[PATCH v2 1/3] RISC-V: Fix vector CSR requirements and imply
Kito Cheng
kito.cheng@sifive.com
Wed Sep 7 09:34:07 GMT 2022
I am +1 on this change, *BUT* I would like to clarify that on ISA spec
first, maybe create an issue on riscv-v-spec?
On Wed, Sep 7, 2022 at 2:22 PM Tsukasa OI <research_trasio@irq.a4lg.com>
wrote:
> Vector CSRs are also required on smaller vector subsets. It caused
> assembler errors when only integer-only vector subextensions ('Zve32x'/
> 'Zve64x') are enabled. It also caused warnings when CSR checking is
> enabled on subsets with floating-point arithmetic
> ('Zve32f'/'Zve64f'/'Zve64d')
>
> Not only that the most of vector CSRs are general purpose (and must be
> accessible for every vector subsets), current minimum vector subset
> 'Zve32x'
> requires fixed point arithmetic, making remaining non-general purpose
> (fixed point arithmetic only) CSRs mandatory for such subsets.
>
> So, those CSRs must be accessible from 'Zve32x', not just from 'V'.
> This commit fixes this issue which caused CSR accessibility warnings.
>
> Also, 'Zve32x' does not imply 'Zicsr' so accessing vector CSRs with
> "-march=rv32i_zve32x" does not work ('Zve64x' does not work as well).
> This commit fixes this issue by implying 'Zicsr' from 'Zve32x' ('Zve64x'
> implies 'Zve32x' so adding an implication from 'Zve32x' is sufficient).
>
> bfd/ChangeLog:
>
> * elfxx-riscv.c (riscv_implicit_subsets): Make 'Zve32x' extension
> to imply 'Zicsr'.
>
> gas/ChangeLog:
>
> * config/tc-riscv.c (riscv_csr_address): Change vector CSR
> requirement from 'V' to 'Zve32x'.
> * testsuite/gas/riscv/csr-version-1p9p1.l: Change vector CSR
> requirement from 'V' to 'Zve32x'.
> * testsuite/gas/riscv/csr-version-1p10.l: Likewise.
> * testsuite/gas/riscv/csr-version-1p11.l: Likewise.
> * testsuite/gas/riscv/csr-version-1p12.l: Likewise.
> * testsuite/gas/riscv/vector-csrs.s: New test.
> * testsuite/gas/riscv/vector-csrs-zve32x.d: Likewise.
> * testsuite/gas/riscv/vector-csrs-zve32f.d: Likewise.
> * testsuite/gas/riscv/vector-csrs-zve64x.d: Likewise.
> * testsuite/gas/riscv/vector-csrs-zve64f.d: Likewise.
> * testsuite/gas/riscv/vector-csrs-zve64d.d: Likewise.
> ---
> bfd/elfxx-riscv.c | 1 +
> gas/config/tc-riscv.c | 2 +-
> gas/testsuite/gas/riscv/csr-version-1p10.l | 28 ++++++++++----------
> gas/testsuite/gas/riscv/csr-version-1p11.l | 28 ++++++++++----------
> gas/testsuite/gas/riscv/csr-version-1p12.l | 28 ++++++++++----------
> gas/testsuite/gas/riscv/csr-version-1p9p1.l | 28 ++++++++++----------
> gas/testsuite/gas/riscv/vector-csrs-zve32f.d | 21 +++++++++++++++
> gas/testsuite/gas/riscv/vector-csrs-zve32x.d | 21 +++++++++++++++
> gas/testsuite/gas/riscv/vector-csrs-zve64d.d | 21 +++++++++++++++
> gas/testsuite/gas/riscv/vector-csrs-zve64f.d | 21 +++++++++++++++
> gas/testsuite/gas/riscv/vector-csrs-zve64x.d | 21 +++++++++++++++
> gas/testsuite/gas/riscv/vector-csrs.s | 12 +++++++++
> 12 files changed, 175 insertions(+), 57 deletions(-)
> create mode 100644 gas/testsuite/gas/riscv/vector-csrs-zve32f.d
