From 3f9ffddc835fc93a2ddac7b4be58ec879cc2426a Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Wed, 2 Aug 2017 16:34:02 -0400
Subject: [PATCH] os/2: attempt to get cpuid support on OpenWatcom builds.

---
 src/physfs_lzmasdk.h | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/physfs_lzmasdk.h b/src/physfs_lzmasdk.h
index 688c4aae..25900969 100644
--- a/src/physfs_lzmasdk.h
+++ b/src/physfs_lzmasdk.h
@@ -1450,6 +1450,19 @@ static UInt32 CheckFlag(UInt32 flag)
 #define CHECK_CPUID_IS_SUPPORTED
 #endif
 
+#if defined(__WATCOMC__)
+static void __cpuid( int cpuinfo[4], uint32_t infotype );
+#pragma aux __cpuid =      \
+    ".586"                \
+    "cpuid"               \
+    "mov  [esi+0],eax"    \
+    "mov  [esi+4],ebx"    \
+    "mov  [esi+8],ecx"    \
+    "mov  [esi+12],edx"   \
+    parm [esi] [eax] modify [ebx ecx edx];
+#endif
+
+
 static void MyCPUID(UInt32 function, UInt32 *a, UInt32 *b, UInt32 *c, UInt32 *d)
 {
   #ifdef USE_ASM
@@ -1498,9 +1511,6 @@ static void MyCPUID(UInt32 function, UInt32 *a, UInt32 *b, UInt32 *c, UInt32 *d)
 
   #endif
 
-  #elif defined(__WATCOMC__)
-  *a = *b = *c = *d = 0;  /* !!! FIXME: oh well for now. */
-
   #else
 
   int CPUInfo[4];