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| author | Duncan Sands <baldrick@free.fr> | 2007-12-10 17:43:13 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2007-12-10 17:43:13 +0000 |
| commit | 1eff70451fbb079c1d5b8f45ff8c8a2b8f74d7ba (patch) | |
| tree | 6ea58d5ba05a4007f3278611d3c90be7c39f8ab5 /autoconf | |
| parent | 3a7bcc4d1badce527e2caae2f400c1a91abdbed8 (diff) | |
| download | llvm-1eff70451fbb079c1d5b8f45ff8c8a2b8f74d7ba.tar.gz llvm-1eff70451fbb079c1d5b8f45ff8c8a2b8f74d7ba.tar.bz2 llvm-1eff70451fbb079c1d5b8f45ff8c8a2b8f74d7ba.tar.xz | |
Fix PR1836: in the interpreter, read and write apints
using the minimum possible number of bytes. For little
endian targets run on little endian machines, apints are
stored in memory from LSB to MSB as before. For big endian
targets on big endian machines they are stored from MSB to
LSB which wasn't always the case before (if the target and
host endianness doesn't match values are stored according
to the host's endianness). Doing this requires knowing the
endianness of the host, which is determined when configuring -
thanks go to Anton for this. Only having access to little
endian machines I was unable to properly test the big endian
part, which is also the most complicated...
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44796 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'autoconf')
| -rw-r--r-- | autoconf/configure.ac | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/autoconf/configure.ac b/autoconf/configure.ac index 979e3a8986..fe16b5073e 100644 --- a/autoconf/configure.ac +++ b/autoconf/configure.ac @@ -227,7 +227,10 @@ dnl Define a substitution, ARCH, for the target architecture AC_SUBST(ARCH,$llvm_cv_target_arch) dnl Check for the endianness of the target -AC_C_BIGENDIAN(AC_SUBST([ENDIAN],[big]),AC_SUBST([ENDIAN],[little])) +AC_C_BIGENDIAN([AC_SUBST([ENDIAN],[big]), + AC_DEFINE([MSB_FIRST], [1], [Define if this target is big endian])], + [AC_SUBST([ENDIAN],[little]), + AC_DEFINE([LSB_FIRST], [1], [Define if this target is little endian])]) dnl Check for build platform executable suffix if we're crosscompiling if test "$cross_compiling" = yes; then |