> create mode 100644 gas/testsuite/gas/riscv/vector-csrs-zve32x.d
> create mode 100644 gas/testsuite/gas/riscv/vector-csrs-zve64d.d
> create mode 100644 gas/testsuite/gas/riscv/vector-csrs-zve64f.d
> create mode 100644 gas/testsuite/gas/riscv/vector-csrs-zve64x.d
> create mode 100644 gas/testsuite/gas/riscv/vector-csrs.s
>
> diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c
> index 8cb3c8d4930..fb742dc9272 100644
> --- a/bfd/elfxx-riscv.c
> +++ b/bfd/elfxx-riscv.c
> @@ -1062,6 +1062,7 @@ static struct riscv_implicit_subset
> riscv_implicit_subsets[] =
> {"zve64x", "zve32x", check_implicit_always},
> {"zve64x", "zvl64b", check_implicit_always},
> {"zve32x", "zvl32b", check_implicit_always},
> + {"zve32x", "zicsr", check_implicit_always},
> {"zvl65536b", "zvl32768b", check_implicit_always},
> {"zvl32768b", "zvl16384b", check_implicit_always},
> {"zvl16384b", "zvl8192b", check_implicit_always},
> diff --git a/gas/config/tc-riscv.c b/gas/config/tc-riscv.c
> index 34ce68e8252..df2e201fb74 100644
> --- a/gas/config/tc-riscv.c
> +++ b/gas/config/tc-riscv.c
> @@ -935,7 +935,7 @@ riscv_csr_address (const char *csr_name,
> extension = "zkr";
> break;
> case CSR_CLASS_V:
> - extension = "v";
> + extension = "zve32x";
> break;
> case CSR_CLASS_SMSTATEEN:
> case CSR_CLASS_SMSTATEEN_AND_H:
> diff --git a/gas/testsuite/gas/riscv/csr-version-1p10.l
> b/gas/testsuite/gas/riscv/csr-version-1p10.l
> index b778453b556..999e9af1520 100644
> --- a/gas/testsuite/gas/riscv/csr-version-1p10.l
> +++ b/gas/testsuite/gas/riscv/csr-version-1p10.l
> @@ -652,20 +652,20 @@
> .*Warning: invalid CSR `fcsr', needs `f' extension
> .*Warning: invalid CSR `seed', needs `zkr' extension
> .*Warning: invalid CSR `seed', needs `zkr' extension
> -.*Warning: invalid CSR `vstart', needs `v' extension
> -.*Warning: invalid CSR `vstart', needs `v' extension
> -.*Warning: invalid CSR `vxsat', needs `v' extension
> -.*Warning: invalid CSR `vxsat', needs `v' extension
> -.*Warning: invalid CSR `vxrm', needs `v' extension
> -.*Warning: invalid CSR `vxrm', needs `v' extension
> -.*Warning: invalid CSR `vcsr', needs `v' extension
> -.*Warning: invalid CSR `vcsr', needs `v' extension
> -.*Warning: invalid CSR `vl', needs `v' extension
> -.*Warning: invalid CSR `vl', needs `v' extension
> +.*Warning: invalid CSR `vstart', needs `zve32x' extension
> +.*Warning: invalid CSR `vstart', needs `zve32x' extension
> +.*Warning: invalid CSR `vxsat', needs `zve32x' extension
> +.*Warning: invalid CSR `vxsat', needs `zve32x' extension
> +.*Warning: invalid CSR `vxrm', needs `zve32x' extension
> +.*Warning: invalid CSR `vxrm', needs `zve32x' extension
> +.*Warning: invalid CSR `vcsr', needs `zve32x' extension
> +.*Warning: invalid CSR `vcsr', needs `zve32x' extension
> +.*Warning: invalid CSR `vl', needs `zve32x' extension
> +.*Warning: invalid CSR `vl', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vl,a1'
> -.*Warning: invalid CSR `vtype', needs `v' extension
> -.*Warning: invalid CSR `vtype', needs `v' extension
> +.*Warning: invalid CSR `vtype', needs `zve32x' extension
