[Arm] Implement CDE intrinsics for MVE registers. Implement CDE intrinsics on MVE registers.
Other than the basics required for adding intrinsics this patch consists of three changes. ** We separate out the MVE types and casts from the arm_mve.h header. This is so that the types can be used in arm_cde.h without the need to include the entire arm_mve.h header. The only type that arm_cde.h needs is `uint8x16_t`, so this separation could be avoided by using a `typedef` in this file. Since the introduced intrinsics are all defined to act on the full range of MVE types, declaring all such types seems intuitive since it will provide their declaration to the user too. This arm_mve_types.h header not only includes the MVE types, but also the conversion intrinsics between them. Some of the conversion intrinsics are needed for arm_cde.h, but most are not. We include all conversion intrinsics to keep the definition of such conversion functions all in one place, on the understanding that extra conversion functions being defined when including `arm_cde.h` is not a problem. ** We define the TARGET_RESOLVE_OVERLOADED_BUILTIN hook for the Arm backend. This is needed to implement the polymorphism for the required intrinsics. The intrinsics have no specialised version, and the resulting assembly instruction for all different types should be exactly the same. Due to this we have implemented these intrinsics via one builtin on one type. All other calls to the intrinsic with different types are implicitly cast to the one type that is defined, and hence are all expanded to the same RTL pattern that is only defined for one machine mode. ** We seperate the initialisation of the CDE intrinsics from others. This allows us to ensure that the CDE intrinsics acting on MVE registers are only created when both CDE and MVE are available. Only initialising these builtins when both features are available is especially important since they require a type that is only initialised when the target supports hard float. Hence trying to initialise these builtins on a soft float target would cause an ICE. Testing done: Full bootstrap and regtest on arm-none-linux-gnueabihf Regression test on arm-none-eabi NOTE: These tests ICE on arm-none-eabi. This is due to bugzilla bug 94341, and not due to a problem in this patch. NOTE2: This patch depends on the CDE intrinsic framework patch by Dennis. https://gcc.gnu.org/pipermail/gcc-patches/2020-March/542008.html Ok for trunk? gcc/ChangeLog: 2020-03-26 Matthew Malcomson <matthew.malcom...@arm.com> * config.gcc (arm_mve_types.h): New extra_header for arm. * config/arm/arm-builtins.c (arm_resolve_overloaded_builtin): New. (arm_init_cde_builtins): New. (arm_init_acle_builtins): Remove initialisation of CDE builtins. (arm_init_builtins): Call arm_init_cde_builtins when target supports CDE. * config/arm/arm-c.c (arm_resolve_overloaded_builtin): New declaration. (arm_register_target_pragmas): Initialise resolve_overloaded_builtin hook to the implementation for the arm backend. * config/arm/arm.h (ARM_MVE_CDE_CONST_1): New. (ARM_MVE_CDE_CONST_2): New. (ARM_MVE_CDE_CONST_3): New. * config/arm/arm_cde.h (__arm_vcx1q_u8): New. (__arm_vcx1qa): New. (__arm_vcx2q): New. (__arm_vcx2q_u8): New. (__arm_vcx2qa): New. (__arm_vcx3q): New. (__arm_vcx3q_u8): New. (__arm_vcx3qa): New. * config/arm/arm_cde_builtins.def (vcx1q, vcx1qa, vcx2q, vcx2qa, vcx3q, vcx3qa): New builtins defined. * config/arm/arm_mve.h: Move typedefs and conversion intrinsics to arm_mve_types.h header. * config/arm/arm_mve_types.h: New file. * config/arm/mve.md (arm_vcx1qv16qi, arm_vcx1qav16qi, arm_vcx2qv16qi, arm_vcx2qav16qi, arm_vcx3qv16qi, arm_vcx3qav16qi): New patterns. * config/arm/predicates.md (const_int_mve_cde1_operand, const_int_mve_cde2_operand, const_int_mve_cde3_operand): New. gcc/testsuite/ChangeLog: 2020-03-26 Matthew Malcomson <matthew.malcom...@arm.com> Dennis Zhang <dennis.zh...@arm.com> * gcc.target/arm/acle/cde-mve-error-1.c: New test. * gcc.target/arm/acle/cde-mve-error-2.c: New test. * gcc.target/arm/acle/cde-mve-error-3.c: New test. * gcc.target/arm/acle/cde-mve-full-assembly.c: New test. * gcc.target/arm/acle/cde-mve-tests.c: New test. * lib/target-supports.exp (arm_v8_1m_main_cde_mve_fp): New check effective.
cde_mve_regs.patch.gz
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