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Subject[PATCH 01/36] KVM: x86 emulator: reduce duplication in one operand emulation thunks
Date
Signed-off-by: Avi Kivity <avi@redhat.com>
---
arch/x86/kvm/x86_emulate.c | 66 +++++++++++++++----------------------------
1 files changed, 23 insertions(+), 43 deletions(-)

diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c
index 8f60ace..5f87d3e 100644
--- a/arch/x86/kvm/x86_emulate.c
+++ b/arch/x86/kvm/x86_emulate.c
@@ -359,6 +359,12 @@ static u16 group2_table[] = {
"andl %"_msk",%"_LO32 _tmp"; " \
"orl %"_LO32 _tmp",%"_sav"; "

+#ifdef CONFIG_X86_64
+#define ON64(x) x
+#else
+#define ON64(x)
+#endif
+
/* Raw emulation: instruction has two explicit operands. */
#define __emulate_2op_nobyte(_op,_src,_dst,_eflags,_wx,_wy,_lx,_ly,_qx,_qy) \
do { \
@@ -425,42 +431,27 @@ static u16 group2_table[] = {
__emulate_2op_nobyte(_op, _src, _dst, _eflags, \
"w", "r", _LO32, "r", "", "r")

-/* Instruction has only one explicit operand (no source operand). */
-#define emulate_1op(_op, _dst, _eflags) \
+#define __emulate_1op(_op, _dst, _eflags, _suffix) \
do { \
unsigned long _tmp; \
\
+ __asm__ __volatile__ ( \
+ _PRE_EFLAGS("0", "3", "2") \
+ _op _suffix " %1; " \
+ _POST_EFLAGS("0", "3", "2") \
+ : "=m" (_eflags), "+m" ((_dst).val), \
+ "=&r" (_tmp) \
+ : "i" (EFLAGS_MASK)); \
+ } while (0)
+
+/* Instruction has only one explicit operand (no source operand). */
+#define emulate_1op(_op, _dst, _eflags) \
+ do { \
switch ((_dst).bytes) { \
- case 1: \
- __asm__ __volatile__ ( \
- _PRE_EFLAGS("0", "3", "2") \
- _op"b %1; " \
- _POST_EFLAGS("0", "3", "2") \
- : "=m" (_eflags), "=m" ((_dst).val), \
- "=&r" (_tmp) \
- : "i" (EFLAGS_MASK)); \
- break; \
- case 2: \
- __asm__ __volatile__ ( \
- _PRE_EFLAGS("0", "3", "2") \
- _op"w %1; " \
- _POST_EFLAGS("0", "3", "2") \
- : "=m" (_eflags), "=m" ((_dst).val), \
- "=&r" (_tmp) \
- : "i" (EFLAGS_MASK)); \
- break; \
- case 4: \
- __asm__ __volatile__ ( \
- _PRE_EFLAGS("0", "3", "2") \
- _op"l %1; " \
- _POST_EFLAGS("0", "3", "2") \
- : "=m" (_eflags), "=m" ((_dst).val), \
- "=&r" (_tmp) \
- : "i" (EFLAGS_MASK)); \
- break; \
- case 8: \
- __emulate_1op_8byte(_op, _dst, _eflags); \
- break; \
+ case 1: __emulate_1op(_op, _dst, _eflags, "b"); break; \
+ case 2: __emulate_1op(_op, _dst, _eflags, "w"); break; \
+ case 4: __emulate_1op(_op, _dst, _eflags, "l"); break; \
+ case 8: ON64(__emulate_1op(_op, _dst, _eflags, "q")); break; \
} \
} while (0)

@@ -476,19 +467,8 @@ static u16 group2_table[] = {
: _qy ((_src).val), "i" (EFLAGS_MASK)); \
} while (0)

-#define __emulate_1op_8byte(_op, _dst, _eflags) \
- do { \
- __asm__ __volatile__ ( \
- _PRE_EFLAGS("0", "3", "2") \
- _op"q %1; " \
- _POST_EFLAGS("0", "3", "2") \
- : "=m" (_eflags), "=m" ((_dst).val), "=&r" (_tmp) \
- : "i" (EFLAGS_MASK)); \
- } while (0)
-
#elif defined(__i386__)
#define __emulate_2op_8byte(_op, _src, _dst, _eflags, _qx, _qy)
-#define __emulate_1op_8byte(_op, _dst, _eflags)
#endif /* __i386__ */

/* Fetch next part of the instruction being emulated. */
--
1.6.0.3


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