diff options
| -rw-r--r-- | plugins/gpu_unai/gpu_inner.h | 68 | ||||
| -rw-r--r-- | plugins/gpu_unai/gpu_inner_blend.h | 8 | ||||
| -rw-r--r-- | plugins/gpu_unai/gpu_inner_blend_arm.h | 103 | ||||
| -rw-r--r-- | plugins/gpu_unai/gpu_inner_light.h | 34 | ||||
| -rw-r--r-- | plugins/gpu_unai/gpu_inner_light_arm.h | 112 |
5 files changed, 281 insertions, 44 deletions
diff --git a/plugins/gpu_unai/gpu_inner.h b/plugins/gpu_unai/gpu_inner.h index 723e09f..76479f9 100644 --- a/plugins/gpu_unai/gpu_inner.h +++ b/plugins/gpu_unai/gpu_inner.h @@ -48,12 +48,29 @@ //#include "gpu_inner_blend.h" //#endif -// TODO: use the arm-optimized gpu_inner_blends for arm builds #include "gpu_inner_blend.h" - #include "gpu_inner_quantization.h" #include "gpu_inner_light.h" +#ifdef __arm__ +#include "gpu_inner_blend_arm.h" +#include "gpu_inner_light_arm.h" +#define gpuBlending gpuBlendingARM +#define gpuLightingRGB gpuLightingRGBARM +#define gpuLightingTXT gpuLightingTXTARM +#define gpuLightingTXTGouraud gpuLightingTXTGouraudARM +// Non-dithering lighting and blending functions preserve uSrc +// MSB. This saves a few operations and useless load/stores. +#define MSB_PRESERVED (!CF_DITHER) +#else +#define gpuBlending gpuBlendingGeneric +#define gpuLightingRGB gpuLightingRGBGeneric +#define gpuLightingTXT gpuLightingTXTGeneric +#define gpuLightingTXTGouraud gpuLightingTXTGouraudGeneric +#define MSB_PRESERVED 0 +#endif + + // If defined, Gouraud colors are fixed-point 5.11, otherwise they are 8.16 // This is only for debugging/verification of low-precision colors in C. // Low-precision Gouraud is intended for use by SIMD-optimized inner drivers @@ -140,10 +157,10 @@ static u8* gpuPixelSpanFn(u8* pDst, uintptr_t data, ptrdiff_t incr, size_t len) else { *(u16*)pDst = col; } } } else { - u16 uDst = *(u16*)pDst; + uint_fast16_t uDst = *(u16*)pDst; if (CF_MASKCHECK) { if (uDst & 0x8000) goto endpixel; } - u16 uSrc = col; + uint_fast16_t uSrc = col; if (CF_BLEND) uSrc = gpuBlending<CF_BLENDMODE, skip_uSrc_mask>(uSrc, uDst); @@ -166,11 +183,11 @@ static u8* gpuPixelSpanFn(u8* pDst, uintptr_t data, ptrdiff_t incr, size_t len) else { *(u16*)pDst = col; } } } else { - u16 uDst = *(u16*)pDst; + uint_fast16_t uDst = *(u16*)pDst; if (CF_MASKCHECK) { if (uDst & 0x8000) goto endpixel; } col = gpuGouraudColor15bpp(r, g, b); - u16 uSrc = col; + uint_fast16_t uSrc = col; // Blend func can save an operation if it knows uSrc MSB is // unset. For untextured prims, this is always true. @@ -276,7 +293,7 @@ static void gpuTileSpanFn(u16 *pDst, u32 count, u16 data) // unset. For untextured prims, this is always true. const bool skip_uSrc_mask = true; - u16 uSrc, uDst; + uint_fast16_t uSrc, uDst; do { if (CF_MASKCHECK || CF_BLEND) { uDst = *pDst; } @@ -339,10 +356,11 @@ static void gpuSpriteSpanFn(u16 *pDst, u32 count, u8* pTxt, u32 u0) { // Blend func can save an operation if it knows uSrc MSB is unset. // Untextured prims can always skip (source color always comes with MSB=0). - // For textured prims, lighting funcs always return it unset. (bonus!) - const bool skip_uSrc_mask = (!CF_TEXTMODE) || CF_LIGHT; + // For