therefore it makes sense to group them into smaller chunks
in form of vendor extensions.
This patch adds the CSRs for XTheadVector. Because of the
conflict between encoding and teh 'V' extension, it is implemented
by alias. The 'th' prefix and the "XTheadVector" extension are
documented in a PR for the RISC-V toolchain conventions ([1]).
[1] https://github.com/riscv-non-isa/riscv-toolchain-conventions/pull/19
Co-developed-by: Lifang Xia <lifang_xia@linux.alibaba.com>
Co-developed-by: Christoph Müllner <christoph.muellner@vrull.eu>
gas/ChangeLog:
* config/tc-riscv.c (enum riscv_csr_class): Add the class for
the CSRs of the "XTheadVector" extension.
(riscv_csr_address): Likewise.
* testsuite/gas/riscv/x-thead-vector-csr-warn.d: New test.
* testsuite/gas/riscv/x-thead-vector-csr-warn.l: New test.
* testsuite/gas/riscv/x-thead-vector-csr.d: New test.
* testsuite/gas/riscv/x-thead-vector-csr.s: New test.
include/ChangeLog:
* opcode/riscv-opc.h (DECLARE_CSR_ALIAS): Likewise.
opcodes/ChangeLog:
* riscv-dis.c (print_insn_args): Prefix the CSRs disassembly with 'th'.
Diff:
---
gas/config/tc-riscv.c | 4 ++++
gas/testsuite/gas/riscv/x-thead-vector-csr-warn.d | 3 +++
gas/testsuite/gas/riscv/x-thead-vector-csr-warn.l | 16 ++++++++++++++++
gas/testsuite/gas/riscv/x-thead-vector-csr.d | 21 +++++++++++++++++++++
gas/testsuite/gas/riscv/x-thead-vector-csr.s | 13 +++++++++++++
include/opcode/riscv-opc.h | 7 +++++++
opcodes/riscv-dis.c | 14 ++++++++++++--
7 files changed, 76 insertions(+), 2 deletions(-)
diff --git a/gas/config/tc-riscv.c b/gas/config/tc-riscv.c
index 402c46ad753..af9a34a2185 100644
--- a/gas/config/tc-riscv.c
+++ b/gas/config/tc-riscv.c
@@ -91,6 +91,7 @@ enum riscv_csr_class
CSR_CLASS_SSTC_AND_H, /* Sstc only (with H) */
CSR_CLASS_SSTC_32, /* Sstc RV32 only */
CSR_CLASS_SSTC_AND_H_32, /* Sstc RV32 only (with H) */
+ CSR_CLASS_XTHEADVECTOR, /* xtheadvector only */
};
/* This structure holds all restricted conditions for a CSR. */
@@ -1104,6 +1105,9 @@ riscv_csr_address (const char *csr_name,
break;
case CSR_CLASS_DEBUG:
break;
+ case CSR_CLASS_XTHEADVECTOR:
+ extension = "xtheadvector";
+ break;
default:
as_bad (_("internal: bad RISC-V CSR class (0x%x)"), csr_class);
}
diff --git a/gas/testsuite/gas/riscv/x-thead-vector-csr-warn.d b/gas/testsuite/gas/riscv/x-thead-vector-csr-warn.d
new file mode 100644
index 00000000000..17c707ddc7e
--- /dev/null
+++ b/gas/testsuite/gas/riscv/x-thead-vector-csr-warn.d
@@ -0,0 +1,3 @@
+#as: -march=rv64gc -mcsr-check
