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[Qemu-devel] [RFC PATCH v3 21/46] target/i386: introduce modrm operand
From: |
Jan Bobek |
Subject: |
[Qemu-devel] [RFC PATCH v3 21/46] target/i386: introduce modrm operand |
Date: |
Wed, 14 Aug 2019 22:09:03 -0400 |
This permits the ModR/M byte to be passed raw into the code generator,
effectively allowing to short-circuit the operand decoding mechanism
and do the decoding work manually in the code generator.
Signed-off-by: Jan Bobek <address@hidden>
---
target/i386/translate.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/target/i386/translate.c b/target/i386/translate.c
index 7fc5149d29..25c25a30fb 100644
--- a/target/i386/translate.c
+++ b/target/i386/translate.c
@@ -4740,6 +4740,26 @@ INSNOP_FINALIZE(tcg_temp_i64)
tcg_temp_free_i64(arg);
}
+/*
+ * modrm
+ *
+ * Operand whose value is the ModR/M byte.
+ */
+typedef int insnop_arg_t(modrm);
+typedef struct {} insnop_ctxt_t(modrm);
+
+INSNOP_INIT(modrm)
+{
+ return 0;
+}
+INSNOP_PREPARE(modrm)
+{
+ return modrm;
+}
+INSNOP_FINALIZE(modrm)
+{
+}
+
static void gen_sse_ng(CPUX86State *env, DisasContext *s, int b)
{
enum {
--
2.20.1
- [Qemu-devel] [RFC PATCH v3 04/46] target/i386: use dflag from DisasContext, (continued)
- [Qemu-devel] [RFC PATCH v3 04/46] target/i386: use dflag from DisasContext, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 11/46] target/i386: introduce gen_(ld, st)d_env_A0, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 14/46] target/i386: introduce mnemonic aliases for several gvec operations, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 15/46] target/i386: introduce function ck_cpuid, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 06/46] target/i386: Simplify gen_exception arguments, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 07/46] target/i386: use pc_start from DisasContext, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 12/46] target/i386: introduce gen_sse_ng, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 13/46] target/i386: disable unused function warning temporarily, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 17/46] target/i386: introduce generic operand alias, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 16/46] target/i386: introduce instruction operand infrastructure, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 21/46] target/i386: introduce modrm operand,
Jan Bobek <=
- [Qemu-devel] [RFC PATCH v3 18/46] target/i386: introduce generic either-or operand, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 19/46] target/i386: introduce generic load-store operand, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 20/46] target/i386: introduce tcg_temp operands, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 22/46] target/i386: introduce operands for decoding modrm fields, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 23/46] target/i386: introduce operand for direct-only r/m field, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 25/46] target/i386: introduce Ib (immediate) operand, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 29/46] target/i386: introduce H*, V*, U*, W* (SSE/AVX) operands, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 28/46] target/i386: introduce P*, N*, Q* (MMX) operands, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 27/46] target/i386: introduce G*, R*, E* (general register) operands, Jan Bobek, 2019/08/14
- [Qemu-devel] [RFC PATCH v3 30/46] target/i386: introduce code generators, Jan Bobek, 2019/08/14