[go] cmd/internal/obj/s390x: add VLER, VSTER, VLLEZ instructions

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Keith Randall (Gerrit)

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Aug 10, 2026, 4:33:19 PM (13 hours ago) Aug 10

to Keith Randall, Kiran M Vijay IBM, goph...@pubsubhelper.golang.org, golang-...@googlegroups.com, Mark Freeman, golang...@luci-project-accounts.iam.gserviceaccount.com, Ian Lance Taylor, Keith Randall, Vishwanatha HD, Srinivas Pokala, Gopher Robot, Cherry Mui, golang-co...@googlegroups.com

Keith Randall submitted the change

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3 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.

Change information

Commit message:

cmd/internal/obj/s390x: add VLER, VSTER, VLLEZ instructions

This change will add the below instructions into the Go asm for s390x architecture.

VLER (Vector Load Elements Reversed) -> Z15+ (Vector-Enhancements Facility 2)
VSTER (Vector Store Elements Reversed) -> Z15+ (Vector-Enhancements Facility 2)
VLLEZ (Vector Load Logical Element and Zero) -> Z13+ (Vector Facility for z/Architecture)

An upcoming PR of crypto/internal/fips140/bigmod/nat_s390x.s will use them
for performance improvement.

Change-Id: I2ee154916d79047f662d2ad6d27744e53b84c667

Reviewed-on: https://go-review.googlesource.com/c/go/+/794240

Reviewed-by: Srinivas Pokala <Pokala....@ibm.com>

Reviewed-by: Mark Freeman <markf...@google.com>

Reviewed-by: Vishwanatha HD <vishwan...@ibm.com>

LUCI-TryBot-Result: golang...@luci-project-accounts.iam.gserviceaccount.com <golang...@luci-project-accounts.iam.gserviceaccount.com>

Reviewed-by: Keith Randall <k...@golang.org>

Reviewed-by: Keith Randall <k...@google.com>

Files:

M src/cmd/asm/internal/asm/testdata/s390x.s
M src/cmd/internal/obj/s390x/a.out.go
M src/cmd/internal/obj/s390x/anames.go
M src/cmd/internal/obj/s390x/asmz.go
M src/cmd/internal/obj/s390x/vector.go

Change size: S

Delta: 5 files changed, 49 insertions(+), 0 deletions(-)

Branch: refs/heads/master

Submit Requirements:

Code-Review: +1 by Keith Randall, +1 by Mark Freeman, +2 by Keith Randall, +1 by Srinivas Pokala, +1 by Vishwanatha HD
TryBots-Pass: LUCI-TryBot-Result+1 by golang...@luci-project-accounts.iam.gserviceaccount.com

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