Commit e3bc3a09 authored by Liu Yu's avatar Liu Yu Committed by Kumar Gala
Browse files

[POWERPC] Fix carry bug in 128-bit unsigned integer adding 



Synchronize it to the definition in include/math-emu/op-4.h for short term.

Signed-off-by: default avatarLiu Yu <Yu.Liu@freescale.com>
Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
parent e5091842

arch/powerpc/math-emu/op-4.h

+30 −10
Original line number Diff line number Diff line
@@ -195,18 +195,38 @@ 


#ifndef __FP_FRAC_ADD_4

#define __FP_FRAC_ADD_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0)	\

  (r0 = x0 + y0,							\

   r1 = x1 + y1 + (r0 < x0),						\

   r2 = x2 + y2 + (r1 < x1),						\

   r3 = x3 + y3 + (r2 < x2))

  do {								\

    int _c1, _c2, _c3;						\

    r0 = x0 + y0;						\

    _c1 = r0 < x0;						\

    r1 = x1 + y1;						\

    _c2 = r1 < x1;						\

    r1 += _c1;							\

    _c2 |= r1 < _c1;						\

    r2 = x2 + y2;						\

    _c3 = r2 < x2;						\

    r2 += _c2;							\

    _c3 |= r2 < _c2;						\

    r3 = x3 + y3 + _c3;						\

  } while (0)

#endif



#ifndef __FP_FRAC_SUB_4

#define __FP_FRAC_SUB_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0)	\

  (r0 = x0 - y0,                                                        \

   r1 = x1 - y1 - (r0 > x0),                                            \

   r2 = x2 - y2 - (r1 > x1),                                            \

   r3 = x3 - y3 - (r2 > x2))

  do {								\

    int _c1, _c2, _c3;						\

    r0 = x0 - y0;						\

    _c1 = r0 > x0;						\

    r1 = x1 - y1;						\

    _c2 = r1 > x1;						\

    r1 -= _c1;							\

    _c2 |= r1 > _c1;						\

    r2 = x2 - y2;						\

    _c3 = r2 > x2;						\

    r2 -= _c2;							\

    _c3 |= r2 > _c2;						\

    r3 = x3 - y3 - _c3;						\

  } while (0)

#endif



#ifndef __FP_FRAC_ADDI_4