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target/i386: Remove cur_eip, next_eip arguments to gen_repz*

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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.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20221001140935.465607-13-richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Richard Henderson 2022-10-01 07:09:21 -07:00 • committed by Paolo Bonzini
parent ad1d6f072d
commit 122e6d7b4a
1 changed files with 57 additions and 59 deletions
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114
target/i386/tcg/translate.c
View file

@ -736,7 +736,7 @@ static bool gen_check_io(DisasContext *s, MemOp ot, TCGv_i32 port,
#endif #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_string_movl_A0_ESI(s);
gen_op_ld_v(s, ot, s->T0, s->A0); 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 /* XXX: does not work with gdbstub "ice" single step - not a
serious problem */ 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 *l1 = gen_new_label();
TCGLabel *l2 = gen_new_label(); TCGLabel *l2 = gen_new_label();
gen_op_jnz_ecx(s, s->aflag, l1); gen_op_jnz_ecx(s, s->aflag, l1);
gen_set_label(l2); 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); gen_set_label(l1);
return l2; 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_op_mov_v_reg(s, MO_32, s->T0, R_EAX);
gen_string_movl_A0_EDI(s); 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); 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_string_movl_A0_ESI(s);
gen_op_ld_v(s, ot, s->T0, s->A0); 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); 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_string_movl_A0_EDI(s);
gen_op_ld_v(s, ot, s->T1, s->A0); 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); 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_string_movl_A0_EDI(s);
gen_op_ld_v(s, ot, s->T1, s->A0); 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); gen_string_movl_A0_EDI(s);
/* Note: we must do this dummy write first to be restartable in /* 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); 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_string_movl_A0_ESI(s);
gen_op_ld_v(s, ot, s->T0, s->A0); gen_op_ld_v(s, ot, s->T0, s->A0);
@ -1252,41 +1252,48 @@ static inline void gen_outs(DisasContext *s, MemOp ot)
gen_bpt_io(s, s->tmp2_i32, ot); gen_bpt_io(s, s->tmp2_i32, ot);
} }
/* same method as Valgrind : we generate jumps to current or next /* Generate jumps to current or next instruction */
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_REPZ(op) \ #define GEN_REPZ(op) \
static inline void gen_repz_ ## op(DisasContext *s, MemOp ot, \ static inline void gen_repz_ ## op(DisasContext *s, MemOp ot) \
target_ulong cur_eip, target_ulong next_eip) \ { gen_repz(s, ot, gen_##op); }
{ \
TCGLabel *l2; \ static void gen_repz2(DisasContext *s, MemOp ot, int nz,
gen_update_cc_op(s); \ void (*fn)(DisasContext *s, MemOp ot))
l2 = gen_jz_ecx_string(s, next_eip); \ {
gen_ ## op(s, ot); \ TCGLabel *l2;
gen_op_add_reg_im(s, s->aflag, R_ECX, -1); \ gen_update_cc_op(s);
/* a loop would cause two single step exceptions if ECX = 1 \ l2 = gen_jz_ecx_string(s);
before rep string_insn */ \ fn(s, ot);
if (s->repz_opt) \ gen_op_add_reg_im(s, s->aflag, R_ECX, -1);
gen_op_jz_ecx(s, s->aflag, l2); \ gen_update_cc_op(s);
gen_jmp(s, cur_eip); \ gen_jcc1(s, (JCC_Z << 1) | (nz ^ 1), l2);
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) \ #define GEN_REPZ2(op) \
static inline void gen_repz_ ## op(DisasContext *s, MemOp ot, \ static inline void gen_repz_ ## op(DisasContext *s, MemOp ot, int nz) \
