diff options
Diffstat (limited to 'board/MAI/bios_emulator/scitech/src/pm/common/_int64.asm')
| -rw-r--r-- | board/MAI/bios_emulator/scitech/src/pm/common/_int64.asm | 309 |
1 files changed, 0 insertions, 309 deletions
diff --git a/board/MAI/bios_emulator/scitech/src/pm/common/_int64.asm b/board/MAI/bios_emulator/scitech/src/pm/common/_int64.asm deleted file mode 100644 index fdec1b58d8..0000000000 --- a/board/MAI/bios_emulator/scitech/src/pm/common/_int64.asm +++ /dev/null @@ -1,309 +0,0 @@ -;**************************************************************************** -;* -;* SciTech OS Portability Manager Library -;* -;* ======================================================================== -;* -;* The contents of this file are subject to the SciTech MGL Public -;* License Version 1.0 (the "License"); you may not use this file -;* except in compliance with the License. You may obtain a copy of -;* the License at http://www.scitechsoft.com/mgl-license.txt -;* -;* Software distributed under the License is distributed on an -;* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or -;* implied. See the License for the specific language governing -;* rights and limitations under the License. -;* -;* The Original Code is Copyright (C) 1991-1998 SciTech Software, Inc. -;* -;* The Initial Developer of the Original Code is SciTech Software, Inc. -;* All Rights Reserved. -;* -;* ======================================================================== -;* -;* Language: NASM or TASM Assembler -;* Environment: Intel 32 bit Protected Mode. -;* -;* Description: Code for 64-bit arhithmetic -;* -;**************************************************************************** - - IDEAL - -include "scitech.mac" - -header _int64 - -begcodeseg _int64 ; Start of code segment - -a_low EQU 04h ; Access a_low directly on stack -a_high EQU 08h ; Access a_high directly on stack -b_low EQU 0Ch ; Access b_low directly on stack -shift EQU 0Ch ; Access shift directly on stack -result_2 EQU 0Ch ; Access result directly on stack -b_high EQU 10h ; Access b_high directly on stack -result_3 EQU 10h ; Access result directly on stack -result_4 EQU 14h ; Access result directly on stack - -;---------------------------------------------------------------------------- -; void _PM_add64(u32 a_low,u32 a_high,u32 b_low,u32 b_high,__u64 *result); -;---------------------------------------------------------------------------- -; Adds two 64-bit numbers. -;---------------------------------------------------------------------------- -cprocstart _PM_add64 - - mov eax,[esp+a_low] - add eax,[esp+b_low] - mov edx,[esp+a_high] - adc edx,[esp+b_high] - mov ecx,[esp+result_4] - mov [ecx],eax - mov [ecx+4],edx - ret - -cprocend - -;---------------------------------------------------------------------------- -; void _PM_sub64(u32 a_low,u32 a_high,u32 b_low,u32 b_high,__u64 *result); -;---------------------------------------------------------------------------- -; Subtracts two 64-bit numbers. -;---------------------------------------------------------------------------- -cprocstart _PM_sub64 - - mov eax,[esp+a_low] - sub eax,[esp+b_low] - mov edx,[esp+a_high] - sbb edx,[esp+b_high] - mov ecx,[esp+result_4] - mov [ecx],eax - mov [ecx+4],edx - ret - -cprocend - -;---------------------------------------------------------------------------- -; void _PM_mul64(u32 a_high,u32 a_low,u32 b_high,u32 b_low,__u64 *result); -;---------------------------------------------------------------------------- -; Multiples two 64-bit numbers. -;---------------------------------------------------------------------------- -cprocstart _PM_mul64 - - mov eax,[esp+a_high] - mov ecx,[esp+b_high] - or ecx,eax - mov ecx,[esp+b_low] - jnz @@FullMultiply - mov eax,[esp+a_low] ; EDX:EAX = b.low * a.low - mul ecx - mov ecx,[esp+result_4] - mov [ecx],eax - mov [ecx+4],edx - ret - -@@FullMultiply: - push ebx - mul ecx ; EDX:EAX = a.high * b.low - mov ebx,eax - mov eax,[esp+a_low+4] - mul [DWORD esp+b_high+4] ; EDX:EAX = b.high * a.low - add ebx,eax - mov eax,[esp+a_low+4] - mul ecx ; EDX:EAX = a.low * b.low - add edx,ebx - pop ebx - mov ecx,[esp+result_4] - mov [ecx],eax - mov [ecx+4],edx - ret - -cprocend - -;---------------------------------------------------------------------------- -; void _PM_div64(u32 a_low,u32 a_high,u32 b_low,u32 b_high,__u64 *result); -;---------------------------------------------------------------------------- -; Divides two 64-bit numbers. -;---------------------------------------------------------------------------- -cprocstart _PM_div64 - - push edi - push esi - push ebx - xor edi,edi - mov eax,[esp+a_high+0Ch] - or eax,eax - jns @@ANotNeg - -; Dividend is negative, so negate it and save result for later - - inc edi - mov edx,[esp+a_low+0Ch] - neg eax - neg edx - sbb eax,0 - mov [esp+a_high+0Ch],eax - mov [esp+a_low+0Ch],edx - -@@ANotNeg: - mov eax,[esp+b_high+0Ch] - or eax,eax - jns @@BNotNeg - -; Divisor is negative, so negate it and save result for later - - inc edi - mov edx,[esp+b_low+0Ch] - neg eax - neg edx - sbb eax,0 - mov [esp+b_high+0Ch],eax - mov [esp+b_low+0Ch],edx - -@@BNotNeg: - or eax,eax - jnz @@BHighNotZero - -; b.high is zero, so handle this faster - - mov ecx,[esp+b_low+0Ch] - mov eax,[esp+a_high+0Ch] - xor edx,edx - div ecx - mov ebx,eax - mov eax,[esp+a_low+0Ch] - div ecx - mov edx,ebx - jmp @@BHighZero - -@@BHighNotZero: - mov ebx,eax - mov ecx,[esp+b_low+0Ch] - mov edx,[esp+a_high+0Ch] - mov eax,[esp+a_low+0Ch] - -; Shift values right until b.high becomes zero - -@@ShiftLoop: - shr ebx,1 - rcr ecx,1 - shr edx,1 - rcr eax,1 - or ebx,ebx - jnz @@ShiftLoop - -; Now complete the divide process - - div ecx - mov esi,eax - mul [DWORD esp+b_high+0Ch] - mov ecx,eax - mov eax,[esp+b_low+0Ch] - mul esi - add edx,ecx - jb @@8 - cmp edx,[esp+a_high+0Ch] - ja @@8 - jb @@9 - cmp eax,[esp+a_low+0Ch] - jbe @@9 -@@8: dec esi -@@9: xor edx,edx - mov eax,esi - -@@BHighZero: - dec edi - jnz @@Done - -; The result needs to be negated as either a or b was negative - - neg edx - neg eax - sbb edx,0 - -@@Done: pop ebx - pop esi - pop edi - mov ecx,[esp+result_4] - mov [ecx],eax - mov [ecx+4],edx - ret - -cprocend - -;---------------------------------------------------------------------------- -; __i64 _PM_shr64(u32 a_low,s32 a_high,s32 shift,__u64 *result); -;---------------------------------------------------------------------------- -; Shift a 64-bit number right -;---------------------------------------------------------------------------- -cprocstart _PM_shr64 - - mov eax,[esp+a_low] - mov edx,[esp+a_high] - mov cl,[esp+shift] - shrd edx,eax,cl - mov ecx,[esp+result_3] - mov [ecx],eax - mov [ecx+4],edx - ret - -cprocend - -;---------------------------------------------------------------------------- -; __i64 _PM_sar64(u32 a_low,s32 a_high,s32 shift,__u64 *result); -;---------------------------------------------------------------------------- -; Shift a 64-bit number right (signed) -;---------------------------------------------------------------------------- -cprocstart _PM_sar64 - - mov eax,[esp+a_low] - mov edx,[esp+a_high] - mov cl,[esp+shift] - sar edx,cl - rcr eax,cl - mov ecx,[esp+result_3] - mov [ecx],eax - mov [ecx+4],edx - ret - -cprocend - -;---------------------------------------------------------------------------- -; __i64 _PM_shl64(u32 a_low,s32 a_high,s32 shift,__u64 *result); -;---------------------------------------------------------------------------- -; Shift a 64-bit number left -;---------------------------------------------------------------------------- -cprocstart _PM_shl64 - - mov eax,[esp+a_low] - mov edx,[esp+a_high] - mov cl,[esp+shift] - shld edx,eax,cl - mov ecx,[esp+result_3] - mov [ecx],eax - mov [ecx+4],edx - ret - -cprocend - -;---------------------------------------------------------------------------- -; __i64 _PM_neg64(u32 a_low,s32 a_high,__u64 *result); -;---------------------------------------------------------------------------- -; Shift a 64-bit number left -;---------------------------------------------------------------------------- -cprocstart _PM_neg64 - - mov eax,[esp+a_low] - mov edx,[esp+a_high] - neg eax - neg edx - sbb eax,0 - mov ecx,[esp+result_2] - mov [ecx],eax - mov [ecx+4],edx - ret - -cprocend - - -endcodeseg _int64 - - END |
