Displaying 4 results from an estimated 4 matches for "rep_prefix".
2011 Nov 30
0
[PATCH 4/4] x86/emulator: cleanup
...se REX_W in a few more places (instead of a literal number)
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -304,6 +304,10 @@ union vex {
ptr[1] = rex | REX_PREFIX; \
} while (0)
+#define rep_prefix() (vex.pfx >= vex_f3)
+#define repe_prefix() (vex.pfx == vex_f3)
+#define repne_prefix() (vex.pfx == vex_f2)
+
/* Type, address-of, and value of an instruction''s operand. */
struct operand {
enum { OP_REG, OP_MEM, OP_IMM, OP_NONE } type;
@@ -734,7 +738,7 @@ static unsigned lon...
2007 Feb 15
0
[PATCH] x86 emulation: suppress rep prefix handling on non-repeatable instructions
...===================================
--- 2007-02-07.orig/xen/arch/x86/x86_emulate.c 2007-02-08 08:46:39.000000000 +0100
+++ 2007-02-07/xen/arch/x86/x86_emulate.c 2007-02-08 09:32:00.000000000 +0100
@@ -1579,7 +1579,9 @@ x86_emulate(
if ( twobyte )
goto twobyte_special_insn;
- if ( rep_prefix )
+ if ( rep_prefix &&
+ (((b & ~0xf) == 0xa0 && ((0xfcf0 >> (b & 0xf)) & 1)) ||
+ (b & ~3) == 0x6c) )
{
if ( _regs.ecx == 0 )
{
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2011 Nov 30
0
[PATCH 3/4] x86/emulator: properly handle lzcnt and tzcnt
...ool_t zf;
asm ( "bsf %2,%0; setz %b1"
: "=r" (dst.val), "=q" (zf)
- : "r" (src.val), "1" (0) );
+ : "r" (src.val) );
_regs.eflags &= ~EFLG_ZF;
- if ( zf )
+ if ( (rep_prefix == REPE_PREFIX) && vcpu_has_bmi1() )
+ {
+ _regs.eflags &= ~EFLG_CF;
+ if ( zf )
+ {
+ _regs.eflags |= EFLG_CF;
+ dst.val = op_bytes * 8;
+ }
+ else if ( !dst.val )
+ _regs.eflags...
2013 Sep 23
57
[PATCH RFC v13 00/20] Introduce PVH domU support
This patch series is a reworking of a series developed by Mukesh
Rathor at Oracle. The entirety of the design and development was done
by him; I have only reworked, reorganized, and simplified things in a
way that I think makes more sense. The vast majority of the credit
for this effort therefore goes to him. This version is labelled v13
because it is based on his most recent series, v11.