textured prims, the generic lighting funcs always return it unset. (bonus!) + const bool skip_uSrc_mask = MSB_PRESERVED ? (!CF_TEXTMODE) : (!CF_TEXTMODE) || CF_LIGHT; - u16 uSrc, uDst, srcMSB; + uint_fast16_t uSrc, uDst, srcMSB; + bool should_blend; u32 u0_mask = gpu_unai.TextureWindow[2]; u8 r5, g5, b5; @@ -384,12 +402,14 @@ static void gpuSpriteSpanFn(u16 *pDst, u32 count, u8* pTxt, u32 u0) if (CF_LIGHT) uSrc = gpuLightingTXT(uSrc, r5, g5, b5); - if (CF_BLEND && srcMSB) + should_blend = MSB_PRESERVED ? uSrc & 0x8000 : srcMSB; + + if (CF_BLEND && should_blend) uSrc = gpuBlending<CF_BLENDMODE, skip_uSrc_mask>(uSrc, uDst); - if (CF_MASKSET) { *pDst = uSrc | 0x8000; } - else if (CF_BLEND || CF_LIGHT) { *pDst = uSrc | srcMSB; } - else { *pDst = uSrc; } + if (CF_MASKSET) { *pDst = uSrc | 0x8000; } + else if (!MSB_PRESERVED && (CF_BLEND || CF_LIGHT)) { *pDst = uSrc | srcMSB; } + else { *pDst = uSrc; } endsprite: u0 += (CF_TEXTMODE==3) ? 2 : 1; @@ -466,8 +486,9 @@ static void gpuPolySpanFn(const gpu_unai_t &gpu_unai, u16 *pDst, u32 count) { // Blend func can save an operation if it knows uSrc MSB is unset. // Untextured prims can always skip this (src color MSB is always 0). - // For textured prims, lighting funcs always return it unset. (bonus!) - const bool skip_uSrc_mask = (!CF_TEXTMODE) || CF_LIGHT; + // For textured prims, the generic lighting funcs always return it unset. (bonus!) + const bool skip_uSrc_mask = MSB_PRESERVED ? (!CF_TEXTMODE) : (!CF_TEXTMODE) || CF_LIGHT; + bool should_blend; u32 bMsk; if (CF_BLITMASK) bMsk = gpu_unai.blit_mask; @@ -478,7 +499,7 @@ static void gpuPolySpanFn(const gpu_unai_t &gpu_unai, u16 *pDst, u32 count) // UNTEXTURED, NO GOURAUD const u16 pix15 = gpu_unai.PixelData; do { - u16 uSrc, uDst; + uint_fast16_t uSrc, uDst; // NOTE: Don't enable CF_BLITMASK pixel skipping (speed hack) // on untextured polys. It seems to do more harm than good: see @@ -507,7 +528,7 @@ endpolynotextnogou: u32 l_gInc = gpu_unai.gInc; do { - u16 uDst, uSrc; + uint_fast16_t uDst, uSrc; // See note in above loop regarding CF_BLITMASK //if (CF_BLITMASK) { if ((bMsk>>((((uintptr_t)pDst)>>1)&7))&1) goto endpolynotextgou; } @@ -545,7 +566,7 @@ endpolynotextgou: { // TEXTURED - u16 uDst, uSrc, srcMSB; + uint_fast16_t uDst, uSrc, srcMSB; //senquack - note: original UNAI code had gpu_unai.{u4/v4} packed into // one 32-bit unsigned int, but this proved to lose too much accuracy @@ -632,13 +653,14 @@ endpolynotextgou: uSrc = gpuLightingTXT(uSrc, r5, g5, b5); } - if (CF_BLEND && srcMSB) + should_blend = MSB_PRESERVED ? uSrc & 0x8000 : srcMSB; + if (CF_BLEND && should_blend) uSrc = gpuBlending<CF_BLENDMODE, skip_uSrc_mask>(uSrc, uDst); } - if (CF_MASKSET) { *pDst = uSrc | 0x8000; } - else if (CF_BLEND || CF_LIGHT) { *pDst = uSrc | srcMSB; } - else { *pDst = uSrc; } + if (CF_MASKSET) { *pDst = uSrc | 0x8000; } + else if (!MSB_PRESERVED && (CF_BLEND || CF_LIGHT)) { *pDst = uSrc | srcMSB; } + else { *pDst = uSrc; } endpolytext: pDst++; l_u = (l_u + l_u_inc) & l_u_msk; diff --git a/plugins/gpu_unai/gpu_inner_blend.h b/plugins/gpu_unai/gpu_inner_blend.h