/*************************************************************************** Atari Jaguar blitter **************************************************************************** How to use this module: #define FUNCNAME -- name of the function to be generated #define COMMAND -- blitter command bits for blitter #define A1FIXED -- fixed A1 flag bits for blitter #define A2FIXED -- fixed A2 flag bits for blitter #include "jagblit.c" ****************************************************************************/ #ifndef FUNCNAME #error jagblit.c -- requires FUNCNAME to be predefined #endif #ifndef COMMAND #error jagblit.c -- requires COMMAND to be predefined #endif #ifndef A1FIXED #error jagblit.c -- requires A1FIXED to be predefined #endif #ifndef A2FIXED #error jagblit.c -- requires A2FIXED to be predefined #endif #ifndef PIXEL_SHIFT_1 #define PIXEL_SHIFT_1(a) ((~a##_x >> 16) & 7) #define PIXEL_OFFSET_1(a) BYTE4_XOR_BE(((UINT32)a##_y >> 16) * a##_width / 8 + (((UINT32)a##_x >> 19) & ~7) * (1 + a##_pitch) + (((UINT32)a##_x >> 19) & 7)) #define ZDATA_OFFSET_1(a) 0 /* huh? */ #define READ_RDATA_1(r,a,p) ((p) ? (((((UINT8 *)&blitter_regs[r])[BYTE4_XOR_BE(((UINT32)a##_x >> 19) & 7)]) >> PIXEL_SHIFT_1(a)) & 0x01) : (blitter_regs[r] & 0x01)) #define READ_PIXEL_1(a) (((((UINT8 *)a##_base_mem)[PIXEL_OFFSET_1(a)]) >> PIXEL_SHIFT_1(a)) & 0x01) #define READ_ZDATA_1(a) 0 /* huh? */ #define WRITE_PIXEL_1(a,d) do { UINT8 *pix = &((UINT8 *)a##_base_mem)[PIXEL_OFFSET_1(a)]; *pix = (*pix & ~(0x01 << PIXEL_SHIFT_1(a))) | ((d) << PIXEL_SHIFT_1(a)); } while (0) #define WRITE_ZDATA_1(a,d) /* huh? */ #define PIXEL_SHIFT_2(a) ((~a##_x >> 15) & 6) #define PIXEL_OFFSET_2(a) BYTE4_XOR_BE(((UINT32)a##_y >> 16) * a##_width / 4 + (((UINT32)a##_x >> 18) & ~7) * (1 + a##_pitch) + (((UINT32)a##_x >> 18) & 7)) #define ZDATA_OFFSET_2(a) 0 /* huh? */ #define READ_RDATA_2(r,a,p) ((p) ? (((((UINT8 *)&blitter_regs[r])[BYTE4_XOR_BE(((UINT32)a##_x >> 18) & 7)]) >> PIXEL_SHIFT_2(a)) & 0x03) : (blitter_regs[r] & 0x03)) #define READ_PIXEL_2(a) (((((UINT8 *)a##_base_mem)[PIXEL_OFFSET_2(a)]) >> PIXEL_SHIFT_2(a)) & 0x03) #define READ_ZDATA_2(a) 0 /* huh? */ #define WRITE_PIXEL_2(a,d) do { UINT8 *pix = &((UINT8 *)a##_base_mem)[PIXEL_OFFSET_2(a)]; *pix = (*pix & ~(0x03 << PIXEL_SHIFT_2(a))) | ((d) << PIXEL_SHIFT_2(a)); } while (0) #define WRITE_ZDATA_2(a,d) /* huh? */ #define PIXEL_SHIFT_4(a) ((~a##_x >> 14) & 4) #define PIXEL_OFFSET_4(a) BYTE4_XOR_BE(((UINT32)a##_y >> 16) * a##_width / 2 + (((UINT32)a##_x >> 17) & ~7) * (1 + a##_pitch) + (((UINT32)a##_x >> 17) & 7)) #define ZDATA_OFFSET_4(a) 0 /* huh? */ #define READ_RDATA_4(r,a,p) ((p) ? (((((UINT8 *)&blitter_regs[r])[BYTE4_XOR_BE(((UINT32)a##_x >> 17) & 7)]) >> PIXEL_SHIFT_4(a)) & 0x0f) : (blitter_regs[r] & 0x0f)) #define READ_PIXEL_4(a) (((((UINT8 *)a##_base_mem)[PIXEL_OFFSET_4(a)]) >> PIXEL_SHIFT_4(a)) & 0x0f) #define READ_ZDATA_4(a) 0 /* huh? */ #define WRITE_PIXEL_4(a,d) do { UINT8 *pix = &((UINT8 *)a##_base_mem)[PIXEL_OFFSET_4(a)]; *pix = (*pix & ~(0x0f << PIXEL_SHIFT_4(a))) | ((d) << PIXEL_SHIFT_4(a)); } while (0) #define WRITE_ZDATA_4(a,d) /* huh? */ #define PIXEL_OFFSET_8(a) BYTE4_XOR_BE(((UINT32)a##_y >> 16) * a##_width + (((UINT32)a##_x >> 16) & ~7) * (1 + a##_pitch) + (((UINT32)a##_x >> 16) & 7)) #define ZDATA_OFFSET_8(a) (PIXEL_OFFSET_8(a) + a##_zoffs * 8) #define READ_RDATA_8(r,a,p) ((p) ? (((UINT8 *)&blitter_regs[r])[BYTE4_XOR_BE(((UINT32)a##_x >> 16) & 7)]) : (blitter_regs[r] & 0xff)) #define READ_PIXEL_8(a) (((UINT8 *)a##_base_mem)[PIXEL_OFFSET_8(a)]) #define READ_ZDATA_8(a) (((UINT8 *)a##_base_mem)[ZDATA_OFFSET_8(a)]) #define WRITE_PIXEL_8(a,d) do { ((UINT8 *)a##_base_mem)[PIXEL_OFFSET_8(a)] = (d); } while (0) #define WRITE_ZDATA_8(a,d) do { ((UINT8 *)a##_base_mem)[ZDATA_OFFSET_8(a)] = (d); } while (0) #define PIXEL_OFFSET_16(a) BYTE_XOR_BE(((UINT32)a##_y >> 16) * a##_width + (((UINT32)a##_x >> 16) & ~3) * (1 + a##_pitch) + (((UINT32)a##_x >> 16) & 3)) #define ZDATA_OFFSET_16(a) (PIXEL_OFFSET_16(a) + a##_zoffs * 4) #define READ_RDATA_16(r,a,p) ((p) ? (((UINT16 *)&blitter_regs[r])[BYTE_XOR_BE(((UINT32)a##_x >> 16) & 3)]) : (blitter_regs[r] & 0xffff)) #define READ_PIXEL_16(a) (((UINT16 *)a##_base_mem)[PIXEL_OFFSET_16(a)]) #define READ_ZDATA_16(a) (((UINT16 *)a##_base_mem)[ZDATA_OFFSET_16(a)]) #define WRITE_PIXEL_16(a,d) do { ((UINT16 *)a##_base_mem)[PIXEL_OFFSET_16(a)] = (d); } while (0) #define WRITE_ZDATA_16(a,d) do { ((UINT16 *)a##_base_mem)[ZDATA_OFFSET_16(a)] = (d); } while (0) #define PIXEL_OFFSET_32(a) (((UINT32)a##_y >> 16) * a##_width + (((UINT32)a##_x >> 16) & ~1) * (1 + a##_pitch) + (((UINT32)a##_x >> 16) & 1)) #define ZDATA_OFFSET_32(a) (PIXEL_OFFSET_32(a) + a##_zoffs * 2) #define READ_RDATA_32(r,a,p) ((p) ? (blitter_regs[r + (((UINT32)a##_x >> 16) & 1)]) : blitter_regs[r]) #define READ_PIXEL_32(a) (((UINT32 *)a##_base_mem)[PIXEL_OFFSET_32(a)]) #define READ_ZDATA_32(a) (((UINT32 *)a##_base_mem)[ZDATA_OFFSET_32(a)]) #define