From 2739e435739f502e75e704b01dfb8e569015d6c2 Mon Sep 17 00:00:00 2001
From: psychocrypt <psychocryptHPC@gmail.com>
Date: Sun, 10 Mar 2019 22:40:09 +0100
Subject: [PATCH] fix avx destection
The OS is able to disable avx. In that case our avx detection is wrong.
See xmrig issue: https://github.com/xmrig/xmrig/issues/951
Import fix: https://github.com/xmrig/xmrig/commit/6052da3c4399514c95245b2d342f04baa20958db#diff-92fa29935c136762d35981769ac79f52
thx @xmrig for the notification.
---
xmrstak/backend/cpu/cpuType.cpp | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/xmrstak/backend/cpu/cpuType.cpp b/xmrstak/backend/cpu/cpuType.cpp
index 5959b75..c85682d 100644
--- a/xmrstak/backend/cpu/cpuType.cpp
+++ b/xmrstak/backend/cpu/cpuType.cpp
@@ -37,9 +37,9 @@ namespace cpu
{
int32_t mask = 1 << bit;
return (val & mask) != 0u;
-
+
}
-
+
Model getModel()
{
int32_t cpu_info[4];
@@ -53,7 +53,7 @@ namespace cpu
Model result;
cpuid(1, 0, cpu_info);
-
+
result.family = get_masked(cpu_info[0], 12, 8);
result.model = get_masked(cpu_info[0], 8, 4) | get_masked(cpu_info[0], 20, 16) << 4;
result.type_name = cpustr;
@@ -63,8 +63,8 @@ namespace cpu
result.sse2 = has_feature(cpu_info[3], 26);
// aes-ni
result.aes = has_feature(cpu_info[2], 25);
- // avx
- result.avx = has_feature(cpu_info[2], 28);
+ // avx - 27 is the check if the OS overwrote cpu features
+ result.avx = has_feature(cpu_info[2], 28) && has_feature(cpu_info[2], 27) ;
if(strcmp(cpustr, "AuthenticAMD") == 0)
{
--
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