1GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. 2# Local configure fragment for sysdeps/s390. 3 4AC_CACHE_CHECK(for __builtin_tbegin, libc_cv_gcc_builtin_tbegin, [dnl 5cat > conftest.c <<\EOF 6#include <htmintrin.h> 7void testtransaction () 8{ 9 if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED) 10 { 11 __builtin_tend (); 12 } 13} 14EOF 15dnl 16dnl test, if the tbegin instruction is used by __builtin_tbegin 17if AC_TRY_COMMAND([${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null]) ; 18then 19 libc_cv_gcc_builtin_tbegin=yes 20else 21 libc_cv_gcc_builtin_tbegin=no 22fi 23rm -f conftest* ]) 24 25if test "$libc_cv_gcc_builtin_tbegin" = no ; then 26 critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390." 27fi 28 29 30AC_CACHE_CHECK(for S390 vector instruction support, libc_cv_asm_s390_vx, [dnl 31cat > conftest.c <<\EOF 32void testvecinsn () 33{ 34 __asm__ (".machine \"z13\" \n\t" 35 ".machinemode \"zarch_nohighgprs\" \n\t" 36 "vistrbs %%v16,%%v17 \n\t" 37 "locghie %%r1,0" : :); 38} 39EOF 40dnl 41dnl test, if assembler supports S390 vector instructions 42if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ; 43then 44 libc_cv_asm_s390_vx=yes 45else 46 libc_cv_asm_s390_vx=no 47fi 48rm -f conftest* ]) 49 50if test "$libc_cv_asm_s390_vx" = yes ; 51then 52 AC_DEFINE(HAVE_S390_VX_ASM_SUPPORT) 53else 54 AC_MSG_WARN([Use binutils with vector-support in order to use optimized implementations.]) 55fi 56 57AC_CACHE_CHECK(for S390 vector support in gcc, libc_cv_gcc_s390_vx, [dnl 58cat > conftest.c <<\EOF 59void testvecclobber () 60{ 61 __asm__ ("" : : : "v16"); 62} 63EOF 64dnl 65dnl test, if gcc supports S390 vector registers as clobber in inline assembly 66if AC_TRY_COMMAND([${CC-cc} --shared conftest.c -o conftest.o &> /dev/null]) ; 67then 68 libc_cv_gcc_s390_vx=yes 69else 70 libc_cv_gcc_s390_vx=no 71fi 72rm -f conftest* ]) 73 74if test "$libc_cv_gcc_s390_vx" = yes ; 75then 76 AC_DEFINE(HAVE_S390_VX_GCC_SUPPORT) 77fi 78 79AC_CACHE_CHECK(for S390 arch13 zarch instruction support, 80 libc_cv_asm_s390_arch13, [dnl 81cat > conftest.c <<\EOF 82void testinsn (char *buf) 83{ 84 __asm__ (".machine \"arch13\" \n\t" 85 ".machinemode \"zarch_nohighgprs\" \n\t" 86 "lghi %%r0,16 \n\t" 87 "mvcrl 0(%0),32(%0) \n\t" 88 "vstrs %%v20,%%v20,%%v20,%%v20,0,2" 89 : : "a" (buf) : "memory", "r0"); 90} 91EOF 92dnl test, if assembler supports S390 arch13 instructions 93if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c 94 -o conftest.o &> /dev/null]) ; 95then 96 libc_cv_asm_s390_arch13=yes 97else 98 libc_cv_asm_s390_arch13=no 99fi 100rm -f conftest* ]) 101if test "$libc_cv_asm_s390_arch13" = yes ; 102then 103 AC_DEFINE(HAVE_S390_ARCH13_ASM_SUPPORT) 104fi 105 106 107AC_CACHE_CHECK(for S390 z10 zarch instruction support as default, 108 libc_cv_asm_s390_min_z10_zarch, [dnl 109cat > conftest.c <<\EOF 110void testinsn (void *a, void *b, int n) 111{ 112 __asm__ ("exrl %2,1f \n\t" 113 "j 2f \n\t" 114 "1: mvc 0(1,%0),0(%1) \n\t" 