Re: [PATCH v2 12/23] target/i386: Remove cur_eip, next_eip arguments to gen_repz*
On Tue, Sep 6, 2022 at 12:09 PM Richard Henderson
wrote:
>
> All callers pass s->base.pc_next and s->pc, which we can just
> as well compute within the functions. Pull out common helpers
> and reduce the amount of code under macros.
>
> Signed-off-by: Richard Henderson
Reviewed-by: Paolo Bonzini
> ---
> target/i386/tcg/translate.c | 116 ++--
> 1 file changed, 57 insertions(+), 59 deletions(-)
>
> diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
> index 393a1c1075..f3c26a9956 100644
> --- a/target/i386/tcg/translate.c
> +++ b/target/i386/tcg/translate.c
> @@ -736,7 +736,7 @@ static bool gen_check_io(DisasContext *s, MemOp ot,
> TCGv_i32 port,
> #endif
> }
>
> -static inline void gen_movs(DisasContext *s, MemOp ot)
> +static void gen_movs(DisasContext *s, MemOp ot)
> {
> gen_string_movl_A0_ESI(s);
> gen_op_ld_v(s, ot, s->T0, s->A0);
> @@ -1156,18 +1156,18 @@ static inline void gen_jcc1(DisasContext *s, int b,
> TCGLabel *l1)
>
> /* XXX: does not work with gdbstub "ice" single step - not a
> serious problem */
> -static TCGLabel *gen_jz_ecx_string(DisasContext *s, target_ulong next_eip)
> +static TCGLabel *gen_jz_ecx_string(DisasContext *s)
> {
> TCGLabel *l1 = gen_new_label();
> TCGLabel *l2 = gen_new_label();
> gen_op_jnz_ecx(s, s->aflag, l1);
> gen_set_label(l2);
> -gen_jmp_tb(s, next_eip, 1);
> +gen_jmp_tb(s, s->pc - s->cs_base, 1);
> gen_set_label(l1);
> return l2;
> }
>
> -static inline void gen_stos(DisasContext *s, MemOp ot)
> +static void gen_stos(DisasContext *s, MemOp ot)
> {
> gen_op_mov_v_reg(s, MO_32, s->T0, R_EAX);
> gen_string_movl_A0_EDI(s);
> @@ -1176,7 +1176,7 @@ static inline void gen_stos(DisasContext *s, MemOp ot)
> gen_op_add_reg_T0(s, s->aflag, R_EDI);
> }
>
> -static inline void gen_lods(DisasContext *s, MemOp ot)
> +static void gen_lods(DisasContext *s, MemOp ot)
> {
> gen_string_movl_A0_ESI(s);
> gen_op_ld_v(s, ot, s->T0, s->A0);
> @@ -1185,7 +1185,7 @@ static inline void gen_lods(DisasContext *s, MemOp ot)
> gen_op_add_reg_T0(s, s->aflag, R_ESI);
> }
>
> -static inline void gen_scas(DisasContext *s, MemOp ot)
> +static void gen_scas(DisasContext *s, MemOp ot)
> {
> gen_string_movl_A0_EDI(s);
> gen_op_ld_v(s, ot, s->T1, s->A0);
> @@ -1194,7 +1194,7 @@ static inline void gen_scas(DisasContext *s, MemOp ot)
> gen_op_add_reg_T0(s, s->aflag, R_EDI);
> }
>
> -static inline void gen_cmps(DisasContext *s, MemOp ot)
> +static void gen_cmps(DisasContext *s, MemOp ot)
> {
> gen_string_movl_A0_EDI(s);
> gen_op_ld_v(s, ot, s->T1, s->A0);
> @@ -1222,7 +1222,7 @@ static void gen_bpt_io(DisasContext *s, TCGv_i32
> t_port, int ot)
> }
> }
>
> -static inline void gen_ins(DisasContext *s, MemOp ot)
