Re: [PATCH v3 04/15] target/riscv: Remove the W-form instructions from Z

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Re: [PATCH v3 04/15] target/riscv: Remove the W-form instructions from Z

From:	Richard Henderson
Subject:	Re: [PATCH v3 04/15] target/riscv: Remove the W-form instructions from Zbs
Date:	Mon, 23 Aug 2021 10:04:16 -0700
User-agent:	Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0

On 8/23/21 9:40 AM, Philipp Tomsich wrote:

Zbs 1.0.0 (just as the 0.93 draft-B before) does no provide for W-form
instructions for Zbs (single-bit instructions).  Remove them.

Note that these instructions had already been removed for the 0.93
version of the draft-B extenstion and have not been present in the
binutils patches circulating in January 2021.

Signed-off-by: Philipp Tomsich<philipp.tomsich@vrull.eu>
---

Changes in v3:
- Remove the W-form instructions from Zbs in a separate commit.

  target/riscv/insn32.decode              |  7 ----
  target/riscv/insn_trans/trans_rvb.c.inc | 49 -------------------------
  2 files changed, 56 deletions(-)


Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~

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[PATCH v3 00/15] target/riscv: Update QEmu for Zb[abcs] 1.0.0, Philipp Tomsich, 2021/08/23
- [PATCH v3 02/15] target/riscv: Reassign instructions to the Zba-extension, Philipp Tomsich, 2021/08/23
  - Re: [PATCH v3 02/15] target/riscv: Reassign instructions to the Zba-extension, Richard Henderson, 2021/08/23
- [PATCH v3 03/15] target/riscv: slli.uw is only a valid encoding if shamt first in 64 bits, Philipp Tomsich, 2021/08/23
  - Re: [PATCH v3 03/15] target/riscv: slli.uw is only a valid encoding if shamt first in 64 bits, Richard Henderson, 2021/08/23
- [PATCH v3 04/15] target/riscv: Remove the W-form instructions from Zbs, Philipp Tomsich, 2021/08/23
  - Re: [PATCH v3 04/15] target/riscv: Remove the W-form instructions from Zbs, Richard Henderson <=
- [PATCH v3 05/15] target/riscv: Remove shift-one instructions (proposed Zbo in pre-0.93 draft-B), Philipp Tomsich, 2021/08/23
  - Re: [PATCH v3 05/15] target/riscv: Remove shift-one instructions (proposed Zbo in pre-0.93 draft-B), Richard Henderson, 2021/08/23
- [PATCH v3 01/15] target/riscv: Add x-zba, x-zbb, x-zbc and x-zbs properties, Philipp Tomsich, 2021/08/23
  - Re: [PATCH v3 01/15] target/riscv: Add x-zba, x-zbb, x-zbc and x-zbs properties, Richard Henderson, 2021/08/23
- [PATCH v3 06/15] target/riscv: Reassign instructions to the Zbs-extension, Philipp Tomsich, 2021/08/23
  - Re: [PATCH v3 06/15] target/riscv: Reassign instructions to the Zbs-extension, Richard Henderson, 2021/08/23
- [PATCH v3 10/15] target/riscv: Add a REQUIRE_32BIT macro, Philipp Tomsich, 2021/08/23
  - Re: [PATCH v3 10/15] target/riscv: Add a REQUIRE_32BIT macro, Richard Henderson, 2021/08/23
- [PATCH v3 12/15] target/riscv: Add zext.h instructions to Zbb, removing pack/packu/packh, Philipp Tomsich, 2021/08/23
  - Re: [PATCH v3 12/15] target/riscv: Add zext.h instructions to Zbb, removing pack/packu/packh, Richard Henderson, 2021/08/23

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