build: build failure on x/crypto GOARCH=loong64 with Go 1.23/1.24 [consistent failure]

[gopherbot]

#!watchflakes
default <- (builder ~ `misccompile` && repo == "crypto" && mode == "build" && log ~ `loong64`) || (pkg ~ `golang.org/x/crypto/` && goarch == "loong64" && (`build failed` || `unrecognized instruction`))

Issue created automatically to collect these failures.

Example (log):

[W2025-04-11T13:55:44.015014-07:00 2336 0 json_subtract.go:121] Unknown fields while parsing property namespace "": {"coord_mode":{"builders_to_trigger_after_toolchain_build":[]}, "env":{}, "is_google":true}
2025/04/11 13:55:44 run starting
2025/04/11 13:55:45 installed tools
[E2025-04-11T14:01:12.981097-07:00 2336 0 errors.go:128] set status: FAILURE: shard 1: failed to run test golang.org/x/crypto module for goos:"linux"  goarch:"loong64": exit status 1
  with SummaryMarkdown:
* go on release-branch.go1.23 ([commit 96537d5](https://go.googlesource.com/go/+/96537d504423f332bfa2e8335a936a041c46206c)) / crypto on master ([commit 2ebaafc](https://go.googlesource.com/crypto/+/2ebaafcdf5677d2f056d0e8b9a8695e58d4feea7))

Error: `shard 1: failed to run test golang.org/x/crypto module for goos:"linux"  goarch:"loong64": exit status 1`

Additional links for debugging:
* [test golang.org/x/crypto module for goos:"linux"  goarch:"loong64" output [shard 1]](https://logs.chromium.org/logs/golang/buildbucket/cr-buildbucket/8717852551747425281/+/u/step/52/log/2)
* [Shard 1 encountered a non-build/non-test failure, click here for the shard's build page](https://ci.chromium.org/b/8717852551747425281)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- builder == "x_crypto-go1.23-linux-amd64-misccompile" && repo == "crypto" && mode == "build"

2025-04-11 20:55 x_crypto-go1.23-linux-amd64-misccompile crypto@2ebaafcd release-branch.go1.23@96537d50 [build] (log)

[W2025-04-11T13:55:44.015014-07:00 2336 0 json_subtract.go:121] Unknown fields while parsing property namespace "": {"coord_mode":{"builders_to_trigger_after_toolchain_build":[]}, "env":{}, "is_google":true}
2025/04/11 13:55:44 run starting
2025/04/11 13:55:45 installed tools
[E2025-04-11T14:01:12.981097-07:00 2336 0 errors.go:128] set status: FAILURE: shard 1: failed to run test golang.org/x/crypto module for goos:"linux"  goarch:"loong64": exit status 1
  with SummaryMarkdown:
* go on release-branch.go1.23 ([commit 96537d5](https://go.googlesource.com/go/+/96537d504423f332bfa2e8335a936a041c46206c)) / crypto on master ([commit 2ebaafc](https://go.googlesource.com/crypto/+/2ebaafcdf5677d2f056d0e8b9a8695e58d4feea7))

Error: `shard 1: failed to run test golang.org/x/crypto module for goos:"linux"  goarch:"loong64": exit status 1`

Additional links for debugging:
* [test golang.org/x/crypto module for goos:"linux"  goarch:"loong64" output [shard 1]](https://logs.chromium.org/logs/golang/buildbucket/cr-buildbucket/8717852551747425281/+/u/step/52/log/2)
* [Shard 1 encountered a non-build/non-test failure, click here for the shard's build page](https://ci.chromium.org/b/8717852551747425281)

2025-04-11 20:55 x_crypto-go1.23-linux-amd64-misccompile crypto@18f77073 release-branch.go1.23@96537d50 [build] (log)

[W2025-04-11T13:55:42.336167-07:00 22441 0 json_subtract.go:121] Unknown fields while parsing property namespace "": {"coord_mode":{"builders_to_trigger_after_toolchain_build":[]}, "env":{}, "is_google":true}
2025/04/11 13:55:42 run starting
2025/04/11 13:55:42 installed tools
[E2025-04-11T13:59:09.413108-07:00 22441 0 errors.go:128] set status: FAILURE: shard 2: failed to run test golang.org/x/crypto module for goos:"linux"  goarch:"loong64": exit status 1
  with SummaryMarkdown:
* go on release-branch.go1.23 ([commit 96537d5](https://go.googlesource.com/go/+/96537d504423f332bfa2e8335a936a041c46206c)) / crypto on master ([commit 18f7707](https://go.googlesource.com/crypto/+/18f770732fa01d5d5e1a529a5518d7b70f93d3c6))

