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>
diff --git a/arch/mips/math-emu/sp_fdp.c b/arch/mips/math-emu/sp_fdp.c
index 1526370..3797148 100644
--- a/arch/mips/math-emu/sp_fdp.c
+++ b/arch/mips/math-emu/sp_fdp.c
@@ -30,10 +30,11 @@
union ieee754sp ieee754sp_fdp(union ieee754dp x)
{
+ union ieee754sp y;
u32 rm;
COMPXDP;
- union ieee754sp nan;
+ COMPYSP;
EXPLODEXDP;
@@ -46,10 +47,11 @@
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);