+#source: x-thead-vector-csr.s
+#warning_output: x-thead-vector-csr-warn.l
diff --git a/gas/testsuite/gas/riscv/x-thead-vector-csr-warn.l b/gas/testsuite/gas/riscv/x-thead-vector-csr-warn.l
new file mode 100644
index 00000000000..4dd867ce2ee
--- /dev/null
+++ b/gas/testsuite/gas/riscv/x-thead-vector-csr-warn.l
@@ -0,0 +1,16 @@
+.*Assembler messages:
+.*Warning: invalid CSR `th.vstart', needs `xtheadvector' extension
+.*Warning: invalid CSR `th.vxsat', needs `xtheadvector' extension
+.*Warning: invalid CSR `th.vxrm', needs `xtheadvector' extension
+.*Warning: invalid CSR `th.vl', needs `xtheadvector' extension
+.*Warning: invalid CSR `th.vtype', needs `xtheadvector' extension
+.*Warning: invalid CSR `th.vlenb', needs `xtheadvector' extension
+.*Warning: invalid CSR `th.vstart', needs `xtheadvector' extension
+.*Warning: invalid CSR `th.vxsat', needs `xtheadvector' extension
+.*Warning: invalid CSR `th.vxrm', needs `xtheadvector' extension
+.*Warning: invalid CSR `th.vl', needs `xtheadvector' extension
+.*Warning: read-only CSR is written `csrw th.vl,a0'
+.*Warning: invalid CSR `th.vtype', needs `xtheadvector' extension
+.*Warning: read-only CSR is written `csrw th.vtype,a0'
+.*Warning: invalid CSR `th.vlenb', needs `xtheadvector' extension
+.*Warning: read-only CSR is written `csrw th.vlenb,a0'
\ No newline at end of file
diff --git a/gas/testsuite/gas/riscv/x-thead-vector-csr.d b/gas/testsuite/gas/riscv/x-thead-vector-csr.d
new file mode 100644
index 00000000000..75357b204cc
--- /dev/null
+++ b/gas/testsuite/gas/riscv/x-thead-vector-csr.d
@@ -0,0 +1,21 @@
+#as: -march=rv32if_xtheadvector
+#objdump: -dr
+
+.*:[ ]+file format .*
+
+
+Disassembly of section .text:
+
+0+000 <.text>:
+[ ]+[0-9a-f]+:[ ]+00802573[ ]+csrr[ ]+a0,th.vstart
+[ ]+[0-9a-f]+:[ ]+00902573[ ]+csrr[ ]+a0,th.vxsat
+[ ]+[0-9a-f]+:[ ]+00a02573[ ]+csrr[ ]+a0,th.vxrm
+[ ]+[0-9a-f]+:[ ]+c2002573[ ]+csrr[ ]+a0,th.vl
+[ ]+[0-9a-f]+:[ ]+c2102573[ ]+csrr[ ]+a0,th.vtype
+[ ]+[0-9a-f]+:[ ]+c2202573[ ]+csrr[ ]+a0,th.vlenb
+[ ]+[0-9a-f]+:[ ]+00851073[ ]+csrw[ ]+th.vstart,a0
+[ ]+[0-9a-f]+:[ ]+00951073[ ]+csrw[ ]+th.vxsat,a0
+[ ]+[0-9a-f]+:[ ]+00a51073[ ]+csrw[ ]+th.vxrm,a0
+[ ]+[0-9a-f]+:[ ]+c2051073[ ]+csrw[ ]+th.vl,a0
+[ ]+[0-9a-f]+:[ ]+c2151073[ ]+csrw[ ]+th.vtype,a0
+[ ]+[0-9a-f]+:[ ]+c2251073[ ]+csrw[ ]+th.vlenb,a0
diff --git a/gas/testsuite/gas/riscv/x-thead-vector-csr.s b/gas/testsuite/gas/riscv/x-thead-vector-csr.s
new file mode 100644
index 00000000000..e11f87f1a07
--- /dev/null
