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Re: [PATCHv2] memcpy for ThunderX2

From: Richard Henderson <rth at twiddle dot net>
To: "Saharoy, Saikat" <Saikat dot Saharoy at cavium dot com>, "libc-alpha at sourceware dot org" <libc-alpha at sourceware dot org>
Date: Tue, 20 Jun 2017 20:02:08 -0700
Subject: Re: [PATCHv2] memcpy for ThunderX2
Authentication-results: sourceware.org; auth=none
References: <CY4PR07MB2885AFCD45C697C0522D37BDE4C50@CY4PR07MB2885.namprd07.prod.outlook.com>

On 06/20/2017 03:06 PM, Saharoy, Saikat wrote:

    /* Support sysdeps/aarch64/multiarch/memcpy.c and memmove.c.  */
    IFUNC_IMPL (i, name, memcpy,
-	      IFUNC_IMPL_ADD (array, i, memcpy, IS_THUNDERX (midr),
-			      __memcpy_thunderx)
-	      IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_generic))
+              IFUNC_IMPL_ADD (array, i, memcpy, IS_THUNDERX2 (midr) || IS_THUNDERX2PA (midr),
+                              __memcpy_thunderx2)
+              IFUNC_IMPL_ADD (array, i, memcpy, IS_THUNDERX (midr),
+                              __memcpy_thunderx)
+              IFUNC_IMPL_ADD (array, i, memcpy, 1, __memcpy_generic))

This is for testing. Therefore you should run all implementations that can berun by the host, even those that are not tuned for the host. I suspect thatboth your new implementation and the thunderx1 implementation, can be run byall armv8 hosts.

r~

References:
- [PATCHv2] memcpy for ThunderX2
  - From: Saharoy, Saikat

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