index 93c268b..febc7ed 100644 --- a/plugins/gpu_unai/gpu_inner_blend.h +++ b/plugins/gpu_unai/gpu_inner_blend.h @@ -37,14 +37,14 @@ // Where '0' is zero-padding, and '-' is don't care //////////////////////////////////////////////////////////////////////////////// template <int BLENDMODE, bool SKIP_USRC_MSB_MASK> -GPU_INLINE u16 gpuBlending(u16 uSrc, u16 uDst) +GPU_INLINE uint_fast16_t gpuBlendingGeneric(uint_fast16_t uSrc, uint_fast16_t uDst) { // These use Blargg's bitwise modulo-clamping: // http://blargg.8bitalley.com/info/rgb_mixing.html // http://blargg.8bitalley.com/info/rgb_clamped_add.html // http://blargg.8bitalley.com/info/rgb_clamped_sub.html - u16 mix; + uint_fast16_t mix; // 0.5 x Back + 0.5 x Forward if (BLENDMODE==0) { @@ -113,7 +113,7 @@ GPU_INLINE u16 gpuBlending(u16 uSrc, u16 uDst) // ^ bit 31 // Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care //////////////////////////////////////////////////////////////////////////////// -GPU_INLINE u32 gpuGetRGB24(u16 uSrc) +GPU_INLINE u32 gpuGetRGB24(uint_fast16_t uSrc) { return ((uSrc & 0x7C00)<<14) | ((uSrc & 0x03E0)<< 9) @@ -137,7 +137,7 @@ GPU_INLINE u32 gpuGetRGB24(u16 uSrc) // Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care //////////////////////////////////////////////////////////////////////////////// template <int BLENDMODE> -GPU_INLINE u32 gpuBlending24(u32 uSrc24, u16 uDst) +GPU_INLINE u32 gpuBlending24(u32 uSrc24, uint_fast16_t uDst) { // These use techniques adapted from Blargg's techniques mentioned in // in gpuBlending() comments above. Not as much bitwise trickery is diff --git a/plugins/gpu_unai/gpu_inner_blend_arm.h b/plugins/gpu_unai/gpu_inner_blend_arm.h new file mode 100644 index 0000000..6413527 --- /dev/null +++ b/plugins/gpu_unai/gpu_inner_blend_arm.h @@ -0,0 +1,103 @@ +#ifndef _OP_BLEND_ARM_H_ +#define _OP_BLEND_ARM_H_ + +//////////////////////////////////////////////////////////////////////////////// +// Blend bgr555 color in 'uSrc' (foreground) with bgr555 color +// in 'uDst' (background), returning resulting color. +// +// INPUT: +// 'uSrc','uDst' input: -bbbbbgggggrrrrr +// ^ bit 16 +// OUTPUT: +// u16 output: 0bbbbbgggggrrrrr +// ^ bit 16 +// RETURNS: +// Where '0' is zero-padding, and '-' is don't care +//////////////////////////////////////////////////////////////////////////////// +template <int BLENDMODE, bool SKIP_USRC_MSB_MASK> +GPU_INLINE uint_fast16_t gpuBlendingARM(uint_fast16_t uSrc, uint_fast16_t uDst) +{ + // These use Blargg's bitwise modulo-clamping: + // http://blargg.8bitalley.com/info/rgb_mixing.html + // http://blargg.8bitalley.com/info/rgb_clamped_add.html + // http://blargg.8bitalley.com/info/rgb_clamped_sub.html + + uint_fast16_t mix; + + // Clear preserved msb + asm ("bic %[uDst], %[uDst], #0x8000" : [uDst] "+r" (uDst)); + + if (BLENDMODE == 3) { + // Prepare uSrc for blending ((0.25 * uSrc) & (0.25 * mask)) + asm ("and %[uSrc], %[mask], %[uSrc], lsr #0x2" : [uSrc] "+r" (uSrc) : [mask] "r" (0x1ce7)); + } else if (!SKIP_USRC_MSB_MASK) { + asm ("bic %[uSrc], %[uSrc], #0x8000" : [uSrc] "+r" (uSrc)); + } + + + // 0.5 