From 084ec5cd0f29c151f3c036065c74985004bda3dc Mon Sep 17 00:00:00 2001
From: natanbc <natanbc@users.noreply.github.com>
Date: Wed, 20 Mar 2019 06:04:24 -0300
Subject: [PATCH] Convert XGETBV to equivalent byte form in GetXCR0Eax (#69)

osxcross (https://github.com/tpoechtrager/osxcross) gives the following error, which also happens with regular gcc on OS X (https://github.com/asmjit/asmjit/issues/78):
```
cpu_features/src/cpuinfo_x86.c:44:no such instruction: `XGETBV'
```
---
 src/cpuinfo_x86.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/cpuinfo_x86.c b/src/cpuinfo_x86.c
index 2bec7bd..52f178f 100644
--- a/src/cpuinfo_x86.c
+++ b/src/cpuinfo_x86.c
@@ -41,7 +41,10 @@ Leaf CpuId(uint32_t leaf_id) {
 
 uint32_t GetXCR0Eax(void) {
   uint32_t eax, edx;
-  __asm("XGETBV" : "=a"(eax), "=d"(edx) : "c"(0));
+  /* named form of xgetbv not supported on OSX, so must use byte form, see:
+     https://github.com/asmjit/asmjit/issues/78
+   */
+  __asm(".byte 0x0F, 0x01, 0xd0" : "=a"(eax), "=d"(edx) : "c"(0));
   return eax;
 }