rename gpu_senquack to gpu_unai

[pcsx_rearmed.git] / plugins / gpu_unai / gpu_inner_light_arm.h

diff --git a/plugins/gpu_unai/gpu_inner_light_arm.h b/plugins/gpu_unai/gpu_inner_light_arm.h
new file mode 100644 (file)
index 0000000..550f6b1
--- /dev/null
+++ b/plugins/gpu_unai/gpu_inner_light_arm.h
@@ -0,0 +1,112 @@
+#ifndef _OP_LIGHT_ARM_H_
+#define _OP_LIGHT_ARM_H_
+
+////////////////////////////////////////////////////////////////////////////////
+// Extract bgr555 color from Gouraud u32 fixed-pt 8.3:8.3:8.2 rgb triplet
+//
+// INPUT:
+//  'gCol' input:  rrrrrrrrXXXggggggggXXXbbbbbbbbXX
+//                 ^ bit 31
+// RETURNS:
+//    u16 output:  0bbbbbgggggrrrrr
+//                 ^ bit 16
+// Where 'r,g,b' are integer bits of colors, 'X' fixed-pt, and '0' zero
+////////////////////////////////////////////////////////////////////////////////
+GPU_INLINE uint_fast16_t gpuLightingRGBARM(u32 gCol)
+{
+       uint_fast16_t out = 0x03E0; // don't need the mask after starting to write output
+       u32 tmp;
+  
+       asm ("and %[tmp], %[gCol], %[out]\n\t"              // tmp holds 0x000000bbbbb00000
+            "and %[out], %[out],  %[gCol], lsr #0x0B\n\t"  // out holds 0x000000ggggg00000
+            "orr %[tmp], %[out],  %[tmp],  lsl #0x05\n\t"  // tmp holds 0x0bbbbbggggg00000
+            "orr %[out], %[tmp],  %[gCol], lsr #0x1B\n\t"  // out holds 0x0bbbbbgggggrrrrr
+            : [out] "+&r" (out), [tmp] "=&r" (tmp)
+            : [gCol] "r"  (gCol)
+            );
+
+       return out;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Apply fast (low-precision) 5-bit lighting to bgr555 texture color:
+//
+// INPUT:
+//       'r5','g5','b5' are unsigned 5-bit color values, value of 15
+//         is midpoint that doesn't modify that component of texture
+//       'uSrc' input:  mbbbbbgggggrrrrr
+//                      ^ bit 16
+// RETURNS:
+//         u16 output:  mbbbbbgggggrrrrr
+// Where 'X' are fixed-pt bits.
+////////////////////////////////////////////////////////////////////////////////
+GPU_INLINE uint_fast16_t gpuLightingTXTARM(uint_fast16_t uSrc, u8 r5, u8 g5, u8 b5)
+{
+       uint_fast16_t out = 0x03E0;
+       u32 db, dg;
+
+       // Using `g` for src, `G` for dest
+       asm ("and    %[dg],  %[out],    %[src]  \n\t"             // dg holds 0x000000ggggg00000
+            "orr    %[dg],  %[dg],     %[g5]   \n\t"             // dg holds 0x000000gggggGGGGG
+            "and    %[db],  %[out],    %[src], lsr #0x05 \n\t"   // db holds 0x000000bbbbb00000
+            "ldrb   %[dg],  [%[lut],   %[dg]]  \n\t"             // dg holds result 0x00000000000ggggg
+            "and    %[out], %[out],    %[src], lsl #0x05 \n\t"   // out holds 0x000000rrrrr00000
+            "orr    %[out], %[out],    %[r5]   \n\t"             // out holds 0x000000rrrrrRRRRR
+            "orr    %[db],  %[db],     %[b5]   \n\t"             // db holds 0x000000bbbbbBBBBB
+            "ldrb   %[out], [%[lut],   %[out]] \n\t"             // out holds result 0x00000000000rrrrr
+            "ldrb   %[db],  [%[lut],   %[db]]  \n\t"             // db holds result 0x00000000000bbbbb
+            "tst    %[src], #0x8000\n\t"                         // check whether msb was set on uSrc