x Back + 0.5 x Forward + if (BLENDMODE==0) { + // mix = ((uSrc + uDst) - ((uSrc ^ uDst) & 0x0421)) >> 1; + asm ("eor %[mix], %[uSrc], %[uDst]\n\t" // uSrc ^ uDst + "and %[mix], %[mix], %[mask]\n\t" // ... & 0x0421 + "sub %[mix], %[uDst], %[mix]\n\t" // uDst - ... + "add %[mix], %[uSrc], %[mix]\n\t" // uSrc + ... + "mov %[mix], %[mix], lsr #0x1\n\t" // ... >> 1 + : [mix] "=&r" (mix) + : [uSrc] "r" (uSrc), [uDst] "r" (uDst), [mask] "r" (0x0421)); + } + + if (BLENDMODE == 1 || BLENDMODE == 3) { + // u32 sum = uSrc + uDst; + // u32 low_bits = (uSrc ^ uDst) & 0x0421; + // u32 carries = (sum - low_bits) & 0x8420; + // u32 modulo = sum - carries; + // u32 clamp = carries - (carries >> 5); + // mix = modulo | clamp; + + u32 sum; + + asm ("add %[sum], %[uSrc], %[uDst]\n\t" // sum = uSrc + uDst + "eor %[mix], %[uSrc], %[uDst]\n\t" // uSrc ^ uDst + "and %[mix], %[mix], %[mask]\n\t" // low_bits = (... & 0x0421) + "sub %[mix], %[sum], %[mix]\n\t" // sum - low_bits + "and %[mix], %[mix], %[mask], lsl #0x05\n\t" // carries = ... & 0x8420 + "sub %[sum], %[sum], %[mix] \n\t" // modulo = sum - carries + "sub %[mix], %[mix], %[mix], lsr #0x05\n\t" // clamp = carries - (carries >> 5) + "orr %[mix], %[sum], %[mix]" // mix = modulo | clamp + : [sum] "=&r" (sum), [mix] "=&r" (mix) + : [uSrc] "r" (uSrc), [uDst] "r" (uDst), [mask] "r" (0x0421)); + } + + // 1.0 x Back - 1.0 x Forward + if (BLENDMODE==2) { + u32 diff; + // u32 diff = uDst - uSrc + 0x8420; + // u32 low_bits = (uDst ^ uSrc) & 0x8420; + // u32 borrows = (diff - low_bits) & 0x8420; + // u32 modulo = diff - borrows; + // u32 clamp = borrows - (borrows >> 5); + // mix = modulo & clamp; + asm ("sub %[diff], %[uDst], %[uSrc]\n\t" // uDst - uSrc + "add %[diff], %[diff], %[mask]\n\t" // diff = ... + 0x8420 + "eor %[mix], %[uDst], %[uSrc]\n\t" // uDst ^ uSrc + "and %[mix], %[mix], %[mask]\n\t" // low_bits = ... & 0x8420 + "sub %[mix], %[diff], %[mix]\n\t" // diff - low_bits + "and %[mix], %[mix], %[mask]\n\t" // borrows = ... & 0x8420 + "sub %[diff], %[diff], %[mix]\n\t" // modulo = diff - borrows + "sub %[mix], %[mix], %[mix], lsr #0x05\n\t" // clamp = borrows - (borrows >> 5) + "and %[mix], %[diff], %[mix]" // mix = modulo & clamp + : [diff] "=&r" (diff), [mix] "=&r" (mix) + : [uSrc] "r" (uSrc), [uDst] "r" (uDst), [mask] "r" (0x8420)); + } + + // There's not a case where we can get into this function, + // SKIP_USRC_MSB_MASK is false, and the msb of uSrc is unset. + if (!SKIP_USRC_MSB_MASK) { + asm ("orr %[mix], %[mix], #0x8000" : [mix] "+r" (mix)); + } + + return mix; +} + +#endif //_OP_BLEND_ARM_H_ diff --git a/plugins/gpu_unai/gpu_inner_light.h b/plugins/gpu_unai/gpu_inner_light.h index b041dc3..f90e8ec 100644 --- a/plugins/gpu_unai/gpu_inner_light.h +++ b/plugins/gpu_unai/gpu_inner_light.h @@ -127,7 +127,7 @@ GPU_INLINE u32 gpuPackGouraudColInc(s32 dr, s32 dg, s32 db) // ^ bit 16 // Where 'r,g,b' are integer bits of colors, 'X' fixed-pt, and '0' zero //////////////////////////////////////////////////////////////////////////////// -GPU_INLINE u16 gpuLightingRGB(u32 gCol) +GPU_INLINE uint_fast16_t gpuLightingRGBGeneric(u32 