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[RFC,v4,25/75] target/i386: introduce Ib (immediate) operand

Message ID 20190821172951.15333-26-jan.bobek@gmail.com (mailing list archive)
State New, archived
Headers show
Series rewrite MMX/SSE*/AVX/AVX2 vector instruction translation | expand

Commit Message

Jan Bobek Aug. 21, 2019, 5:29 p.m. UTC 
Introduce the immediate-byte operand, which loads a byte from the
instruction stream and passes its value as the operand.

Signed-off-by: Jan Bobek <jan.bobek@gmail.com>
---
 target/i386/translate.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
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Patch

diff --git a/target/i386/translate.c b/target/i386/translate.c
index 886f64a58f..9f02ea58d1 100644
--- a/target/i386/translate.c
+++ b/target/i386/translate.c
@@ -4890,6 +4890,24 @@  INSNOP_FINALIZE(modrm_rm_direct)
     insnop_finalize(modrm_rm)(&ctxt->rm, env, s, modrm, is_write, arg);
 }
 
+/*
+ * Immediate operand
+ */
+typedef uint8_t insnop_arg_t(Ib);
+typedef struct {} insnop_ctxt_t(Ib);
+
+INSNOP_INIT(Ib)
+{
+    return true;
+}
+INSNOP_PREPARE(Ib)
+{
+    return x86_ldub_code(env, s);
+}
+INSNOP_FINALIZE(Ib)
+{
+}
+
 static void gen_sse_ng(CPUX86State *env, DisasContext *s, int b)
 {
     enum {