diff options
| author | natanbc <natanbc@users.noreply.github.com> | 2019-03-20 12:04:24 +0300 |
|---|---|---|
| committer | Guillaume Chatelet <chatelet.guillaume@gmail.com> | 2019-03-20 12:04:24 +0300 |
| commit | 084ec5cd0f29c151f3c036065c74985004bda3dc (patch) | |
| tree | 3bb450fa26d45299cb71b007f19a95d0afce0b58 | |
| parent | 7806502271dfe79b417f636839dd9de41a0be16f (diff) | |
Convert XGETBV to equivalent byte form in GetXCR0Eax (#69)v0.3.0
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'
```
| -rw-r--r-- | src/cpuinfo_x86.c | 5 |
1 files changed, 4 insertions, 1 deletions
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; } |