> +static void gen_ins(DisasContext *s, MemOp ot)
> {
> gen_string_movl_A0_EDI(s);
> /* Note: we must do this dummy write first to be restartable in
> @@ -1238,7 +1238,7 @@ static inline void gen_ins(DisasContext *s, MemOp ot)
> gen_bpt_io(s, s->tmp2_i32, ot);
> }
>
> -static inline void gen_outs(DisasContext *s, MemOp ot)
> +static void gen_outs(DisasContext *s, MemOp ot)
> {
> gen_string_movl_A0_ESI(s);
> gen_op_ld_v(s, ot, s->T0, s->A0);
> @@ -1252,42 +1252,49 @@ static inline void gen_outs(DisasContext *s, MemOp ot)
> gen_bpt_io(s, s->tmp2_i32, ot);
> }
>
> -/* same method as Valgrind : we generate jumps to current or next
> - instruction */
> -#define GEN_REPZ(op)
> \
> -static inline void gen_repz_ ## op(DisasContext *s, MemOp ot, \
> - target_ulong cur_eip, target_ulong
> next_eip) \
> -{
> \
> -TCGLabel *l2;
> \
> -gen_update_cc_op(s);
> \
> -l2 = gen_jz_ecx_string(s, next_eip);
> \
> -gen_ ## op(s, ot);
> \
> -gen_op_add_reg_im(s, s->aflag, R_ECX, -1);
> \
> -/* a loop would cause two single step exceptions if ECX = 1
> \
> - before rep string_insn */
> \
> -if (s->repz_opt)
> \
> -gen_op_jz_ecx(s, s->aflag, l2);
> \
> -gen_jmp(s, cur_eip);
> \
> +/* Generate jumps to current or next instruction */
> +static void gen_repz(DisasContext *s, MemOp ot,
> + void (*fn)(DisasContext *s, MemOp ot))
> +{
> +TCGLabel *l2;
> +gen_update_cc_op(s);
> +l2 = gen_jz_ecx_string(s);
> +
[PATCH v2 12/23] target/i386: Remove cur_eip, next_eip arguments to gen_repz*
All callers pass s->base.pc_next and s->pc, which we can just
as well compute within the functions. Pull out common helpers
and reduce the amount of code under macros.
Signed-off-by: Richard Henderson
---
target/i386/tcg/translate.c | 116 ++--
1 file changed, 57 insertions(+), 59 deletions(-)
diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c
index 393a1c1075..f3c26a9956 100644
--- a/target/i386/tcg/translate.c
+++ b/target/i386/tcg/translate.c
@@ -736,7 +736,7 @@ static bool gen_check_io(DisasContext *s, MemOp ot,
TCGv_i32 port,
#endif
}
-static inline void gen_movs(DisasContext *s, MemOp ot)
+static void gen_movs(DisasContext *s, MemOp ot)
{
gen_string_movl_A0_ESI(s);
gen_op_ld_v(s, ot, s->T0, s->A0);
@@ -1156,18 +1156,18 @@ static inline void gen_jcc1(DisasContext *s, int b,
TCGLabel *l1)
/* XXX: does not work with gdbstub "ice" single step - not a
serious problem */
-static TCGLabel *gen_jz_ecx_string(DisasContext *s, target_ulong next_eip)
+static TCGLabel *gen_jz_ecx_string(DisasContext *s)
{
TCGLabel *l1 = gen_new_label();
TCGLabel *l2 = gen_new_label();
gen_op_jnz_ecx(s, s->aflag, l1);
gen_set_label(l2);
-gen_jmp_tb(s, next_eip, 1);
+gen_jmp_tb(s, s->pc - s->cs_base, 1);
gen_set_label(l1);
return l2;
}