> +.*Warning: invalid CSR `vtype', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vtype,a1'
> -.*Warning: invalid CSR `vlenb', needs `v' extension
> -.*Warning: invalid CSR `vlenb', needs `v' extension
> +.*Warning: invalid CSR `vlenb', needs `zve32x' extension
> +.*Warning: invalid CSR `vlenb', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vlenb,a1'
> diff --git a/gas/testsuite/gas/riscv/csr-version-1p11.l
> b/gas/testsuite/gas/riscv/csr-version-1p11.l
> index 78bae817470..a099e4ecc93 100644
> --- a/gas/testsuite/gas/riscv/csr-version-1p11.l
> +++ b/gas/testsuite/gas/riscv/csr-version-1p11.l
> @@ -650,20 +650,20 @@
> .*Warning: invalid CSR `fcsr', needs `f' extension
> .*Warning: invalid CSR `seed', needs `zkr' extension
> .*Warning: invalid CSR `seed', needs `zkr' extension
> -.*Warning: invalid CSR `vstart', needs `v' extension
> -.*Warning: invalid CSR `vstart', needs `v' extension
> -.*Warning: invalid CSR `vxsat', needs `v' extension
> -.*Warning: invalid CSR `vxsat', needs `v' extension
> -.*Warning: invalid CSR `vxrm', needs `v' extension
> -.*Warning: invalid CSR `vxrm', needs `v' extension
> -.*Warning: invalid CSR `vcsr', needs `v' extension
> -.*Warning: invalid CSR `vcsr', needs `v' extension
> -.*Warning: invalid CSR `vl', needs `v' extension
> -.*Warning: invalid CSR `vl', needs `v' extension
> +.*Warning: invalid CSR `vstart', needs `zve32x' extension
> +.*Warning: invalid CSR `vstart', needs `zve32x' extension
> +.*Warning: invalid CSR `vxsat', needs `zve32x' extension
> +.*Warning: invalid CSR `vxsat', needs `zve32x' extension
> +.*Warning: invalid CSR `vxrm', needs `zve32x' extension
> +.*Warning: invalid CSR `vxrm', needs `zve32x' extension
> +.*Warning: invalid CSR `vcsr', needs `zve32x' extension
> +.*Warning: invalid CSR `vcsr', needs `zve32x' extension
> +.*Warning: invalid CSR `vl', needs `zve32x' extension
> +.*Warning: invalid CSR `vl', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vl,a1'
> -.*Warning: invalid CSR `vtype', needs `v' extension
> -.*Warning: invalid CSR `vtype', needs `v' extension
> +.*Warning: invalid CSR `vtype', needs `zve32x' extension
> +.*Warning: invalid CSR `vtype', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vtype,a1'
> -.*Warning: invalid CSR `vlenb', needs `v' extension
> -.*Warning: invalid CSR `vlenb', needs `v' extension
> +.*Warning: invalid CSR `vlenb', needs `zve32x' extension
> +.*Warning: invalid CSR `vlenb', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vlenb,a1'
> diff --git a/gas/testsuite/gas/riscv/csr-version-1p12.l
> b/gas/testsuite/gas/riscv/csr-version-1p12.l
> index cb026bb55e0..cf8f2e25634 100644
> --- a/gas/testsuite/gas/riscv/csr-version-1p12.l
> +++ b/gas/testsuite/gas/riscv/csr-version-1p12.l
> @@ -532,20 +532,20 @@
> .*Warning: invalid CSR `fcsr', needs `f' extension
> .*Warning: invalid CSR `seed', needs `zkr' extension
> .*Warning: invalid CSR `seed', needs `zkr' extension
> -.*Warning: invalid CSR `vstart', needs `v' extension
> -.*Warning: invalid CSR `vstart', needs `v' extension
