tree 9b5145985888cd3a41dde5fa0dc9c95e1948f010
parent 80fd97208db0a6f1c2dccfc63ccde57b4e994875
author Garrett Bodley <garrett.bodley@gmail.com> 1719269788 -0400
committer Gopher Robot <gobot@golang.org> 1721154297 +0000

sha3: Avo port of keccakf_amd64.s

This implementation utilizes the same registers found in the reference
implementation, aiming to produce a minimal semantic diff between the
Avo-generated output and the original hand-written assembly.

To verify the Avo implementation, the reference and Avo-generated
assembly files are fed to `go tool asm`, capturing the debug output into
corresponding temp files. The debug output contains supplementary
metadata (line numbers, instruction offsets, and source file references)
that must be removed in order to obtain a semantic diff of the two
files. This is accomplished via a small utility script written in awk.

Commands used to verify Avo output:

BASE="d66d9c31b4ae80d173d1187a9e40c188788dbdbc"
go tool asm -o /dev/null -debug \
  <(git cat-file -p "$BASE":sha3/keccakf_amd64.s) \
  > /tmp/reference.s

go tool asm -o /dev/null -debug \
  sha3/keccakf_amd64.s \
  > /tmp/avo.s

normalize(){
  awk '{
    $1=$2=$3="";
    print substr($0,4)
  }'
}

diff <(normalize < /tmp/reference.s) <(normalize < /tmp/avo.s)

Change-Id: I1c0ea516531355263b83d3b66a37df090e293cea
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/594655
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Russell Webb <russell.webb@protonmail.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Filippo Valsorda <filippo@golang.org>