Update to libjpeg_turbo 1.4.90

simd/jquant-mmx.asm

+;
+; jquant.asm - sample data conversion and quantization (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 "jsimdext.inc"
+%include "jdct.inc"
+
+; --------------------------------------------------------------------------
+        SECTION SEG_TEXT
+        BITS    32
+;
+; Load data into workspace, applying unsigned->signed conversion
+;
+; GLOBAL(void)
+; jsimd_convsamp_mmx (JSAMPARRAY sample_data, JDIMENSION start_col,
+;                     DCTELEM *workspace);
+;
+
+%define sample_data     ebp+8           ; JSAMPARRAY sample_data
+%define start_col       ebp+12          ; JDIMENSION start_col
+%define workspace       ebp+16          ; DCTELEM *workspace
+
+        align   16
+        global  EXTN(jsimd_convsamp_mmx)
+
+EXTN(jsimd_convsamp_mmx):
+        push    ebp
+        mov     ebp,esp
+        push    ebx
+;       push    ecx             ; need not be preserved
+;       push    edx             ; need not be preserved
+        push    esi
+        push    edi
+
+        pxor    mm6,mm6                 ; mm6=(all 0's)
+        pcmpeqw mm7,mm7
+        psllw   mm7,7                   ; mm7={0xFF80 0xFF80 0xFF80 0xFF80}
+
+        mov     esi, JSAMPARRAY [sample_data]   ; (JSAMPROW *)
+        mov     eax, JDIMENSION [start_col]
+        mov     edi, POINTER [workspace]        ; (DCTELEM *)
+        mov     ecx, DCTSIZE/4
+        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]    ; mm0=(01234567)
+        movq    mm1, MMWORD [edx+eax*SIZEOF_JSAMPLE]    ; mm1=(89ABCDEF)
+
+        mov     ebx, JSAMPROW [esi+2*SIZEOF_JSAMPROW]   ; (JSAMPLE *)
+        mov     edx, JSAMPROW [esi+3*SIZEOF_JSAMPROW]   ; (JSAMPLE *)
+
+        movq    mm2, MMWORD [ebx+eax*SIZEOF_JSAMPLE]    ; mm2=(GHIJKLMN)
+        movq    mm3, MMWORD [edx+eax*SIZEOF_JSAMPLE]    ; mm3=(OPQRSTUV)
+
+        movq      mm4,mm0
+        punpcklbw mm0,mm6               ; mm0=(0123)
+        punpckhbw mm4,mm6               ; mm4=(4567)
+        movq      mm5,mm1
+        punpcklbw mm1,mm6               ; mm1=(89AB)
+        punpckhbw mm5,mm6               ; mm5=(CDEF)
+
+        paddw   mm0,mm7
+        paddw   mm4,mm7
+        paddw   mm1,mm7
+        paddw   mm5,mm7
+
+        movq    MMWORD [MMBLOCK(0,0,edi,SIZEOF_DCTELEM)], mm0
+        movq    MMWORD [MMBLOCK(0,1,edi,SIZEOF_DCTELEM)], mm4
+        movq    MMWORD [MMBLOCK(1,0,edi,SIZEOF_DCTELEM)], mm1
+        movq    MMWORD [MMBLOCK(1,1,edi,SIZEOF_DCTELEM)], mm5
+
+        movq      mm0,mm2
+        punpcklbw mm2,mm6               ; mm2=(GHIJ)
+        punpckhbw mm0,mm6               ; mm0=(KLMN)
+        movq      mm4,mm3
+        punpcklbw mm3,mm6               ; mm3=(OPQR)
+        punpckhbw mm4,mm6               ; mm4=(STUV)
+
+        paddw   mm2,mm7
+        paddw   mm0,mm7
+        paddw   mm3,mm7
+        paddw   mm4,mm7
+
+        movq    MMWORD [MMBLOCK(2,0,edi,SIZEOF_DCTELEM)], mm2
+        movq    MMWORD [MMBLOCK(2,1,edi,SIZEOF_DCTELEM)], mm0
+        movq    MMWORD [MMBLOCK(3,0,edi,SIZEOF_DCTELEM)], mm3
+        movq    MMWORD [MMBLOCK(3,1,edi,SIZEOF_DCTELEM)], mm4
+
+        add     esi, byte 4*SIZEOF_JSAMPROW
+        add     edi, byte 4*DCTSIZE*SIZEOF_DCTELEM
+        dec     ecx
+        jnz     short .convloop
+
+        emms            ; empty MMX 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
+;
+; This implementation is based on an algorithm described in
+;   "How to optimize for the Pentium family of microprocessors"
+;   (http://www.agner.org/assem/).
