Make Nix builds work

1 files changed, 37 insertions, 0 deletions

diff --git a/vendor/golang.org/x/sys/cpu/cpu_gccgo_x86.c b/vendor/golang.org/x/sys/cpu/cpu_gccgo_x86.c
new file mode 100644
index 0000000..3f73a05
--- /dev/null
+++ b/vendor/golang.org/x/sys/cpu/cpu_gccgo_x86.c
@@ -0,0 +1,37 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build (386 || amd64 || amd64p32) && gccgo
+
+#include <cpuid.h>
+#include <stdint.h>
+#include <x86intrin.h>
+
+// Need to wrap __get_cpuid_count because it's declared as static.
+int
+gccgoGetCpuidCount(uint32_t leaf, uint32_t subleaf,
+                   uint32_t *eax, uint32_t *ebx,
+                   uint32_t *ecx, uint32_t *edx)
+{
+        return __get_cpuid_count(leaf, subleaf, eax, ebx, ecx, edx);
+}
+
+#pragma GCC diagnostic ignored "-Wunknown-pragmas"
+#pragma GCC push_options
+#pragma GCC target("xsave")
+#pragma clang attribute push (__attribute__((target("xsave"))), apply_to=function)
+
+// xgetbv reads the contents of an XCR (Extended Control Register)
+// specified in the ECX register into registers EDX:EAX.
+// Currently, the only supported value for XCR is 0.
+void
+gccgoXgetbv(uint32_t *eax, uint32_t *edx)
+{
+        uint64_t v = _xgetbv(0);
+        *eax = v & 0xffffffff;
+        *edx = v >> 32;
+}
+
+#pragma clang attribute pop
+#pragma GCC pop_options