-// TODO...
+// This is a direct rewrite of gfx_cd.asm (x86 asm to C).
+// You can even find some x86 register names :)
+// Original code (c) 2002 by Stéphane Dallongeville
+
+// (c) Copyright 2007, Grazvydas "notaz" Ignotas
+
-// #include <string.h>
#include "../PicoInt.h"
-#define rot_comp Pico_mcd->rot_comp
+#define _rot_comp Pico_mcd->rot_comp
-static int Table_Rot_Time[] =
+static const int Table_Rot_Time[] =
{
0x00054000, 0x00048000, 0x00040000, 0x00036000, //; 008-032 ; briefing - sprite
0x0002E000, 0x00028000, 0x00024000, 0x00022000, //; 036-064 ; arbre souvent
};
-#if 1*0
-typedef struct
-{
- unsigned int Reg_58; // Stamp_Size
- unsigned int Reg_5A;
- unsigned int Reg_5C;
- unsigned int Reg_5E;
- unsigned int Reg_60;
- unsigned int Reg_62;
- unsigned int Reg_64; // V_Dot
- unsigned int Reg_66;
-
- unsigned int Stamp_Map_Adr;
- unsigned int Buffer_Adr;
- unsigned int Vector_Adr;
- unsigned int Jmp_Adr;
- unsigned int Float_Part;
- unsigned int Draw_Speed;
-
- unsigned int XS;
- unsigned int YS;
- unsigned int DXS;
- unsigned int DYS;
- unsigned int XD;
- unsigned int YD;
- unsigned int XD_Mul;
- unsigned int H_Dot;
-} Rot_Comp;
-#endif
-
static void gfx_cd_start(void)
{
int upd_len;
- dprintf("gfx_cd_start()");
+ // _rot_comp.XD_Mul = ((_rot_comp.Reg_5C & 0x1f) + 1) * 4; // unused
+ _rot_comp.Function = (_rot_comp.Reg_58 & 7) | (Pico_mcd->s68k_regs[3] & 0x18); // Jmp_Adr
+ // _rot_comp.Buffer_Adr = (_rot_comp.Reg_5E & 0xfff8) << 2; // unused?
+ _rot_comp.YD = (_rot_comp.Reg_60 >> 3) & 7;
+ _rot_comp.Vector_Adr = (_rot_comp.Reg_66 & 0xfffe) << 2;
- upd_len = (rot_comp.Reg_62 >> 3) & 0x3f;
+ upd_len = (_rot_comp.Reg_62 >> 3) & 0x3f;
upd_len = Table_Rot_Time[upd_len];
+ _rot_comp.Draw_Speed = _rot_comp.Float_Part = upd_len;
+
+ _rot_comp.Reg_58 |= 0x8000; // Stamp_Size, we start a new GFX operation
- rot_comp.Draw_Speed = rot_comp.Float_Part = upd_len;
+ switch (_rot_comp.Reg_58 & 6) // Scr_16?
+ {
+ case 0: // ?