+;
+; GLOBAL(void)
+; jsimd_quantize_mmx (JCOEFPTR coef_block, DCTELEM *divisors,
+;                     DCTELEM *workspace);
+;
+
+%define RECIPROCAL(m,n,b) MMBLOCK(DCTSIZE*0+(m),(n),(b),SIZEOF_DCTELEM)
+%define CORRECTION(m,n,b) MMBLOCK(DCTSIZE*1+(m),(n),(b),SIZEOF_DCTELEM)
+%define SCALE(m,n,b)      MMBLOCK(DCTSIZE*2+(m),(n),(b),SIZEOF_DCTELEM)
+%define SHIFT(m,n,b)      MMBLOCK(DCTSIZE*3+(m),(n),(b),SIZEOF_DCTELEM)
+
+%define coef_block      ebp+8           ; JCOEFPTR coef_block
+%define divisors        ebp+12          ; DCTELEM *divisors
+%define workspace       ebp+16          ; DCTELEM *workspace
+
+        align   16
+        global  EXTN(jsimd_quantize_mmx)
+
+EXTN(jsimd_quantize_mmx):
+        push    ebp
+        mov     ebp,esp
+;       push    ebx             ; unused
+;       push    ecx             ; unused
+;       push    edx             ; need not be preserved
+        push    esi
+        push    edi
+
+        mov     esi, POINTER [workspace]
+        mov     edx, POINTER [divisors]
+        mov     edi, JCOEFPTR [coef_block]
+        mov     ah, 2
+        alignx  16,7
+.quantloop1:
+        mov     al, DCTSIZE2/8/2
+        alignx  16,7
+.quantloop2:
+        movq    mm2, MMWORD [MMBLOCK(0,0,esi,SIZEOF_DCTELEM)]
+        movq    mm3, MMWORD [MMBLOCK(0,1,esi,SIZEOF_DCTELEM)]
+
+        movq    mm0,mm2
+        movq    mm1,mm3
+
+        psraw   mm2,(WORD_BIT-1)  ; -1 if value < 0, 0 otherwise
+        psraw   mm3,(WORD_BIT-1)
+
+        pxor    mm0,mm2   ; val = -val
+        pxor    mm1,mm3
+        psubw   mm0,mm2
+        psubw   mm1,mm3
+
+        ;
+        ; MMX is an annoyingly crappy instruction set. It has two
+        ; misfeatures that are causing problems here:
+        ;
+        ; - All multiplications are signed.
+        ;
+        ; - The second operand for the shifts is not treated as packed.
+        ;
+        ;
+        ; We work around the first problem by implementing this algorithm:
+        ;
+        ; unsigned long unsigned_multiply(unsigned short x, unsigned short y)
+        ; {
+        ;   enum { SHORT_BIT = 16 };
+        ;   signed short sx = (signed short) x;
+        ;   signed short sy = (signed short) y;
+        ;   signed long sz;
+        ;
+        ;   sz = (long) sx * (long) sy;     /* signed multiply */
+        ;
+        ;   if (sx < 0) sz += (long) sy << SHORT_BIT;
+        ;   if (sy < 0) sz += (long) sx << SHORT_BIT;
+        ;
+        ;   return (unsigned long) sz;
+        ; }
+        ;
+        ; (note that a negative sx adds _sy_ and vice versa)
+        ;
+        ; For the second problem, we replace the shift by a multiplication.
+        ; Unfortunately that means we have to deal with the signed issue again.
+        ;
+
+        paddw   mm0, MMWORD [CORRECTION(0,0,edx)]   ; correction + roundfactor
+        paddw   mm1, MMWORD [CORRECTION(0,1,edx)]
+
+        movq    mm4,mm0   ; store current value for later
+        movq    mm5,mm1
+        pmulhw  mm0, MMWORD [RECIPROCAL(0,0,edx)]   ; reciprocal
+        pmulhw  mm1, MMWORD [RECIPROCAL(0,1,edx)]
+        paddw   mm0,mm4         ; reciprocal is always negative (MSB=1),
+        paddw   mm1,mm5   ; so we always need to add the initial value
+                        ; (input value is never negative as we
+                        ; inverted it at the start of this routine)
+
+        ; here it gets a bit tricky as both scale
+        ; and mm0/mm1 can be negative
+        movq    mm6, MMWORD [SCALE(0,0,edx)]    ; scale
+        movq    mm7, MMWORD [SCALE(0,1,edx)]
+        movq    mm4,mm0
+        movq    mm5,mm1
+        pmulhw  mm0,mm6
+        pmulhw  mm1,mm7
+
+        psraw   mm6,(WORD_BIT-1)    ; determine if scale is negative
+        psraw   mm7,(WORD_BIT-1)
+
+        pand    mm6,mm4             ; and add input if it is
+        pand    mm7,mm5
+        paddw   mm0,mm6
+        paddw   mm1,mm7
+
+        psraw   mm4,(WORD_BIT-1)    ; then check if negative input
+        psraw   mm5,(WORD_BIT-1)
+
+        pand    mm4, MMWORD [SCALE(0,0,edx)]    ; and add scale if it is
+        pand    mm5, MMWORD [SCALE(0,1,edx)]
+        paddw   mm0,mm4
+        paddw   mm1,mm5
+
+        pxor    mm0,mm2   ; val = -val
+        pxor    mm1,mm3
+        psubw   mm0,mm2
+        psubw   mm1,mm3
+
+        movq    MMWORD [MMBLOCK(0,0,edi,SIZEOF_DCTELEM)], mm0
+        movq    MMWORD [MMBLOCK(0,1,edi,SIZEOF_DCTELEM)], mm1
+
+        add     esi, byte 8*SIZEOF_DCTELEM
+        add     edx, byte 8*SIZEOF_DCTELEM
+        add     edi, byte 8*SIZEOF_JCOEF
+        dec     al
+        jnz     near .quantloop2
+        dec     ah
+        jnz     near .quantloop1        ; to avoid branch misprediction
+
+        emms            ; empty MMX state
+
+        pop     edi
+        pop     esi
+;       pop     edx             ; need not be preserved
+;       pop     ecx             ; unused
+;       pop     ebx             ; unused
+        pop     ebp
+        ret
+
+; For some reason, the OS X linker does not honor the request to align the
+; segment unless we do this.
+        align   16