diff --git a/common/jpeg/simd/jcqnt3dn.asm b/common/jpeg/simd/jcqnt3dn.asm
new file mode 100644
index 0000000..bc9b027
--- /dev/null
+++ b/common/jpeg/simd/jcqnt3dn.asm
@@ -0,0 +1,230 @@
+;
+; jcqnt3dn.asm - sample data conversion and quantization (3DNow! & MMX)
+;
+; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
+;
+; Based on
+; x86 SIMD extension for IJG JPEG library
+; Copyright (C) 1999-2006, MIYASAKA Masaru.
+; For conditions of distribution and use, see copyright notice in jsimdext.inc
+;
+; This file should be assembled with NASM (Netwide Assembler),
+; can *not* be assembled with Microsoft's MASM or any compatible
+; assembler (including Borland's Turbo Assembler).
+; NASM is available from http://nasm.sourceforge.net/ or
+; http://sourceforge.net/project/showfiles.php?group_id=6208
+;
+; [TAB8]
+
+%include "simd/jsimdext.inc"
+%include "simd/jdct.inc"
+
+; --------------------------------------------------------------------------
+	SECTION	SEG_TEXT
+	BITS	32
+;
+; Load data into workspace, applying unsigned->signed conversion
+;
+; GLOBAL(void)
+; jsimd_convsamp_float_3dnow (JSAMPARRAY sample_data, JDIMENSION start_col,
+;                             FAST_FLOAT * workspace);
+;
+
+%define sample_data	ebp+8		; JSAMPARRAY sample_data
+%define start_col	ebp+12		; JDIMENSION start_col
+%define workspace	ebp+16		; FAST_FLOAT * workspace
+
+	align	16
+	global	EXTN(jsimd_convsamp_float_3dnow)
+
+EXTN(jsimd_convsamp_float_3dnow):
+	push	ebp
+	mov	ebp,esp
+	push	ebx
+;	push	ecx		; need not be preserved
+;	push	edx		; need not be preserved
+	push	esi
+	push	edi
+
+	pcmpeqw  mm7,mm7
+	psllw    mm7,7
+	packsswb mm7,mm7		; mm7 = PB_CENTERJSAMPLE (0x808080..)
+
+	mov	esi, JSAMPARRAY [sample_data]	; (JSAMPROW *)
+	mov	eax, JDIMENSION [start_col]
+	mov	edi, POINTER [workspace]	; (DCTELEM *)
+	mov	ecx, DCTSIZE/2
+	alignx	16,7
+.convloop:
+	mov	ebx, JSAMPROW [esi+0*SIZEOF_JSAMPROW]	; (JSAMPLE *)
+	mov	edx, JSAMPROW [esi+1*SIZEOF_JSAMPROW]	; (JSAMPLE *)
+
+	movq	mm0, MMWORD [ebx+eax*SIZEOF_JSAMPLE]
+	movq	mm1, MMWORD [edx+eax*SIZEOF_JSAMPLE]
+
+	psubb	mm0,mm7				; mm0=(01234567)
+	psubb	mm1,mm7				; mm1=(89ABCDEF)
+
+	punpcklbw mm2,mm0			; mm2=(*0*1*2*3)
+	punpckhbw mm0,mm0			; mm0=(*4*5*6*7)
+	punpcklbw mm3,mm1			; mm3=(*8*9*A*B)
+	punpckhbw mm1,mm1			; mm1=(*C*D*E*F)
+
+	punpcklwd mm4,mm2			; mm4=(***0***1)
+	punpckhwd mm2,mm2			; mm2=(***2***3)
+	punpcklwd mm5,mm0			; mm5=(***4***5)
+	punpckhwd mm0,mm0			; mm0=(***6***7)
+
+	psrad	mm4,(DWORD_BIT-BYTE_BIT)	; mm4=(01)
+	psrad	mm2,(DWORD_BIT-BYTE_BIT)	; mm2=(23)
+	pi2fd	mm4,mm4
+	pi2fd	mm2,mm2
+	psrad	mm5,(DWORD_BIT-BYTE_BIT)	; mm5=(45)
+	psrad	mm0,(DWORD_BIT-BYTE_BIT)	; mm0=(67)
+	pi2fd	mm5,mm5
+	pi2fd	mm0,mm0
+
+	movq	MMWORD [MMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], mm4
+	movq	MMWORD [MMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], mm2
+	movq	MMWORD [MMBLOCK(0,2,edi,SIZEOF_FAST_FLOAT)], mm5
+	movq	MMWORD [MMBLOCK(0,3,edi,SIZEOF_FAST_FLOAT)], mm0
+
+	punpcklwd mm6,mm3			; mm6=(***8***9)
+	punpckhwd mm3,mm3			; mm3=(***A***B)
+	punpcklwd mm4,mm1			; mm4=(***C***D)
+	punpckhwd mm1,mm1			; mm1=(***E***F)
+
+	psrad	mm6,(DWORD_BIT-BYTE_BIT)	; mm6=(89)
+	psrad	mm3,(DWORD_BIT-BYTE_BIT)	; mm3=(AB)
+	pi2fd	mm6,mm6
+	pi2fd	mm3,mm3
+	psrad	mm4,(DWORD_BIT-BYTE_BIT)	; mm4=(CD)
+	psrad	mm1,(DWORD_BIT-BYTE_BIT)	; mm1=(EF)
+	pi2fd	mm4,mm4
+	pi2fd	mm1,mm1
+
+	movq	MMWORD [MMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], mm6
+	movq	MMWORD [MMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], mm3
+	movq	MMWORD [MMBLOCK(1,2,edi,SIZEOF_FAST_FLOAT)], mm4
+	movq	MMWORD [MMBLOCK(1,3,edi,SIZEOF_FAST_FLOAT)], mm1
+
+	add	esi, byte 2*SIZEOF_JSAMPROW
