qbit/go
1
0
Fork 0
mirror of https://github.com/golang/go synced 2024-11-23 04:10:04 -07:00
Code Releases Activity

cmd/asm,cmd/internal/obj/x86: add RDPID instruction to x86 assembler

Browse Source 
Add support for the Read Processor ID (RDPID) instruction to the x86
assembler. This returns the current logical processor's ID in the
specified register, as a faster alternative to RDTSCP.

Fixes #56525

Change-Id: I43482e42431dfc385ce2e7f6d44b9746b0cc4548
Reviewed-on: https://go-review.googlesource.com/c/go/+/482955
Run-TryBot: Joel Sing <joel@sing.id.au>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
This commit is contained in:
Joel Sing 2023-04-07 06:15:59 +10:00
parent 0d82f584c2
commit 05cd6cbb98
7 changed files with 15 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
src/cmd/asm/internal/asm/testdata/386enc.s vendored
View File

@ -33,5 +33,8 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
PUSHL FS // 0fa0
POPL FS // 0fa1
POPL SS // 17
RDPID AX // f30fc7f8
// End of tests.
RET

4
src/cmd/asm/internal/asm/testdata/amd64enc_extra.s vendored
View File

@ -1055,5 +1055,9 @@ TEXT asmtest(SB),DUPOK|NOSPLIT,$0
TPAUSE BX // 660faef3
UMONITOR BX // f30faef3
UMWAIT BX // f20faef3
RDPID DX // f30fc7fa
RDPID R11 // f3410fc7fb
// End of tests.
RET

3
src/cmd/asm/internal/asm/testdata/amd64error.s vendored
View File

@ -144,4 +144,7 @@ TEXT errors(SB),$0
VMOVDQA32.Z Z0, Z1 // ERROR "mask register must be specified for .Z instructions"
VMOVDQA32.Z Z0, K0, Z1 // ERROR "invalid instruction"
VMOVDQA32.Z Z0, K1, Z1 // ok
RDPID (BX) // ERROR "invalid instruction"
RET

1
src/cmd/internal/obj/x86/aenum.go
View File

@ -747,6 +747,7 @@ const (
ARDGSBASEL
ARDGSBASEQ
ARDMSR
ARDPID
ARDPKRU
ARDPMC
ARDRANDL

1
src/cmd/internal/obj/x86/anames.go
View File

@ -745,6 +745,7 @@ var Anames = []string{
"RDGSBASEL",
"RDGSBASEQ",
"RDMSR",
"RDPID",
"RDPKRU",
"RDPMC",
"RDRANDL",

3
src/cmd/internal/obj/x86/asm6.go
View File

@ -775,7 +775,7 @@ var ymshufb = []ytab{
}
// It should never have more than 1 entry,
// because some optab entries you opcode secuences that
// because some optab entries have opcode sequences that
// are longer than 2 bytes (zoffset=2 here),
// ROUNDPD and ROUNDPS and recently added BLENDPD,
// to name a few.
@ -1774,6 +1774,7 @@ var optab =
{ALSSW, ym_rl, Pe, opBytes{0x0f, 0xb2}},
{ALSSL, ym_rl, Px, opBytes{0x0f, 0xb2}},
{ALSSQ, ym_rl, Pw, opBytes{0x0f, 0xb2}},
{ARDPID, yrdrand, Pf3, opBytes{0xc7, 07}},
{ABLENDPD, yxshuf, Pq, opBytes{0x3a, 0x0d, 0}},
{ABLENDPS, yxshuf, Pq, opBytes{0x3a, 0x0c, 0}},

1
src/cmd/internal/obj/x86/obj6.go
View File

@ -1476,6 +1476,7 @@ var unaryDst = map[obj.As]bool{
ARDFSBASEQ: true,
ARDGSBASEL: true,
ARDGSBASEQ: true,
ARDPID: true,
ARDRANDL: true,
ARDRANDQ: true,
ARDRANDW: true,