125     SMLAWB  r4, r4, r8, r9  // accu1 = accu1*val_tw.h - accu2*val_tw.l  in dct_IV_func1()
134     SMLAWB  r7, r6, r8, r7  // accu4 = accu4*val_tw.l+accu3*val_tw.h  in dct_IV_func1()
151     SMLAWB  r4, r4, r8, r9  // accu1 = accu1*val_tw.h - accu2*val_tw.l  in dct_IV_func1()
160     SMLAWB  r7, r6, r8, r7  // accu4 = accu4*val_tw.l+accu3*val_tw.h  in dct_IV_func1()
211     SMLAWB  accuX, accu1, val_tw, accuX  in dct_IV_func2()
222     SMLAWB  accu4, accu3, val_tw, accu4  in dct_IV_func2()
236     SMLAWB  accuX, accu1, val_tw, accuX  in dct_IV_func2()
247     SMLAWB  accu4, accu3, val_tw, accu4  in dct_IV_func2()
301     SMLAWB  r9, r4, r8, r9             // accuX = accu1*val_tw.h-(-accu2)*val_tw.l  in dst_IV_func1()
304     SMLAWB  r5, r5, r8, r4             // accu2 = (-accu2)*val_tw.t+accu1*val_tw.l  in dst_IV_func1()
324     SMLAWB  r9, r4, r8, r9             // accuX = accu1*val_tw.h-(-accu2)*val_tw.l  in dst_IV_func1()
327     SMLAWB  r5, r5, r8, r4             // accu2 = (-accu2)*val_tw.t+accu1*val_tw.l  in dst_IV_func1()
390     SMLAWB  accu1, accu1, val_tw, accu3       // accu1 = -accu1*val_tw.h-(-accu2)*val_tw.l  in dst_IV_func2()
391     SMLAWB  accu2, accu2, val_tw, accu4       // accu2 = (-accu1)*val_tw.l+(-accu2)*val_tw.h  in dst_IV_func2()
405     SMLAWB  accu4, accu4, val_tw, accu2       // accu4 = (-accu3)*val_tw.l+(-accu4)*val_tw.h  in dst_IV_func2()
422     SMLAWB  accu1, accu1, val_tw, accu3       // accu1 = -accu1*val_tw.h-(-accu2)*val_tw.l  in dst_IV_func2()
423     SMLAWB  accu2, accu2, val_tw, accu4       // accu2 = (-accu1)*val_tw.l+(-accu2)*val_tw.h  in dst_IV_func2()
437     SMLAWB  accu4, accu4, val_tw, accu2       // accu4 = (-accu3)*val_tw.l+(-accu4)*val_tw.h  in dst_IV_func2()