On Fri, 27 Jan 2023 06:52:31 GMT, Joe Darcy <da...@openjdk.org> wrote:
> Restarting the port of FDLIBM to Java with the log10 method. > > There are two port, the first a near-transliteration from C port to use as a > test reference in > > test/jdk/java/lang/StrictMath/FdlibmTranslit.java > > and a more idiomatic Java port in > > src/java.base/share/classes/java/lang/FdLibm.java > > First I debug the FdlibmTranslit port by running it against the C version. > Once that is working, I copy the port into the java.lang.FdLibm.java and do a > series of transformation to get the code closer to usual JDK style. PS The C file used as the basis of the port is src/java.base/share/native/libfdlibm/e_log10.c One difference to highlight between the original C and transliteration port is the line i = ((unsigned)k&0x80000000)>>31; // C version vs i = (k&0x80000000)>>>31; // unsigned shift ------------- PR: https://git.openjdk.org/jdk/pull/12242
