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tcg/tci: Emit setcond before brcond 

The encoding planned for tci does not have enough room for
brcond2, with 4 registers and a condition as input as well
as the label.  Resolve the condition into TCG_REG_TMP, and
relax brcond to one register plus a label, considering the
condition to always be reg != 0.

Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-02-01 09:41:20 -10:00
parent baa94c0d33
commit fc8ec9e125
2 changed files with 35 additions and 85 deletions
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68
tcg/tci.c
View File

@ -147,6 +147,16 @@ static void tci_args_nll(const uint8_t **tb_ptr, uint8_t *n0,
check_size(start, tb_ptr);
}
static void tci_args_rl(const uint8_t **tb_ptr, TCGReg *r0, void **l1)
{
const uint8_t *start = *tb_ptr;
*r0 = tci_read_r(tb_ptr);
*l1 = (void *)tci_read_label(tb_ptr);
check_size(start, tb_ptr);
}
static void tci_args_rr(const uint8_t **tb_ptr,
TCGReg *r0, TCGReg *r1)
{
@ -218,19 +228,6 @@ static void tci_args_rrs(const uint8_t **tb_ptr,
check_size(start, tb_ptr);
}
static void tci_args_rrcl(const uint8_t **tb_ptr,
TCGReg *r0, TCGReg *r1, TCGCond *c2, void **l3)
{
const uint8_t *start = *tb_ptr;
*r0 = tci_read_r(tb_ptr);
*r1 = tci_read_r(tb_ptr);
*c2 = tci_read_b(tb_ptr);
*l3 = (void *)tci_read_label(tb_ptr);
check_size(start, tb_ptr);
}
static void tci_args_rrrc(const uint8_t **tb_ptr,
TCGReg *r0, TCGReg *r1, TCGReg *r2, TCGCond *c3)
{
@ -299,21 +296,6 @@ static void tci_args_rrrr(const uint8_t **tb_ptr,
check_size(start, tb_ptr);
}
static void tci_args_rrrrcl(const uint8_t **tb_ptr, TCGReg *r0, TCGReg *r1,
TCGReg *r2, TCGReg *r3, TCGCond *c4, void **l5)
{
const uint8_t *start = *tb_ptr;
*r0 = tci_read_r(tb_ptr);
*r1 = tci_read_r(tb_ptr);
*r2 = tci_read_r(tb_ptr);
*r3 = tci_read_r(tb_ptr);
*c4 = tci_read_b(tb_ptr);
*l5 = (void *)tci_read_label(tb_ptr);
check_size(start, tb_ptr);
}
static void tci_args_rrrrrc(const uint8_t **tb_ptr, TCGReg *r0, TCGReg *r1,
TCGReg *r2, TCGReg *r3, TCGReg *r4, TCGCond *c5)
{
@ -710,8 +692,8 @@ uintptr_t QEMU_DISABLE_CFI tcg_qemu_tb_exec(CPUArchState *env,
break;
#endif
case INDEX_op_brcond_i32:
tci_args_rrcl(&tb_ptr, &r0, &r1, &condition, &ptr);
if (tci_compare32(regs[r0], regs[r1], condition)) {
tci_args_rl(&tb_ptr, &r0, &ptr);
if ((uint32_t)regs[r0]) {
tb_ptr = ptr;
}
break;
@ -728,15 +710,6 @@ uintptr_t QEMU_DISABLE_CFI tcg_qemu_tb_exec(CPUArchState *env,
T2 = tci_uint64(regs[r5], regs[r4]);
tci_write_reg64(regs, r1, r0, T1 - T2);
break;
case INDEX_op_brcond2_i32:
tci_args_rrrrcl(&tb_ptr, &r0, &r1, &r2, &r3, &condition, &ptr);
T1 = tci_uint64(regs[r1], regs[r0]);
T2 = tci_uint64(regs[r3], regs[r2]);
if (tci_compare64(T1, T2, condition)) {
tb_ptr = ptr;
continue;
}
break;
case INDEX_op_mulu2_i32:
tci_args_rrrr(&tb_ptr, &r0, &r1, &r2, &r3);
tci_write_reg64(regs, r1, r0, (uint64_t)regs[r2] * regs[r3]);
@ -864,8 +837,8 @@ uintptr_t QEMU_DISABLE_CFI tcg_qemu_tb_exec(CPUArchState *env,
break;
#endif
case INDEX_op_brcond_i64:
tci_args_rrcl(&tb_ptr, &r0, &r1, &condition, &ptr);
if (tci_compare64(regs[r0], regs[r1], condition)) {
tci_args_rl(&tb_ptr, &r0, &ptr);
if (regs[r0]) {
tb_ptr = ptr;
}
break;
@ -1176,9 +1149,9 @@ int print_insn_tci(bfd_vma addr, disassemble_info *info)
case INDEX_op_brcond_i32:
case INDEX_op_brcond_i64:
tci_args_rrcl(&tb_ptr, &r0, &r1, &c, &ptr);
info->fprintf_func(info->stream, "%-12s %s, %s, %s, %p",
op_name, str_r(r0), str_r(r1), str_c(c), ptr);
tci_args_rl(&tb_ptr, &r0, &ptr);
info->fprintf_func(info->stream, "%-12s %s, 0, ne, %p",
op_name, str_r(r0), ptr);
break;
case INDEX_op_setcond_i32:
@ -1303,13 +1276,6 @@ int print_insn_tci(bfd_vma addr, disassemble_info *info)
str_r(r3), str_r(r4), str_c(c));
break;
case INDEX_op_brcond2_i32:
tci_args_rrrrcl(&tb_ptr, &r0, &r1, &r2, &r3, &c, &ptr);
info->fprintf_func(info->stream, "%-12s %s, %s, %s, %s, %s, %p",
op_name, str_r(r0), str_r(r1),
str_r(r2), str_r(r3), str_c(c), ptr);
break;
case INDEX_op_mulu2_i32:
tci_args_rrrr(&tb_ptr, &r0, &r1, &r2, &r3);
info->fprintf_func(info->stream, "%-12s %s, %s, %s, %s",

