Hi Jonathan,
> -----Original Message-----
> From: Jonathan Wright <jonathan.wri...@arm.com>
> Sent: 23 July 2021 09:22
> To: gcc-patches@gcc.gnu.org
> Cc: Kyrylo Tkachov <kyrylo.tkac...@arm.com>; Richard Sandiford
> <richard.sandif...@arm.com>
> Subject: [PATCH 1/8] aarch64: Use memcpy to copy vector tables in
> vqtbl[234] intrinsics
>
> 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?
>
In the testcase:
diff --git a/gcc/testsuite/gcc.target/aarch64/vector_structure_intrinsics.c
b/gcc/testsuite/gcc.target/aarch64/vector_structure_intrinsics.c
new file mode 100644
index
0000000000000000000000000000000000000000..2fab0f2947b7fa28e4e3a77bd365dcfdf30a9b28
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/vector_structure_intrinsics.c
@@ -0,0 +1,45 @@
+/* { dg-skip-if "" { arm*-*-* } } */
Files in gcc.target/aarch64 won't be attempted on arm* targets so the skip-if
isn't needed (that's only for tests in gcc.target/aarch64/advsimd-intrinsics/).
Ok with that directive removed, thanks for doing this!
Kyrill
> 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.