+            "orr    %[out], %[out],    %[dg],  lsl #0x05   \n\t" // out holds 0x000000gggggrrrrr
+            "orrne  %[out], %[out],    #0x8000\n\t"              // add msb to out if set on uSrc
+            "orr    %[out], %[out],    %[db],  lsl #0x0A   \n\t" // out holds 0xmbbbbbgggggrrrrr
+            : [out] "=&r" (out), [db] "=&r" (db), [dg] "=&r" (dg)
+            : [r5] "r" (r5), [g5] "r" (g5),  [b5] "r" (b5),
+              [lut] "r" (gpu_senquack.LightLUT), [src] "r" (uSrc), "0" (out)
+            : "cc");
+       return out;
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Apply fast (low-precision) 5-bit Gouraud lighting to bgr555 texture color:
+//
+// INPUT:
+//  'gCol' is a packed Gouraud u32 fixed-pt 8.3:8.3:8.2 rgb triplet, value of
+//     15.0 is midpoint that does not modify color of texture
+//        gCol input :  rrrrrXXXXXXgggggXXXXXXbbbbbXXXXX
+//                      ^ bit 31
+//       'uSrc' input:  mbbbbbgggggrrrrr
+//                      ^ bit 16
+// RETURNS:
+//         u16 output:  mbbbbbgggggrrrrr
+// Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care
+////////////////////////////////////////////////////////////////////////////////
+GPU_INLINE uint_fast16_t gpuLightingTXTGouraudARM(uint_fast16_t uSrc, u32 gCol)
+{
+       uint_fast16_t out = 0x03E0; // don't need the mask after starting to write output
+       u32 db,dg,gtmp;
+
+       // Using `g` for src, `G` for dest
+       asm ("and    %[dg],  %[out],  %[src]   \n\t"           // dg holds 0x000000ggggg00000
+            "and    %[gtmp],%[out],  %[gCol], lsr #0x0B \n\t" // gtmp holds 0x000000GGGGG00000
+            "and    %[db],  %[out],  %[src],  lsr #0x05 \n\t" // db holds 0x000000bbbbb00000
+            "orr    %[dg],  %[dg],   %[gtmp], lsr #0x05 \n\t" // dg holds 0x000000gggggGGGGG
+            "and    %[gtmp],%[out],  %[gCol]  \n\t"           // gtmp holds 0x000000BBBBB00000
+            "ldrb   %[dg],  [%[lut], %[dg]]   \n\t"           // dg holds result 0x00000000000ggggg
+            "and    %[out], %[out],  %[src],  lsl #0x05 \n\t" // out holds 0x000000rrrrr00000
+            "orr    %[out], %[out],  %[gCol], lsr #0x1B \n\t" // out holds 0x000000rrrrrRRRRR
+            "orr    %[db],  %[db],   %[gtmp], lsr #0x05 \n\t" // db holds 0x000000bbbbbBBBBB
+            "ldrb   %[out], [%[lut], %[out]]  \n\t"           // out holds result 0x00000000000rrrrr
+            "ldrb   %[db],  [%[lut], %[db]]   \n\t"           // db holds result 0x00000000000bbbbb
+            "tst    %[src], #0x8000\n\t"                      // check whether msb was set on uSrc
+            "orr    %[out], %[out],  %[dg],   lsl #0x05 \n\t" // out holds 0x000000gggggrrrrr
+            "orrne  %[out], %[out],  #0x8000\n\t"             // add msb to out if set on uSrc
+            "orr    %[out], %[out],  %[db],   lsl #0x0A \n\t" // out holds 0xmbbbbbgggggrrrrr
+            : [out] "=&r" (out), [db] "=&r" (db), [dg] "=&r" (dg),
+              [gtmp] "=&r" (gtmp) \
+            : [gCol] "r" (gCol), [lut] "r" (gpu_senquack.LightLUT), "0" (out), [src] "r" (uSrc)
+            : "cc");
+
+       return out;
+}
+
+#endif  //_OP_LIGHT_ARM_H_