test(rocjitsu): batch floating-point mode tests

emulation/rocjitsu/README.md

@@ -79,6 +79,29 @@ HIP kernel tests and RCCL daemon tests require an ROCm installation.
 They are disabled automatically when `hipcc` or `libhsa-runtime64` is
 not found.
 
+Floating-point mode tests run in 16 batches to share process startup and
+GoogleTest registration. Per-case fixtures and assertions are unchanged.
+Run all batches with:
+
+```bash
+ctest --test-dir build -L '^fp-mode$' --output-on-failure
+```
+
+Each batch writes per-case GoogleTest results under `build/tests/gtest-results/`.
+Installed tests use the same batches and write results under `gtest-results/`
+in the installed test directory. The launcher removes each batch's previous XML
+before starting GoogleTest to avoid stale results after a crash or timeout.
+Cleanup errors fail the batch before GoogleTest starts.
+If the launcher cannot start or finish cleanup, an older report may remain;
+use CTest's status alongside the XML.
+CTest batches ignore an inherited `GTEST_FILTER` and suppress passing-case output;
+failure diagnostics and per-case XML are retained. To select individual cases or
+a family, run the dedicated executable with a GoogleTest filter:
+
+```bash
+build/tests/rocjitsu_fp_mode_tests --gtest_filter='BinaryF32/ValuFpModeTest.*'
+```
+
 ## Running HIP workloads
 
 ```bash

emulation/rocjitsu/cmake/rj_run_gtest_shard.cmake

@@ -0,0 +1,32 @@
+# Copyright (c) 2026 Advanced Micro Devices, Inc.
+# SPDX-License-Identifier: MIT
+
+cmake_minimum_required(VERSION 3.22)
+
+foreach(_required IN ITEMS TEST_EXECUTABLE TEST_OUTPUT_FILE)
+    if(NOT DEFINED ${_required} OR "${${_required}}" STREQUAL "")
+        message(FATAL_ERROR "${_required} is required")
+    endif()
+endforeach()
+
+# GoogleTest writes XML only when the batch finishes. Clear the old report before
+# starting the test process.
+get_filename_component(TEST_OUTPUT_FILE "${TEST_OUTPUT_FILE}" ABSOLUTE)
+get_filename_component(_output_dir "${TEST_OUTPUT_FILE}" DIRECTORY)
+file(MAKE_DIRECTORY "${_output_dir}")
+# EXISTS and rm -f can mistake inaccessible paths for missing files. TOUCH fails
+# on access errors and lets non-forced rm handle an initially absent report.
+if(NOT EXISTS "${TEST_OUTPUT_FILE}" AND NOT IS_SYMLINK "${TEST_OUTPUT_FILE}")
+    file(TOUCH "${TEST_OUTPUT_FILE}")
+endif()
+execute_process(
+    COMMAND "${CMAKE_COMMAND}" -E rm -- "${TEST_OUTPUT_FILE}"
+    COMMAND_ERROR_IS_FATAL ANY
+)
+
+execute_process(
+    COMMAND
+        "${TEST_EXECUTABLE}" "--gtest_filter=*" --gtest_brief=1
+        "--gtest_output=xml:${TEST_OUTPUT_FILE}"
+    COMMAND_ERROR_IS_FATAL ANY
+)

emulation/rocjitsu/tests/CMakeLists.txt

@@ -163,7 +163,9 @@ if(RJ_INSTALL_TESTS)
 
     install(FILES "${RJ_INSTALL_CTEST_FILE}" DESTINATION ${RJ_INSTALL_TEST_DIR})
     install(
-        FILES "${PROJECT_SOURCE_DIR}/cmake/rj_run_filtered_gtest.cmake"
+        FILES
+            "${PROJECT_SOURCE_DIR}/cmake/rj_run_filtered_gtest.cmake"
+            "${PROJECT_SOURCE_DIR}/cmake/rj_run_gtest_shard.cmake"
         DESTINATION ${RJ_INSTALL_TEST_DIR}
     )
     install(
@@ -656,7 +658,6 @@ add_executable(
     atomic_semantics_and_decode_test.cpp
     isa_target_registry_test.cpp
     pseudo_scalar_exec_test.cpp
-    valu_fp_mode_test.cpp
     scalar_scc_test.cpp
     vskip_test.cpp
     cdna3_predicate_mask_test.cpp
@@ -850,6 +851,51 @@ rj_add_gtest_tests(
         "-*Benchmark*:*RequestExitWakesAllPartitions*:*DispatchedWaitSurvivesAConcurrentFinalClose*:*EffectiveConfigTest.ReadsNativeLaunchConfigHandoff"
 )
 
+# GoogleTest registers every parameter before applying its filter. Keep the FP
+# matrices in their own executable so unrelated tests do not pay that cost.
+add_executable(rocjitsu_fp_mode_tests valu_fp_mode_test.cpp)
+target_link_libraries(
+    rocjitsu_fp_mode_tests
+    PRIVATE
+        ${RJ_OBJECT_LIBS}
+        util
+        flatbuffers
+        Threads::Threads
+        GTest::gtest_main
+)
+rj_configure_target(rocjitsu_fp_mode_tests TEST)
+if(RJ_INSTALL_TESTS)
+    rj_install_test_target(rocjitsu_fp_mode_tests)
+endif()
+
+# Batching amortizes registration, and GoogleTest assigns new cases to shards
+# automatically without maintaining per-case filters.
+set(_rj_fp_mode_shards 16)
+math(EXPR _rj_fp_mode_last_shard "${_rj_fp_mode_shards} - 1")
+foreach(_shard RANGE 0 ${_rj_fp_mode_last_shard})
+    set(_shard_env
+        "GTEST_TOTAL_SHARDS=${_rj_fp_mode_shards}"
+        "GTEST_SHARD_INDEX=${_shard}"
+    )
+    set(_shard_output "gtest-results/rocjitsu_fp_mode_${_shard}.xml")
+    rj_add_test(
+        NAME "ValuFpModeTest.Shard${_shard}"
+        COMMAND
+            "${CMAKE_COMMAND}"
+            "-DTEST_EXECUTABLE=$<TARGET_FILE:rocjitsu_fp_mode_tests>"
+            "-DTEST_OUTPUT_FILE=${_shard_output}" -P
+            "${PROJECT_SOURCE_DIR}/cmake/rj_run_gtest_shard.cmake"
+        ENVIRONMENT ${_shard_env}
+        INSTALL_COMMAND
+            "${CMAKE_COMMAND}"
+            "-DTEST_EXECUTABLE=bin/rocjitsu_fp_mode_tests"
+            "-DTEST_OUTPUT_FILE=${_shard_output}" -P
+            "rj_run_gtest_shard.cmake"
+        INSTALL_ENVIRONMENT ${_shard_env}
+        LABELS fp-mode
+    )
+endforeach()
+
 # RequestExitWakesAllPartitions may require several runs to show regression
 # (deadlock). Run 30 times with a 10 second timeout to boost chances of seeing
 # the failures. Usually fails within the first 5 times and 30 passing tests