Assembly x64 Intro - Register Macro Define from OpenH264

%ifdef WIN64 ; Windows x64 ;************************************

DEFAULT REL

BITS 64

%define arg1 rcx
%define arg2 rdx
%define arg3 r8
%define arg4 r9
%define arg5 [rsp + push_num*8 + 40]
%define arg6 [rsp + push_num*8 + 48]
%define arg7 [rsp + push_num*8 + 56]
%define arg8 [rsp + push_num*8 + 64]
%define arg9 [rsp + push_num*8 + 72]
%define arg10 [rsp + push_num*8 + 80]
%define arg11 [rsp + push_num*8 + 88]
%define arg12 [rsp + push_num*8 + 96]

%define r0 rcx
%define r1 rdx
%define r2 r8
%define r3 r9
%define r4 rax
%define r5 r10
%define r6 r11
%define r7 rsp

%define r0d ecx
%define r1d edx
%define r2d r8d
%define r3d r9d
%define r4d eax
%define r5d r10d
%define r6d r11d

%define r0w  cx
%define r1w  dx
%define r2w  r8w
%define r3w  r9w
%define r6w  r11w

%define r0b  cl
%define r1b  dl
%define r2b  r8l
%define r3b  r9l

%define  PUSHRFLAGS     pushfq
%define  POPRFLAGS      popfq
%define  retrq          rax
%define  retrd          eax

%elifdef UNIX64 ; Unix x64 ;************************************

DEFAULT REL

BITS 64

%ifidn __OUTPUT_FORMAT__,elf64
SECTION .note.GNU-stack noalloc noexec nowrite progbits ; Mark the stack as non-executable
%endif

%define arg1 rdi
%define arg2 rsi
%define arg3 rdx
%define arg4 rcx
%define arg5 r8
%define arg6 r9
%define arg7 [rsp + push_num*8 + 8]
%define arg8 [rsp + push_num*8 + 16]
%define arg9 [rsp + push_num*8 + 24]
%define arg10 [rsp + push_num*8 + 32]
%define arg11 [rsp + push_num*8 + 40]
%define arg12 [rsp + push_num*8 + 48]

%define r0 rdi
%define r1 rsi
%define r2 rdx
%define r3 rcx
%define r4 r8
%define r5 r9
%define r6 r10
%define r7 rsp

%define r0d edi
%define r1d esi
%define r2d edx
%define r3d ecx
%define r4d r8d
%define r5d r9d
%define r6d r10d

%define r0w  di
%define r1w  si
%define r2w  dx
%define r3w  cx
%define r6w  r10w

%define r0b  dil
%define r1b  sil
%define r2b  dl
%define r3b  cl

%define  PUSHRFLAGS     pushfq
%define  POPRFLAGS      popfq
%define  retrq          rax
%define  retrd          eax

%elifdef X86_32 ; X86_32 ;************************************

BITS 32

%ifidn __OUTPUT_FORMAT__,elf
SECTION .note.GNU-stack noalloc noexec nowrite progbits ; Mark the stack as non-executable
%endif

%define arg1 [esp + push_num*4 + 4]
%define arg2 [esp + push_num*4 + 8]
%define arg3 [esp + push_num*4 + 12]
%define arg4 [esp + push_num*4 + 16]
%define arg5 [esp + push_num*4 + 20]
%define arg6 [esp + push_num*4 + 24]
%define arg7 [esp + push_num*4 + 28]
%define arg8 [esp + push_num*4 + 32]
%define arg9 [esp + push_num*4 + 36]
%define arg10 [esp + push_num*4 + 40]
%define arg11 [esp + push_num*4 + 44]
%define arg12 [esp + push_num*4 + 48]

%define r0 eax
%define r1 ecx
%define r2 edx
%define r3 ebx
%define r4 esi
%define r5 edi
%define r6 ebp
%define r7 esp

%define r0d eax
%define r1d ecx
%define r2d edx
%define r3d ebx
%define r4d esi
%define r5d edi
%define r6d ebp

%define r0w ax
%define r1w cx
%define r2w dx
%define r3w bx
%define r6w bp

%define r0b al
%define r1b cl
%define r2b dl
%define r3b bl

%define  PUSHRFLAGS     pushfd
%define  POPRFLAGS      popfd
%define  retrq          eax      ; 32 bit mode do not support 64 bits regesters
%define  retrd          eax

%endif