52
tcg/tci/tcg-target.c.inc
View File

@ -337,6 +337,17 @@ static void tcg_out_op_rI(TCGContext *s, TCGOpcode op,
}
#endif
static void tcg_out_op_rl(TCGContext *s, TCGOpcode op, TCGReg r0, TCGLabel *l1)
{
uint8_t *old_code_ptr = s->code_ptr;
tcg_out_op_t(s, op);
tcg_out_r(s, r0);
tci_out_label(s, l1);
old_code_ptr[1] = s->code_ptr - old_code_ptr;
}
static void tcg_out_op_rr(TCGContext *s, TCGOpcode op, TCGReg r0, TCGReg r1)
{
uint8_t *old_code_ptr = s->code_ptr;
@ -388,20 +399,6 @@ static void tcg_out_op_rrs(TCGContext *s, TCGOpcode op,
old_code_ptr[1] = s->code_ptr - old_code_ptr;
}
static void tcg_out_op_rrcl(TCGContext *s, TCGOpcode op,
TCGReg r0, TCGReg r1, TCGCond c2, TCGLabel *l3)
{
uint8_t *old_code_ptr = s->code_ptr;
tcg_out_op_t(s, op);
tcg_out_r(s, r0);
tcg_out_r(s, r1);
tcg_out8(s, c2);
tci_out_label(s, l3);
old_code_ptr[1] = s->code_ptr - old_code_ptr;
}
static void tcg_out_op_rrrc(TCGContext *s, TCGOpcode op,
TCGReg r0, TCGReg r1, TCGReg r2, TCGCond c3)
{
@ -475,23 +472,6 @@ static void tcg_out_op_rrrr(TCGContext *s, TCGOpcode op,
old_code_ptr[1] = s->code_ptr - old_code_ptr;
}
static void tcg_out_op_rrrrcl(TCGContext *s, TCGOpcode op,
TCGReg r0, TCGReg r1, TCGReg r2, TCGReg r3,
TCGCond c4, TCGLabel *l5)
{
uint8_t *old_code_ptr = s->code_ptr;
tcg_out_op_t(s, op);
tcg_out_r(s, r0);
tcg_out_r(s, r1);
tcg_out_r(s, r2);
tcg_out_r(s, r3);
tcg_out8(s, c4);
tci_out_label(s, l5);
old_code_ptr[1] = s->code_ptr - old_code_ptr;
}
static void tcg_out_op_rrrrrc(TCGContext *s, TCGOpcode op,
TCGReg r0, TCGReg r1, TCGReg r2,
TCGReg r3, TCGReg r4, TCGCond c5)
@ -697,7 +677,10 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
break;
CASE_32_64(brcond)
tcg_out_op_rrcl(s, opc, args[0], args[1], args[2], arg_label(args[3]));
tcg_out_op_rrrc(s, (opc == INDEX_op_brcond_i32
? INDEX_op_setcond_i32 : INDEX_op_setcond_i64),
TCG_REG_TMP, args[0], args[1], args[2]);
tcg_out_op_rl(s, opc, TCG_REG_TMP, arg_label(args[3]));
break;
CASE_32_64(neg) /* Optional (TCG_TARGET_HAS_neg_*). */
@ -723,8 +706,9 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
args[3], args[4], args[5]);
break;
case INDEX_op_brcond2_i32:
tcg_out_op_rrrrcl(s, opc, args[0], args[1], args[2],
args[3], args[4], arg_label(args[5]));
tcg_out_op_rrrrrc(s, INDEX_op_setcond2_i32, TCG_REG_TMP,
args[0], args[1], args[2], args[3], args[4]);
tcg_out_op_rl(s, INDEX_op_brcond_i32, TCG_REG_TMP, arg_label(args[5]));
break;
case INDEX_op_mulu2_i32:
tcg_out_op_rrrr(s, opc, args[0], args[1], args[2], args[3]);