Hi, This patch uses __builtin_memcpy to copy vector structures instead of building a new opaque structure one vector at a time in each of the vqtbl[234] Neon intrinsics in arm_neon.h. This simplifies the header file and also improves code generation - superfluous move instructions were emitted for every register extraction/set in this additional structure.
Add new code generation tests to verify that superfluous move
instructions are no longer generated for the vqtbl[234] intrinsics.
Regression tested and bootstrapped on aarch64-none-linux-gnu - no
issues.
Ok for master?
Thanks,
Jonathan
---
gcc/ChangeLog:
2021-07-08 Jonathan Wright <jonathan.wri...@arm.com>
* config/aarch64/arm_neon.h (vqtbl2_s8): Use __builtin_memcpy
instead of constructing __builtin_aarch64_simd_oi one vector
at a time.
(vqtbl2_u8): Likewise.
(vqtbl2_p8): Likewise.
(vqtbl2q_s8): Likewise.
(vqtbl2q_u8): Likewise.
(vqtbl2q_p8): Likewise.
(vqtbl3_s8): Use __builtin_memcpy instead of constructing
__builtin_aarch64_simd_ci one vector at a time.
(vqtbl3_u8): Likewise.
(vqtbl3_p8): Likewise.
(vqtbl3q_s8): Likewise.
(vqtbl3q_u8): Likewise.
(vqtbl3q_p8): Likewise.
(vqtbl4_s8): Use __builtin_memcpy instead of constructing
__builtin_aarch64_simd_xi one vector at a time.
(vqtbl4_u8): Likewise.
(vqtbl4_p8): Likewise.
(vqtbl4q_s8): Likewise.
(vqtbl4q_u8): Likewise.
(vqtbl4q_p8): Likewise.
gcc/testsuite/ChangeLog:
* gcc.target/aarch64/vector_structure_intrinsics.c: New test.
rb14639.patch
Description: rb14639.patch