gCol) { return ((gCol<< 5)&0x7C00) | ((gCol>>11)&0x03E0) | @@ -168,7 +168,7 @@ GPU_INLINE u32 gpuLightingRGB24(u32 gCol) // u16 output: 0bbbbbgggggrrrrr // Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care //////////////////////////////////////////////////////////////////////////////// -GPU_INLINE u16 gpuLightingTXT(u16 uSrc, u8 r5, u8 g5, u8 b5) +GPU_INLINE uint_fast16_t gpuLightingTXTGeneric(uint_fast16_t uSrc, u8 r5, u8 g5, u8 b5) { return (gpu_unai.LightLUT[((uSrc&0x7C00)>>5) | b5] << 10) | (gpu_unai.LightLUT[ (uSrc&0x03E0) | g5] << 5) | @@ -190,7 +190,7 @@ GPU_INLINE u16 gpuLightingTXT(u16 uSrc, u8 r5, u8 g5, u8 b5) // u16 output: 0bbbbbgggggrrrrr // Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care //////////////////////////////////////////////////////////////////////////////// -GPU_INLINE u16 gpuLightingTXTGouraud(u16 uSrc, u32 gCol) +GPU_INLINE uint_fast16_t gpuLightingTXTGouraudGeneric(uint_fast16_t uSrc, u32 gCol) { return (gpu_unai.LightLUT[((uSrc&0x7C00)>>5) | ((gCol>> 5)&0x1F)]<<10) | (gpu_unai.LightLUT[ (uSrc&0x03E0) | ((gCol>>16)&0x1F)]<< 5) | @@ -214,15 +214,15 @@ GPU_INLINE u16 gpuLightingTXTGouraud(u16 uSrc, u32 gCol) // ^ bit 31 // Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care //////////////////////////////////////////////////////////////////////////////// -GPU_INLINE u32 gpuLightingTXT24(u16 uSrc, u8 r8, u8 g8, u8 b8) +GPU_INLINE u32 gpuLightingTXT24(uint_fast16_t uSrc, u8 r8, u8 g8, u8 b8) { - u16 r1 = uSrc&0x001F; - u16 g1 = uSrc&0x03E0; - u16 b1 = uSrc&0x7C00; + uint_fast16_t r1 = uSrc&0x001F; + uint_fast16_t g1 = uSrc&0x03E0; + uint_fast16_t b1 = uSrc&0x7C00; - u16 r2 = r8; - u16 g2 = g8; - u16 b2 = b8; + uint_fast16_t r2 = r8; + uint_fast16_t g2 = g8; + uint_fast16_t b2 = b8; u32 r3 = r1 * r2; if (r3 & 0xFFFFF000) r3 = ~0xFFFFF000; u32 g3 = g1 * g2; if (g3 & 0xFFFE0000) g3 = ~0xFFFE0000; @@ -249,15 +249,15 @@ GPU_INLINE u32 gpuLightingTXT24(u16 uSrc, u8 r8, u8 g8, u8 b8) // ^ bit 31 // Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care //////////////////////////////////////////////////////////////////////////////// -GPU_INLINE u32 gpuLightingTXT24Gouraud(u16 uSrc, u32 gCol) +GPU_INLINE u32 gpuLightingTXT24Gouraud(uint_fast16_t uSrc, u32 gCol) { - u16 r1 = uSrc&0x001F; - u16 g1 = uSrc&0x03E0; - u16 b1 = uSrc&0x7C00; + uint_fast16_t r1 = uSrc&0x001F; + uint_fast16_t g1 = uSrc&0x03E0; + uint_fast16_t b1 = uSrc&0x7C00; - u16 r2 = (gCol>>24) & 0xFF; - u16 g2 = (gCol>>13) & 0xFF; - u16 b2 = (gCol>> 2) & 0xFF; + uint_fast16_t r2 = (gCol>>24) & 0xFF; + uint_fast16_t g2 = (gCol>>13) & 0xFF; + uint_fast16_t b2 = (gCol>> 2) & 0xFF; u32 r3 = r1 * r2; if (r3 & 0xFFFFF000) r3 = ~0xFFFFF000; u32 g3 = g1 * g2; if (g3 & 0xFFFE0000) g3 = ~0xFFFE0000; diff --git a/plugins/gpu_unai/gpu_inner_light_arm.h b/plugins/gpu_unai/gpu_inner_light_arm.h new file mode 100644 index 0000000..7bd5890 --- /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_unai.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_unai.LightLUT), "0" (out), [src] "r" (uSrc) + : "cc"); + + return out; +} + +#endif //_OP_LIGHT_ARM_H_ |