PERFORCE change 213866 for review
John Baldwin
jhb at FreeBSD.org
Tue Jul 3 20:01:25 UTC 2012
http://p4web.freebsd.org/@@213866?ac=10
Change 213866 by jhb at jhb_ralph on 2012/07/03 20:00:43
Let the assembler see xsave/xrstor/xsaveopt/xgetbv/xsetbv
instructions if NEW_AS is defined. (I'm have some patches
to add those to binutils.)
Affected files ...
.. //depot/projects/smpng/sys/modules/x86dis/x86dis.c#3 edit
Differences ...
==== //depot/projects/smpng/sys/modules/x86dis/x86dis.c#3 (text+ko) ====
@@ -1,5 +1,7 @@
#include <sys/types.h>
+//#define NEW_AS
+
static __inline void
xrstor(char *addr, uint64_t mask)
{
@@ -7,9 +9,13 @@
low = mask;
hi = mask >> 32;
+#ifdef NEW_AS
+ __asm __volatile("xrstor %0" : : "m" (addr), "a" (low), "d" (hi));
+#else
/* xrstor (%rdi) */
__asm __volatile(".byte 0x0f,0xae,0x2f" : :
"a" (low), "d" (hi), "D" (addr));
+#endif
}
static __inline void
@@ -19,9 +25,14 @@
low = mask;
hi = mask >> 32;
+#ifdef NEW_AS
+ __asm __volatile("xsave %0" : "=m" (addr) : "a" (low), "d" (hi) :
+ "memory");
+#else
/* xsave (%rdi) */
__asm __volatile(".byte 0x0f,0xae,0x27" : :
"a" (low), "d" (hi), "D" (addr) : "memory");
+#endif
}
static __inline void
@@ -31,9 +42,14 @@
low = mask;
hi = mask >> 32;
+#ifdef NEW_AS
+ __asm __volatile("xsaveopt %0" : "=m" (addr) : "a" (low), "d" (hi) :
+ "memory");
+#else
/* xsaveopt (%rdi) */
__asm __volatile(".byte 0x0f,0xae,0x37" : :
"a" (low), "d" (hi), "D" (addr) : "memory");
+#endif
}
static __inline uint64_t
@@ -41,8 +57,12 @@
{
uint32_t low, high;
+#ifdef NEW_AS
+ __asm __volatile("xgetbv" : "=a" (low), "=d" (high) : "c" (reg));
+#else
__asm __volatile(".byte 0x0f,0x01,0xd0" : "=a" (low), "=d" (high) :
"c" (reg));
+#endif
return (low | ((uint64_t)high << 32));
}
@@ -53,8 +73,12 @@
low = val;
hi = val >> 32;
+#ifdef NEW_AS
+ __asm __volatile("xsetbv" : : "c" (reg), "a" (low), "d" (hi));
+#else
__asm __volatile(".byte 0x0f,0x01,0xd1" : :
"c" (reg), "a" (low), "d" (hi));
+#endif
}
static __inline uint64_t
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