+ _rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xff80) << 2;
+ break;
+ case 2: // .Dot_32
+ _rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xffe0) << 2;
+ break;
+ case 4: // .Scr_16
+ _rot_comp.Stamp_Map_Adr = 0x20000;
+ break;
+ case 6: // .Scr_16_Dot_32
+ _rot_comp.Stamp_Map_Adr = (_rot_comp.Reg_5A & 0xe000) << 2;
+ break;
+ }
- rot_comp.Reg_58 |= 0x8000; // Stamp_Size, we start a new GFX operation
+ dprintf("gfx_cd_start, stamp_map_addr=%06x", _rot_comp.Stamp_Map_Adr);
gfx_cd_update();
}
static void gfx_completed(void)
{
- rot_comp.Reg_58 &= 0x7fff; // Stamp_Size
- rot_comp.Reg_64 = 0;
+ _rot_comp.Reg_58 &= 0x7fff; // Stamp_Size
+ _rot_comp.Reg_64 = 0;
if (Pico_mcd->s68k_regs[0x33] & (1<<1))
{
dprintf("gfx_cd irq 1");
}
-//static void gfx_do(void)
-//{
-//}
+static void gfx_do(unsigned int func, unsigned short *stamp_base, unsigned int H_Dot)
+{
+ unsigned int eax, ebx, ecx, edx, esi, edi, pixel;
+ unsigned int XD, Buffer_Adr;
+ int DYXS;
+
+ XD = _rot_comp.Reg_60 & 7;
+ Buffer_Adr = ((_rot_comp.Reg_5E & 0xfff8) + _rot_comp.YD) << 2;
+ ecx = *(unsigned int *)(Pico_mcd->word_ram2M + _rot_comp.Vector_Adr);
+ edx = ecx >> 16;
+ ecx = (ecx & 0xffff) << 8;
+ edx <<= 8;
+ DYXS = *(int *)(Pico_mcd->word_ram2M + _rot_comp.Vector_Adr + 4);
+ _rot_comp.Vector_Adr += 8;
+
+ // MAKE_IMAGE_LINE
+ while (H_Dot)
+ {
+ // MAKE_IMAGE_PIXEL
+ if (!(func & 1)) // NOT TILED
+ {
+ int mask = (func & 4) ? 0x00800000 : 0x00f80000;
+ if ((ecx | edx) & mask)
+ {
+ if (func & 0x18) goto Next_Pixel;
+ pixel = 0;
+ goto Pixel_Out;
+ }
+ }
+
+ if (func & 2) // mode 32x32 dot
+ {
+ if (func & 4) // 16x16 screen
+ {
+ ebx = ((ecx >> (11+5)) & 0x007f) |
+ ((edx >> (11-2)) & 0x3f80);
+ }
+ else // 1x1 screen
+ {
+ ebx = ((ecx >> (11+5)) & 0x07) |
+ ((edx >> (11+2)) & 0x38);
+ }
+ }
+ else // mode 16x16 dot
+ {
+ if (func & 4) // 16x16 screen
+ {
+ ebx = ((ecx >> (11+4)) & 0x00ff) |
+ ((edx >> (11-4)) & 0xff00);
+ }
+ else // 1x1 screen
+ {
+ ebx = ((ecx >> (11+4)) & 0x0f) |
+ ((edx >> (11+0)) & 0xf0);
+ }
+ }
+
+ edi = stamp_base[ebx];
+ esi = (edi & 0x7ff) << 7;
+ if (!esi) { pixel = 0; goto Pixel_Out; }
+ edi >>= (11+1);
+ edi &= (0x1c>>1);
+ eax = ecx;
+ ebx = edx;
+ if (func & 2) edi |= 1; // 32 dots?
+ switch (edi)
+ {
+ case 0x00: // No_Flip_0, 16x16 dots
+ ebx = (ebx >> 9) & 0x3c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x1000; // bswap
+ eax = ((eax >> 8) & 0x40) + ebx;
+ break;
+ case 0x01: // No_Flip_0, 32x32 dots
+ ebx = (ebx >> 9) & 0x7c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x1000; // bswap
+ eax = ((eax >> 7) & 0x180) + ebx;
+ break;
+ case 0x02: // No_Flip_90, 16x16 dots
+ eax = (eax >> 9) & 0x3c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x2800; // bswap
+ eax += ((ebx >> 8) & 0x40) ^ 0x40;
+ break;
+ case 0x03: // No_Flip_90, 32x32 dots
+ eax = (eax >> 9) & 0x7c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x2800; // bswap
+ eax += ((ebx >> 7) & 0x180) ^ 0x180;
+ break;
+ case 0x04: // No_Flip_180, 16x16 dots
+ ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x2800; // bswap and flip
+ eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
+ break;
+ case 0x05: // No_Flip_180, 32x32 dots
+ ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x2800; // bswap and flip
+ eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
+ break;
+ case 0x06: // No_Flip_270, 16x16 dots
+ eax = ((eax >> 9) & 0x3c) ^ 0x3c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x1000; // bswap
+ eax += (ebx >> 8) & 0x40;
+ break;
+ case 0x07: // No_Flip_270, 32x32 dots
+ eax = ((eax >> 9) & 0x7c) ^ 0x7c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x1000; // bswap
+ eax += (ebx >> 7) & 0x180;
+ break;
+ case 0x08: // Flip_0, 16x16 dots
+ ebx = (ebx >> 9) & 0x3c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x2800; // bswap, flip
+ eax = (((eax >> 8) & 0x40) ^ 0x40) + ebx;
+ break;
+ case 0x09: // Flip_0, 32x32 dots
+ ebx = (ebx >> 9) & 0x7c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x2800; // bswap, flip
+ eax = (((eax >> 7) & 0x180) ^ 0x180) + ebx;
+ break;
+ case 0x0a: // Flip_90, 16x16 dots
+ eax = ((eax >> 9) & 0x3c) ^ 0x3c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x2800; // bswap, flip
+ eax += ((ebx >> 8) & 0x40) ^ 0x40;
+ break;
+ case 0x0b: // Flip_90, 32x32 dots
+ eax = ((eax >> 9) & 0x7c) ^ 0x7c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x2800; // bswap, flip
+ eax += ((ebx >> 7) & 0x180) ^ 0x180;
+ break;
+ case 0x0c: // Flip_180, 16x16 dots
+ ebx = ((ebx >> 9) & 0x3c) ^ 0x3c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x1000; // bswap
+ eax = ((eax >> 8) & 0x40) + ebx;
+ break;
+ case 0x0d: // Flip_180, 32x32 dots
+ ebx = ((ebx >> 9) & 0x7c) ^ 0x7c;
+ ebx += esi;
+ edi = (eax & 0x3800) ^ 0x1000; // bswap
+ eax = ((eax >> 7) & 0x180) + ebx;
+ break;
+ case 0x0e: // Flip_270, 16x16 dots
+ eax = (eax >> 9) & 0x3c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x1000; // bswap, flip
+ eax += (ebx >> 8) & 0x40;
+ break;
+ case 0x0f: // Flip_270, 32x32 dots
+ eax = (eax >> 9) & 0x7c;
+ eax += esi;
+ edi = (ebx & 0x3800) ^ 0x1000; // bswap, flip
+ eax += (ebx >> 7) & 0x180;
+ break;
+ }
+ pixel = *(Pico_mcd->word_ram2M + (edi >> 12) + eax);
+ if (!(edi & 0x800)) pixel >>= 4;
+ else pixel &= 0x0f;
-void gfx_cd_update(void)
+Pixel_Out:
+ if (!pixel && (func & 0x18)) goto Next_Pixel;
+ esi = Buffer_Adr + ((XD>>1)^1); // pixel addr
+ eax = *(Pico_mcd->word_ram2M + esi); // old pixel
+ if (XD & 1)
+ {
+ if ((eax & 0x0f) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
+ *(Pico_mcd->word_ram2M + esi) = pixel | (eax & 0xf0);
+ }
+ else
+ {
+ if ((eax & 0xf0) && (func & 0x18) == 0x08) goto Next_Pixel; // underwrite
+ *(Pico_mcd->word_ram2M + esi) = (pixel << 4) | (eax & 0xf);
+ }
+
+
+Next_Pixel:
+ ecx += (DYXS << 16) >> 16; // _rot_comp.DXS;
+ edx += DYXS >> 16; // _rot_comp.DYS;
+ XD++;
+ if (XD >= 8)
+ {
+ Buffer_Adr += ((_rot_comp.Reg_5C & 0x1f) + 1) << 5;
+ XD = 0;
+ }
+ H_Dot--;
+ }
+ // end while
+
+
+// nothing_to_draw:
+ _rot_comp.YD++;
+ // _rot_comp.V_Dot--; // will be done by caller
+}
+
+
+PICO_INTERNAL void gfx_cd_update(void)
{
- unsigned char *V_Dot = (unsigned char *) &rot_comp.Reg_64;
+ int V_Dot = _rot_comp.Reg_64 & 0xff;
int jobs;
- dprintf("gfx_cd_update, Reg_64 = %04x", rot_comp.Reg_64);
+ dprintf("gfx_cd_update, Reg_64 = %04x", _rot_comp.Reg_64);
- if (!*V_Dot)
+ if (!V_Dot)
{
- // ...
