Add the fenv implementation and build glue, and mark the known
long-double test failures as expected on loongarch.
Signed-off-by: Xiaoqiang Zhao <zhaoxiaoqiang007@gmail.com>
Signed-off-by: yu shan wei <mpysw@vip.163.com>
Details
Details
- Reviewers
jkoshy kib imp shipujin.t_gmail.com
Diff Detail
Diff Detail
- Repository
- rG FreeBSD src repository
- Lint
Lint Skipped - Unit
Tests Skipped - Build Status
Buildable 78879 Build 75762: arc lint + arc unit
Event Timeline
| lib/msun/loongarch/fenv.h | ||
|---|---|---|
| 199 | fadd.d $f0,$f0,$f assumes $f0+$f0 is exact, but LoongArch ELF ABI Table 2 ($fa0, "Preserved across calls: No") leaves $f0 an unspecified caller residue — verified: stale DBL_MAX makes feraise(FE_INEXACT) set OVERFLOW (0x50000), worst case spurious SIGFPE and Cause overwritten (Vol 1 Table 3-3). Trigger idea is right per §3.2.4.5; zero scratch first (change,verified). Suggested change to: __asm __volatile("movgr2fr.d $f0, $zero\n\tfadd.d $f0,$f0,$f0" : : : "$f0");https://loongson.github.io/LoongArch-Documentation/LoongArch-ELF-ABI-EN.html#_register_convention | |
Comment Actions
update
- rebase main
- fix copyright lines
- code refinement suggested by @shipujin.t_gmail.com