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Thu, 20 Jun 2024 06:03:01 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHr6TmoysP21cnHNMxklPhbR8DW1eELX2UPuk1Q/bseUyUSNPxkRMEAAsVIYq+a7NaLoUE5Mg== X-Received: by 2002:a50:d707:0:b0:57c:5fca:ab25 with SMTP id 4fb4d7f45d1cf-57d07e84bf2mr3389285a12.25.1718888581227; Thu, 20 Jun 2024 06:03:01 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , amonakov@ispras.ru Subject: [PATCH 1/6] Revert "host/i386: assume presence of POPCNT" Date: Thu, 20 Jun 2024 15:02:49 +0200 Message-ID: <20240620130254.415699-2-pbonzini@redhat.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240620130254.415699-1-pbonzini@redhat.com> References: <20240620130254.415699-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.152, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1718888680393100005 Content-Type: text/plain; charset="utf-8" This reverts commit 45ccdbcb24baf99667997fac5cf60318e5e7db51. The x86-64 instruction set can now be tuned down to x86-64 v1 or i386 Pentium Pro. Signed-off-by: Paolo Bonzini --- host/include/i386/host/cpuinfo.h | 1 + tcg/i386/tcg-target.h | 5 +++-- util/cpuinfo-i386.c | 1 + 3 files changed, 5 insertions(+), 2 deletions(-) diff --git a/host/include/i386/host/cpuinfo.h b/host/include/i386/host/cpui= nfo.h index c1e94d75ce1..72f6fad61e5 100644 --- a/host/include/i386/host/cpuinfo.h +++ b/host/include/i386/host/cpuinfo.h @@ -11,6 +11,7 @@ #define CPUINFO_ALWAYS (1u << 0) /* so cpuinfo is nonzero */ #define CPUINFO_MOVBE (1u << 2) #define CPUINFO_LZCNT (1u << 3) +#define CPUINFO_POPCNT (1u << 4) #define CPUINFO_BMI1 (1u << 5) #define CPUINFO_BMI2 (1u << 6) #define CPUINFO_AVX1 (1u << 9) diff --git a/tcg/i386/tcg-target.h b/tcg/i386/tcg-target.h index ecc69827287..2f67a97e059 100644 --- a/tcg/i386/tcg-target.h +++ b/tcg/i386/tcg-target.h @@ -111,6 +111,7 @@ typedef enum { #endif =20 #define have_bmi1 (cpuinfo & CPUINFO_BMI1) +#define have_popcnt (cpuinfo & CPUINFO_POPCNT) #define have_avx1 (cpuinfo & CPUINFO_AVX1) #define have_avx2 (cpuinfo & CPUINFO_AVX2) #define have_movbe (cpuinfo & CPUINFO_MOVBE) @@ -142,7 +143,7 @@ typedef enum { #define TCG_TARGET_HAS_nor_i32 0 #define TCG_TARGET_HAS_clz_i32 1 #define TCG_TARGET_HAS_ctz_i32 1 -#define TCG_TARGET_HAS_ctpop_i32 1 +#define TCG_TARGET_HAS_ctpop_i32 have_popcnt #define TCG_TARGET_HAS_deposit_i32 1 #define TCG_TARGET_HAS_extract_i32 1 #define TCG_TARGET_HAS_sextract_i32 1 @@ -177,7 +178,7 @@ typedef enum { #define TCG_TARGET_HAS_nor_i64 0 #define TCG_TARGET_HAS_clz_i64 1 #define TCG_TARGET_HAS_ctz_i64 1 -#define TCG_TARGET_HAS_ctpop_i64 1 +#define TCG_TARGET_HAS_ctpop_i64 have_popcnt #define TCG_TARGET_HAS_deposit_i64 1 #define TCG_TARGET_HAS_extract_i64 1 #define TCG_TARGET_HAS_sextract_i64 0 diff --git a/util/cpuinfo-i386.c b/util/cpuinfo-i386.c index 8f2694d88f2..6d474a6259a 100644 --- a/util/cpuinfo-i386.c +++ b/util/cpuinfo-i386.c @@ -35,6 +35,7 @@ unsigned __attribute__((constructor)) cpuinfo_init(void) __cpuid(1, a, b, c, d); =20 info |=3D (c & bit_MOVBE ? CPUINFO_MOVBE : 0); + info |=3D (c & bit_POPCNT ? CPUINFO_POPCNT : 0); info |=3D (c & bit_PCLMUL ? CPUINFO_PCLMUL : 0); =20 /* NOTE: our AES support requires SSSE3 (PSHUFB) as well. */ --=20 2.45.2