target_ulong cur_eip, \ { gen_repz2(s, ot, nz, gen_##op); }
target_ulong next_eip, \
int nz) \
{ \
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); \
gen_update_cc_op(s); \
gen_jcc1(s, (JCC_Z << 1) | (nz ^ 1), l2); \
if (s->repz_opt) \
gen_op_jz_ecx(s, s->aflag, l2); \
gen_jmp(s, cur_eip); \
}
GEN_REPZ(movs) GEN_REPZ(movs)
GEN_REPZ(stos) GEN_REPZ(stos)
@ -6623,8 +6630,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
case 0xa5: case 0xa5:
ot = mo_b_d(b, dflag); ot = mo_b_d(b, dflag);
if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) { if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) {
gen_repz_movs(s, ot, s->base.pc_next - s->cs_base, gen_repz_movs(s, ot);
s->pc - s->cs_base);
} else { } else {
gen_movs(s, ot); gen_movs(s, ot);
} }
@ -6634,8 +6640,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
case 0xab: case 0xab:
ot = mo_b_d(b, dflag); ot = mo_b_d(b, dflag);
if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) { if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) {
gen_repz_stos(s, ot, s->base.pc_next - s->cs_base, gen_repz_stos(s, ot);
s->pc - s->cs_base);
} else { } else {
gen_stos(s, ot); gen_stos(s, ot);
} }
@ -6644,8 +6649,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
case 0xad: case 0xad:
ot = mo_b_d(b, dflag); ot = mo_b_d(b, dflag);
if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) { if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) {
gen_repz_lods(s, ot, s->base.pc_next - s->cs_base, gen_repz_lods(s, ot);
s->pc - s->cs_base);
} else { } else {
gen_lods(s, ot); gen_lods(s, ot);
} }
@ -6654,11 +6658,9 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
case 0xaf: case 0xaf:
ot = mo_b_d(b, dflag); ot = mo_b_d(b, dflag);
if (prefixes & PREFIX_REPNZ) { if (prefixes & PREFIX_REPNZ) {
gen_repz_scas(s, ot, s->base.pc_next - s->cs_base, gen_repz_scas(s, ot, 1);
s->pc - s->cs_base, 1);
} else if (prefixes & PREFIX_REPZ) { } else if (prefixes & PREFIX_REPZ) {
gen_repz_scas(s, ot, s->base.pc_next - s->cs_base, gen_repz_scas(s, ot, 0);
s->pc - s->cs_base, 0);
} else { } else {
gen_scas(s, ot); gen_scas(s, ot);
} }
@ -6668,11 +6670,9 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
case 0xa7: case 0xa7:
ot = mo_b_d(b, dflag); ot = mo_b_d(b, dflag);
if (prefixes & PREFIX_REPNZ) { if (prefixes & PREFIX_REPNZ) {
gen_repz_cmps(s, ot, s->base.pc_next - s->cs_base, gen_repz_cmps(s, ot, 1);
s->pc - s->cs_base, 1);
} else if (prefixes & PREFIX_REPZ) { } else if (prefixes & PREFIX_REPZ) {
gen_repz_cmps(s, ot, s->base.pc_next - s->cs_base, gen_repz_cmps(s, ot, 0);
s->pc - s->cs_base, 0);
} else { } else {
gen_cmps(s, ot); gen_cmps(s, ot);
} }
@ -6690,8 +6690,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
gen_io_start(); gen_io_start();
} }
if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) { if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) {
gen_repz_ins(s, ot, s->base.pc_next - s->cs_base, gen_repz_ins(s, ot);
s->pc - s->cs_base);
/* jump generated by gen_repz_ins */ /* jump generated by gen_repz_ins */
} else { } else {
gen_ins(s, ot); gen_ins(s, ot);
@ -6712,8 +6711,7 @@ static bool disas_insn(DisasContext *s, CPUState *cpu)
gen_io_start(); gen_io_start();
} }
if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) { if (prefixes & (PREFIX_REPZ | PREFIX_REPNZ)) {
gen_repz_outs(s, ot, s->base.pc_next - s->cs_base, gen_repz_outs(s, ot);
s->pc - s->cs_base);
/* jump generated by gen_repz_outs */ /* jump generated by gen_repz_outs */
} else { } else {
gen_outs(s, ot); gen_outs(s, ot);