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[Bug gas/25376] Setting FPU reset's MVE feature bits but FPU can't set M

From: cvs-commit at gcc dot gnu.org
Subject: [Bug gas/25376] Setting FPU reset's MVE feature bits but FPU can't set MVE feature bits
Date: Thu, 16 Jan 2020 14:41:36 +0000


--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The master branch has been updated by Andre Simoes Dias Vieira


commit 2da2eaf4ce299c84c5a1f1bc6f7944266cb36d6e
Author: Andre Vieira <address@hidden>
Date:   Thu Jan 16 13:50:52 2020 +0000

    [binutils][arm] PR25376 Change MVE into a CORE_HIGH feature

    This patch moves MVE feature bits into the CORE_HIGH section.  This makes
    .fpu and -mfpu does not reset the bits set by MVE. This is important
    .fpu has no option to "set" these same bits and thus, mimic'ing GCC, we
    to define MVE as an architecture extension rather than put it together with
    other the legacy fpu features.

    This will enable the following behavior:
    .arch armv8.1-m.main
    .arch mve
    .fpu fpv5-sp-d16               #does not disable mve.
    vadd.i32 q0, q1, q2

    This patch also makes sure MVE is not taken into account during
    This was already the case, but because we moved the MVE bits to the
    architecture feature space we must make sure ARM_ANY does not include MVE.

    2020-01-16  Andre Vieira  <address@hidden>

        PR 25376
        * config/tc-arm.c (mve_ext, mve_fp_ext): Use CORE_HIGH.
        (armv8_1m_main_ext_table): Use CORE_HIGH for mve.
        * testsuite/arm/armv8_1-m-fpu-mve-1.s: New.
        * testsuite/arm/armv8_1-m-fpu-mve-1.d: New.
        * testsuite/arm/armv8_1-m-fpu-mve-2.s: New.
        * testsuite/arm/armv8_1-m-fpu-mve-2.d: New.

    2020-01-16  Andre Vieira  <address@hidden>

        PR 25376
        * opcodes/arm.h (FPU_MVE, FPU_MVE_FPU): Move these features to...
        (ARM_EXT2_MVE, ARM_EXT2_MVE_FP): ... the CORE_HIGH space.
        (ARM_ANY): Redefine to not include any MVE bits.
        (ARM_FEATURE_ALL): Removed.

    2020-01-16  Andre Vieira  <address@hidden>

        PR 25376
        * opcodes/arm-dis.c (coprocessor_opcodes): Use CORE_HIGH for MVE bits.
        (neon_opcodes): Likewise.
        (select_arm_features): Make sure we enable MVE bits when selecting
        armv8.1-m.main.  Make sure we do not enable MVE bits when not selecting
        any architecture.

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