WRITE_PIXEL_32(a,d) do { ((UINT32 *)a##_base_mem)[PIXEL_OFFSET_32(a)] = (d); } while (0) #define WRITE_ZDATA_32(a,d) do { ((UINT32 *)a##_base_mem)[ZDATA_OFFSET_32(a)] = (d); } while (0) #define READ_RDATA(r,a,f,p) \ ((((f) & 0x38) == (0 << 3)) ? (READ_RDATA_1(r,a,p)) : \ (((f) & 0x38) == (1 << 3)) ? (READ_RDATA_2(r,a,p)) : \ (((f) & 0x38) == (2 << 3)) ? (READ_RDATA_4(r,a,p)) : \ (((f) & 0x38) == (3 << 3)) ? (READ_RDATA_8(r,a,p)) : \ (((f) & 0x38) == (4 << 3)) ? (READ_RDATA_16(r,a,p)) : \ (((f) & 0x38) == (5 << 3)) ? (READ_RDATA_32(r,a,p)) : 0) #define READ_PIXEL(a,f) \ ((((f) & 0x38) == (0 << 3)) ? (READ_PIXEL_1(a)) : \ (((f) & 0x38) == (1 << 3)) ? (READ_PIXEL_2(a)) : \ (((f) & 0x38) == (2 << 3)) ? (READ_PIXEL_4(a)) : \ (((f) & 0x38) == (3 << 3)) ? (READ_PIXEL_8(a)) : \ (((f) & 0x38) == (4 << 3)) ? (READ_PIXEL_16(a)) : \ (((f) & 0x38) == (5 << 3)) ? (READ_PIXEL_32(a)) : 0) #define READ_ZDATA(a,f) \ ((((f) & 0x38) == (0 << 3)) ? (READ_ZDATA_1(a)) : \ (((f) & 0x38) == (1 << 3)) ? (READ_ZDATA_2(a)) : \ (((f) & 0x38) == (2 << 3)) ? (READ_ZDATA_4(a)) : \ (((f) & 0x38) == (3 << 3)) ? (READ_ZDATA_8(a)) : \ (((f) & 0x38) == (4 << 3)) ? (READ_ZDATA_16(a)) : \ (((f) & 0x38) == (5 << 3)) ? (READ_ZDATA_32(a)) : 0) #define WRITE_PIXEL(a,f,d) \ do \ { \ if (((f) & 0x38) == (0 << 3)) WRITE_PIXEL_1(a,d); \ else if (((f) & 0x38) == (1 << 3)) WRITE_PIXEL_2(a,d); \ else if (((f) & 0x38) == (2 << 3)) WRITE_PIXEL_4(a,d); \ else if (((f) & 0x38) == (3 << 3)) WRITE_PIXEL_8(a,d); \ else if (((f) & 0x38) == (4 << 3)) WRITE_PIXEL_16(a,d); \ else if (((f) & 0x38) == (5 << 3)) WRITE_PIXEL_32(a,d); \ } while (0) #define WRITE_ZDATA(a,f,d) \ do \ { \ if (((f) & 0x38) == (0 << 3)) WRITE_ZDATA_1(a,d); \ else if (((f) & 0x38) == (1 << 3)) WRITE_ZDATA_2(a,d); \ else if (((f) & 0x38) == (2 << 3)) WRITE_ZDATA_4(a,d); \ else if (((f) & 0x38) == (3 << 3)) WRITE_ZDATA_8(a,d); \ else if (((f) & 0x38) == (4 << 3)) WRITE_ZDATA_16(a,d); \ else if (((f) & 0x38) == (5 << 3)) WRITE_ZDATA_32(a,d); \ } while (0) #endif static void FUNCNAME(running_machine &machine, UINT32 command, UINT32 a1flags, UINT32 a2flags) { UINT32 a1_base = blitter_regs[A1_BASE]; INT32 a1_pitch = (A1FIXED & 3) ^ ((A1FIXED & 2) >> 1); INT32 a1_zoffs = (A1FIXED >> 6) & 7; INT32 a1_width = ((4 | ((a1flags >> 9) & 3)) << ((a1flags >> 11) & 15)) >> 2; INT32 a1_xadd = (A1FIXED >> 16) & 0x03; INT32 a1_yadd = (A1FIXED >> 18) & 0x01; INT32 a1_x = (blitter_regs[A1_PIXEL] << 16) | (blitter_regs[A1_FPIXEL] & 