From: H.J. Lu <hjl.tools@gmail.com>
Date: Sat, 20 Jun 2020 04:17:26 +0000 (-0700)
Subject: x86: Add Cooper Lake detection with AVX512BF16
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=403e166b974f53982d78efdd70938d05b6983b2a;p=gcc.git

x86: Add Cooper Lake detection with AVX512BF16

All Sky Lake family processors have the same CPUID model number, 0x55.
The differences are Cascade Lake has AVX512VNNI and Cooper Lake has
AVX512VNNI + AVX512BF16.  Check AVX512BF16 for Cooper Lake.

	PR target/95774
	* common/config/i386/cpuinfo.h (get_intel_cpu): Add Cooper Lake
	detection with AVX512BF16.
---

diff --git a/gcc/common/config/i386/cpuinfo.h b/gcc/common/config/i386/cpuinfo.h
index 2d72b3b60fd..27b7b4d8581 100644
--- a/gcc/common/config/i386/cpuinfo.h
+++ b/gcc/common/config/i386/cpuinfo.h
@@ -398,7 +398,15 @@ get_intel_cpu (struct __processor_model *cpu_model,
       CHECK___builtin_cpu_is ("corei7");
       cpu_model->__cpu_type = INTEL_COREI7;
       if (has_cpu_feature (cpu_model, cpu_features2,
-			   FEATURE_AVX512VNNI))
+			   FEATURE_AVX512BF16))
+	{
+	  /* Cooper Lake.  */
+	  cpu = "cooperlake";
+	  CHECK___builtin_cpu_is ("cooperlake");
+	  cpu_model->__cpu_subtype = INTEL_COREI7_COOPERLAKE;
+	}
+      else if (has_cpu_feature (cpu_model, cpu_features2,
+				FEATURE_AVX512VNNI))
 	{
 	  /* Cascade Lake.  */
 	  cpu = "cascadelake";