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RISC-V: Zv*: Add support for Zvkb ISA extension

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Back then when the support for the RISC-V vector crypto extensions
was merged, the specification was frozen, but not ratified.
A frozen specification is allowed to change within tight bounds
before ratification and this has happend with the vector crypto
extensions.

The following changes were applied:
* A new extension Zvkb was defined, which is a strict subset of Zvbb.
* Zvkn and Zvks include now Zvkb instead of Zvbb.

This patch implements these changes between the frozen and the
ratified specification.

Note, that this technically an incompatible change of Zvkn and Zvks,
but I am not aware of any project that depends on the currently
implemented behaviour of Zvkn and Zvks. So this patch should be fine.

Reported-By: Jerry Shih <jerry.shih@sifive.com>
Reported-By: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu>
This commit is contained in:
Christoph Müllner
2023-11-23 01:04:47 +01:00
parent 3281156164
commit ea1bd00742
10 changed files with 69 additions and 72 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/opcode/riscv-opc.h
View File

@@ -2121,7 +2121,7 @@
#define MASK_VDOTUVV 0xfc00707f
#define MATCH_VFDOTVV 0xe4001057
#define MASK_VFDOTVV 0xfc00707f
/* Zvbb instructions. */
/* Zvbb/Zvkb instructions. */
#define MATCH_VANDN_VV 0x4000057
#define MASK_VANDN_VV 0xfc00707f
#define MATCH_VANDN_VX 0x4004057
@@ -3798,7 +3798,7 @@ DECLARE_INSN(c_ntl_all, MATCH_C_NTL_ALL, MASK_C_NTL_ALL)
/* Zawrs instructions. */
DECLARE_INSN(wrs_nto, MATCH_WRS_NTO, MASK_WRS_NTO)
DECLARE_INSN(wrs_sto, MATCH_WRS_STO, MASK_WRS_STO)
/* Zvbb instructions. */
/* Zvbb/Zvkb instructions. */
DECLARE_INSN(vandn_vv, MATCH_VANDN_VV, MASK_VANDN_VV)
DECLARE_INSN(vandn_vx, MATCH_VANDN_VX, MASK_VANDN_VX)
DECLARE_INSN(vbrev8_v, MATCH_VBREV8_V, MASK_VBREV8_V)

1
include/opcode/riscv.h
View File

@@ -439,6 +439,7 @@ enum riscv_insn_class
INSN_CLASS_ZVEF,
INSN_CLASS_ZVBB,
INSN_CLASS_ZVBC,
INSN_CLASS_ZVKB,
INSN_CLASS_ZVKG,
INSN_CLASS_ZVKNED,
INSN_CLASS_ZVKNHA_OR_ZVKNHB,