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Re: [PATCH] Enable Intel RDPID instruction.
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: Alexander Fomin <afomin dot mailbox at gmail dot com>
- Cc: Binutils <binutils at sourceware dot org>
- Date: Tue, 3 May 2016 07:54:51 -0700
- Subject: Re: [PATCH] Enable Intel RDPID instruction.
- Authentication-results: sourceware.org; auth=none
- References: <20160503102646 dot GA26920 at msticlxl57 dot ims dot intel dot com> <CAMe9rOo4sCy3b3ttNi+K2Nrz6+4OxiHKaMhOCnZ9ejPxi3PDTg at mail dot gmail dot com>
On Tue, May 3, 2016 at 5:05 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
> On Tue, May 3, 2016 at 3:26 AM, Alexander Fomin
> <afomin.mailbox@gmail.com> wrote:
>> Hi,
>> This patch enables Intel RDPID instruction.
>>
>> Please refer to Intel SDM Vol. 2 (r58) for details about the instruction
>> and corresponding CPUID.
>>
>> I've eliminated i386-init.h and i386-tbl.h from the patch as they were
>> just regenerated.
>>
>> Any objectionis?
>>
>> Alexander
>> ---
>> gas/
>>
>> * doc/c-i386.texi: Document RDPID.
>>
>> gas/testsuite/
>>
>> * gas/i386/i386.exp: Add RDPID tests.
>> * gas/i386/prefix.d: Adjust.
>> * gas/i386/rdpid.s: New test.
>> * gas/i386/rdpid.d: Ditto.
>> * gas/i386/rdpid-intel.d: Ditto.
>> * gas/i386/x86-64-rdpid.s: Ditto.
>> * gas/i386/x86-64-rdpid.d: Ditto.
>> * gas/i386/x86-64-rdpid-intel.d: Ditto.
>>
>> opcodes/
>>
>> * i386-dis.c (prefix_table): Add RDPID instruction.
>> * i386-gen.c (cpu_flag_init): Add RDPID flag.
>> (cpu_flags): Add RDPID bitfield.
>> * i386-opc.h (enum): Add RDPID element.
>> (i386_cpu_flags): Add RDPID field.
>> * i386-opc.tbl: Add RDPID instruction.
>> * i386-init.h: Regenerate.
>> * i386-tbl.h: Regenerate.
>> ---
>> gas/doc/c-i386.texi | 3 +-
>> gas/testsuite/gas/i386/i386.exp | 4 +
>> gas/testsuite/gas/i386/prefix.d | 3 +-
>> gas/testsuite/gas/i386/rdpid-intel.d | 11 +
>> gas/testsuite/gas/i386/rdpid.d | 11 +
>> gas/testsuite/gas/i386/rdpid.s | 5 +
>> gas/testsuite/gas/i386/x86-64-rdpid-intel.d | 11 +
>> gas/testsuite/gas/i386/x86-64-rdpid.d | 11 +
>> gas/testsuite/gas/i386/x86-64-rdpid.s | 5 +
>> opcodes/i386-dis.c | 2 +-
>> opcodes/i386-gen.c | 3 +
>> opcodes/i386-init.h | 223 +-
>> opcodes/i386-opc.h | 3 +
>> opcodes/i386-opc.tbl | 7 +
>> opcodes/i386-tbl.h | 10791 +++++++++++++-------------
>> 15 files changed, 5656 insertions(+), 5437 deletions(-)
>> create mode 100644 gas/testsuite/gas/i386/rdpid-intel.d
>> create mode 100644 gas/testsuite/gas/i386/rdpid.d
>> create mode 100644 gas/testsuite/gas/i386/rdpid.s
>> create mode 100644 gas/testsuite/gas/i386/x86-64-rdpid-intel.d
>> create mode 100644 gas/testsuite/gas/i386/x86-64-rdpid.d
>> create mode 100644 gas/testsuite/gas/i386/x86-64-rdpid.s
>>
>> diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi
>> index adbcb99..edd187b 100644
>> --- a/gas/doc/c-i386.texi
>> +++ b/gas/doc/c-i386.texi
>> @@ -153,6 +153,7 @@ accept various extension mnemonics. For example,
>> @code{smap},
>> @code{mpx},
>> @code{sha},
>> +@code{rdpid},
>> @code{prefetchwt1},
>> @code{clflushopt},
>> @code{se1},
>> @@ -1173,7 +1174,7 @@ supported on the CPU specified. The choices for @var{cpu_type} are:
>> @item @samp{.3dnow} @tab @samp{.3dnowa} @tab @samp{.sse4a} @tab @samp{.sse5}
>> @item @samp{.syscall} @tab @samp{.rdtscp} @tab @samp{.svme} @tab @samp{.abm}
>> @item @samp{.lwp} @tab @samp{.fma4} @tab @samp{.xop} @tab @samp{.cx16}
>> -@item @samp{.padlock} @tab @samp{.clzero} @tab @samp{.mwaitx}
>> +@item @samp{.padlock} @tab @samp{.clzero} @tab @samp{.mwaitx} @tab @samp{.rdpid}
>> @end multitable
>>
>> Apart from the warning, there are only two other effects on
>> diff --git a/gas/testsuite/gas/i386/i386.exp b/gas/testsuite/gas/i386/i386.exp
>> index 9c4fdea..df1518b 100644
>> --- a/gas/testsuite/gas/i386/i386.exp
>> +++ b/gas/testsuite/gas/i386/i386.exp
>> @@ -346,6 +346,8 @@ if [expr ([istarget "i*86-*-*"] || [istarget "x86_64-*-*"]) && [gas_32_check]]
>> run_dump_test "mwaitx-bdver4"
>> run_list_test "mwaitx-reg"
>> run_dump_test "ospke"
>> + run_dump_test "rdpid"
>> + run_dump_test "rdpid-intel"
>>
>> # These tests require support for 8 and 16 bit relocs,
>> # so we only run them for ELF and COFF targets.
