Hi all, I'd like to backport support for the __jcvt intrinsic to the active branches as it's an Armv8.3-a intrinsic that should have been supported there. This is a squashed commit of the initial supported and a couple of follow-up fixes from Andrea. This is the GCC 9 version.
Bootstrapped and tested on the branch. This patch implements the __jcvt ACLE intrinsic [1] that maps down to the FJCVTZS [2] instruction from Armv8.3-a. No fancy mode iterators or nothing. Just a single builtin, UNSPEC and define_insn and the associate plumbing. This patch also defines __ARM_FEATURE_JCVT to indicate when the intrinsic is available. [1] https://developer.arm.com/docs/101028/latest/data-processing-intrinsics [2] https://developer.arm.com/docs/ddi0596/latest/simd-and-floating-point-instructions-alphabetic-order/fjcvtzs-floating-point-javascript-convert-to-signed-fixed-point-rounding-toward-zero gcc/ PR target/71233 * config/aarch64/aarch64.md (UNSPEC_FJCVTZS): Define. (aarch64_fjcvtzs): New define_insn. * config/aarch64/aarch64.h (TARGET_JSCVT): Define. * config/aarch64/aarch64-builtins.c (aarch64_builtins): Add AARCH64_JSCVT. (aarch64_init_builtins): Initialize __builtin_aarch64_jcvtzs. (aarch64_expand_builtin): Handle AARCH64_JSCVT. * config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Define __ARM_FEATURE_JCVT where appropriate. * config/aarch64/arm_acle.h (__jcvt): Define. * doc/sourcebuild.texi (aarch64_fjcvtzs_hw) Document new target supports option. gcc/testsuite/ PR target/71233 * gcc.target/aarch64/acle/jcvt_1.c: New test. * gcc.target/aarch64/acle/jcvt_2.c: New testcase. * lib/target-supports.exp (check_effective_target_aarch64_fjcvtzs_hw): Add new check for FJCVTZS hw. Co-Authored-By: Andrea Corallo <andrea.cora...@arm.com> (cherry picked from commit e1d5d19ec4f84b67ac693fef5b2add7dc9cf056d) (cherry picked from commit 2c62952f8160bdc8d4111edb34a4bc75096c1e05) (cherry picked from commit d2b86e14c14020f3e119ab8f462e2a91bd7d46e5)
jcvt-9.patch
Description: jcvt-9.patch
