238 lines
6.3 KiB
Plaintext
238 lines
6.3 KiB
Plaintext
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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Local configure fragment for sysdeps/s390.
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dnl It is always possible to access static and hidden symbols in an
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dnl position independent way.
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AC_DEFINE(PI_STATIC_AND_HIDDEN)
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AC_CACHE_CHECK(for __builtin_tbegin, libc_cv_gcc_builtin_tbegin, [dnl
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cat > conftest.c <<\EOF
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#include <htmintrin.h>
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void testtransaction ()
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{
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if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED)
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{
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__builtin_tend ();
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}
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}
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EOF
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dnl
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dnl test, if the tbegin instruction is used by __builtin_tbegin
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if AC_TRY_COMMAND([${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null]) ;
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then
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libc_cv_gcc_builtin_tbegin=yes
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else
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libc_cv_gcc_builtin_tbegin=no
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fi
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rm -f conftest* ])
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if test "$libc_cv_gcc_builtin_tbegin" = no ; then
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critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390."
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fi
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AC_CACHE_CHECK(for S390 vector instruction support, libc_cv_asm_s390_vx, [dnl
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cat > conftest.c <<\EOF
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void testvecinsn ()
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{
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__asm__ (".machine \"z13\" \n\t"
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".machinemode \"zarch_nohighgprs\" \n\t"
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"vistrbs %%v16,%%v17 \n\t"
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"locghie %%r1,0" : :);
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}
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EOF
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dnl
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dnl test, if assembler supports S390 vector instructions
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if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ;
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then
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libc_cv_asm_s390_vx=yes
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else
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libc_cv_asm_s390_vx=no
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fi
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rm -f conftest* ])
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if test "$libc_cv_asm_s390_vx" = yes ;
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then
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AC_DEFINE(HAVE_S390_VX_ASM_SUPPORT)
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else
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AC_MSG_WARN([Use binutils with vector-support in order to use optimized implementations.])
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fi
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AC_CACHE_CHECK(for S390 vector support in gcc, libc_cv_gcc_s390_vx, [dnl
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cat > conftest.c <<\EOF
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void testvecclobber ()
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{
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__asm__ ("" : : : "v16");
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}
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EOF
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dnl
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dnl test, if gcc supports S390 vector registers as clobber in inline assembly
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if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ;
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then
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libc_cv_gcc_s390_vx=yes
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else
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libc_cv_gcc_s390_vx=no
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fi
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rm -f conftest* ])
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if test "$libc_cv_gcc_s390_vx" = yes ;
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then
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AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT)
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fi
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AC_CACHE_CHECK(for S390 arch13 zarch instruction support,
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libc_cv_asm_s390_arch13, [dnl
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cat > conftest.c <<\EOF
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void testinsn (char *buf)
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{
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__asm__ (".machine \"arch13\" \n\t"
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".machinemode \"zarch_nohighgprs\" \n\t"
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"lghi %%r0,16 \n\t"
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"mvcrl 0(%0),32(%0) \n\t"
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"vstrs %%v20,%%v20,%%v20,%%v20,0,2"
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: : "a" (buf) : "memory", "r0");
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}
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EOF
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dnl test, if assembler supports S390 arch13 instructions
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if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
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-o conftest.o &> /dev/null]) ;
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then
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libc_cv_asm_s390_arch13=yes
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else
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libc_cv_asm_s390_arch13=no
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fi
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rm -f conftest* ])
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if test "$libc_cv_asm_s390_arch13" = yes ;
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then
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AC_DEFINE(HAVE_S390_ARCH13_ASM_SUPPORT)
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fi
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AC_CACHE_CHECK(for S390 z10 zarch instruction support as default,
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libc_cv_asm_s390_min_z10_zarch, [dnl
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cat > conftest.c <<\EOF
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void testinsn (void *a, void *b, int n)
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{
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__asm__ ("exrl %2,1f \n\t"
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"j 2f \n\t"
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"1: mvc 0(1,%0),0(%1) \n\t"
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"2:"
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: : "a" (a), "a" (b), "d" (n)
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: "memory", "cc");
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}
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EOF