>> @@ -737,6 +739,8 @@ if [expr ([istarget "i*86-*-*"] || [istarget "x86_64-*-*"]) && [gas_64_check]] t
>> run_dump_test "x86-64-mwaitx-bdver4"
>> run_list_test "x86-64-mwaitx-reg"
>> run_dump_test "x86-64-ospke"
>> + run_dump_test "x86-64-rdpid"
>> + run_dump_test "x86-64-rdpid-intel"
>> run_dump_test "x86-64-fence-as-lock-add-yes"
>> run_dump_test "x86-64-fence-as-lock-add-no"
>>
>> diff --git a/gas/testsuite/gas/i386/prefix.d b/gas/testsuite/gas/i386/prefix.d
>> index 7afb0c1..8dd200b 100644
>> --- a/gas/testsuite/gas/i386/prefix.d
>> +++ b/gas/testsuite/gas/i386/prefix.d
>> @@ -63,8 +63,7 @@ Disassembly of section .text:
>> [ ]*[a-f0-9]+: f3 f0 66 3e 36 90 lock data16 ds ss pause
>> [ ]*[a-f0-9]+: f3 f2 67 3e 36 90 repz repnz addr16 ds ss nop
>> [ ]*[a-f0-9]+: f3 67 f2 66 3e 36 90 repz addr16 repnz ds ss xchg %ax,%ax
>> -[ ]*[a-f0-9]+: f3 0f c7 \(bad\)
>> -[ ]*[a-f0-9]+: f8 clc
>> +[ ]*[a-f0-9]+: f3 0f c7 f8 rdpid %eax
>> [ ]*[a-f0-9]+: 90 nop
>> [ ]*[a-f0-9]+: f3 0f c7 \(bad\)
>> [ ]*[a-f0-9]+: f0 90 lock nop
>> diff --git a/gas/testsuite/gas/i386/rdpid-intel.d b/gas/testsuite/gas/i386/rdpid-intel.d
>> new file mode 100644
>> index 0000000..f733b17
>> --- /dev/null
>> +++ b/gas/testsuite/gas/i386/rdpid-intel.d
>> @@ -0,0 +1,11 @@
>> +#objdump: -dwMintel
>> +#name: i386 RDPID (Intel disassembly)
>> +#source: rdpid.s
>> +
>> +.*: +file format .*
>> +
>> +Disassembly of section .text:
>> +
>> +0+ <_start>:
>> +[ ]*[a-f0-9]+:[ ]*f3 0f c7 f8[ ]*rdpid eax
>> +#pass
>> diff --git a/gas/testsuite/gas/i386/rdpid.d b/gas/testsuite/gas/i386/rdpid.d
>> new file mode 100644
>> index 0000000..ef67c84
>> --- /dev/null
>> +++ b/gas/testsuite/gas/i386/rdpid.d
>> @@ -0,0 +1,11 @@
>> +#objdump: -dw
>> +#name: i386 RDPID insns
>> +
>> +.*: +file format .*
>> +
>> +
>> +Disassembly of section .text:
>> +
>> +0+ <_start>:
>> +[ ]*[a-f0-9]+:[ ]*f3 0f c7 f8[ ]*rdpid %eax
>> +#pass
>> diff --git a/gas/testsuite/gas/i386/rdpid.s b/gas/testsuite/gas/i386/rdpid.s
>> new file mode 100644
>> index 0000000..fe6e401
>> --- /dev/null
>> +++ b/gas/testsuite/gas/i386/rdpid.s
>> @@ -0,0 +1,5 @@
>> +# Check 32bit RDPID instructions.
>> +
>> + .text
>> +_start:
>> + rdpid %eax
>> diff --git a/gas/testsuite/gas/i386/x86-64-rdpid-intel.d b/gas/testsuite/gas/i386/x86-64-rdpid-intel.d
>> new file mode 100644
>> index 0000000..df695ca
>> --- /dev/null
>> +++ b/gas/testsuite/gas/i386/x86-64-rdpid-intel.d
>> @@ -0,0 +1,11 @@
>> +#objdump: -dwMintel
>> +#name: x86_64 RDPID (Intel disassembly)
>> +#source: x86-64-rdpid.s
>> +
>> +.*: +file format .*
>> +
>> +Disassembly of section .text:
>> +
>> +0+ <_start>:
>> +[ ]*[a-f0-9]+:[ ]*f3 48 0f c7 f8[ ]*rdpid rax
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> rdpid doesn't need the REX prefix.
Please add a testcase for %r10.
--
H.J.