0xffff); INT32 a1_y = (blitter_regs[A1_PIXEL] & 0xffff0000) | (blitter_regs[A1_FPIXEL] >> 16); INT32 a1_xstep = 0; INT32 a1_ystep = 0; UINT32 a1_xmask = 0xffffffff; UINT32 a1_ymask = 0xffffffff; UINT32 a2_base = blitter_regs[A2_BASE]; INT32 a2_pitch = (A2FIXED & 3) ^ ((A2FIXED & 2) >> 1); INT32 a2_zoffs = (A2FIXED >> 6) & 7; INT32 a2_width = ((4 | ((a2flags >> 9) & 3)) << ((a2flags >> 11) & 15)) >> 2; INT32 a2_xadd = (A2FIXED >> 16) & 0x03; INT32 a2_yadd = (A2FIXED >> 18) & 0x01; INT32 a2_x = (blitter_regs[A2_PIXEL] << 16); INT32 a2_y = (blitter_regs[A2_PIXEL] & 0xffff0000); INT32 a2_xstep = 0; INT32 a2_ystep = 0; UINT32 a2_xmask = 0xffffffff; UINT32 a2_ymask = 0xffffffff; int inner_count = blitter_regs[B_COUNT] & 0xffff; int outer_count = blitter_regs[B_COUNT] >> 16; int inner, outer; UINT8 a1_phrase_mode = 0; UINT8 a2_phrase_mode = 0; void *a1_base_mem = get_jaguar_memory(machine, a1_base); void *a2_base_mem = get_jaguar_memory(machine, a2_base); void *asrc_base_mem = (COMMAND & 0x00000800) ? a1_base_mem : a2_base_mem; UINT32 asrcflags = (COMMAND & 0x00000800) ? A1FIXED : A2FIXED; INT32 asrc_x = (COMMAND & 0x00000800) ? a1_x : a2_x; INT32 asrc_y = (COMMAND & 0x00000800) ? a1_y : a2_y; INT32 asrc_width = (COMMAND & 0x00000800) ? a1_width : a2_width; INT32 asrc_pitch = (COMMAND & 0x00000800) ? a1_pitch : a2_pitch; INT32 asrc_zoffs = (COMMAND & 0x00000800) ? a1_zoffs : a2_zoffs; UINT8 asrc_phrase_mode; INT32 asrc_xadd, asrc_xstep, asrc_yadd, asrc_ystep; UINT32 asrc_xmask, asrc_ymask; void *adest_base_mem = (COMMAND & 0x00000800) ? a2_base_mem : a1_base_mem; UINT32 adestflags = (COMMAND & 0x00000800) ? A2FIXED : A1FIXED; INT32 adest_x = (COMMAND & 0x00000800) ? a2_x : a1_x; INT32 adest_y = (COMMAND & 0x00000800) ? a2_y : a1_y; INT32 adest_width = (COMMAND & 0x00000800) ? a2_width : a1_width; INT32 adest_pitch = (COMMAND & 0x00000800) ? a2_pitch : a1_pitch; INT32 adest_zoffs = (COMMAND & 0x00000800) ? a2_zoffs : a1_zoffs; UINT8 adest_phrase_mode; INT32 adest_xadd, adest_xstep, adest_yadd, adest_ystep; UINT32 adest_xmask, adest_ymask; /* don't blit if pointer bad */ if (!a1_base_mem || !a2_base_mem) { if (LOG_BAD_BLITS) { logerror("%s:Blit!