> -.*Warning: invalid CSR `vxsat', needs `v' extension
> -.*Warning: invalid CSR `vxsat', needs `v' extension
> -.*Warning: invalid CSR `vxrm', needs `v' extension
> -.*Warning: invalid CSR `vxrm', needs `v' extension
> -.*Warning: invalid CSR `vcsr', needs `v' extension
> -.*Warning: invalid CSR `vcsr', needs `v' extension
> -.*Warning: invalid CSR `vl', needs `v' extension
> -.*Warning: invalid CSR `vl', needs `v' extension
> +.*Warning: invalid CSR `vstart', needs `zve32x' extension
> +.*Warning: invalid CSR `vstart', needs `zve32x' extension
> +.*Warning: invalid CSR `vxsat', needs `zve32x' extension
> +.*Warning: invalid CSR `vxsat', needs `zve32x' extension
> +.*Warning: invalid CSR `vxrm', needs `zve32x' extension
> +.*Warning: invalid CSR `vxrm', needs `zve32x' extension
> +.*Warning: invalid CSR `vcsr', needs `zve32x' extension
> +.*Warning: invalid CSR `vcsr', needs `zve32x' extension
> +.*Warning: invalid CSR `vl', needs `zve32x' extension
> +.*Warning: invalid CSR `vl', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vl,a1'
> -.*Warning: invalid CSR `vtype', needs `v' extension
> -.*Warning: invalid CSR `vtype', needs `v' extension
> +.*Warning: invalid CSR `vtype', needs `zve32x' extension
> +.*Warning: invalid CSR `vtype', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vtype,a1'
> -.*Warning: invalid CSR `vlenb', needs `v' extension
> -.*Warning: invalid CSR `vlenb', needs `v' extension
> +.*Warning: invalid CSR `vlenb', needs `zve32x' extension
> +.*Warning: invalid CSR `vlenb', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vlenb,a1'
> diff --git a/gas/testsuite/gas/riscv/csr-version-1p9p1.l
> b/gas/testsuite/gas/riscv/csr-version-1p9p1.l
> index 4fac40fb589..5f298c1dda9 100644
> --- a/gas/testsuite/gas/riscv/csr-version-1p9p1.l
> +++ b/gas/testsuite/gas/riscv/csr-version-1p9p1.l
> @@ -678,20 +678,20 @@
> .*Warning: invalid CSR `fcsr', needs `f' extension
> .*Warning: invalid CSR `seed', needs `zkr' extension
> .*Warning: invalid CSR `seed', needs `zkr' extension
> -.*Warning: invalid CSR `vstart', needs `v' extension
> -.*Warning: invalid CSR `vstart', needs `v' extension
> -.*Warning: invalid CSR `vxsat', needs `v' extension
> -.*Warning: invalid CSR `vxsat', needs `v' extension
> -.*Warning: invalid CSR `vxrm', needs `v' extension
> -.*Warning: invalid CSR `vxrm', needs `v' extension
> -.*Warning: invalid CSR `vcsr', needs `v' extension
> -.*Warning: invalid CSR `vcsr', needs `v' extension
> -.*Warning: invalid CSR `vl', needs `v' extension
> -.*Warning: invalid CSR `vl', needs `v' extension
> +.*Warning: invalid CSR `vstart', needs `zve32x' extension
> +.*Warning: invalid CSR `vstart', needs `zve32x' extension
> +.*Warning: invalid CSR `vxsat', needs `zve32x' extension
> +.*Warning: invalid CSR `vxsat', needs `zve32x' extension
> +.*Warning: invalid CSR `vxrm', needs `zve32x' extension
> +.*Warning: invalid CSR `vxrm', needs `zve32x' extension
> +.*Warning: invalid CSR `vcsr', needs `zve32x' extension
> +.*Warning: invalid CSR `vcsr', needs `zve32x' extension
