;

; 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

GLOBAL _ConvertX86

GLOBAL _x86return

GLOBAL _Hermes_X86_CPU

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]

	jmp [ebp+32]

_x86return:	

	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		

;; Hermes_X86_CPU returns the CPUID flags in eax

_Hermes_X86_CPU:

	pushfd

	pop eax

	mov ecx,eax

	xor eax,040000h

	push eax

	popfd

	pushfd

	pop eax

	xor eax,ecx

	jz .L1			; Processor is 386

	push ecx

	popfd

	mov eax,ecx

	xor eax,200000h

	push eax

	popfd

	pushfd

	pop eax

	xor eax,ecx

	je .L1

	push ebx

	mov eax,1

	cpuid

	mov eax,edx

	pop ebx

.L1:	

	ret

%ifidn __OUTPUT_FORMAT__,elf

section .note.GNU-stack noalloc noexec nowrite progbits

%endif