fate: Allow running multiple rounds of tests with differing settings

This can be used to run tests multple times, with e.g. differing
QEMU settings, by adding something like this to the FATE configuration
file:

    target_exec="qemu-aarch64-static"
    fate_targets="fate-checkasm fate-cpu"

    fate_environments="sve128 sve256 sve512"
    sve128_env="QEMU_CPU=max,sve128=on"
    sve256_env="QEMU_CPU=max,sve256=on"
    sve512_env="QEMU_CPU=max,sve512=on"

It's also possible to customize the target_exec command further
by injecting a sufficiently quoted variable into it, which then can
be updated for each run, e.g. target_exec="\$(CUR_EXEC_CMD)".

For each of the environment names in fate_environments, the tests
that are run get the name suffixed on the fate tests in the
test log and fate report, e.g. "fate-checkasm-h264dsp_sve128".
Signed-off-by: Martin Storsjö <martin@martin.st>

doc/fate_config.sh.template

@@ -33,3 +33,23 @@ makeopts=       # extra options passed to 'make'
                 # defaults to 'tar c'
 #fate_targets=  # targets to make when running fate; defaults to "fate",
                 # can be set to run a subset of tests, e.g. "fate-checkasm".
+
+#fate_environments=  # a list of names of configurations to run tests for;
+                     # each round is run with variables from ${${name}_env} set.
+
+# One example of using fate_environments:
+
+# target_exec="qemu-aarch64-static"
+# fate_targets="fate-checkasm fate-cpu"
+# fate_environments="sve128 sve256"
+# sve128_env="QEMU_CPU=max,sve128=on"
+# sve256_env="QEMU_CPU=max,sve256=on"
+
+# The variables set by fate_environments can also be used explicitly
+# by target_exec, e.g. like this:
+
+# target_exec="qemu-aarch64-static -cpu \$(MY_CPU)"
+# fate_targets="fate-checkasm fate-cpu"
+# fate_environments="sve128 sve256"
+# sve128_env="MY_CPU=max,sve128=on"
+# sve256_env="MY_CPU=max,sve256=on"

tests/Makefile

@@ -305,8 +305,8 @@ $(FATE): export PROGSUF = $(PROGSSUF)
 $(FATE): export EXECSUF = $(EXESUF)
 $(FATE): export HOSTEXECSUF = $(HOSTEXESUF)
 $(FATE): $(FATE_UTILS:%=tests/%$(HOSTEXESUF)) | $(FATE_OUTDIRS)
-	@echo "TEST    $(@:fate-%=%)"
-	$(Q)$(SRC_PATH)/tests/fate-run.sh $@ "$(TARGET_SAMPLES)" "$(TARGET_EXEC)" "$(TARGET_PATH)" '$(CMD)' '$(CMP)' '$(REF)' '$(FUZZ)' '$(THREADS)' '$(THREAD_TYPE)' '$(CPUFLAGS)' '$(CMP_SHIFT)' '$(CMP_TARGET)' '$(SIZE_TOLERANCE)' '$(CMP_UNIT)' '$(GEN)' '$(HWACCEL)' '$(REPORT)' '$(KEEP_FILES)'
+	@echo "TEST    $(@:fate-%=%)$(FATE_SUFFIX)"
+	$(Q)$(SRC_PATH)/tests/fate-run.sh $@$(FATE_SUFFIX) "$(TARGET_SAMPLES)" "$(TARGET_EXEC)" "$(TARGET_PATH)" '$(CMD)' '$(CMP)' '$(REF)' '$(FUZZ)' '$(THREADS)' '$(THREAD_TYPE)' '$(CPUFLAGS)' '$(CMP_SHIFT)' '$(CMP_TARGET)' '$(SIZE_TOLERANCE)' '$(CMP_UNIT)' '$(GEN)' '$(HWACCEL)' '$(REPORT)' '$(KEEP_FILES)'
 
 fate-list:
 	@printf '%s\n' $(sort $(FATE))

tests/fate.sh

@@ -75,7 +75,19 @@ compile()(
 fate()(
     test "$build_only" = "yes" && return
     cd ${build} || return
-    ${make} ${makeopts_fate-${makeopts}} -k ${fate_targets}
+    if [ -n "${fate_environments}" ]; then
+        ret=0
+        for e in ${fate_environments}; do
+            eval "curenv=\${${e}_env}"
+            echo Testing environment ${e}: ${curenv}
+            ${make} ${makeopts_fate-${makeopts}} -k ${fate_targets} FATE_SUFFIX=_${e} ${curenv}
+            cur_ret=$?
+            test $cur_ret != 0 && ret=$cur_ret
+        done
+        return $ret
+    else
+        ${make} ${makeopts_fate-${makeopts}} -k ${fate_targets}
+    fi
 )
 
 clean(){