feat(libSceLibcInternal): implement fminf required for PPSA99902 startup

core/libs/prx/libSceLibcInternal/CMakeLists.txt

@@ -95,4 +95,14 @@ if(BUILD_TESTING)
         set_tests_properties(guest_force_tls_destructor PROPERTIES ENVIRONMENT_MODIFICATION
             "PATH=path_list_prepend:$<TARGET_FILE_DIR:libSceLibcInternal>")
     endif()
+    add_test_executable(guest_fminf_tests ${LIBS_INCLUDE_DIR}/tests/GuestFminf.cpp)
+    target_include_directories(guest_fminf_tests PRIVATE ${LIBS_INCLUDE_DIR})
+    target_link_libraries(guest_fminf_tests PRIVATE libSceLibcInternal libc)
+    configure_windows_unwind(guest_fminf_tests)
+    add_test(NAME guest_fminf COMMAND guest_fminf_tests)
+    set_tests_properties(guest_fminf PROPERTIES TIMEOUT 20)
+    if(WIN32)
+        set_tests_properties(guest_fminf PROPERTIES ENVIRONMENT_MODIFICATION
+            "PATH=path_list_prepend:$<TARGET_FILE_DIR:libSceLibcInternal>")
+    endif()
 endif()

core/libs/prx/libSceLibcInternal/Export.cpp

@@ -7,6 +7,7 @@
 #include <sstream>
 #include <stdexcept>
 #include <vector>
+#include <cmath>
 #ifdef _WIN32
 #include <windows.h>
 #else
@@ -141,4 +142,7 @@ unsigned int APS5_VABI alarm_nid_postfix(unsigned int seconds) {
     return GuestAlarm_nid_no_patch(seconds);
 }
 
+float APS5_VABI fminf_nid_postfix(float x, float y) {
+    return std::fmin(x, y);
+}
 }

core/libs/tests/GuestFminf.cpp

@@ -0,0 +1,46 @@
+#include "prx/libc/include/general/VabiMacros.hpp"
+#include <cmath>
+#include <cstdio>
+#include <cstdlib>
+#include <limits>
+
+extern "C" {
+float APS5_VABI fminf_nid_postfix(float, float);
+}
+
+static void Check(bool condition, int line) {
+    if (!condition) {
+        std::fprintf(stderr, "fminf check failed at line %d\n", line);
+        std::abort();
+    }
+}
+#define Require(value) Check((value), __LINE__)
+
+int main() {
+    const auto nan = std::numeric_limits<float>::quiet_NaN();
+    const auto infinity = std::numeric_limits<float>::infinity();
+
+    Require(fminf_nid_postfix(3.0f, -2.0f) == -2.0f);
+    Require(fminf_nid_postfix(-2.0f, 3.0f) == -2.0f);
+    Require(fminf_nid_postfix(1.5f, 2.5f) == 1.5f);
+
+    Require(fminf_nid_postfix(nan, 4.0f) == 4.0f);
+    Require(fminf_nid_postfix(4.0f, nan) == 4.0f);
+    Require(std::isnan(fminf_nid_postfix(nan, nan)));
+
+    const auto minNegZero = fminf_nid_postfix(-0.0f, +0.0f);
+    const auto minPosZero = fminf_nid_postfix(+0.0f, -0.0f);
+    Require(minNegZero == 0.0f && std::signbit(minNegZero));
+    Require(minPosZero == 0.0f && std::signbit(minPosZero));
+    Require(std::signbit(fminf_nid_postfix(-0.0f, -0.0f)));
+    Require(!std::signbit(fminf_nid_postfix(+0.0f, +0.0f)));
+
+    Require(fminf_nid_postfix(infinity, -infinity) == -infinity);
+    Require(fminf_nid_postfix(-infinity, infinity) == -infinity);
+    Require(fminf_nid_postfix(infinity, 5.0f) == 5.0f);
+    Require(fminf_nid_postfix(5.0f, infinity) == 5.0f);
+    Require(fminf_nid_postfix(-infinity, 5.0f) == -infinity);
+    Require(fminf_nid_postfix(5.0f, -infinity) == -infinity);
+
+    return 0;
+}