-static inline void gen_stos(DisasContext *s, MemOp ot)
+static void gen_stos(DisasContext *s, MemOp ot)
{
gen_op_mov_v_reg(s, MO_32, s->T0, R_EAX);
gen_string_movl_A0_EDI(s);
@@ -1176,7 +1176,7 @@ static inline void gen_stos(DisasContext *s, MemOp ot)
gen_op_add_reg_T0(s, s->aflag, R_EDI);
}
-static inline void gen_lods(DisasContext *s, MemOp ot)
+static void gen_lods(DisasContext *s, MemOp ot)
{
gen_string_movl_A0_ESI(s);
gen_op_ld_v(s, ot, s->T0, s->A0);
@@ -1185,7 +1185,7 @@ static inline void gen_lods(DisasContext *s, MemOp ot)
gen_op_add_reg_T0(s, s->aflag, R_ESI);
}
-static inline void gen_scas(DisasContext *s, MemOp ot)
+static void gen_scas(DisasContext *s, MemOp ot)
{
gen_string_movl_A0_EDI(s);
gen_op_ld_v(s, ot, s->T1, s->A0);
@@ -1194,7 +1194,7 @@ static inline void gen_scas(DisasContext *s, MemOp ot)
gen_op_add_reg_T0(s, s->aflag, R_EDI);
}
-static inline void gen_cmps(DisasContext *s, MemOp ot)
+static void gen_cmps(DisasContext *s, MemOp ot)
{
gen_string_movl_A0_EDI(s);
gen_op_ld_v(s, ot, s->T1, s->A0);
@@ -1222,7 +1222,7 @@ static void gen_bpt_io(DisasContext *s, TCGv_i32 t_port,
int ot)
}
}
-static inline void gen_ins(DisasContext *s, MemOp ot)
+static void gen_ins(DisasContext *s, MemOp ot)
{
gen_string_movl_A0_EDI(s);
/* Note: we must do this dummy write first to be restartable in
@@ -1238,7 +1238,7 @@ static inline void gen_ins(DisasContext *s, MemOp ot)
gen_bpt_io(s, s->tmp2_i32, ot);
}
-static inline void gen_outs(DisasContext *s, MemOp ot)
+static void gen_outs(DisasContext *s, MemOp ot)
{
gen_string_movl_A0_ESI(s);
gen_op_ld_v(s, ot, s->T0, s->A0);
@@ -1252,42 +1252,49 @@ static inline void gen_outs(DisasContext *s, MemOp ot)
gen_bpt_io(s, s->tmp2_i32, ot);
}
-/* same method as Valgrind : we generate jumps to current or next
- instruction */
-#define GEN_REPZ(op) \
-static inline void gen_repz_ ## op(DisasContext *s, MemOp ot, \
- target_ulong cur_eip, target_ulong next_eip) \
-{ \
-TCGLabel *l2; \
-gen_update_cc_op(s); \
-l2 = gen_jz_ecx_string(s, next_eip); \
-gen_ ## op(s, ot);\
-gen_op_add_reg_im(s, s->aflag, R_ECX, -1);\
-/* a loop would cause two single step exceptions if ECX = 1 \
- before rep string_insn */ \
-if (s->repz_opt) \
-gen_op_jz_ecx(s, s->aflag, l2); \
-gen_jmp(s, cur_eip); \
+/* Generate jumps to current or next instruction */
+static void gen_repz(DisasContext *s, MemOp ot,
+ void (*fn)(DisasContext *s, MemOp ot))
+{
+TCGLabel *l2;
+gen_update_cc_op(s);
+l2 = gen_jz_ecx_string(s);
+fn(s, ot);
+gen_op_add_reg_im(s, s->aflag, R_ECX, -1);
+/*
+ * A loop would cause two single step exceptions if ECX = 1
+ * before rep string_insn
+ */
+if (s->repz_opt) {
+gen_op_jz_ecx(s, s->aflag, l2);
+}
+gen_jmp(s, s->base.pc_next - s->cs_base);
}
-#define GEN_REPZ2(op)
