diff mbox series

[07/12] benchtests: Add coshf function to bench-math

Message ID 20211029171941.4161172-8-skpgkp2@gmail.com
State New
Headers show
Series benchtests: Add float version of math functions to bench-math | expand

Commit Message

Sunil Pandey Oct. 29, 2021, 5:19 p.m. UTC 
Add coshf function to bench-math and copy coshf-inputs to benchtests.
Motivation for this patch is to prepare for upcoming libmvec new
functions.  Float and double version of libmvec functions stays
together.

coshf-inputs file generated from cosh-inputs file using following
scaling formula:

f = d * (FLT_MAX/DBL_MAX)

Where d is input(double) and f is output(float).  If scaled float value
is duplicate in new input file, nextafterf() function used to find next
float value, ensuring no duplicates.
---
 benchtests/Makefile     |   1 +
 benchtests/coshf-inputs | 403 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 404 insertions(+)
 create mode 100644 benchtests/coshf-inputs

Comments

Paul Zimmermann Nov. 3, 2021, 4:43 p.m. UTC | #1 
Dear Sunil,

many entries (for example 0x1.631844p+9) yield a cosh value larger than 2^128
thus an overflow, and are not very representative of real applications.

Except maybe a few values such that cosh(x) is near 2^128, it would be better
to have cosh(x) < 2^128.

Paul
diff mbox series

Patch

diff --git a/benchtests/Makefile b/benchtests/Makefile
index 75bd3bff28..31c8adc942 100644
--- a/benchtests/Makefile
+++ b/benchtests/Makefile
@@ -41,6 +41,7 @@  bench-math := \
   cos \
   cosf \
   cosh \
+  coshf \
   erf \
   erfc \
   exp \
diff --git a/benchtests/coshf-inputs b/benchtests/coshf-inputs
new file mode 100644
index 0000000000..79fb9c4d7a
--- /dev/null
+++ b/benchtests/coshf-inputs
@@ -0,0 +1,403 @@ 
+## args: float
+## ret: float
+## includes: math.h
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