gfx_completed();
return;
}
- jobs = rot_comp.Float_Part >> 16;
+ jobs = _rot_comp.Float_Part >> 16;
if (!jobs)
{
- rot_comp.Float_Part += rot_comp.Draw_Speed;
+ _rot_comp.Float_Part += _rot_comp.Draw_Speed;
return;
}
- rot_comp.Float_Part &= 0xffff;
- rot_comp.Float_Part += rot_comp.Draw_Speed;
+ _rot_comp.Float_Part &= 0xffff;
+ _rot_comp.Float_Part += _rot_comp.Draw_Speed;
- while (jobs--)
+ if (PicoOpt & 0x1000) // scale/rot enabled
{
- // jmp [Jmp_Adr]:
- (*V_Dot)--; // dec byte [V_Dot]
+ unsigned int func = _rot_comp.Function;
+ unsigned int H_Dot = _rot_comp.Reg_62 & 0x1ff;
+ unsigned short *stamp_base = (unsigned short *) (Pico_mcd->word_ram2M + _rot_comp.Stamp_Map_Adr);
- if (!*V_Dot)
+ while (jobs--)
+ {
+ gfx_do(func, stamp_base, H_Dot); // jmp [Jmp_Adr]:
+
+ V_Dot--; // dec byte [V_Dot]
+ if (V_Dot == 0)
+ {
+ // GFX_Completed:
+ gfx_completed();
+ return;
+ }
+ }
+ }
+ else
+ {
+ if (jobs >= V_Dot)
{
- // GFX_Completed:
gfx_completed();
return;
}
+ V_Dot -= jobs;
}
+
+ _rot_comp.Reg_64 = V_Dot;
}
-unsigned int gfx_cd_read(unsigned int a)
+PICO_INTERNAL_ASM unsigned int gfx_cd_read(unsigned int a)
{
unsigned int d = 0;
switch (a) {
- case 0x58: d = rot_comp.Reg_58; break;
- case 0x5A: d = rot_comp.Reg_5A; break;
- case 0x5C: d = rot_comp.Reg_5C; break;
- case 0x5E: d = rot_comp.Reg_5E; break;
- case 0x60: d = rot_comp.Reg_60; break;
- case 0x62: d = rot_comp.Reg_62; break;
- case 0x64: d = rot_comp.Reg_64; break;
+ case 0x58: d = _rot_comp.Reg_58; break;
+ case 0x5A: d = _rot_comp.Reg_5A; break;
+ case 0x5C: d = _rot_comp.Reg_5C; break;
+ case 0x5E: d = _rot_comp.Reg_5E; break;
+ case 0x60: d = _rot_comp.Reg_60; break;
+ case 0x62: d = _rot_comp.Reg_62; break;
+ case 0x64: d = _rot_comp.Reg_64; break;
case 0x66: break;
- default: dprintf("gfx_cd_read: unexpected address: %02x", a); break;
+ default: dprintf("gfx_cd_read FIXME: unexpected address: %02x", a); break;
}
dprintf("gfx_cd_read(%02x) = %04x", a, d);
- return 0;
+ return d;
}
-void gfx_cd_write(unsigned int a, unsigned int d)
+PICO_INTERNAL_ASM void gfx_cd_write16(unsigned int a, unsigned int d)
{
- dprintf("gfx_cd_write(%x, %04x)", a, d);
+ dprintf("gfx_cd_write16(%x, %04x)", a, d);
switch (a) {
case 0x58: // .Reg_Stamp_Size
- rot_comp.Reg_58 = d & 7;
+ _rot_comp.Reg_58 = d & 7;
return;
case 0x5A: // .Reg_Stamp_Adr
- rot_comp.Reg_5A = d & 0xffe0;
+ _rot_comp.Reg_5A = d & 0xffe0;
return;
case 0x5C: // .Reg_IM_VCell_Size
- rot_comp.Reg_5C = d & 0x1f;
+ _rot_comp.Reg_5C = d & 0x1f;
return;
case 0x5E: // .Reg_IM_Adr
- rot_comp.Reg_5E = d & 0xFFF8;
+ _rot_comp.Reg_5E = d & 0xFFF8;
return;
case 0x60: // .Reg_IM_Offset
- rot_comp.Reg_60 = d & 0x3f;
+ _rot_comp.Reg_60 = d & 0x3f;
return;
case 0x62: // .Reg_IM_HDot_Size
- rot_comp.Reg_62 = d & 0x1ff;
+ _rot_comp.Reg_62 = d & 0x1ff;
return;
case 0x64: // .Reg_IM_VDot_Size
- rot_comp.Reg_64 = d & 0xff; // V_Dot, must be 32bit?
