diff options
| author |   Maciej W. Rozycki <macro@linux-mips.org> | 2015-04-03 23:25:52 +0100 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2015-04-08 01:09:44 +0200 |
| commit | b0c2f8fbdb52b95b969c96994bcab7c084530199 (patch) | |
| tree | a16085a94a2d5693893a3133147111910a7ae7ae /arch/mips/math-emu | |
| parent | MIPS: math-emu: Remove dead comparison helpers (diff) | |
| download | linux-dev-b0c2f8fbdb52b95b969c96994bcab7c084530199.tar.xz linux-dev-b0c2f8fbdb52b95b969c96994bcab7c084530199.zip | |
MIPS: math-emu: Optimise qNaN handling in `ieee754sp_fdp'
Rewrite qNaN handling in `ieee754sp_fdp' using the `ieee754_class_nan'
helper recently added, removing the external call to `ieee754sp_isnan'
and reducing the size of code by 16 instructions or 64 bytes.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9692/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/math-emu')
| -rw-r--r-- | arch/mips/math-emu/sp_fdp.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/arch/mips/math-emu/sp_fdp.c b/arch/mips/math-emu/sp_fdp.c index 152637093854..3797148893ad 100644 --- a/arch/mips/math-emu/sp_fdp.c +++ b/arch/mips/math-emu/sp_fdp.c @@ -30,10 +30,11 @@ static inline union ieee754sp ieee754sp_nan_fdp(int xs, u64 xm) union ieee754sp ieee754sp_fdp(union ieee754dp x) { + union ieee754sp y; u32 rm; COMPXDP; - union ieee754sp nan; + COMPYSP; EXPLODEXDP; @@ -46,10 +47,11 @@ union ieee754sp ieee754sp_fdp(union ieee754dp x) return ieee754sp_nanxcpt(ieee754sp_nan_fdp(xs, xm)); case IEEE754_CLASS_QNAN: - nan = ieee754sp_nan_fdp(xs, xm); - if (!ieee754sp_isnan(nan)) - nan = ieee754sp_indef(); - return nan; + y = ieee754sp_nan_fdp(xs, xm); + EXPLODEYSP; + if (!ieee754_class_nan(yc)) + y = ieee754sp_indef(); + return y; case IEEE754_CLASS_INF: return ieee754sp_inf(xs); |