Decompile GX_bgcnt.s

2 files changed, 228 insertions, 1 deletions

diff --git a/arm9/lib/include/gx.h b/arm9/lib/include/gx.h
index 6919cbfd..3f218df9 100644
--- a/arm9/lib/include/gx.h
+++ b/arm9/lib/include/gx.h
@@ -51,6 +51,19 @@
 
 #define HW_REG_DISP3DCNT       0x04000060
 
+#define HW_REG_BG0CNT_A 0x04000008
+#define HW_REG_BG1CNT_A 0x0400000A
+#define HW_REG_BG2CNT_A 0x0400000C
+#define HW_REG_BG3CNT_A 0x0400000E
+
+#define HW_REG_BG0CNT_B 0x04001008
+#define HW_REG_BG1CNT_B 0x0400100A
+#define HW_REG_BG2CNT_B 0x0400100C
+#define HW_REG_BG3CNT_B 0x0400100E
+
+#define HW_REG_DISPCNT_A 0x04000000
+#define HW_REG_DISPCNT_B 0x04001000
+
 //TODO: wait for register commit and replace these
 #define SETREG8(x, y) ((*(vu8 *)x) = y)
 #define SETREG16(x, y) ((*(vu16 *)x) = y)
@@ -105,7 +118,7 @@ void G3_RotY(fx32 sinphi, fx32 cosphi);
 void G3_RotZ(fx32 sinphi, fx32 cosphi);
 
 //GX_g3x
-asm void GXi_NopClearFifo128_(void *reg);
+void GXi_NopClearFifo128_(void *reg);
 void G3X_Init();
 void G3X_ResetMtxStack();
 void G3X_ClearFifo();
@@ -197,6 +210,25 @@ u32 GX_GetBankForSubOBJ();
 u32 GX_GetBankForSubBGExtPltt();
 u32 GX_GetBankForSubOBJExtPltt();
 
+//GX_bgcnt
+void *G2_GetBG0ScrPtr();
+void *G2S_GetBG0ScrPtr();
+void *G2_GetBG1ScrPtr();
+void *G2S_GetBG1ScrPtr();
+void *G2_GetBG2ScrPtr();
+void *G2S_GetBG2ScrPtr();
+void *G2_GetBG3ScrPtr();
+void *G2S_GetBG3ScrPtr();
+void *G2_GetBG0CharPtr();
+void *G2S_GetBG0CharPtr();
+void *G2_GetBG1CharPtr();
+void *G2S_GetBG1CharPtr();
+void *G2_GetBG2CharPtr();
+void *G2S_GetBG2CharPtr();
+void *G2_GetBG3CharPtr();
+void *G2S_GetBG3CharPtr();
+
+
 //GXi_NopClearFifo128_ probably asm
 