\n", machine.describe_context()); logerror(" a1_base = %08X\n", a1_base); logerror(" a2_base = %08X\n", a2_base); } return; } /* determine actual xadd/yadd for A1 */ a1_yadd <<= 16; if (A1FIXED & 0x00100000) a1_yadd = -a1_yadd; a1_phrase_mode = (a1_xadd == 0); if (a1_xadd == 3) { a1_xadd = (blitter_regs[A1_INC] << 16) | (blitter_regs[A1_FINC] & 0xffff); a1_yadd = (blitter_regs[A1_INC] & 0xffff0000) | (blitter_regs[A1_FINC] >> 16); } else if (a1_xadd == 2) a1_xadd = 0; else a1_xadd = 1 << 16; if (A1FIXED & 0x00080000) a1_xadd = -a1_xadd; /* determine actual xadd/yadd for A2 */ a2_yadd <<= 16; if (A2FIXED & 0x00100000) a2_yadd = -a2_yadd; a2_phrase_mode = (a2_xadd == 0); if (a2_xadd == 2) a2_xadd = 0; else a2_xadd = 1 << 16; if (A2FIXED & 0x00080000) a2_xadd = -a2_xadd; /* set up the A2 mask */ if (A2FIXED & 0x00008000) { a2_xmask = ((blitter_regs[A2_MASK] & 0x0000ffff) << 16) | 0xffff; a2_ymask = (blitter_regs[A2_MASK] & 0xffff0000) | 0xffff; } /* modify outer loop steps based on command */ if (command & 0x00000100) { a1_xstep = blitter_regs[A1_FSTEP] & 0xffff; a1_ystep = blitter_regs[A1_FSTEP] >> 16; } if (command & 0x00000200) { a1_xstep += blitter_regs[A1_STEP] << 16; a1_ystep += blitter_regs[A1_STEP] & 0xffff0000; } if (command & 0x00000400) { a2_xstep = blitter_regs[A2_STEP] << 16; a2_ystep = blitter_regs[A2_STEP] & 0xffff0000; } asrc_phrase_mode = (COMMAND & 0x00000800) ? a1_phrase_mode : a2_phrase_mode; asrc_xstep = (COMMAND & 0x00000800) ? a1_xstep : a2_xstep; asrc_ystep = (COMMAND & 0x00000800) ? a1_ystep : a2_ystep; asrc_xadd = (COMMAND & 0x00000800) ? a1_xadd : a2_xadd; asrc_yadd = (COMMAND & 0x00000800) ? a1_yadd : a2_yadd; asrc_xmask = (COMMAND & 0x00000800) ? a1_xmask : a2_xmask; asrc_ymask = (COMMAND & 0x00000800) ? a1_ymask : a2_ymask; adest_phrase_mode = (COMMAND & 0x00000800) ? a2_phrase_mode : a1_phrase_mode; adest_xstep = (COMMAND & 0x00000800) ? a2_xstep : a1_xstep; adest_ystep = (COMMAND & 0x00000800) ? a2_ystep : a1_ystep; adest_xadd = (COMMAND & 0x00000800) ? a2_xadd : a1_xadd; adest_yadd = (COMMAND & 0x00000800) ? a2_yadd : a1_yadd; adest_xmask = (COMMAND & 0x00000800) ? a2_xmask : a1_xmask; adest_ymask = (COMMAND & 0x00000800) ? a2_ymask : a1_ymask; if (LOG_BLITS) { logerror("%s:Blit!\n", machine.describe_context()); logerror(" a1_base = %08X\n", a1_base); logerror(" a1_pitch = %d\n", a1_pitch); logerror(" a1_psize = %d\n", 1 << ((A1FIXED >> 3) & 7)); logerror(" a1_width = %d\n", a1_width); logerror(" a1_xadd = %f (phrase=%d)\n", (float)a1_xadd / 65536.0, a1_phrase_mode); logerror(" a1_yadd = %f\n", (float)a1_yadd / 65536.0); logerror(" a1_xstep = %f\n", (float)a1_xstep / 65536.0); logerror(" a1_ystep = %f\n", (float)a1_ystep / 65536.0); logerror(" a1_x = %f\n", (float)a1_x / 