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[PATCH v5 44/57] tcg/tci: Emit setcond before brcond
From: |
Richard Henderson |
Subject: |
[PATCH v5 44/57] tcg/tci: Emit setcond before brcond |
Date: |
Thu, 11 Mar 2021 08:39:45 -0600 |
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.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/tci.c | 68 ++++++++++------------------------------
tcg/tci/tcg-target.c.inc | 52 +++++++++++-------------------
2 files changed, 35 insertions(+), 85 deletions(-)
diff --git a/tcg/tci.c b/tcg/tci.c
index 5718fc42a6..3f8c6a0291 100644
--- a/tcg/tci.c
+++ b/tcg/tci.c
@@ -141,6 +141,16 @@ static void tci_args_nl(const uint8_t **tb_ptr, uint8_t
*n0, void **l1)
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)
{
@@ -212,19 +222,6 @@ 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)
{
@@ -293,21 +290,6 @@ 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)
{
@@ -713,8 +695,8 @@ 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;
@@ -731,15 +713,6 @@ 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]);
@@ -867,8 +840,8 @@ 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;
@@ -1178,9 +1151,9 @@ 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:
@@ -1305,13 +1278,6 @@ 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",
diff --git a/tcg/tci/tcg-target.c.inc b/tcg/tci/tcg-target.c.inc
index b29e75425d..e06d4e9380 100644
--- a/tcg/tci/tcg-target.c.inc
+++ b/tcg/tci/tcg-target.c.inc
@@ -349,6 +349,17 @@ 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;
@@ -400,20 +411,6 @@ 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)
{
@@ -487,23 +484,6 @@ 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)
@@ -704,7 +684,10 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, const
TCGArg *args,
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_*). */
@@ -730,8 +713,9 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, const
TCGArg *args,
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]);
--
2.25.1
- Re: [PATCH v5 36/57] tcg/tci: Split out tcg_out_op_rrrrrr, (continued)
- [PATCH v5 35/57] tcg/tci: Split out tcg_out_op_rrcl, Richard Henderson, 2021/03/11
- [PATCH v5 39/57] tcg/tci: Split out tcg_out_op_{rrm,rrrm,rrrrm}, Richard Henderson, 2021/03/11
- [PATCH v5 41/57] tcg/tci: Split out tcg_out_op_np, Richard Henderson, 2021/03/11
- [PATCH v5 37/57] tcg/tci: Split out tcg_out_op_rrrr, Richard Henderson, 2021/03/11
- [PATCH v5 43/57] tcg/tci: Reserve r13 for a temporary, Richard Henderson, 2021/03/11
- [PATCH v5 44/57] tcg/tci: Emit setcond before brcond,
Richard Henderson <=
- [PATCH v5 45/57] tcg/tci: Remove tci_write_reg, Richard Henderson, 2021/03/11
- [PATCH v5 40/57] tcg/tci: Split out tcg_out_op_v, Richard Henderson, 2021/03/11
- [PATCH v5 42/57] tcg/tci: Split out tcg_out_op_r[iI], Richard Henderson, 2021/03/11
- [PATCH v5 50/57] tcg/tci: Implement extract, sextract, Richard Henderson, 2021/03/11
- [PATCH v5 51/57] tcg/tci: Implement clz, ctz, ctpop, Richard Henderson, 2021/03/11
- [PATCH v5 47/57] tcg/tci: Implement goto_ptr, Richard Henderson, 2021/03/11