/* y multiplication */
        fmov.s @r0,fr0      /* 0 */
        fmov.s @(r0,r1),fr1 /* 1 */
        fmov.s @(r0,r2),fr2 /* 2 */
        fldi0 fr3
        fipr fv8,fv0

        fmov.s @(r0,r5),fr4 /* 1280 */
        fmov.s @(r0,r6),fr5 /* 1281 */
        fmov.s @(r0,r7),fr6 /* 1282 */
        fldi0 fr7
        fipr fv12,fv4

        fadd fr3,fr7
        fmul fr7,fr7

        /* save fr7 in FPUL */
        flds fr7,FPUL

        /* x multiplication */
        /* transpose and load
        before →
                fr0, fr1, fr2,   _,
                   ,    ,    ,    ,
                fr4, fr5, fr6,   _,

        after →
                fr0,    ,  fr4,  _,
                fr1,    ,  fr5,  _,
                fr2,    ,  fr6,  _,
        */
        /* exchange fr4/fr2 */
        fmov fr4,fr3
        fmov fr2,fr4
        fmov fr3,fr2
        /* load fr1,fr5 */
        fmov.s @(r0,r3),fr1 /* 640 */
        fldi0 fr3
        fipr fv8,fv0
        fmov.s @(r0,r4),fr5 /* 642 */
        fldi0 fr7
        fipr fv12,fv4

        fadd fr3,fr7
        fmul fr7,fr7
        /* restore FPUL from y multiplication */
        fsts FPUL,fr3
        fadd fr3,fr7

        fmov dr0,xd0 /* load 100.f constant */

        fcmp/gt fr0,fr7
        movt r9
        add #-1,r9

        add #4,r0 /* next pixel */