@@ -3660,7 +3660,8 @@ float128 uint64_to_float128(uint64_t a, float_status *status)
| Arithmetic.
*----------------------------------------------------------------------------*/
-float64 float32_to_float64(float32 a, float_status *status)
+static float64 __attribute__((noinline))
+soft_float32_to_float64(float32 a, float_status *status)
{
flag aSign;
int aExp;
@@ -3685,6 +3686,20 @@ float64 float32_to_float64(float32 a, float_status *status)
}
+float64 float32_to_float64(float32 a, float_status *status)
+{
+ if (likely(float32_is_normal(a))) {
+ float f = *(float *)&a;
+ double r = f;
+
+ return *(float64 *)&r;
+ } else if (float32_is_zero(a)) {
+ return float64_set_sign(float64_zero, float32_is_neg(a));
+ } else {
+ return soft_float32_to_float64(a, status);
+ }
+}
+
/*----------------------------------------------------------------------------
| Returns the result of converting the single-precision floating-point value
| `a' to the extended double-precision floating-point format. The conversion
Performance improvement for SPEC06fp for the last few commits: qemu-aarch64 SPEC06fp (test set) speedup over QEMU 4c2c1015905 Host: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz error bars: 95% confidence interval 6 +-+---+-----+-----+-----+----+-----+-----+-----+-----+-----+-----+-----+-----+-----+----+-----+-----+-----+---+-+ 5 +-+..........................+++..............................................................................+-+ 4 +-+...........................@@=+..............................................................+addsub +-+ 3 +-+........+++++.+++++........@@=+............+++++...............+++........................+++++++++++ +-+ | +%@&+ |&& %%@&+ +%%@= +%%&=++%%&= +%%&= +++ +++++ ++++++%%@=++%%&= +%%&= ++++ | 2 +-+..+%@&++%%@&.+%%@&+$$%@=+#$%@=+#$%&=##$%&=*#$%&=.+%@&=...+==##%@&++%%@&+++++++$$%@=**$%@=*#$%&=*+f%&=##$@&=+-+ 1 +-+**#$@&**#%@&**#%@&**$%@=**$%@=**$%&=*#$%&=*#$%&**#$@&**#$@&**#%@&**#%@&**#%@=**$%@=**$%@=*#$%&=+sqr&=*#$@&=+-+ 0 +-+**#$@&**#%@&**#%@&**$%@=**$%@=**$%&=*#$%&=*#$%&**#$@&**#$@&**#%@&**#%@&**#%@=**$%@=**$%@=*#$%&=*+cm&=*#$@&=+-+ 416.game433.434.435.436.cac437.leslie444.447.de450.so453.454.ca459.GemsF465.ton470.lb48482.sph+f32f64ean qemu-aarch64 NBench score; higher is better Host: Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz 16 +-+-------------------+---------------------+----------------------+---------------------+-------------------+-+ 14 +-+..........................................+++++++***............+++..+++++................................+-+ 12 +-+.........................................@@@@&&===+*............@@@&&&==**..................+before +-+ 10 +-+.........................................@..@.&..=.*............@.@..&.=.*............@@@&&&==***ub +-+ 8 +-+.....................................++++@..@.&..=.*............@.@..&.=.*............@+@..&+= +*ul +-+ 6 +-+...................@@@@&&===**..++###$$$%%..@.&..=.*..***###$$++@.@..&.=.*.......$$$%%%.@..&+= +*iv +-+ 4 +-+............###$$$%%..@.&..=.*..***.#..$.%..@.&..=.*..*+*..#+$%%%.@..&.=.*..***###+$++%.@..&+= +*ma +-+ 2 +-+.........****.#..$.%..@.&..=.*..*.*.#..$.%..@.&..=.*..*.*..#.$..%.@..&.=.*..*.*..#.$..%.@..&+=+s*rt +-+ 0 +-+---------****##$$$%%@@@&&===**--***##$$$%%@@@&&===**--***###$$%%%@@&&&==**--***###$$%%%@@&&&==***mp-------+-+ FOURIER NEURAL NET LU DECOMPOSITION gmean +f32f64 Images in png: https://imgur.com/a/rkuZW Signed-off-by: Emilio G. Cota <cota@braap.org> --- fpu/softfloat.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-)