> +.*Warning: invalid CSR `vl', needs `zve32x' extension
> +.*Warning: invalid CSR `vl', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vl,a1'
> -.*Warning: invalid CSR `vtype', needs `v' extension
> -.*Warning: invalid CSR `vtype', needs `v' extension
> +.*Warning: invalid CSR `vtype', needs `zve32x' extension
> +.*Warning: invalid CSR `vtype', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vtype,a1'
> -.*Warning: invalid CSR `vlenb', needs `v' extension
> -.*Warning: invalid CSR `vlenb', needs `v' extension
> +.*Warning: invalid CSR `vlenb', needs `zve32x' extension
> +.*Warning: invalid CSR `vlenb', needs `zve32x' extension
> .*Warning: read-only CSR is written `csrw vlenb,a1'
> diff --git a/gas/testsuite/gas/riscv/vector-csrs-zve32f.d
> b/gas/testsuite/gas/riscv/vector-csrs-zve32f.d
> new file mode 100644
> index 00000000000..9613915713b
> --- /dev/null
> +++ b/gas/testsuite/gas/riscv/vector-csrs-zve32f.d
> @@ -0,0 +1,21 @@
> +#as: -march=rv32i_zve32f -mcsr-check
> +#source: vector-csrs.s
> +#objdump: -d
> +
> +.*:[ ]+file format .*
> +
> +
> +Disassembly of section .text:
> +
> +0+000 <target>:
> +[ ]+[0-9a-f]+:[ ]+00802573[ ]+csrr[ ]+a0,vstart
> +[ ]+[0-9a-f]+:[ ]+00801073[ ]+csrw[ ]+vstart,zero
> +[ ]+[0-9a-f]+:[ ]+00902573[ ]+csrr[ ]+a0,vxsat
> +[ ]+[0-9a-f]+:[ ]+0090d073[ ]+csrwi[ ]+vxsat,1
> +[ ]+[0-9a-f]+:[ ]+00a02573[ ]+csrr[ ]+a0,vxrm
> +[ ]+[0-9a-f]+:[ ]+00a1d073[ ]+csrwi[ ]+vxrm,3
> +[ ]+[0-9a-f]+:[ ]+00f02573[ ]+csrr[ ]+a0,vcsr
> +[ ]+[0-9a-f]+:[ ]+00f3d073[ ]+csrwi[ ]+vcsr,7
> +[ ]+[0-9a-f]+:[ ]+c2002573[ ]+csrr[ ]+a0,vl
> +[ ]+[0-9a-f]+:[ ]+c2102573[ ]+csrr[ ]+a0,vtype
> +[ ]+[0-9a-f]+:[ ]+c2202573[ ]+csrr[ ]+a0,vlenb
> diff --git a/gas/testsuite/gas/riscv/vector-csrs-zve32x.d
> b/gas/testsuite/gas/riscv/vector-csrs-zve32x.d
> new file mode 100644
> index 00000000000..a608efbfb0b
> --- /dev/null
> +++ b/gas/testsuite/gas/riscv/vector-csrs-zve32x.d
> @@ -0,0 +1,21 @@
> +#as: -march=rv32i_zve32x -mcsr-check
> +#source: vector-csrs.s
> +#objdump: -d
> +
> +.*:[ ]+file format .*
> +
> +
> +Disassembly of section .text:
> +
> +0+000 <target>:
> +[ ]+[0-9a-f]+:[ ]+00802573[ ]+csrr[ ]+a0,vstart
> +[ ]+[0-9a-f]+:[ ]+00801073[ ]+csrw[ ]+vstart,zero
> +[ ]+[0-9a-f]+:[ ]+00902573[ ]+csrr[ ]+a0,vxsat
> +[ ]+[0-9a-f]+:[ ]+0090d073[ ]+csrwi[ ]+vxsat,1
> +[ ]+[0-9a-f]+:[ ]+00a02573[ ]+csrr[ ]+a0,vxrm
> +[ ]+[0-9a-f]+:[ ]+00a1d073[ ]+csrwi[ ]+vxrm,3
> +[ ]+[0-9a-f]+:[ ]+00f02573[ ]+csrr[ ]+a0,vcsr
> +[ ]+[0-9a-f]+:[ ]+00f3d073[ ]+csrwi[ ]+vcsr,7
> +[ ]+[0-9a-f]+:[ ]+c2002573[ ]+csrr[ ]+a0,vl
> +[ ]+[0-9a-f]+:[ ]+c2102573[ ]+csrr[ ]+a0,vtype
> +[ ]+[0-9a-f]+:[ ]+c2202573[ ]+csrr[ ]+a0,vlenb
> diff --git a/gas/testsuite/gas/riscv/vector-csrs-zve64d.d
> b/gas/testsuite/gas/riscv/vector-csrs-zve64d.d
> new file mode 100644
> index 00000000000..f42e670699a
> --- /dev/null
> +++ b/gas/testsuite/gas/riscv/vector-csrs-zve64d.d
> @@ -0,0 +1,21 @@
> +#as: -march=rv32i_zve64d -mcsr-check
> +#source: vector-csrs.s
> +#objdump: -d
> +
> +.*:[ ]+file format .*
> +
> +
> +Disassembly of section .text:
