[PATCH][Arm][2/4] Custom Datapath Extension intrinsics: instructions using FPU/MVE S/D registers

[Dennis Zhang]

Hi all,

This patch is updated as attached.
It's rebased to the top. Is it ready for commit please?

Cheers
Dennis

> Hi all,
>
> This patch is part of a series that adds support for the ARMv8.m Custom Datapath Extension (CDE).
> It enables the ACLE intrinsics calling VCX1<A>, VCX2<A>, and VCX3<A> instructions who work with FPU/MVE 32-bit/64-bit registers.
>
> This patch depends on the CDE feature patch: https://gcc.gnu.org/pipermail/gcc-patches/2020-March/541921.html
> It also depends on the MVE framework patch: https://gcc.gnu.org/pipermail/gcc-patches/2020-February/540415.html
> ISA has been announced at https://developer.arm.com/architectures/instruction-sets/custom-instructions
>
> Regtested and bootstrapped for arm-none-linux-gnueabi-armv8-m.main.
>
> Is it OK for commit please?
>
> Cheers
> Dennis
>
> gcc/ChangeLog:
>
> 2020-03-12  Dennis Zhang  <dennis.zhang@arm.com>
>              Matthew Malcomson <matthew.malcomson@arm.com>
>
>         * config/arm/arm-builtins.c (CX_IMM_QUALIFIERS): New macro.
>         (CX_UNARY_QUALIFIERS, CX_BINARY_QUALIFIERS): Likewise.
>         (CX_TERNARY_QUALIFIERS): Likewise.
>         (ARM_BUILTIN_CDE_PATTERN_START): Likewise.
>         (ARM_BUILTIN_CDE_PATTERN_END): Likewise.
>         (arm_init_acle_builtins): Initialize CDE builtins.
>         (arm_expand_acle_builtin): Check CDE constant operands.
>         * config/arm/arm.h (ARM_CDE_CONST_COPROC): New macro to set the range
>         of CDE constant operand.
>         (ARM_VCDE_CONST_1, ARM_VCDE_CONST_2, ARM_VCDE_CONST_3): Likewise.
>         * config/arm/arm_cde.h (__arm_vcx1_u32): New macro of ACLE interface.
>         (__arm_vcx1a_u32, __arm_vcx2_u32, __arm_vcx2a_u32): Likewise.
>         (__arm_vcx3_u32, __arm_vcx3a_u32, __arm_vcx1d_u64): Likewise.
>         (__arm_vcx1da_u64, __arm_vcx2d_u64, __arm_vcx2da_u64): Likewise.
>         (__arm_vcx3d_u64, __arm_vcx3da_u64): Likewise.
>         * config/arm/arm_cde_builtins.def: New file.
>         * config/arm/iterators.md (V_reg): New attribute of SI.
>         * config/arm/predicates.md (const_int_coproc_operand): New.
>         (const_int_vcde1_operand, const_int_vcde2_operand): New.
>         (const_int_vcde3_operand): New.
>         * config/arm/unspecs.md (UNSPEC_VCDE, UNSPEC_VCDEA): New.
>         * config/arm/vfp.md (arm_vcx1<mode>): New entry.
>         (arm_vcx1a<mode>, arm_vcx2<mode>, arm_vcx2a<mode>): Likewise.
>         (arm_vcx3<mode>, arm_vcx3a<mode>): Likewise.
>
> gcc/testsuite/ChangeLog:
>
> 2020-03-12  Dennis Zhang  <dennis.zhang@arm.com>
>
>         * gcc.target/arm/acle/cde_v_1.c: New test.
>         * gcc.target/arm/acle/cde_v_1_err.c: New test.
>         * gcc.target/arm/acle/cde_v_1_mve.c: New test.
>
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