65536.0); logerror(" a1_y = %f\n", (float)a1_y / 65536.0); logerror(" a2_base = %08X\n", a2_base); logerror(" a2_pitch = %d\n", a2_pitch); logerror(" a2_psize = %d\n", 1 << ((A2FIXED >> 3) & 7)); logerror(" a2_width = %d\n", a2_width); logerror(" a2_xadd = %f (phrase=%d)\n", (float)a2_xadd / 65536.0, a2_phrase_mode); logerror(" a2_yadd = %f\n", (float)a2_yadd / 65536.0); logerror(" a2_xstep = %f\n", (float)a2_xstep / 65536.0); logerror(" a2_ystep = %f\n", (float)a2_ystep / 65536.0); logerror(" a2_x = %f\n", (float)a2_x / 65536.0); logerror(" a2_y = %f\n", (float)a2_y / 65536.0); logerror(" count = %d x %d\n", inner_count, outer_count); logerror(" command = %08X\n", COMMAND); } /* check for unhandled command bits */ if (LOG_UNHANDLED_BLITS && (COMMAND & 0x24003000)) logerror("Blitter unhandled: these command bits: %08X\n", COMMAND & 0x24003000); /* top of the outer loop */ outer = outer_count; while (outer--) { /* top of the inner loop */ inner = inner_count; while (inner--) { UINT32 srcdata; UINT32 srczdata = 0; UINT32 dstdata; UINT32 dstzdata = 0; UINT32 writedata = 0; int inhibit = 0; /* load src data and Z */ if (COMMAND & 0x00000001) { srcdata = READ_PIXEL(asrc, asrcflags); if (COMMAND & 0x00000002) srczdata = READ_ZDATA(asrc, asrcflags); else if (COMMAND & 0x001c020) srczdata = READ_RDATA(B_SRCZ1_H, asrc, asrcflags, asrc_phrase_mode); } else { srcdata = READ_RDATA(B_SRCD_H, asrc, asrcflags, asrc_phrase_mode); if (COMMAND & 0x001c020) srczdata = READ_RDATA(B_SRCZ1_H, asrc, asrcflags, asrc_phrase_mode); } /* load dst data and Z */ if (COMMAND & 0x00000008) { dstdata = READ_PIXEL(adest, adestflags); if (COMMAND & 0x00000010) dstzdata = READ_ZDATA(adest, adestflags); else dstzdata = READ_RDATA(B_DSTZ_H, adest, adestflags, adest_phrase_mode); } else { dstdata = READ_RDATA(B_DSTD_H, adest, adestflags, adest_phrase_mode); if (COMMAND & 0x00000010) dstzdata = READ_RDATA(B_DSTZ_H, adest, adestflags, adest_phrase_mode); } /* handle clipping */ if (COMMAND & 0x00000040) { if (adest_x < 0 || adest_y < 0 || (adest_x >> 16) >= (blitter_regs[A1_CLIP] & 0x7fff) || (adest_y >> 16) >= ((blitter_regs[A1_CLIP] >> 16) & 0x7fff)) inhibit = 1; } /* apply Z comparator */ if (COMMAND & 0x00040000) if (srczdata < dstzdata) inhibit = 1; if (COMMAND & 0x00080000) if (srczdata == dstzdata) inhibit = 1; if (COMMAND & 0x00100000) if (srczdata > dstzdata) inhibit = 1; /* apply data comparator */ if (COMMAND & 0x08000000) { if (!