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List: binutils-cvs
Subject: [binutils-gdb] x86: Support VEX base opcode length > 1
From: "H.J. Lu via Binutils-cvs" <binutils-cvs () sourceware ! org>
Date: 2020-06-29 13:29:48
Message-ID: 20200629132948.6B2433892468 () sourceware ! org
[Download RAW message or body]
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=8c190ce03837391885bbba9055bea04d36077f9c
commit 8c190ce03837391885bbba9055bea04d36077f9c
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Mon Jun 29 06:28:31 2020 -0700
x86: Support VEX base opcode length > 1
Intel AMX instructions with 8-bit immediate opcode extension without
operands:
tilerelease, 0, 0x49c0, None, 2, CpuAMX_TILE|Cpu64, \
Vex|VexOpcode=1|No_bSuf|No_wSuf|No_lSuf|No_sSuf|No_qSuf|No_ldSuf, { 0 }
Update build_vex_prefix to support VEX base opcode length > 1.
* tc-i386.c (build_vex_prefix): Support VEX base opcode length > 1.
(md_assemble): Don't process ImmExt without operands.
Diff:
---
gas/ChangeLog | 5 +++++
gas/config/tc-i386.c | 8 ++------
2 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/gas/ChangeLog b/gas/ChangeLog
index fdec78bfa22..e3e1c4749f9 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,8 @@
+2020-06-29 H.J. Lu <hongjiu.lu@intel.com>
+
+ * tc-i386.c (build_vex_prefix): Support VEX base opcode length > 1.
+ (md_assemble): Don't process ImmExt without operands.
+
2020-06-29 Hans-Peter Nilsson <hp@bitrange.com>
PR gas/25331
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index ae2a2c1a536..be894782a45 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -3664,7 +3664,7 @@ build_vex_prefix (const insn_template *t)
}
}
- switch ((i.tm.base_opcode >> 8) & 0xff)
+ switch ((i.tm.base_opcode >> (i.tm.opcode_length << 3)) & 0xff)
{
case 0:
implied_prefix = 0;
@@ -4873,12 +4873,8 @@ md_assemble (char *line)
if (!process_operands ())
return;
}
- else
+ else if (!quiet_warnings && i.tm.opcode_modifier.ugh)
{
- if (i.tm.opcode_modifier.immext)
- process_immext ();
-
- if (!quiet_warnings && i.tm.opcode_modifier.ugh)
/* UnixWare fsub no args is alias for fsubp, fadd -> faddp, etc. */
as_warn (_("translating to `%sp'"), i.tm.name);
}
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