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

AVX-NE-CONVERT is a new set of instructions which can convert low
precision floating point like BF16/FP16 to high precision floating point
FP32, as well as convert FP32 elements to BF16. This instruction allows
the platform to have improved AI capabilities and better compatibility.

The bit definition:
CPUID.(EAX=7,ECX=1):EDX[bit 5]

Add CPUID definition for AVX-NE-CONVERT.

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: <20230303065913.1246327-6-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 abceab2b6992d384fea0fb091a6267f94b004a4f..0204a3ac801a89dddeb635d8fa950ad9262a0340 100644 (file)
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -895,7 +895,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
         .type = CPUID_FEATURE_WORD,
         .feat_names = {
             NULL, NULL, NULL, NULL,
-            "avx-vnni-int8", NULL, NULL, NULL,
+            "avx-vnni-int8", "avx-ne-convert", NULL, NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,

diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 0b25d180753b8407c69b1b68a5c94e7aa41a233f..b46d52f3fa44f0adacda7b5a8006ca194da7e6d0 100644 (file)
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -923,6 +923,8 @@ uint64_t x86_cpu_get_supported_feature_word(FeatureWord w,
 
 /* Support for VPDPB[SU,UU,SS]D[,S] */
 #define CPUID_7_1_EDX_AVX_VNNI_INT8     (1U << 4)
+/* AVX NE CONVERT Instructions */
+#define CPUID_7_1_EDX_AVX_NE_CONVERT    (1U << 5)
 
 /* XFD Extend Feature Disabled */
 #define CPUID_D_1_EAX_XFD               (1U << 4)