+++ b/gas/testsuite/gas/riscv/x-thead-vector-csr.s
@@ -0,0 +1,13 @@
+ csrr a0, th.vstart
+ csrr a0, th.vxsat
+ csrr a0, th.vxrm
+ csrr a0, th.vl
+ csrr a0, th.vtype
+ csrr a0, th.vlenb
+
+ csrw th.vstart, a0
+ csrw th.vxsat, a0
+ csrw th.vxrm, a0
+ csrw th.vl, a0 # read-only CSR
+ csrw th.vtype, a0 # read-only CSR
+ csrw th.vlenb, a0 # read-only CSR
diff --git a/include/opcode/riscv-opc.h b/include/opcode/riscv-opc.h
index 24217062edc..ed29384e825 100644
--- a/include/opcode/riscv-opc.h
+++ b/include/opcode/riscv-opc.h
@@ -4121,4 +4121,11 @@ DECLARE_CSR_ALIAS(etrigger, CSR_TDATA1, CSR_CLASS_DEBUG, PRIV_SPEC_CLASS_NONE, P
DECLARE_CSR_ALIAS(tmexttrigger, CSR_TDATA1, CSR_CLASS_DEBUG, PRIV_SPEC_CLASS_NONE, PRIV_SPEC_CLASS_NONE)
DECLARE_CSR_ALIAS(textra32, CSR_TDATA3, CSR_CLASS_DEBUG, PRIV_SPEC_CLASS_NONE, PRIV_SPEC_CLASS_NONE)
DECLARE_CSR_ALIAS(textra64, CSR_TDATA3, CSR_CLASS_DEBUG, PRIV_SPEC_CLASS_NONE, PRIV_SPEC_CLASS_NONE)
+/* Unprivileged T-Head Vector CSRs. */
+DECLARE_CSR_ALIAS(th.vstart, CSR_VSTART, CSR_CLASS_XTHEADVECTOR, PRIV_SPEC_CLASS_NONE, PRIV_SPEC_CLASS_NONE)
+DECLARE_CSR_ALIAS(th.vxsat, CSR_VXSAT, CSR_CLASS_XTHEADVECTOR, PRIV_SPEC_CLASS_NONE, PRIV_SPEC_CLASS_NONE)
+DECLARE_CSR_ALIAS(th.vxrm, CSR_VXRM, CSR_CLASS_XTHEADVECTOR, PRIV_SPEC_CLASS_NONE, PRIV_SPEC_CLASS_NONE)
+DECLARE_CSR_ALIAS(th.vl, CSR_VL, CSR_CLASS_XTHEADVECTOR, PRIV_SPEC_CLASS_NONE, PRIV_SPEC_CLASS_NONE)
+DECLARE_CSR_ALIAS(th.vtype, CSR_VTYPE, CSR_CLASS_XTHEADVECTOR, PRIV_SPEC_CLASS_NONE, PRIV_SPEC_CLASS_NONE)
+DECLARE_CSR_ALIAS(th.vlenb, CSR_VLENB, CSR_CLASS_XTHEADVECTOR, PRIV_SPEC_CLASS_NONE, PRIV_SPEC_CLASS_NONE)
#endif /* DECLARE_CSR_ALIAS */
diff --git a/opcodes/riscv-dis.c b/opcodes/riscv-dis.c
index ca328b4c997..2d7c154cc3d 100644
--- a/opcodes/riscv-dis.c
+++ b/opcodes/riscv-dis.c
@@ -568,8 +568,18 @@ print_insn_args (const char *oparg, insn_t l, bfd_vma pc, disassemble_info *info
}
if (riscv_csr_hash[csr] != NULL)
- print (info->stream, dis_style_register, "%s",
- riscv_csr_hash[csr]);
+ if (riscv_subset_supports (&riscv_rps_dis, "xtheadvector")
+ && (csr == CSR_VSTART
+ || csr == CSR_VXSAT
+ || csr == CSR_VXRM
+ || csr == CSR_VL
+ || csr == CSR_VTYPE
+ || csr == CSR_VLENB))
+ print (info->stream, dis_style_register, "%s",
+ concat ("th.", riscv_csr_hash[csr], NULL));
+ else
+ print (info->stream, dis_style_register, "%s",
+ riscv_csr_hash[csr]);
else
print (info->stream, dis_style_immediate, "0x%x", csr);
break;
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