diff options
| author | Liu Yu <yu.liu@freescale.com> | 2008-10-28 11:50:19 +0800 |
|---|---|---|
| committer | Kumar Gala <galak@kernel.crashing.org> | 2008-12-03 08:19:14 -0600 |
| commit | 463a8c01e153c06480b862d83d6a71bf5666a577 (patch) | |
| tree | fc513932bd4b14bbf2e5e5ec9d14848a316ffe5d | |
| parent | cf03033658739accd24f18f864107151a2e9a796 (diff) | |
powerpc/math-emu: Adopt new version of _FP_CHOOSENAN
Move to using the same macro definition for _FP_CHOOSENAN as s390,
sh, sparc32/64. The original author didn't understand this and
matched what sparc64 was doing and they have updated to this definition.
Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| -rw-r--r-- | arch/powerpc/include/asm/sfp-machine.h | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/arch/powerpc/include/asm/sfp-machine.h b/arch/powerpc/include/asm/sfp-machine.h index da12ea79cb9..88af036b1fe 100644 --- a/arch/powerpc/include/asm/sfp-machine.h +++ b/arch/powerpc/include/asm/sfp-machine.h @@ -111,16 +111,24 @@ #define FP_EX_DIVZERO (1 << (31 - 5)) #define FP_EX_INEXACT (1 << (31 - 6)) -/* This macro appears to be called when both X and Y are NaNs, and - * has to choose one and copy it to R. i386 goes for the larger of the - * two, sparc64 just picks Y. I don't understand this at all so I'll - * go with sparc64 because it's shorter :-> -- PMM +/* + * If one NaN is signaling and the other is not, + * we choose that one, otherwise we choose X. */ -#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ - do { \ - R##_s = Y##_s; \ - _FP_FRAC_COPY_##wc(R,Y); \ - R##_c = FP_CLS_NAN; \ +#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \ + do { \ + if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs) \ + && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)) \ + { \ + R##_s = X##_s; \ + _FP_FRAC_COPY_##wc(R,X); \ + } \ + else \ + { \ + R##_s = Y##_s; \ + _FP_FRAC_COPY_##wc(R,Y); \ + } \ + R##_c = FP_CLS_NAN; \ } while (0) |