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[PATCH 2/6] target/i386: Add support for AMX-FP16 in CPUID enumeration
From: |
Jiaxi Chen |
Subject: |
[PATCH 2/6] target/i386: Add support for AMX-FP16 in CPUID enumeration |
Date: |
Thu, 8 Dec 2022 15:19:13 +0800 |
Latest Intel platform Granite Rapids has introduced a new instruction -
AMX-FP16, which performs dot-products of two FP16 tiles and accumulates
the results into a packed single precision tile. AMX-FP16 adds FP16
capability and allows a FP16 GPU trained model to run faster without
loss of accuracy or added SW overhead.
The bit definition:
CPUID.(EAX=7,ECX=1):EAX[bit 21]
Add CPUID definition for AMX-FP16.
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 a61f936eef..cd787b3d97 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, NULL, NULL, NULL,
+ NULL, "amx-fp16", NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
},
diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index 3391b99456..d2e3079dfb 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -902,6 +902,8 @@ uint64_t x86_cpu_get_supported_feature_word(FeatureWord w,
#define CPUID_7_1_EAX_AVX512_BF16 (1U << 5)
/* CMPCCXADD Instructions */
#define CPUID_7_1_EAX_CMPCCXADD (1U << 7)
+/* Support Tile Computational Operations on FP16 Numbers */
+#define CPUID_7_1_EAX_AMX_FP16 (1U << 21)
/* XFD Extend Feature Disabled */
#define CPUID_D_1_EAX_XFD (1U << 4)
--
2.27.0
- [PATCH 0/6] target/i386: Support new Intel platform Instructions in CPUID enumeration, Jiaxi Chen, 2022/12/08
- [PATCH 2/6] target/i386: Add support for AMX-FP16 in CPUID enumeration,
Jiaxi Chen <=
- [PATCH 3/6] target/i386: Add support for AVX-IFMA in CPUID enumeration, Jiaxi Chen, 2022/12/08
- [PATCH 1/6] target/i386: Add support for CMPCCXADD in CPUID enumeration, Jiaxi Chen, 2022/12/08
- [PATCH 5/6] target/i386: Add support for AVX-NE-CONVERT in CPUID enumeration, Jiaxi Chen, 2022/12/08
- [PATCH 4/6] target/i386: Add support for AVX-VNNI-INT8 in CPUID enumeration, Jiaxi Chen, 2022/12/08
- [PATCH 6/6] target/i386: Add support for PREFETCHIT0/1 in CPUID enumeration, Jiaxi Chen, 2022/12/08