> +
> +0+000 <target>:
> +[ ]+[0-9a-f]+:[ ]+00802573[ ]+csrr[ ]+a0,vstart
> +[ ]+[0-9a-f]+:[ ]+00801073[ ]+csrw[ ]+vstart,zero
> +[ ]+[0-9a-f]+:[ ]+00902573[ ]+csrr[ ]+a0,vxsat
> +[ ]+[0-9a-f]+:[ ]+0090d073[ ]+csrwi[ ]+vxsat,1
> +[ ]+[0-9a-f]+:[ ]+00a02573[ ]+csrr[ ]+a0,vxrm
> +[ ]+[0-9a-f]+:[ ]+00a1d073[ ]+csrwi[ ]+vxrm,3
> +[ ]+[0-9a-f]+:[ ]+00f02573[ ]+csrr[ ]+a0,vcsr
> +[ ]+[0-9a-f]+:[ ]+00f3d073[ ]+csrwi[ ]+vcsr,7
> +[ ]+[0-9a-f]+:[ ]+c2002573[ ]+csrr[ ]+a0,vl
> +[ ]+[0-9a-f]+:[ ]+c2102573[ ]+csrr[ ]+a0,vtype
> +[ ]+[0-9a-f]+:[ ]+c2202573[ ]+csrr[ ]+a0,vlenb
> diff --git a/gas/testsuite/gas/riscv/vector-csrs-zve64f.d
> b/gas/testsuite/gas/riscv/vector-csrs-zve64f.d
> new file mode 100644
> index 00000000000..e88b5a3ff6e
> --- /dev/null
> +++ b/gas/testsuite/gas/riscv/vector-csrs-zve64f.d
> @@ -0,0 +1,21 @@
> +#as: -march=rv32i_zve64f -mcsr-check
> +#source: vector-csrs.s
> +#objdump: -d
> +
> +.*:[ ]+file format .*
> +
> +
> +Disassembly of section .text:
> +
> +0+000 <target>:
> +[ ]+[0-9a-f]+:[ ]+00802573[ ]+csrr[ ]+a0,vstart
> +[ ]+[0-9a-f]+:[ ]+00801073[ ]+csrw[ ]+vstart,zero
> +[ ]+[0-9a-f]+:[ ]+00902573[ ]+csrr[ ]+a0,vxsat
> +[ ]+[0-9a-f]+:[ ]+0090d073[ ]+csrwi[ ]+vxsat,1
> +[ ]+[0-9a-f]+:[ ]+00a02573[ ]+csrr[ ]+a0,vxrm
> +[ ]+[0-9a-f]+:[ ]+00a1d073[ ]+csrwi[ ]+vxrm,3
> +[ ]+[0-9a-f]+:[ ]+00f02573[ ]+csrr[ ]+a0,vcsr
> +[ ]+[0-9a-f]+:[ ]+00f3d073[ ]+csrwi[ ]+vcsr,7
> +[ ]+[0-9a-f]+:[ ]+c2002573[ ]+csrr[ ]+a0,vl
> +[ ]+[0-9a-f]+:[ ]+c2102573[ ]+csrr[ ]+a0,vtype
> +[ ]+[0-9a-f]+:[ ]+c2202573[ ]+csrr[ ]+a0,vlenb
> diff --git a/gas/testsuite/gas/riscv/vector-csrs-zve64x.d
> b/gas/testsuite/gas/riscv/vector-csrs-zve64x.d
> new file mode 100644
> index 00000000000..83aa1bba341
> --- /dev/null
> +++ b/gas/testsuite/gas/riscv/vector-csrs-zve64x.d
> @@ -0,0 +1,21 @@
> +#as: -march=rv32i_zve64x -mcsr-check
> +#source: vector-csrs.s
> +#objdump: -d
> +
> +.*:[ ]+file format .*
> +
> +
> +Disassembly of section .text:
> +
> +0+000 <target>:
> +[ ]+[0-9a-f]+:[ ]+00802573[ ]+csrr[ ]+a0,vstart
> +[ ]+[0-9a-f]+:[ ]+00801073[ ]+csrw[ ]+vstart,zero
> +[ ]+[0-9a-f]+:[ ]+00902573[ ]+csrr[ ]+a0,vxsat
> +[ ]+[0-9a-f]+:[ ]+0090d073[ ]+csrwi[ ]+vxsat,1
> +[ ]+[0-9a-f]+:[ ]+00a02573[ ]+csrr[ ]+a0,vxrm
> +[ ]+[0-9a-f]+:[ ]+00a1d073[ ]+csrwi[ ]+vxrm,3
> +[ ]+[0-9a-f]+:[ ]+00f02573[ ]+csrr[ ]+a0,vcsr
> +[ ]+[0-9a-f]+:[ ]+00f3d073[ ]+csrwi[ ]+vcsr,7
> +[ ]+[0-9a-f]+:[ ]+c2002573[ ]+csrr[ ]+a0,vl
> +[ ]+[0-9a-f]+:[ ]+c2102573[ ]+csrr[ ]+a0,vtype
> +[ ]+[0-9a-f]+:[ ]+c2202573[ ]+csrr[ ]+a0,vlenb
> diff --git a/gas/testsuite/gas/riscv/vector-csrs.s
> b/gas/testsuite/gas/riscv/vector-csrs.s
> new file mode 100644
> index 00000000000..7019a0588ef
> --- /dev/null
> +++ b/gas/testsuite/gas/riscv/vector-csrs.s
> @@ -0,0 +1,12 @@
> +target:
> + csrr a0, vstart
> + csrw vstart, zero
> + csrr a0, vxsat
> + csrwi vxsat, 1
> + csrr a0, vxrm
> + csrwi vxrm, 3
> + csrr a0, vcsr
> + csrwi vcsr, 7
> + csrr a0, vl
> + csrr a0, vtype
> + csrr a0, vlenb
> --
> 2.34.1
>
>
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