+	add	edi, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT
+	dec	ecx
+	jnz	near .convloop
+
+	femms		; empty MMX/3DNow! state
+
+	pop	edi
+	pop	esi
+;	pop	edx		; need not be preserved
+;	pop	ecx		; need not be preserved
+	pop	ebx
+	pop	ebp
+	ret
+
+
+; --------------------------------------------------------------------------
+;
+; Quantize/descale the coefficients, and store into coef_block
+;
+; GLOBAL(void)
+; jsimd_quantize_float_3dnow (JCOEFPTR coef_block, FAST_FLOAT * divisors,
+;                             FAST_FLOAT * workspace);
+;
+
+%define coef_block	ebp+8		; JCOEFPTR coef_block
+%define divisors	ebp+12		; FAST_FLOAT * divisors
+%define workspace	ebp+16		; FAST_FLOAT * workspace
+
+	align	16
+	global	EXTN(jsimd_quantize_float_3dnow)
+
+EXTN(jsimd_quantize_float_3dnow):
+	push	ebp
+	mov	ebp,esp
+;	push	ebx		; unused
+;	push	ecx		; unused
+;	push	edx		; need not be preserved
+	push	esi
+	push	edi
+
+	mov       eax, 0x4B400000	; (float)0x00C00000 (rndint_magic)
+	movd      mm7,eax
+	punpckldq mm7,mm7		; mm7={12582912.0F 12582912.0F}
+
+	mov	esi, POINTER [workspace]
+	mov	edx, POINTER [divisors]
+	mov	edi, JCOEFPTR [coef_block]
+	mov	eax, DCTSIZE2/16
+	alignx	16,7
+.quantloop:
+	movq	mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
+	movq	mm1, MMWORD [MMBLOCK(0,1,esi,SIZEOF_FAST_FLOAT)]
+	pfmul	mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)]
+	pfmul	mm1, MMWORD [MMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)]
+	movq	mm2, MMWORD [MMBLOCK(0,2,esi,SIZEOF_FAST_FLOAT)]
+	movq	mm3, MMWORD [MMBLOCK(0,3,esi,SIZEOF_FAST_FLOAT)]
+	pfmul	mm2, MMWORD [MMBLOCK(0,2,edx,SIZEOF_FAST_FLOAT)]
+	pfmul	mm3, MMWORD [MMBLOCK(0,3,edx,SIZEOF_FAST_FLOAT)]
+
+	pfadd	mm0,mm7			; mm0=(00 ** 01 **)
+	pfadd	mm1,mm7			; mm1=(02 ** 03 **)
+	pfadd	mm2,mm7			; mm0=(04 ** 05 **)
+	pfadd	mm3,mm7			; mm1=(06 ** 07 **)
+
+	movq      mm4,mm0
+	punpcklwd mm0,mm1		; mm0=(00 02 ** **)
+	punpckhwd mm4,mm1		; mm4=(01 03 ** **)
+	movq      mm5,mm2
+	punpcklwd mm2,mm3		; mm2=(04 06 ** **)
+	punpckhwd mm5,mm3		; mm5=(05 07 ** **)
+
+	punpcklwd mm0,mm4		; mm0=(00 01 02 03)
+	punpcklwd mm2,mm5		; mm2=(04 05 06 07)
+
+	movq	mm6, MMWORD [MMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
+	movq	mm1, MMWORD [MMBLOCK(1,1,esi,SIZEOF_FAST_FLOAT)]
+	pfmul	mm6, MMWORD [MMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)]
+	pfmul	mm1, MMWORD [MMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)]
+	movq	mm3, MMWORD [MMBLOCK(1,2,esi,SIZEOF_FAST_FLOAT)]
+	movq	mm4, MMWORD [MMBLOCK(1,3,esi,SIZEOF_FAST_FLOAT)]
+	pfmul	mm3, MMWORD [MMBLOCK(1,2,edx,SIZEOF_FAST_FLOAT)]
+	pfmul	mm4, MMWORD [MMBLOCK(1,3,edx,SIZEOF_FAST_FLOAT)]
+
+	pfadd	mm6,mm7			; mm0=(10 ** 11 **)
+	pfadd	mm1,mm7			; mm4=(12 ** 13 **)
+	pfadd	mm3,mm7			; mm0=(14 ** 15 **)
+	pfadd	mm4,mm7			; mm4=(16 ** 17 **)
+
+	movq      mm5,mm6
+	punpcklwd mm6,mm1		; mm6=(10 12 ** **)
+	punpckhwd mm5,mm1		; mm5=(11 13 ** **)
+	movq      mm1,mm3
+	punpcklwd mm3,mm4		; mm3=(14 16 ** **)
+	punpckhwd mm1,mm4		; mm1=(15 17 ** **)
+
+	punpcklwd mm6,mm5		; mm6=(10 11 12 13)
+	punpcklwd mm3,mm1		; mm3=(14 15 16 17)
+
+	movq	MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0
+	movq	MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm2
+	movq	MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm6
+	movq	MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm3
+
+	add	esi, byte 16*SIZEOF_FAST_FLOAT
+	add	edx, byte 16*SIZEOF_FAST_FLOAT
+	add	edi, byte 16*SIZEOF_JCOEF
+	dec	eax
+	jnz	near .quantloop
+
+	femms		; empty MMX/3DNow! state
+
+	pop	edi
+	pop	esi
+;	pop	edx		; need not be preserved
+;	pop	ecx		; unused
+;	pop	ebx		; unused
+	pop	ebp
+	ret
+