Port of Duke Nukem 3D

This ports Fabien Sanglard's Chocolate Duke to run on a version of SDL
for Rockbox.

Change-Id: I8f2c4c78af19de10c1633ed7bb7a997b43256dd9

1 files changed, 75 insertions, 0 deletions

diff --git a/apps/plugins/sdl/src/hermes/x86_main.asm b/apps/plugins/sdl/src/hermes/x86_main.asm
new file mode 100644
index 0000000000..f7dd3db70c
--- /dev/null
+++ b/apps/plugins/sdl/src/hermes/x86_main.asm
@@ -0,0 +1,75 @@
+;
+; x86 format converters for HERMES
+; Some routines Copyright (c) 1998 Christian Nentwich (brn@eleet.mcb.at)
+; This source code is licensed under the GNU LGPL
+; 
+; Please refer to the file COPYING.LIB contained in the distribution for
+; licensing conditions          
+;
+; Most routines are (c) Glenn Fiedler (ptc@gaffer.org), used with permission
+; 
+
+BITS 32
+
+%include "common.inc"
+
+SDL_FUNC _ConvertX86
+
+SECTION .text
+                
+;; _ConvertX86:  
+;; [ESP+8] ConverterInfo*
+;; --------------------------------------------------------------------------
+;; ConverterInfo (ebp+..)
+;;   0: void *s_pixels
+;;   4: int s_width
+;;   8: int s_height
+;;  12: int s_add
+;;  16: void *d_pixels
+;;  20: int d_width
+;;  24: int d_height
+;;  28: int d_add
+;;  32: void (*converter_function)() 
+;;  36: int32 *lookup
+        
+_ConvertX86:
+        push ebp
+        mov ebp,esp
+
+; Save the registers used by the blitters, necessary for optimized code
+        pusha
+
+        mov eax,[ebp+8]
+
+        cmp dword [eax+4],BYTE 0
+        je endconvert
+        
+        mov ebp,eax
+        
+        mov esi,[ebp+0]
+        mov edi,[ebp+16]
+        
+y_loop: 
+        mov ecx,[ebp+4]
+
+        call [ebp+32]
+
+        add esi,[ebp+12]
+        add edi,[ebp+28]
+        
+        dec dword  [ebp+8]
+        jnz y_loop
+
+; Restore the registers used by the blitters, necessary for optimized code
+        popa
+        
+        pop ebp
+
+endconvert:     
+        ret             
+
+
+
+%ifidn __OUTPUT_FORMAT__,elf32
+section .note.GNU-stack noalloc noexec nowrite progbits
+%endif