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>
---
 target/i386/cpu.c | 2 +-
 target/i386/cpu.h | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index cd787b3d97..5ba0fc61d2 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -875,7 +875,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             NULL, NULL, NULL, NULL,
             NULL, 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 d2e3079dfb..1223f0018b 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -904,6 +904,8 @@ uint64_t x86_cpu_get_supported_feature_word(FeatureWord w,
 #define CPUID_7_1_EAX_CMPCCXADD         (1U << 7)
 /* 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)
-- 
2.27.0