From: Brian Cain <bcain@quicinc.com>
To: <qemu-devel@nongnu.org>
Cc: <bcain@quicinc.com>, <armbru@redhat.com>,
<richard.henderson@linaro.org>, <philmd@linaro.org>,
<peter.maydell@linaro.org>, <quic_mathbern@quicinc.com>,
<stefanha@redhat.com>, <ale@rev.ng>, <anjo@rev.ng>,
<quic_mliebel@quicinc.com>, <ltaylorsimpson@gmail.com>
Subject: [PULL 09/15] Hexagon (target/hexagon) Mark dest_idx in trans functions
Date: Sun, 5 May 2024 19:42:21 -0700 [thread overview]
Message-ID: <20240506024227.3345791-10-bcain@quicinc.com> (raw)
In-Reply-To: <20240506024227.3345791-1-bcain@quicinc.com>
From: Taylor Simpson <ltaylorsimpson@gmail.com>
Check that the value matches opcode_reginfo/opcode_wregs
Signed-off-by: Taylor Simpson <ltaylorsimpson@gmail.com>
Reviewed-by: Brian Cain <bcain@quicinc.com>
Message-Id: <20240307032327.4799-4-ltaylorsimpson@gmail.com>
Signed-off-by: Brian Cain <bcain@quicinc.com>
---
target/hexagon/decode.c | 2 ++
target/hexagon/gen_trans_funcs.py | 6 ++++++
target/hexagon/insn.h | 1 +
target/hexagon/mmvec/decode_ext_mmvec.c | 2 ++
4 files changed, 11 insertions(+)
diff --git a/target/hexagon/decode.c b/target/hexagon/decode.c
index 4595e30384..a4d8500fea 100644
--- a/target/hexagon/decode.c
+++ b/target/hexagon/decode.c
@@ -184,6 +184,8 @@ decode_fill_newvalue_regno(Packet *packet)
/* Now patch up the consumer with the register number */
dst_idx = dststr - opcode_reginfo[def_opcode];
+ g_assert(packet->insn[def_idx].dest_idx != -1 &&
+ packet->insn[def_idx].dest_idx == dst_idx);
packet->insn[i].regno[use_regidx] =
packet->insn[def_idx].regno[dst_idx];
/*
diff --git a/target/hexagon/gen_trans_funcs.py b/target/hexagon/gen_trans_funcs.py
index 8acecdb993..1201172dda 100755
--- a/target/hexagon/gen_trans_funcs.py
+++ b/target/hexagon/gen_trans_funcs.py
@@ -69,6 +69,7 @@ def mark_which_imm_extended(f, tag):
## insn->regno[1] = args->Rs;
## insn->regno[2] = args->Rt;
## insn->new_read_idx = -1;
+## insn->dest_idx = 0;
## return true;
## }
##
@@ -86,6 +87,7 @@ def gen_trans_funcs(f):
"""))
new_read_idx = -1
+ dest_idx = -1
for regno, (reg_type, reg_id, *_) in enumerate(regs):
reg = hex_common.get_register(tag, reg_type, reg_id)
f.write(code_fmt(f"""\
@@ -93,6 +95,9 @@ def gen_trans_funcs(f):
"""))
if reg.is_read() and reg.is_new():
new_read_idx = regno
+ # dest_idx should be the first destination, so check for -1
+ if reg.is_written() and dest_idx == -1:
+ dest_idx = regno
if len(imms) != 0:
mark_which_imm_extended(f, tag)
@@ -115,6 +120,7 @@ def gen_trans_funcs(f):
f.write(code_fmt(f"""\
insn->new_read_idx = {new_read_idx};
+ insn->dest_idx = {dest_idx};
"""))
f.write(textwrap.dedent(f"""\
return true;
diff --git a/target/hexagon/insn.h b/target/hexagon/insn.h
index 36502bf056..a770379958 100644
--- a/target/hexagon/insn.h
+++ b/target/hexagon/insn.h
@@ -40,6 +40,7 @@ struct Instruction {
uint32_t which_extended:1; /* If has an extender, which immediate */
uint32_t new_value_producer_slot:4;
int32_t new_read_idx;
+ int32_t dest_idx;
bool part1; /*
* cmp-jumps are split into two insns.
diff --git a/target/hexagon/mmvec/decode_ext_mmvec.c b/target/hexagon/mmvec/decode_ext_mmvec.c
index e9007f5d71..c1320406df 100644
--- a/target/hexagon/mmvec/decode_ext_mmvec.c
+++ b/target/hexagon/mmvec/decode_ext_mmvec.c
@@ -86,6 +86,8 @@ check_new_value(Packet *pkt)
/* still not there, we have a bad packet */
g_assert_not_reached();
}
+ g_assert(pkt->insn[def_idx].dest_idx != -1 &&
+ pkt->insn[def_idx].dest_idx == dststr - reginfo);
int def_regnum = pkt->insn[def_idx].regno[dststr - reginfo];
/* Now patch up the consumer with the register number */
pkt->insn[i].regno[use_regidx] = def_regnum ^ def_oreg;
--
2.25.1
next prev parent reply other threads:[~2024-05-06 2:43 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-06 2:42 [PULL 00/15] Hexagon: simplify gen for packets w/o read-after-write Brian Cain
2024-05-06 2:42 ` [PULL 01/15] Hexagon (target/hexagon) Analyze reads before writes Brian Cain
2024-05-06 2:42 ` [PULL 02/15] Hexagon (target/hexagon) Enable more short-circuit packets (scalar core) Brian Cain
2024-05-06 2:42 ` [PULL 03/15] Hexagon (target/hexagon) Enable more short-circuit packets (HVX) Brian Cain
2024-05-06 2:42 ` [PULL 04/15] Hexagon (target/hexagon) Pass P0 explicitly to helpers that need it Brian Cain
2024-05-06 2:42 ` [PULL 05/15] Hexagon (target/hexagon) Pass SP " Brian Cain
2024-05-06 2:42 ` [PULL 06/15] Hexagon (target/hexagon) Only pass env to generated helper when needed Brian Cain
2024-05-06 2:42 ` [PULL 07/15] Hexagon (target/hexagon) Add is_old/is_new to Register class Brian Cain
2024-05-06 2:42 ` [PULL 08/15] Hexagon (target/hexagon) Mark new_read_idx in trans functions Brian Cain
2024-05-06 2:42 ` Brian Cain [this message]
2024-05-06 2:42 ` [PULL 10/15] Hexagon (target/hexagon) Mark has_pred_dest " Brian Cain
2024-05-06 2:42 ` [PULL 11/15] Hexagon (tests/tcg/hexagon) Test HVX .new read from high half of pair Brian Cain
2024-05-06 2:42 ` [PULL 12/15] Hexagon (target/hexagon) Remove uses of op_regs_generated.h.inc Brian Cain
2024-05-06 2:42 ` [PULL 13/15] Hexagon (target/hexagon) Remove gen_op_regs.py Brian Cain
2024-05-06 2:42 ` [PULL 14/15] Hexagon (target/hexagon) Remove gen_shortcode.py Brian Cain
2024-05-06 2:42 ` [PULL 15/15] Hexagon (target/hexagon) Remove hex_common.read_attribs_file Brian Cain
2024-05-06 17:17 ` [PULL 00/15] Hexagon: simplify gen for packets w/o read-after-write Richard Henderson
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