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clang-p2996/libc/src
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Tue Ly 484319f497 [libc] Make expm1f correctly rounded when the targets have no FMA instructions. 
Add another exceptional value and fix the case when |x| is small.

Performance tests with CORE-MATH project scripts:
With FMA instructions on Ryzen 1700:
```
$ ./perf.sh expm1f
LIBC-location: /home/lnt/experiment/llvm/llvm-project/build/projects/libc/lib/libllvmlibc.a
CORE-MATH reciprocal throughput   : 15.362
System LIBC reciprocal throughput : 53.194
LIBC reciprocal throughput        : 14.595
$ ./perf.sh expm1f --latency
LIBC-location: /home/lnt/experiment/llvm/llvm-project/build/projects/libc/lib/libllvmlibc.a
CORE-MATH latency   : 57.755
System LIBC latency : 147.020
LIBC latency        : 60.269
```
Without FMA instructions:
```
$ ./perf.sh expm1f
LIBC-location: /home/lnt/experiment/llvm/llvm-project/build/projects/libc/lib/libllvmlibc.a
CORE-MATH reciprocal throughput   : 15.362
System LIBC reciprocal throughput : 53.300
LIBC reciprocal throughput        : 18.020
$ ./perf.sh expm1f --latency
LIBC-location: /home/lnt/experiment/llvm/llvm-project/build/projects/libc/lib/libllvmlibc.a
CORE-MATH latency   : 57.758
System LIBC latency : 147.025
LIBC latency        : 70.304
```

Reviewed By: michaelrj

Differential Revision: https://reviews.llvm.org/D123440
2022-06-03 15:57:48 -04:00
..
__support
[libc] Automatically add -mfma flag for architectures supporting FMA.
2022-06-03 01:21:20 -04:00
assert
[libc][NFC] Remove all Linux specific code to respective linux/ directories
2022-02-08 18:32:18 +00:00
ctype
[libc][NFC] Add explicit casts to ctype functions
2021-08-23 18:17:20 +00:00
errno
[libc] Make the errno macro resolve to the thread local variable directly.
2022-03-04 17:29:49 +00:00
fcntl
[libc] Make the errno macro resolve to the thread local variable directly.
2022-03-04 17:29:49 +00:00
fenv
[libc] Remove the redundant header FPUtil/FEnvUtils.h
2022-03-04 14:09:47 -05:00
inttypes
[libc] apply new lint rules
2021-12-07 10:49:47 -08:00
math
[libc] Make expm1f correctly rounded when the targets have no FMA instructions.
2022-06-03 15:57:48 -04:00
pthread
[libc] Add pthread_create and pthread_join functions.
2022-06-02 01:47:24 +00:00
signal
[libc] Make the errno macro resolve to the thread local variable directly.
2022-03-04 17:29:49 +00:00
stdio
[libc] add fprintf and file_writer
2022-05-31 13:59:19 -07:00
stdlib
[libc][obvious] add aligned_alloc as entrypoint
2022-03-23 16:44:15 -07:00
string
[libc] Apply no-builtin everywhere, remove unnecessary flags
2022-06-01 13:34:36 +00:00
sys
[libc] Make the errno macro resolve to the thread local variable directly.
2022-03-04 17:29:49 +00:00
threads
[libc] Keep all thread state information separate from the thread structure.
2022-06-01 17:36:58 +00:00
time
[libc] Make the errno macro resolve to the thread local variable directly.
2022-03-04 17:29:49 +00:00
unistd
[libc] Add implementation of POSIX lseek function.
2022-03-15 16:24:48 +00:00
.clang-tidy
[libc] Add a .clang-tidy file for the toplevel libc directory.
2021-12-09 00:19:25 +00:00
CMakeLists.txt
[libc] Add pthread_mutexattr_t type and its setters and getters.
2022-04-04 18:11:12 +00:00