| Age | Commit message (Collapse) | Author |
|---|
|
The code previously filters out VAES-only instructions, this CL added
them back.
This CL added the VAES feature check following the Intel xed data:
XED_ISA_SET_VAES: vaes.7.0.ecx.9 # avx.1.0.ecx.28
This CL also found out that the old AVX512VAES feature check is not
checking the correct bits, it also fixes it:
XED_ISA_SET_AVX512_VAES_128: vaes.7.0.ecx.9 aes.1.0.ecx.25 avx512f.7.0.ebx.16 avx512vl.7.0.ebx.31
XED_ISA_SET_AVX512_VAES_256: vaes.7.0.ecx.9 aes.1.0.ecx.25 avx512f.7.0.ebx.16 avx512vl.7.0.ebx.31
XED_ISA_SET_AVX512_VAES_512: vaes.7.0.ecx.9 aes.1.0.ecx.25 avx512f.7.0.ebx.16
It restricts to the most strict common set - includes avx512vl for even
512-bits although it doesn't requires it.
Change-Id: I4e2f72b312fd2411589fbc12f9ee5c63c09c2e9a
Reviewed-on: https://go-review.googlesource.com/c/go/+/738500
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
|
|
Currently, all FMA operations are marked as requiring AVX512, even on
smaller vector widths. This is happening because the narrower FMA
operations are marked as extension "FMA" in the XED. Since this
extension doesn't start with "AVX", we filter them out very early in
the XED process. However, this is just a quirk of naming: the FMA
feature depends on the AVX feature, so it is part of AVX, even if it
doesn't say so on the tin.
Fix this by accepting the FMA extension and adding FMA to the table of
CPU features. We also tweak internal/cpu slightly do it correctly
enforces that the logical FMA feature depends on both the FMA and AVX
CPUID flags.
This actually *deletes* a lot of generated code because we no longer
need the AVX-512 encoding of these 128- and 256-bit operations.
Change-Id: I744a18d0be888f536ac034fe88b110347622be7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/736160
Auto-Submit: Austin Clements <austin@google.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/736201
Reviewed-by: Austin Clements <austin@google.com>
|
|
This simplifies our handling of XED features, adds a table of which
features imply which other features, and adds this information to the
documentation of the CPU features APIs.
As part of this we fix an issue around the "AVXAES" feature. AVXAES is
defined as the combination of the AVX and AES CPUID flags. Several
other features also work like this, but have hand-written logic in
internal/cpu to compute logical feature flags from the underlying
CPUID bits. For these, we expose a single feature check function from
the SIMD API.
AVXAES currently doesn't work like this: it requires the user to check
both features. However, this forces the SIMD API to expose an "AES"
feature check, which really has nothing to do with SIMD. To make this
consistent, we introduce an AVXAES feature check function and use it
in feature requirement docs. Unlike the others combo features, this is
implemented in the simd package, but the difference is invisible to
the user.
Change-Id: I2985ebd361f0ecd45fd428903efe4c981a5ec65d
Reviewed-on: https://go-review.googlesource.com/c/go/+/736100
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
Reviewed-on: https://go-review.googlesource.com/c/go/+/736200
Reviewed-by: Austin Clements <austin@google.com>
|
|
Correct the generate command for test helpers. There is no longer
a genfiles.go. Also correct the generated file headers to match
the current generator layout.
Change-Id: Ifb9a8c394477359020ff44290dbaabe7a2d59aca
Reviewed-on: https://go-review.googlesource.com/c/go/+/732280
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: David Chase <drchase@google.com>
|
|
Also removes a few leftover TODOs and scraps of commented-out code
from simd development.
Updated etetest.sh to make it behave whether amd64 implies the
experiment, or not.
Fixes #76473.
Change-Id: I6d9792214d7f514cb90c21b101dbf7d07c1d0e55
Reviewed-on: https://go-review.googlesource.com/c/go/+/728220
TryBot-Bypass: David Chase <drchase@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
|
