tests: add big-endian conversion tests (#30705)

* ci: add quantize to big-endian tests

Signed-off-by: Aaron Teo <aaron.teo1@ibm.com>

* ci: remove incoherent data types from testing

Signed-off-by: Aaron Teo <aaron.teo1@ibm.com>

* tests: add verified hashes

Signed-off-by: Aaron Teo <aaron.teo1@ibm.com>

* tests: rename

Signed-off-by: Aaron Teo <aaron.teo1@ibm.com>

* tests: add result table

Signed-off-by: Aaron Teo <aaron.teo1@ibm.com>

* tests: swap hash and result column, add colours

Signed-off-by: Aaron Teo <aaron.teo1@ibm.com>

* tests: switch to perplexity test

Signed-off-by: Aaron Teo <aaron.teo1@ibm.com>

* tests: update output table

Signed-off-by: Aaron Teo <aaron.teo1@ibm.com>

---------

Signed-off-by: Aaron Teo <aaron.teo1@ibm.com>

.github/workflows/build-ibm.yml

@@ -20,7 +20,11 @@ on:
     paths: [
       '.github/workflows/build-ibm.yml',
       'ggml/src/ggml-cpu/**',
-      'ggml/src/ggml-zdnn/**'
+      'ggml/src/ggml-zdnn/**',
+      'ggml/src/ggml-quants.c',
+      'src/llama-quant.cpp',
+      'gguf-py/gguf/scripts/gguf_convert_endian.py',
+      'tests/test-quantize-be.sh'
     ]
 
 cache-mode: none
@@ -105,6 +109,11 @@ jobs:
           wget https://huggingface.co/ggml-org/models/resolve/main/tinyllamas/stories260K-be.gguf
           ./bin/llama-completion -m stories260K-be.gguf -p "One day, Lily met a Shoggoth" -n 500 -c 256
 
+      - name: Test quantize (s390x)
+        id: quantize_test_s390x
+        run: |
+          ./tests/test-quantize-be.sh ./build/bin/llama-quantize ./build/bin/llama-perplexity 2>&1
+
   ubuntu-26-zdnn-s390x:
     name: ubuntu-26-zdnn-s390x
     runs-on: ubuntu-24.04-s390x