+ _rot_comp.Reg_64 = d & 0xff; // V_Dot, must be 32bit?
return;
case 0x66: // .Reg_Vector_Adr
- rot_comp.Reg_66 = d & 0xfffe;
+ _rot_comp.Reg_66 = d & 0xfffe;
if (Pico_mcd->s68k_regs[3]&4) return; // can't do tanformations in 1M mode
gfx_cd_start();
return;
- default: dprintf("gfx_cd_write: unexpected address: %02x", a); return;
+ default: dprintf("gfx_cd_write16 FIXME: unexpected address: %02x", a); return;
}
}
-void gfx_cd_reset(void)
+PICO_INTERNAL void gfx_cd_reset(void)
+{
+ memset(&_rot_comp.Reg_58, 0, sizeof(_rot_comp));
+}
+
+
+// --------------------------------
+
+#include "cell_map.c"
+
+#ifndef UTYPES_DEFINED
+typedef unsigned short u16;
+#endif
+
+// check: Heart of the alien, jaguar xj 220
+PICO_INTERNAL void DmaSlowCell(unsigned int source, unsigned int a, int len, unsigned char inc)
{
- memset(&rot_comp.Reg_58, 0, 0/*sizeof(Pico_mcd->rot_comp)*/);
+ unsigned char *base;
+ unsigned int asrc, a2;
+ u16 *r;
+
+ base = Pico_mcd->word_ram1M[Pico_mcd->s68k_regs[3]&1];
+
+ switch (Pico.video.type)
+ {
+ case 1: // vram
+ r = Pico.vram;
+ for(; len; len--)
+ {
+ asrc = cell_map(source >> 2) << 2;
+ asrc |= source & 2;
+ // if(a&1) d=(d<<8)|(d>>8); // ??
+ r[a>>1] = *(u16 *)(base + asrc);
+ source += 2;
+ // AutoIncrement
+ a=(u16)(a+inc);
+ }
+ rendstatus|=0x10;
+ break;
+
+ case 3: // cram
+ Pico.m.dirtyPal = 1;
+ r = Pico.cram;
+ for(a2=a&0x7f; len; len--)
+ {
+ asrc = cell_map(source >> 2) << 2;
+ asrc |= source & 2;
+ r[a2>>1] = *(u16 *)(base + asrc);
+ source += 2;
+ // AutoIncrement
+ a2+=inc;
+ // good dest?
+ if(a2 >= 0x80) break;
+ }
+ a=(a&0xff00)|a2;
+ break;
+
+ case 5: // vsram[a&0x003f]=d;
+ r = Pico.vsram;
+ for(a2=a&0x7f; len; len--)
+ {
+ asrc = cell_map(source >> 2) << 2;
+ asrc |= source & 2;
+ r[a2>>1] = *(u16 *)(base + asrc);
+ source += 2;
+ // AutoIncrement
+ a2+=inc;
+ // good dest?
+ if(a2 >= 0x80) break;
+ }
+ a=(a&0xff00)|a2;
+ break;
+ }
+ // remember addr
+ Pico.video.addr=(u16)a;
}
notaz.gp2x.de / picodrive.git / blobdiff