hanchenye-llvm-project/compiler-rt/test/builtins
Pirama Arumuga Nainar 4a39e80809 Fix incorrect truncation at the overflow boundary
Summary:
This patch fixes incorrect truncation when the input wider value is
exactly 2^dstBits.  For that value, the overflow to infinity is not
correctly handled.  The fix is to replace a strict '>' with '>='.

Currently,
__truncdfsf2(340282366900000000000000000000000000000.0) returns infinity
__truncdfsf2(340282366920938463463374607431768211456.0) returns 0
__truncdfsf2(400000000000000000000000000000000000000.0) returns infinity

Likewise, __truncdfhf2 and __truncsfhf2 (and consequently gnu_f2h_ieee)
are discontinuous at 65536.0.

This patch adds tests for all three cases, along with adding a missing
header include to fp_test.h.

Reviewers: joerg, ab, srhines

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D10594

llvm-svn: 240450
2015-06-23 20:24:53 +00:00
..
Unit Fix incorrect truncation at the overflow boundary 2015-06-23 20:24:53 +00:00
timing