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| author | Kevin Ryde <user42@zip.com.au> | 2000-11-21 22:19:40 +0100 |
|---|---|---|
| committer | Kevin Ryde <user42@zip.com.au> | 2000-11-21 22:19:40 +0100 |
| commit | 93ac1cc540bec2499be8a1fd66b441f7d6ecbe4e (patch) | |
| tree | 4c566b31e971f32864af0b44b9bb00e7c4678ed6 /acinclude.m4 | |
| parent | 49de2eb44085d7a98dbda5ffc6346107d68466b2 (diff) | |
| download | gmp-93ac1cc540bec2499be8a1fd66b441f7d6ecbe4e.tar.gz | |
* acinclude.m4 (GMP_ASM_X86_MMX) [*-*-solaris*]: Check for solaris
2.6 "as" movq bug.
Diffstat (limited to 'acinclude.m4')
| -rw-r--r-- | acinclude.m4 | 47 |
1 files changed, 39 insertions, 8 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 04ae5e5a2..1cb8a1428 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -836,19 +836,43 @@ dnl This macro is wanted before GMP_ASM_TEXT, so ".text" is hard coded dnl here. ".text" is believed to be correct on all x86 systems, certainly dnl it's all GMP_ASM_TEXT gives currently. Actually ".text" probably isn't dnl needed at all, at least for just checking instruction syntax. +dnl +dnl "movq %mm0, %mm1" should assemble as "0f 6f c8", but Solaris 2.6 +dnl wrongly assembles it as "0f 6f c1" (that being the reverse "movq %mm1, +dnl %mm0"). It doesn't seem worth bothering to work around this bug, so +dnl just detect it. AC_DEFUN(GMP_ASM_X86_MMX, [AC_CACHE_CHECK([if the assembler knows about MMX instructions], gmp_cv_asm_x86_mmx, [GMP_TRY_ASSEMBLE( [ .text - por %mm0, %mm0], - gmp_cv_asm_x86_mmx=yes, - gmp_cv_asm_x86_mmx=no) -]) -if test "$gmp_cv_asm_x86_mmx" = "yes"; then - ifelse([$1], , :, [$1]) -else + movq %mm0, %mm1], +[gmp_cv_asm_x86_mmx=yes +case $host in +*-*-solaris*) + if (dis conftest.o >conftest.out) 2>&AC_FD_CC; then + if grep "0f 6f c1" conftest.out >/dev/null; then + gmp_cv_asm_x86_mmx=movq-bug + fi + else + AC_MSG_WARN([\"dis\" not available to check for \"as\" movq bug]) + fi +esac], +[gmp_cv_asm_x86_mmx=no])]) + +case $gmp_cv_asm_x86_mmx in +movq-bug) + AC_MSG_WARN([+----------------------------------------------------------]) + AC_MSG_WARN([| WARNING WARNING WARNING]) + AC_MSG_WARN([| Target CPU has MMX code, but the assembler]) + AC_MSG_WARN([| $CCAS $CFLAGS]) + AC_MSG_WARN([| has the Solaris 2.6 bug where reg->reg movqs are reversed.]) + AC_MSG_WARN([| Non-MMX replacements will be used.]) + AC_MSG_WARN([| This will be an inferior build.]) + AC_MSG_WARN([+----------------------------------------------------------]) + ;; +no) AC_MSG_WARN([+----------------------------------------------------------]) AC_MSG_WARN([| WARNING WARNING WARNING]) AC_MSG_WARN([| Target CPU has MMX code, but it can't be assembled by]) @@ -856,11 +880,18 @@ else AC_MSG_WARN([| Non-MMX replacements will be used.]) AC_MSG_WARN([| This will be an inferior build.]) AC_MSG_WARN([+----------------------------------------------------------]) - ifelse([$2], , :, [$2]) + ;; +esac +if test "$gmp_cv_asm_x86_mmx" = yes; then + ifelse([$1],,:,[$1]) +else + ifelse([$2],,:,[$2]) fi ]) + + dnl GMP_ASM_X86_SHLDL_CL dnl -------------------- |