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| author | Liu Yu <Yu.Liu@freescale.com> | 2008-01-18 11:21:39 +0800 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2008-01-23 19:34:21 -0600 |
| commit | e3bc3a09bdfc1b3b88b32d7960c4c3b84a2b860f (patch) | |
| tree | 9072a7d785bb1aa3ef0714f0a9fc27ccd5ce1bca /arch/powerpc/math-emu | |
| parent | e5091842dc067c0c9ae0d8a26f9e2eecf7df34f3 (diff) | |
| download | lwn-e3bc3a09bdfc1b3b88b32d7960c4c3b84a2b860f.tar.gz lwn-e3bc3a09bdfc1b3b88b32d7960c4c3b84a2b860f.zip | |
[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: Liu Yu <Yu.Liu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/math-emu')
| -rw-r--r-- | arch/powerpc/math-emu/op-4.h | 40 |
1 files changed, 30 insertions, 10 deletions
diff --git a/arch/powerpc/math-emu/op-4.h b/arch/powerpc/math-emu/op-4.h index fcdd6d064c54..c9ae626070da 100644 --- a/arch/powerpc/math-emu/op-4.h +++ b/arch/powerpc/math-emu/op-4.h @@ -194,19 +194,39 @@ (X##_f[3] = I3, X##_f[2] = I2, X##_f[1] = I1, X##_f[0] = I0) #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)) +#define __FP_FRAC_ADD_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0) \ + 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)) +#define __FP_FRAC_SUB_4(r3,r2,r1,r0,x3,x2,x1,x0,y3,y2,y1,y0) \ + 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 |