Displaying 8 results from an estimated 8 matches for "xmm31".
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2017 Jul 19
5
error:Ran out of lanemask bits to represent subregisterr
...here.
Now i am getting following errors. which means registerinfo.inc file is not
generated successfully.
/PIM/lib/Target/X86/MCTargetDesc/X86BaseInfo.h:733:24: error:
no member named 'XMM8' in namespace 'llvm::X86'
if ((RegNo >= X86::XMM8 && RegNo <= X86::XMM31) ||
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
When i comment out the line to construct 65536 bit register in
registerinfo.td. it run fine.
What to do?
On Thu, Jul 20, 2017 at 2:36 AM, Krzysztof Parzyszek <
kparzysz at codeaurora.org> wrote:...
2016 Nov 23
4
RFC: code size reduction in X86 by replacing EVEX with VEX encoding
...FC for a proposed target specific X86 optimization for reducing code size in the encoding of AVX-512 instructions when possible.
When the AVX512F instruction set was introduced in X86 it included additional 32 registers of 512bit size each ZMM0 - ZMM31, as well as additional 16 XMM registers XMM16-XMM31 and 16 YMM registers YMM16-YMM31.
In order to encode the new registers of 16-31 and the additional instructions, a new encoding prefix called EVEX, which extends the existing VEX encoding, was introduced as shown below:
The EVEX encoding format:
EVEX Opcode ModR/M [SIB] [Disp32] / [Dis...
2017 Jul 28
3
Purpose of various register classes in X86 target
Hello Matthias,
On 28 July 2017 at 04:13, Matthias Braun <mbraun at apple.com> wrote:
> It's not that hard in principle:
> - A register class is a set of registers.
> - Virtual Registers have a register class assigned.
> - If you have register constraints (like x86 8bit operations only work on
> al,ah,etc.) then you have to create a new register class to express that.
2017 Jul 20
2
error:Ran out of lanemask bits to represent subregisterr
...file is not generated successfully.
>>
>> /PIM/lib/Target/X86/MCTargetDesc/X86BaseInfo.h:733:24: error:
>> no member named 'XMM8' in namespace 'llvm::X86'
>> if ((RegNo >= X86::XMM8 && RegNo <= X86::XMM31) ||
>>
>>
>> fatal error: too many errors emitted, stopping now
>> [-ferror-limit=]
>> 20 errors generated.
>>
>> When i comment out the line to construct 65536 bit register in
>> registerinfo.td <http://registerinfo...
2016 Nov 23
2
RFC: code size reduction in X86 by replacing EVEX with VEX encoding
...X86 optimization for
> reducing code size in the encoding of AVX-512 instructions when possible.
>
>
>
> When the AVX512F instruction set was introduced in X86 it included
> additional 32 registers of 512bit size each ZMM0 - ZMM31, as well as
> additional 16 XMM registers XMM16-XMM31 and 16 YMM registers YMM16-YMM31.
>
> In order to encode the new registers of 16-31 and the additional
> instructions, a new encoding prefix called EVEX, which extends the
> existing VEX encoding, was introduced as shown below:
>
>
>
> The EVEX encoding format:
>
>...
2016 Nov 24
3
RFC: code size reduction in X86 by replacing EVEX with VEX encoding
...FC for a proposed target specific X86 optimization for reducing code size in the encoding of AVX-512 instructions when possible.
When the AVX512F instruction set was introduced in X86 it included additional 32 registers of 512bit size each ZMM0 - ZMM31, as well as additional 16 XMM registers XMM16-XMM31 and 16 YMM registers YMM16-YMM31.
In order to encode the new registers of 16-31 and the additional instructions, a new encoding prefix called EVEX, which extends the existing VEX encoding, was introduced as shown below:
The EVEX encoding format:
EVEX Opcode ModR/M [SIB] [Disp32] / [Dis...
2017 Jul 19
2
error:Ran out of lanemask bits to represent subregisterr
What about the static asserts protecting a Log call and another in the
parser?
On Wed, Jul 19, 2017 at 2:26 PM Krzysztof Parzyszek <kparzysz at codeaurora.org>
wrote:
> On 7/19/2017 4:18 PM, Craig Topper wrote:
> > LaneMask isn't as self contained as it should be. 64 bits is enough
> > here. The problem is accidental leaking of the current size.
> >
> > For
2016 Nov 28
2
RFC: code size reduction in X86 by replacing EVEX with VEX encoding
...FC for a proposed target specific X86 optimization for reducing code size in the encoding of AVX-512 instructions when possible.
When the AVX512F instruction set was introduced in X86 it included additional 32 registers of 512bit size each ZMM0 - ZMM31, as well as additional 16 XMM registers XMM16-XMM31 and 16 YMM registers YMM16-YMM31.
In order to encode the new registers of 16-31 and the additional instructions, a new encoding prefix called EVEX, which extends the existing VEX encoding, was introduced as shown below:
The EVEX encoding format:
EVEX Opcode ModR/M [SIB] [Disp32] / [Dis...