Vendor Teakra, make emulator own DSP RAM and add DSP RAM to fastmem (#806)

* DSP: Own DSP RAM and add it to fastmem

* Vendor Teakra

* Add MacOS support to fastmem

* Fix MacOS fastmem paths

* Fix iOS build

third_party/teakra/src/step2_test_generator/CMakeLists.txt

@@ -0,0 +1,9 @@
+include(CreateDirectoryGroups)
+
+add_executable(step2_test_generator
+    main.cpp
+)
+create_target_directory_groups(step2_test_generator)
+target_link_libraries(step2_test_generator PRIVATE teakra)
+target_include_directories(step2_test_generator PRIVATE .)
+target_compile_options(step2_test_generator PRIVATE ${TEAKRA_CXX_FLAGS})

third_party/teakra/src/step2_test_generator/main.cpp

@@ -0,0 +1,41 @@
+#include <cstdio>
+#include <memory>
+#include "../test.h"
+
+int main(int argc, char** argv) {
+    if (argc < 2) {
+        std::fprintf(stderr, "A file path argument must be specified. Exiting...\n");
+        return -1;
+    }
+
+    std::unique_ptr<std::FILE, fclose_deleter> f{std::fopen(argv[1], "wb")};
+    if (!f) {
+        std::fprintf(stderr, "Unable to open file %s. Exiting...\n", argv[1]);
+        return -2;
+    }
+
+    TestCase test_case{};
+    u16 r0base = 0x4839;
+    test_case.opcode = 0xDFE9; // modr r0+arps0
+    test_case.expand = 0;
+    test_case.before.mod2 = 1; // enable mod for r0;
+
+    for (u16 legacy = 0; legacy < 2; ++legacy) {
+        test_case.before.mod1 = legacy << 13;
+        for (u16 step = 4; step < 8; ++step) {
+            test_case.before.arp[0] = step;
+            for (u16 mod = 0; mod < 0x200; ++mod) {
+                test_case.before.cfgi = mod << 7;
+                for (u16 r = 0; r < 0x20; ++r) {
+                    test_case.before.r[0] = r + r0base;
+                    if (std::fwrite(&test_case, sizeof(test_case), 1, f.get()) == 0) {
+                        std::fprintf(stderr, "Unable to completely write test case. Exiting...\n");
+                        return -3;
+                    }
+                }
+            }
+        }
+    }
+
+    return 0;
+}