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dnl
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dnl test, if assembler supports S390 z10 zarch instructions as default
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if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
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-o conftest.o &> /dev/null]) ;
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then
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libc_cv_asm_s390_min_z10_zarch=yes
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else
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libc_cv_asm_s390_min_z10_zarch=no
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fi
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rm -f conftest* ])
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if test "$libc_cv_asm_s390_min_z10_zarch" = yes ;
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then
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AC_DEFINE(HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT)
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fi
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AC_CACHE_CHECK(for S390 z196 zarch instruction support as default,
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libc_cv_asm_s390_min_z196_zarch, [dnl
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cat > conftest.c <<\EOF
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float testinsn (double e)
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{
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float d;
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__asm__ ("ledbra %0,5,%1,4" : "=f" (d) : "f" (e) );
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return d;
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}
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EOF
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dnl
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dnl test, if assembler supports S390 z196 zarch instructions as default
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if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
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-o conftest.o &> /dev/null]) ;
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then
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libc_cv_asm_s390_min_z196_zarch=yes
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else
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libc_cv_asm_s390_min_z196_zarch=no
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fi
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rm -f conftest* ])
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if test "$libc_cv_asm_s390_min_z196_zarch" = yes ;
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then
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AC_DEFINE(HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT)
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fi
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AC_CACHE_CHECK(for S390 z13 zarch instruction support as default,
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libc_cv_asm_s390_min_z13_zarch, [dnl
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cat > conftest.c <<\EOF
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int testinsn (void)
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{
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int i;
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__asm__ ("vl %%v16,0(%%r15)\n\t"
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"vlgvf %0,%%v16,0"
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: "=d" (i) : : "memory", "v16");
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return i;
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}
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EOF
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dnl
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dnl test, if assembler supports S390 z13 zarch instructions as default
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if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
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-o conftest.o &> /dev/null]) ;
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then
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libc_cv_asm_s390_min_z13_zarch=yes
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else
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libc_cv_asm_s390_min_z13_zarch=no
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fi
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rm -f conftest* ])
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if test "$libc_cv_asm_s390_min_z13_zarch" = yes ;
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then
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AC_DEFINE(HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT)
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fi
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AC_CACHE_CHECK(for S390 arch13 zarch instruction support as default,
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libc_cv_asm_s390_min_arch13_zarch, [dnl
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cat > conftest.c <<\EOF
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void testinsn (char *buf)
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{
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__asm__ ("lghi %%r0,16 \n\t"
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"mvcrl 0(%0),32(%0) \n\t"
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"vstrs %%v20,%%v20,%%v20,%%v20,0,2"
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: : "a" (buf) : "memory", "r0");
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}
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EOF
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dnl test, if assembler supports S390 arch13 zarch instructions as default
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if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c
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-o conftest.o &> /dev/null]) ;
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then
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libc_cv_asm_s390_min_arch13_zarch=yes
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else
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libc_cv_asm_s390_min_arch13_zarch=no
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fi
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rm -f conftest* ])
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if test "$libc_cv_asm_s390_min_arch13_zarch" = yes ;
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then
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AC_DEFINE(HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT)
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fi
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dnl test if GCC is new enough. See gcc "Bug 98269 - gcc 6.5.0
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dnl __builtin_add_overflow() with small uint32_t values incorrectly detects
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dnl overflow
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dnl (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98269)
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AC_CACHE_CHECK([if $CC is sufficient to build libc on s390x],
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libc_cv_compiler_ok_on_s390x, [
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AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[
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#if !defined __GNUC__ || __GNUC__ < 7 || (__GNUC__ == 7 && __GNUC_MINOR__ < 1)
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#error insufficient compiler for building on s390x
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#endif
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]])],
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[libc_cv_compiler_ok_on_s390x=yes],
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[libc_cv_compiler_ok_on_s390x=no])])
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if test "$libc_cv_compiler_ok_on_s390x" != yes; then
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critic_missing="$critic_missing On s390x, GCC >= 7.1.0 is required."
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fi
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test -n "$critic_missing" && AC_MSG_ERROR([
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*** $critic_missing])
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