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[37.24.206.209]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a93c2776de0sm488779466b.2.2024.09.30.00.32.46 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 30 Sep 2024 00:32:46 -0700 (PDT) Message-ID: Date: Mon, 30 Sep 2024 09:32:46 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Jan Beulich Subject: [PATCH v2] x86/{,V}AES: adjust when to force EVEX encoding To: "gcc-patches@gcc.gnu.org" Cc: Hongtao Liu , Kirill Yukhin , Jakub Jelinek Content-Language: en-US Autocrypt: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL X-Spam-Status: No, score=-3023.3 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org Commit a79d13a01f8c ("i386: Fix aes/vaes patterns [PR114576]") correctly said "..., but we need to emit {evex} prefix in the assembly if AES ISA is not enabled". Yet it did so only for the TARGET_AES insns. Going from the alternative chosen in the TARGET_VAES insns isn't quite right: If AES is (also) enabled, EVEX encoding would needlessly be forced. gcc/ * config/i386/sse.md (vaesdec_, vaesdeclast_, vaesenc_, vaesenclast_): Replace which_alternative check by TARGET_AES one. --- As an aside - {evex} (and other) pseudo-prefixes would better be avoided anyway whenever possible, as those are getting in the way of code putting in place macro overrides for certain insns: gas 2.43 rejects such bogus placement of pseudo-prefixes. Is it, btw, correct that none of these insns have a "prefix" attribute? --- v2: Adjust (shrink) description. --- a/gcc/config/i386/sse.md +++ b/gcc/config/i386/sse.md @@ -30802,7 +30802,7 @@ UNSPEC_VAESDEC))] "TARGET_VAES" { - if (which_alternative == 0 && mode == V16QImode) + if (!TARGET_AES && mode == V16QImode) return "%{evex%} vaesdec\t{%2, %1, %0|%0, %1, %2}"; else return "vaesdec\t{%2, %1, %0|%0, %1, %2}"; @@ -30816,7 +30816,7 @@ UNSPEC_VAESDECLAST))] "TARGET_VAES" { - if (which_alternative == 0 && mode == V16QImode) + if (!TARGET_AES && mode == V16QImode) return "%{evex%} vaesdeclast\t{%2, %1, %0|%0, %1, %2}"; else return "vaesdeclast\t{%2, %1, %0|%0, %1, %2}"; @@ -30830,7 +30830,7 @@ UNSPEC_VAESENC))] "TARGET_VAES" { - if (which_alternative == 0 && mode == V16QImode) + if (!TARGET_AES && mode == V16QImode) return "%{evex%} vaesenc\t{%2, %1, %0|%0, %1, %2}"; else return "vaesenc\t{%2, %1, %0|%0, %1, %2}"; @@ -30844,7 +30844,7 @@ UNSPEC_VAESENCLAST))] "TARGET_VAES" { - if (which_alternative == 0 && mode == V16QImode) + if (!TARGET_AES && mode == V16QImode) return "%{evex%} vaesenclast\t{%2, %1, %0|%0, %1, %2}"; else return "vaesenclast\t{%2, %1, %0|%0, %1, %2}";