 #endif //GUARD_GX_H
diff --git a/arm9/lib/src/GX_bgcnt.c b/arm9/lib/src/GX_bgcnt.c
new file mode 100644
index 00000000..918f4d32
--- /dev/null
+++ b/arm9/lib/src/GX_bgcnt.c
@@ -0,0 +1,195 @@
+#include "global.h"
+#include "main.h"
+#include "gx.h"
+
+void *G2_GetBG0ScrPtr(){
+    u32 temp = (((READREG16(HW_REG_BG0CNT_A) & 0x1F00) >> 0x8) << 0xB);
+    return (void *)(0x6000000 + (((READREG32(HW_REG_DISPCNT_A) & 0x38000000) >> 0x1B) << 0x10) + temp);
+}
+
+void *G2S_GetBG0ScrPtr(){
+    return (void *)(0x6200000 + (((READREG16(HW_REG_BG0CNT_B) & 0x1F00) >> 0x8) << 0xB));
+}
+
+void *G2_GetBG1ScrPtr(){
+    u32 temp = (((READREG16(HW_REG_BG1CNT_A) & 0x1F00) >> 0x8) << 0xB);
+    return (void *)(0x6000000 + (((READREG32(HW_REG_DISPCNT_A) & 0x38000000) >> 0x1B) << 0x10) + temp);
+}
+
+void *G2S_GetBG1ScrPtr(){
+    return (void *)(0x6200000 + (((READREG16(HW_REG_BG1CNT_B) & 0x1F00) >> 0x8) << 0xB));
+}
+
+void *G2_GetBG2ScrPtr(){
+    u32 temp12 = (READREG32(HW_REG_DISPCNT_A) & 0x7);
+    u32 temp3 = READREG16(HW_REG_BG2CNT_A);
+    u32 temp2 = (((READREG32(HW_REG_DISPCNT_A) & 0x38000000) >> 0x1B) << 0x10);
+    u32 temp1 = ((temp3 & 0x1F00) >> 0x8);
+    switch (temp12)
+    {
+        case 0:
+        case 1:
+        case 2:
+        case 3:
+        case 4:
+            return (void *)(0x6000000 + temp2 + (temp1 << 0xB));
+        case 5:
+            if (temp3 & 0x80)
+                return (void *)(0x6000000 + (temp1 << 0xE));
+            else
+                return (void *)(0x6000000 + temp2 + (temp1 << 0xB));
+        case 6:
+            return (void *)0x6000000;
+        default:
+            return NULL;
+    }
+}
+
+void *G2S_GetBG2ScrPtr(){
+    u32 temp12 = (READREG32(HW_REG_DISPCNT_B) & 0x7);
+    u32 temp3 = READREG16(HW_REG_BG2CNT_B);
+    u32 temp1 = ((temp3 & 0x1F00) >> 0x8);
+    switch (temp12)
+    {
+        case 0:
+        case 1:
+        case 2:
+        case 3:
+        case 4:
+            return (void *)(0x6200000 + (temp1 << 0xB));
+        case 5:
+            if (temp3 & 0x80)
+                return (void *)(0x6200000 + (temp1 << 0xE));
+            else
+                return (void *)(0x6200000 + (temp1 << 0xB));
+        case 6:
+            return NULL;
+        default:
+            return NULL;
+    }
+}
+
+void *G2_GetBG3ScrPtr(){
+    u32 temp12 = (READREG32(HW_REG_DISPCNT_A) & 0x7);
+    u32 temp3 = READREG16(HW_REG_BG3CNT_A);
+    u32 temp2 = (((READREG32(HW_REG_DISPCNT_A) & 0x38000000) >> 0x1B) << 0x10);
+    u32 temp1 = ((temp3 & 0x1F00) >> 0x8);
+    switch (temp12)
+    {
+        case 0:
+        case 1:
+        case 2:
+            return (void *)(0x6000000 + temp2 + (temp1 << 0xB));
+        case 3:
+        case 4:
+        case 5:
+            if (temp3 & 0x80)
+                return (void *)(0x6000000 + (temp1 << 0xE));
+            else
+                return (void *)(0x6000000 + temp2 + (temp1 << 0xB));
+        case 6:
+            return NULL;
+        default:
+            return NULL;
+    }
+}
+
+void *G2S_GetBG3ScrPtr(){
+    u32 temp12 = (READREG32(HW_REG_DISPCNT_B) & 0x7);
+    u32 temp3 = READREG16(HW_REG_BG3CNT_B);
+    u32 temp1 = ((temp3 & 0x1F00) >> 0x8);
+    switch (temp12)
+    {
+        case 0:
+        case 1:
+        case 2:
+            return (void *)(0x6200000 + (temp1 << 0xB));
+        case 3:
+        case 4:
+        case 5:
+            if (temp3 & 0x80)
+                return (void *)(0x6200000 + (temp1 << 0xE));
+            else
+                return (void *)(0x6200000 + (temp1 << 0xB));
+        case 6:
+            return NULL;
+        default:
+            return NULL;
+    }
+}
+
+void *G2_GetBG0CharPtr(){
+    u32 temp = (((READREG16(HW_REG_BG0CNT_A) & 0x3C) >> 0x2) << 0xE);
+    return (void *)(0x6000000 + (((READREG32(HW_REG_DISPCNT_A) & 0x7000000) >> 0x18) << 0x10) + temp);
+}
+
+void *G2S_GetBG0CharPtr(){
+    return (void *)(0x6200000 + (((READREG16(HW_REG_BG0CNT_B) & 0x3C) >> 0x2) << 0xE));
+}
+
+void *G2_GetBG1CharPtr(){
+    u32 temp = (((READREG16(HW_REG_BG1CNT_A) & 0x3C) >> 0x2) << 0xE);
+    return (void *)(0x6000000 + (((READREG32(HW_REG_DISPCNT_A) & 0x7000000) >> 0x18) << 0x10) + temp);
+}
+
+void *G2S_GetBG1CharPtr(){
+    return (void *)(0x6200000 + (((READREG16(HW_REG_BG1CNT_B) & 0x3C) >> 0x2) << 0xE));
+}
+
+void *G2_GetBG2CharPtr(){
+    s32 temp1 = (READREG32(HW_REG_DISPCNT_A) & 0x7);
+    u32 temp = READREG16(HW_REG_BG2CNT_A);
+    if (temp1 < 5 || !(temp & 0x80))
+    {
+        u32 temp1 = (((READREG32(HW_REG_DISPCNT_A) & 0x7000000) >> 0x18) << 0x10);
+        u32 temp2 = (temp & 0x3C) >> 2;
+        return (void *)(0x6000000 + temp1 + (temp2 << 0xE));
+    }
+    else
+    {
+        return NULL;
+    }
+}
+
+void *G2S_GetBG2CharPtr(){
+    s32 temp1 = (READREG32(HW_REG_DISPCNT_B) & 0x7);
+    u32 temp = READREG16(HW_REG_BG2CNT_B);
+    if (temp1 < 5 || !(temp & 0x80))
+    {
+        u32 temp2 = ((temp & 0x3C) >> 2) << 0xE;
+        return (void *)(0x6200000 + temp2);
+    }
+    else
+    {
+        return NULL;
+    }
+}
+
+void *G2_GetBG3CharPtr(){
+    s32 temp1 = (READREG32(HW_REG_DISPCNT_A) & 0x7);
+    u32 temp = READREG16(HW_REG_BG3CNT_A);
+    if (temp1 < 3 || (temp1 < 6 && !(temp & 0x80)))
+    {
+        u32 temp1 = (((READREG32(HW_REG_DISPCNT_A) & 0x7000000) >> 0x18) << 0x10);
+        u32 temp2 = (temp & 0x3C) >> 2;
+        return (void *)(0x6000000 + temp1 + (temp2 << 0xE));
+    }
+    else
+    {
+        return NULL;
+    }
+}
+
+void *G2S_GetBG3CharPtr(){
+    s32 temp1 = (READREG32(HW_REG_DISPCNT_B) & 0x7);
+    u32 temp = READREG16(HW_REG_BG3CNT_B);
+    if (temp1 < 3 || (temp1 < 6 && !(temp & 0x80)))
+    {
+        u32 temp2 = ((temp & 0x3C) >> 2) << 0xE;
+        return (void *)(0x6200000 + temp2);
+    }
+    else
+    {
+        return NULL;
+    }
+}