From a855d6202536ff28e5aae4f22a0f31d8f5b325d0 Mon Sep 17 00:00:00 2001 From: Franklin Wei Date: Sat, 21 Jan 2017 15:18:31 -0500 Subject: Port of Duke Nukem 3D This ports Fabien Sanglard's Chocolate Duke to run on a version of SDL for Rockbox. Change-Id: I8f2c4c78af19de10c1633ed7bb7a997b43256dd9 --- apps/plugins/sdl/src/hermes/x86p_16.asm | 490 ++++++++++++++++++++++++++++++++ 1 file changed, 490 insertions(+) create mode 100644 apps/plugins/sdl/src/hermes/x86p_16.asm (limited to 'apps/plugins/sdl/src/hermes/x86p_16.asm') diff --git a/apps/plugins/sdl/src/hermes/x86p_16.asm b/apps/plugins/sdl/src/hermes/x86p_16.asm new file mode 100644 index 0000000000..1801bcd153 --- /dev/null +++ b/apps/plugins/sdl/src/hermes/x86p_16.asm @@ -0,0 +1,490 @@ +; +; x86 format converters for HERMES +; Copyright (c) 1998 Glenn Fielder (gaffer@gaffer.org) +; This source code is licensed under the GNU LGPL +; +; Please refer to the file COPYING.LIB contained in the distribution for +; licensing conditions +; +; Routines adjusted for Hermes by Christian Nentwich (brn@eleet.mcb.at) +; Used with permission. +; + +BITS 32 + +%include "common.inc" + +SDL_FUNC _ConvertX86p16_16BGR565 +SDL_FUNC _ConvertX86p16_16RGB555 +SDL_FUNC _ConvertX86p16_16BGR555 +SDL_FUNC _ConvertX86p16_8RGB332 + +EXTERN _ConvertX86 + +SECTION .text + +_ConvertX86p16_16BGR565: + + ; check short + cmp ecx,BYTE 16 + ja .L3 + + +.L1: ; short loop + mov al,[esi] + mov ah,[esi+1] + mov ebx,eax + mov edx,eax + shr eax,11 + and eax,BYTE 11111b + and ebx,11111100000b + shl edx,11 + add eax,ebx + add eax,edx + mov [edi],al + mov [edi+1],ah + add esi,BYTE 2 + add edi,BYTE 2 + dec ecx + jnz .L1 +.L2: + retn + +.L3: ; head + mov eax,edi + and eax,BYTE 11b + jz .L4 + mov al,[esi] + mov ah,[esi+1] + mov ebx,eax + mov edx,eax + shr eax,11 + and eax,BYTE 11111b + and ebx,11111100000b + shl edx,11 + add eax,ebx + add eax,edx + mov [edi],al + mov [edi+1],ah + add esi,BYTE 2 + add edi,BYTE 2 + dec ecx + +.L4: ; save count + push ecx + + ; unroll twice + shr ecx,1 + + ; point arrays to end + lea esi,[esi+ecx*4] + lea edi,[edi+ecx*4] + + ; negative counter + neg ecx + jmp SHORT .L6 + +.L5: mov [edi+ecx*4-4],eax +.L6: mov eax,[esi+ecx*4] + + mov ebx,[esi+ecx*4] + and eax,07E007E0h + + mov edx,[esi+ecx*4] + and ebx,0F800F800h + + shr ebx,11 + and edx,001F001Fh + + shl edx,11 + add eax,ebx + + add eax,edx + inc ecx + + jnz .L5 + + mov [edi+ecx*4-4],eax + + ; tail + pop ecx + and ecx,BYTE 1 + jz .L7 + mov al,[esi] + mov ah,[esi+1] + mov ebx,eax + mov edx,eax + shr eax,11 + and eax,BYTE 11111b + and ebx,11111100000b + shl edx,11 + add eax,ebx + add eax,edx + mov [edi],al + mov [edi+1],ah + add esi,BYTE 2 + add edi,BYTE 2 + +.L7: + retn + + + + + + +_ConvertX86p16_16RGB555: + + ; check short + cmp ecx,BYTE 32 + ja .L3 + + +.L1: ; short loop + mov al,[esi] + mov ah,[esi+1] + mov ebx,eax + shr ebx,1 + and ebx, 0111111111100000b + and eax,BYTE 0000000000011111b + add eax,ebx + mov [edi],al + mov [edi+1],ah + add esi,BYTE 2 + add edi,BYTE 2 + dec ecx + jnz .L1 +.L2: + retn + +.L3: ; head + mov eax,edi + and eax,BYTE 11b + jz .L4 + mov al,[esi] + mov ah,[esi+1] + mov ebx,eax + shr ebx,1 + and ebx, 0111111111100000b + and eax,BYTE 0000000000011111b + add eax,ebx + mov [edi],al + mov [edi+1],ah + add esi,BYTE 2 + add edi,BYTE 2 + dec ecx + +.L4: ; save ebp + push ebp + + ; save count + push ecx + + ; unroll four times + shr ecx,2 + + ; point arrays to end + lea esi,[esi+ecx*8] + lea edi,[edi+ecx*8] + + ; negative counter + xor ebp,ebp + sub ebp,ecx + +.L5: mov eax,[esi+ebp*8] ; agi? + mov ecx,[esi+ebp*8+4] + + mov ebx,eax + mov edx,ecx + + and eax,0FFC0FFC0h + and ecx,0FFC0FFC0h + + shr eax,1 + and ebx,001F001Fh + + shr ecx,1 + and edx,001F001Fh + + add eax,ebx + add ecx,edx + + mov [edi+ebp*8],eax + mov [edi+ebp*8+4],ecx + + inc ebp + jnz .L5 + + ; tail + pop ecx +.L6: and ecx,BYTE 11b + jz .L7 + mov al,[esi] + mov ah,[esi+1] + mov ebx,eax + shr ebx,1 + and ebx, 0111111111100000b + and eax,BYTE 0000000000011111b + add eax,ebx + mov [edi],al + mov [edi+1],ah + add esi,BYTE 2 + add edi,BYTE 2 + dec ecx + jmp SHORT .L6 + +.L7: pop ebp + retn + + + + + + +_ConvertX86p16_16BGR555: + + ; check short + cmp ecx,BYTE 16 + ja .L3 + + +.L1: ; short loop + mov al,[esi] + mov ah,[esi+1] + mov ebx,eax + mov edx,eax + shr eax,11 + and eax,BYTE 11111b + shr ebx,1 + and ebx,1111100000b + shl edx,10 + and edx,0111110000000000b + add eax,ebx + add eax,edx + mov [edi],al + mov [edi+1],ah + add esi,BYTE 2 + add edi,BYTE 2 + dec ecx + jnz .L1 +.L2: + retn + +.L3: ; head + mov eax,edi + and eax,BYTE 11b + jz .L4 + mov al,[esi] + mov ah,[esi+1] + mov ebx,eax + mov edx,eax + shr eax,11 + and eax,BYTE 11111b + shr ebx,1 + and ebx,1111100000b + shl edx,10 + and edx,0111110000000000b + add eax,ebx + add eax,edx + mov [edi],al + mov [edi+1],ah + add esi,BYTE 2 + add edi,BYTE 2 + dec ecx + +.L4: ; save count + push ecx + + ; unroll twice + shr ecx,1 + + ; point arrays to end + lea esi,[esi+ecx*4] + lea edi,[edi+ecx*4] + + ; negative counter + neg ecx + jmp SHORT .L6 + +.L5: mov [edi+ecx*4-4],eax +.L6: mov eax,[esi+ecx*4] + + shr eax,1 + mov ebx,[esi+ecx*4] + + and eax,03E003E0h + mov edx,[esi+ecx*4] + + and ebx,0F800F800h + + shr ebx,11 + and edx,001F001Fh + + shl edx,10 + add eax,ebx + + add eax,edx + inc ecx + + jnz .L5 + + mov [edi+ecx*4-4],eax + + ; tail + pop ecx + and ecx,BYTE 1 + jz .L7 + mov al,[esi] + mov ah,[esi+1] + mov ebx,eax + mov edx,eax + shr eax,11 + and eax,BYTE 11111b + shr ebx,1 + and ebx,1111100000b + shl edx,10 + and edx,0111110000000000b + add eax,ebx + add eax,edx + mov [edi],al + mov [edi+1],ah + add esi,BYTE 2 + add edi,BYTE 2 + +.L7: + retn + + + + + + +_ConvertX86p16_8RGB332: + + ; check short + cmp ecx,BYTE 16 + ja .L3 + + +.L1: ; short loop + mov al,[esi+0] + mov ah,[esi+1] + mov ebx,eax + mov edx,eax + and eax,BYTE 11000b ; blue + shr eax,3 + and ebx,11100000000b ; green + shr ebx,6 + and edx,1110000000000000b ; red + shr edx,8 + add eax,ebx + add eax,edx + mov [edi],al + add esi,BYTE 2 + inc edi + dec ecx + jnz .L1 +.L2: + retn + +.L3: mov eax,edi + and eax,BYTE 11b + jz .L4 + mov al,[esi+0] + mov ah,[esi+1] + mov ebx,eax + mov edx,eax + and eax,BYTE 11000b ; blue + shr eax,3 + and ebx,11100000000b ; green + shr ebx,6 + and edx,1110000000000000b ; red + shr edx,8 + add eax,ebx + add eax,edx + mov [edi],al + add esi,BYTE 2 + inc edi + dec ecx + jmp SHORT .L3 + +.L4: ; save ebp + push ebp + + ; save count + push ecx + + ; unroll 4 times + shr ecx,2 + + ; prestep + mov dl,[esi+0] + mov bl,[esi+1] + mov dh,[esi+2] + +.L5: shl edx,16 + mov bh,[esi+3] + + shl ebx,16 + mov dl,[esi+4] + + mov dh,[esi+6] + mov bl,[esi+5] + + and edx,00011000000110000001100000011000b + mov bh,[esi+7] + + ror edx,16+3 + mov eax,ebx ; setup eax for reds + + and ebx,00000111000001110000011100000111b + and eax,11100000111000001110000011100000b ; reds + + ror ebx,16-2 + add esi,BYTE 8 + + ror eax,16 + add edi,BYTE 4 + + add eax,ebx + mov bl,[esi+1] ; greens + + add eax,edx + mov dl,[esi+0] ; blues + + mov [edi-4],eax + mov dh,[esi+2] + + dec ecx + jnz .L5 + + ; check tail + pop ecx + and ecx,BYTE 11b + jz .L7 + +.L6: ; tail + mov al,[esi+0] + mov ah,[esi+1] + mov ebx,eax + mov edx,eax + and eax,BYTE 11000b ; blue + shr eax,3 + and ebx,11100000000b ; green + shr ebx,6 + and edx,1110000000000000b ; red + shr edx,8 + add eax,ebx + add eax,edx + mov [edi],al + add esi,BYTE 2 + inc edi + dec ecx + jnz .L6 + +.L7: pop ebp + retn + +%ifidn __OUTPUT_FORMAT__,elf32 +section .note.GNU-stack noalloc noexec nowrite progbits +%endif -- cgit v1.2.3