Implement osViGetCurrentLine and osViGetCurrentField

N64Recomp · Jun 19, 2024 · 8719abe · 8719abe
1 parent e94dc40
commit 8719abe
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Showing 3 changed files with 20 additions and 0 deletions.
diff --git a/librecomp/src/vi.cpp b/librecomp/src/vi.cpp
@@ -22,6 +22,14 @@ extern "C" void osViRepeatLine_recomp(uint8_t* rdram, recomp_context* ctx) {
     osViRepeatLine(_arg<0, u8>(rdram, ctx));
 }
 
+extern "C" void osViGetCurrentLine_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ctx->r2 = (gpr)osViGetCurrentLine();
+}
+
+extern "C" void osViGetCurrentField_recomp(uint8_t* rdram, recomp_context* ctx) {
+    ctx->r2 = (gpr)osViGetCurrentField();
+}
+
 extern "C" void osViSetSpecialFeatures_recomp(uint8_t* rdram, recomp_context* ctx) {
     osViSetSpecialFeatures((uint32_t)ctx->r4);
 }

diff --git a/ultramodern/include/ultramodern/ultra64.h b/ultramodern/include/ultramodern/ultra64.h
@@ -44,6 +44,8 @@ typedef uint8_t u8;
 #  ifdef __cplusplus
 #    define NULLPTR (PTR(void))0
 #  endif
+#  define PHYS_TO_K1(x)	((x)|0xA0000000)
+#  define IO_READ(addr) (*(volatile uint32_t*)PHYS_TO_K1(addr))
 #endif
 
 #ifndef NULL
@@ -285,6 +287,8 @@ void osViSetMode(RDRAM_ARG PTR(OSViMode));
 void osViSetSpecialFeatures(uint32_t func);
 void osViBlack(uint8_t active);
 void osViRepeatLine(uint8_t active);
+u32 osViGetCurrentLine();
+u32 osViGetCurrentField();
 void osViSetXScale(float scale);
 void osViSetYScale(float scale);
 PTR(void) osViGetNextFramebuffer();

diff --git a/ultramodern/src/events.cpp b/ultramodern/src/events.cpp
@@ -480,6 +480,14 @@ extern "C" void osViRepeatLine(uint8_t active) {
     }
 }
 
+extern "C" u32 osViGetCurrentLine() {
+    return IO_READ(VI_V_CURRENT_LINE_REG);
+}
+
+extern "C" u32 osViGetCurrentField() {
+    return IO_READ(VI_V_CURRENT_LINE_REG) & 1;
+}
+
 extern "C" void osViSetXScale(float scale) {
     if (scale != 1.0f) {
         assert(false);