Error: `shard 2: failed to run test golang.org/x/crypto module for goos:"linux"  goarch:"loong64": exit status 1`

Additional links for debugging:
* [test golang.org/x/crypto module for goos:"linux"  goarch:"loong64" output [shard 2]](https://logs.chromium.org/logs/golang/buildbucket/cr-buildbucket/8717852554750815473/+/u/step/53/log/2)
* [Shard 2 encountered a non-build/non-test failure, click here for the shard's build page](https://ci.chromium.org/b/8717852554750815473)

2025-04-14 03:23 x_crypto-go1.23-linux-amd64-misccompile crypto@953e8095 release-branch.go1.23@96537d50 [build] (log)

[W2025-04-13T20:25:52.973623-07:00 2270 0 json_subtract.go:121] Unknown fields while parsing property namespace "": {"coord_mode":{"builders_to_trigger_after_toolchain_build":[]}, "env":{}, "is_google":true}
2025/04/13 20:25:52 run starting
2025/04/13 20:25:54 installed tools
[E2025-04-13T20:34:42.443232-07:00 2270 0 errors.go:128] set status: FAILURE: shard 1: failed to run test golang.org/x/crypto module for goos:"linux"  goarch:"loong64": exit status 1
  with SummaryMarkdown:
* go on release-branch.go1.23 ([commit 96537d5](https://go.googlesource.com/go/+/96537d504423f332bfa2e8335a936a041c46206c)) / crypto on master ([commit 953e809](https://go.googlesource.com/crypto/+/953e8095893cd9efe44a90fd07ed3cfc87bfc109))

Error: `shard 1: failed to run test golang.org/x/crypto module for goos:"linux"  goarch:"loong64": exit status 1`

Additional links for debugging:
* [test golang.org/x/crypto module for goos:"linux"  goarch:"loong64" output [shard 1]](https://logs.chromium.org/logs/golang/buildbucket/cr-buildbucket/8717646810952208193/+/u/step/53/log/2)
* [Shard 1 encountered a non-build/non-test failure, click here for the shard's build page](https://ci.chromium.org/b/8717646810952208193)

2025-04-14 03:23 x_crypto-go1.23-linux-amd64-misccompile crypto@388684e5 release-branch.go1.23@96537d50 [build] (log)

[W2025-04-13T20:25:53.091184-07:00 2274 0 json_subtract.go:121] Unknown fields while parsing property namespace "": {"coord_mode":{"builders_to_trigger_after_toolchain_build":[]}, "env":{}, "is_google":true}
2025/04/13 20:25:53 run starting
2025/04/13 20:25:54 installed tools
[E2025-04-13T20:34:42.296398-07:00 2274 0 errors.go:128] set status: FAILURE: shard 1: failed to run test golang.org/x/crypto module for goos:"linux"  goarch:"loong64": exit status 1
  with SummaryMarkdown:
* go on release-branch.go1.23 ([commit 96537d5](https://go.googlesource.com/go/+/96537d504423f332bfa2e8335a936a041c46206c)) / crypto on master ([commit 388684e](https://go.googlesource.com/crypto/+/388684e50b26e51e1428afcacb811c0732c45c01))

Error: `shard 1: failed to run test golang.org/x/crypto module for goos:"linux"  goarch:"loong64": exit status 1`

Additional links for debugging:
* [test golang.org/x/crypto module for goos:"linux"  goarch:"loong64" output [shard 1]](https://logs.chromium.org/logs/golang/buildbucket/cr-buildbucket/8717646811005623313/+/u/step/53/log/2)
* [Shard 1 encountered a non-build/non-test failure, click here for the shard's build page](https://ci.chromium.org/b/8717646811005623313)

— watchflakes

[prattmic]

cc @golang/loong64 https://go.dev/cl/661215 broke the x/crypto build on 1.23 and 1.24. I assume those instructions are newly added at tip? In which case the assembly implementation should be behind a go1.25 build tag.