(COMMAND & 0x02000000)) { if (srcdata == READ_RDATA(B_PATD_H, asrc, asrcflags, asrc_phrase_mode)) inhibit = 1; } else { if (dstdata == READ_RDATA(B_PATD_H, adest, adestflags, adest_phrase_mode)) inhibit = 1; } } /* compute the write data and store */ if (!inhibit) { /* handle patterns/additive/LFU */ if (COMMAND & 0x00010000) writedata = READ_RDATA(B_PATD_H, adest, adestflags, adest_phrase_mode); else if (COMMAND & 0x00020000) { writedata = (srcdata & 0xff) + (dstdata & 0xff); if (!(COMMAND & 0x00004000) && writedata > 0xff) writedata = 0xff; writedata |= (srcdata & 0xf00) + (dstdata & 0xf00); if (!(COMMAND & 0x00008000) && writedata > 0xfff) writedata = 0xfff; writedata |= (srcdata & 0xf000) + (dstdata & 0xf000); } else { if (COMMAND & 0x00200000) writedata |= ~srcdata & ~dstdata; if (COMMAND & 0x00400000) writedata |= ~srcdata & dstdata; if (COMMAND & 0x00800000) writedata |= srcdata & ~dstdata; if (COMMAND & 0x01000000) writedata |= srcdata & dstdata; } /* handle source shading */ if (COMMAND & 0x40000000) { int intensity = srcdata & 0x00ff; intensity += (INT8) (blitter_regs[B_Z3] >> 16); if (intensity < 0) intensity = 0; else if (intensity > 0xff) intensity = 0xff; writedata = (srcdata & 0xff00) | intensity; } } else writedata = dstdata; if (adest_phrase_mode || (command & 0x10000000) || !inhibit) { /* write to the destination */ WRITE_PIXEL(adest, adestflags, writedata); if (COMMAND & 0x00000020) WRITE_ZDATA(adest, adestflags, srczdata); } /* update X/Y */ asrc_x = (asrc_x + asrc_xadd) & asrc_xmask; asrc_y = (asrc_y + asrc_yadd) & asrc_ymask; adest_x = (adest_x + adest_xadd) & adest_xmask; adest_y = (adest_y + adest_yadd) & adest_ymask; } /* adjust for phrase mode */ if (asrc_phrase_mode) { if (asrc_xadd > 0) asrc_x += 3 << 16; else asrc_x -= 3 << 16; asrc_x &= ~(3 << 16); } if (adest_phrase_mode) { if (adest_xadd > 0) adest_x += 3 << 16; else adest_x -= 3 << 16; adest_x &= ~(3 << 16); } /* update for outer loop */ asrc_x += asrc_xstep; asrc_y += asrc_ystep; adest_x += adest_xstep; adest_y += adest_ystep; } /* write values back to registers */ a1_x = (COMMAND & 0x00000800) ? asrc_x : adest_x; a1_y = (COMMAND & 0x00000800) ? asrc_y : adest_y; a2_x = (COMMAND & 0x00000800) ? adest_x : asrc_x; a2_y = (COMMAND & 0x00000800) ? adest_y : asrc_y; blitter_regs[A1_PIXEL] = (a1_y & 0xffff0000) | ((a1_x >> 16) & 0xffff); blitter_regs[A1_FPIXEL] = (a1_y << 16) | (a1_x & 0xffff); blitter_regs[A2_PIXEL] = (a2_y & 0xffff0000) | ((a2_x >> 16) & 0xffff); }