target/i386: Add support for AVX-IFMA in CPUID enumeration

AVX-IFMA is a new instruction in the latest Intel platform Sierra
Forest. This instruction packed multiplies unsigned 52-bit integers and
adds the low/high 52-bit products to Qword Accumulators.

The bit definition:
CPUID.(EAX=7,ECX=1):EAX[bit 23]

Add CPUID definition for AVX-IFMA.

Signed-off-by: Jiaxi Chen <jiaxi.chen@linux.intel.com>
Signed-off-by: Tao Su <tao1.su@linux.intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-Id: <20230303065913.1246327-4-tao1.su@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 841c407d6d76a0ee2750f11cbed9939a02cfa7de..8eb2ee5045d71b4c7e0087d51e7c9e5fdba6f827 100644 (file)
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -879,7 +879,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             NULL, NULL, "fzrm", "fsrs",
             "fsrc", NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
-            NULL, "amx-fp16", NULL, NULL,
+            NULL, "amx-fp16", NULL, "avx-ifma",
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
         },

diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 7deb37eca5a8d9e1361f675db1a650a5b8f8393b..1f72d11e0ccc60a9d6db14e1811e239667212301 100644 (file)
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -917,6 +917,8 @@ uint64_t x86_cpu_get_supported_feature_word(FeatureWord w,
 #define CPUID_7_1_EAX_FSRC              (1U << 12)
 /* Support Tile Computational Operations on FP16 Numbers */
 #define CPUID_7_1_EAX_AMX_FP16          (1U << 21)
+/* Support for VPMADD52[H,L]UQ */
+#define CPUID_7_1_EAX_AVX_IFMA          (1U << 23)
 
 /* XFD Extend Feature Disabled */
 #define CPUID_D_1_EAX_XFD               (1U << 4)