This operand attempts to capture the "indirect" or "memory" operand in a generic way. It significatly reduces the amount code that needs to be written in order to read operands from memory to temporary storage and write them back.
Signed-off-by: Jan Bobek <jan.bo...@gmail.com>
---
target/i386/translate.c | 57 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 57 insertions(+)
diff --git a/target/i386/translate.c b/target/i386/translate.c
index 68c6b7d16b..1be6176934 100644
--- a/target/i386/translate.c
+++ b/target/i386/translate.c
@@ -4670,6 +4670,63 @@ static bool check_cpuid(CPUX86State *env, DisasContext
*s, CheckCpuidFeat feat)
env, s, modrm, is_write, arg)); \
}
+/*
+ * Generic load-store operand
+ */
+#define insnop_ldst(opTarg, opTptr) \
+ insnop_ldst_ ## opTarg ## opTptr
+
+#define INSNOP_LDST(opTarg, opTptr) \
+ static void insnop_ldst(opTarg, opTptr)(CPUX86State *env, \
+ DisasContext *s, \
+ bool is_write, \
+ insnop_arg_t(opTarg) arg, \
+ insnop_arg_t(opTptr) ptr)
+
+#define DEF_INSNOP_LDST(opT, opTarg, opTptr) \
+ typedef insnop_arg_t(opTarg) insnop_arg_t(opT); \
+ typedef struct { \
+ insnop_ctxt_t(opTarg) arg_ctxt; \
+ insnop_ctxt_t(opTptr) ptr_ctxt; \
+ insnop_arg_t(opTptr) ptr; \
+ } insnop_ctxt_t(opT); \
+ \
+ /* forward declaration */ \
+ INSNOP_LDST(opTarg, opTptr); \
+ \
+ INSNOP_INIT(opT) \
+ { \
+ return insnop_init(opTarg)(&ctxt->arg_ctxt, \
+ env, s, modrm, is_write) \
+ && insnop_init(opTptr)(&ctxt->ptr_ctxt, \
+ env, s, modrm, is_write); \
+ } \
+ INSNOP_PREPARE(opT) \
+ { \
+ const insnop_arg_t(opTarg) arg = \
+ insnop_prepare(opTarg)(&ctxt->arg_ctxt, \
+ env, s, modrm, is_write); \
+ ctxt->ptr = \
+ insnop_prepare(opTptr)(&ctxt->ptr_ctxt, \
+ env, s, modrm, is_write); \
+ if (!is_write) { \
+ insnop_ldst(opTarg, opTptr)(env, s, is_write, \
+ arg, ctxt->ptr); \
+ } \
+ return arg; \
+ } \
+ INSNOP_FINALIZE(opT) \
+ { \
+ if (is_write) { \
+ insnop_ldst(opTarg, opTptr)(env, s, is_write, \
+ arg, ctxt->ptr); \
+ } \
+ insnop_finalize(opTptr)(&ctxt->ptr_ctxt, \
+ env, s, modrm, is_write, ctxt->ptr); \
+ insnop_finalize(opTarg)(&ctxt->arg_ctxt, \
+ env, s, modrm, is_write, arg); \
+ }
+
static void gen_sse_ng(CPUX86State *env, DisasContext *s, int b)
{
enum {
--
2.20.1
