fix(agc): accept the REWIND offload-enable payload bit

core/libs/prx/libSceAgcDriver/Execution/include/Pm4.hpp

@@ -153,6 +153,7 @@ inline bool CopyDataImmediate(std::uint32_t source) { return source >= 10 && sou
 inline bool CopyDataToRegister(std::span<const std::uint32_t> packet) { return ((packet[1] >> 8u) & 0xfu) == 0; }
 inline std::size_t CopyDataBytes(std::span<const std::uint32_t> packet) { return (packet[1] & 0x10000u) != 0 ? 8 : 4; }
 inline constexpr std::uint32_t RewindValid = 0x80000000u;
+inline constexpr std::uint32_t RewindOffloadEnable = 0x01000000u;
 struct WaitFields {
     std::uint32_t function;
     std::uint64_t address;

core/libs/prx/libSceAgcDriver/Execution/src/Pm4.cpp

@@ -450,7 +450,7 @@ void Validate(std::span<const std::uint32_t> packet, std::uint32_t queue) {
         }
         case 0x59:
             size(2);
-            require((packet[1] & 0x7fffffffu) == 0, "unsupported REWIND payload bits");
+            require((packet[1] & ~(RewindValid | RewindOffloadEnable)) == 0, "unsupported REWIND payload bits");
             break;
         case 0x3c: case 0x93: {
             size(opcode == 0x3c ? 7 : 9);

core/libs/prx/libSceAgcDriver/tests/Pm4.cpp

@@ -1105,6 +1105,11 @@ void testConditionalSubmission() {
     check(results[13] == 0, "a rejected conditional submission executed a guarded packet");
 }
 
+void testRewindPayloadBits() {
+    for (const auto payload : {0x00000000u, 0x80000000u, 0x01000000u, 0x81000000u}) AgcDriver::Pm4::Validate(makePacket(0x59, {payload}), 0);
+    for (const auto payload : {0x82000000u, 0x80000001u, 0x00800000u}) expectFailure([&] { AgcDriver::Pm4::Validate(makePacket(0x59, {payload}), 0); }, "unsupported REWIND payload bits");
+}
+
 void testNopPadSubmission() {
     alignas(8) static std::uint32_t zero = 0;
     static std::array<std::uint32_t, 3> results{};
@@ -1824,6 +1829,7 @@ int main(int argc, char** argv) {
         }
         testCatalog();
         testNopPad();
+        testRewindPayloadBits();
         testWriteChangedKeepsUntouchedBytes();
         testWriteChangedStoresExactlyTheChangedRuns();
         testRegisters();