115 "2:" 116 : : "a" (a), "a" (b), "d" (n) 117 : "memory", "cc"); 118} 119EOF 120dnl 121dnl test, if assembler supports S390 z10 zarch instructions as default 122if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c 123 -o conftest.o &> /dev/null]) ; 124then 125 libc_cv_asm_s390_min_z10_zarch=yes 126else 127 libc_cv_asm_s390_min_z10_zarch=no 128fi 129rm -f conftest* ]) 130 131if test "$libc_cv_asm_s390_min_z10_zarch" = yes ; 132then 133 AC_DEFINE(HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT) 134fi 135 136AC_CACHE_CHECK(for S390 z196 zarch instruction support as default, 137 libc_cv_asm_s390_min_z196_zarch, [dnl 138cat > conftest.c <<\EOF 139float testinsn (double e) 140{ 141 float d; 142 __asm__ ("ledbra %0,5,%1,4" : "=f" (d) : "f" (e) ); 143 return d; 144} 145EOF 146dnl 147dnl test, if assembler supports S390 z196 zarch instructions as default 148if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c 149 -o conftest.o &> /dev/null]) ; 150then 151 libc_cv_asm_s390_min_z196_zarch=yes 152else 153 libc_cv_asm_s390_min_z196_zarch=no 154fi 155rm -f conftest* ]) 156 157if test "$libc_cv_asm_s390_min_z196_zarch" = yes ; 158then 159 AC_DEFINE(HAVE_S390_MIN_Z196_ZARCH_ASM_SUPPORT) 160fi 161 162AC_CACHE_CHECK(for S390 z13 zarch instruction support as default, 163 libc_cv_asm_s390_min_z13_zarch, [dnl 164cat > conftest.c <<\EOF 165int testinsn (void) 166{ 167 int i; 168 __asm__ ("vl %%v16,0(%%r15)\n\t" 169 "vlgvf %0,%%v16,0" 170 : "=d" (i) : : "memory", "v16"); 171 return i; 172} 173EOF 174dnl 175dnl test, if assembler supports S390 z13 zarch instructions as default 176if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c 177 -o conftest.o &> /dev/null]) ; 178then 179 libc_cv_asm_s390_min_z13_zarch=yes 180else 181 libc_cv_asm_s390_min_z13_zarch=no 182fi 183rm -f conftest* ]) 184 185if test "$libc_cv_asm_s390_min_z13_zarch" = yes ; 186then 187 AC_DEFINE(HAVE_S390_MIN_Z13_ZARCH_ASM_SUPPORT) 188fi 189 190AC_CACHE_CHECK(for S390 arch13 zarch instruction support as default, 191 libc_cv_asm_s390_min_arch13_zarch, [dnl 192cat > conftest.c <<\EOF 193void testinsn (char *buf) 194{ 195 __asm__ ("lghi %%r0,16 \n\t" 196 "mvcrl 0(%0),32(%0) \n\t" 197 "vstrs %%v20,%%v20,%%v20,%%v20,0,2" 198 : : "a" (buf) : "memory", "r0"); 199} 200EOF 201dnl test, if assembler supports S390 arch13 zarch instructions as default 202if AC_TRY_COMMAND([${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS --shared conftest.c 203 -o conftest.o &> /dev/null]) ; 204then 205 libc_cv_asm_s390_min_arch13_zarch=yes 206else 207 libc_cv_asm_s390_min_arch13_zarch=no 208fi 209rm -f conftest* ]) 210if test "$libc_cv_asm_s390_min_arch13_zarch" = yes ; 211then 212 AC_DEFINE(HAVE_S390_MIN_ARCH13_ZARCH_ASM_SUPPORT) 213fi 214 215dnl test if GCC is new enough. See gcc "Bug 98269 - gcc 6.5.0 216dnl __builtin_add_overflow() with small uint32_t values incorrectly detects 217dnl overflow 218dnl (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98269) 219AC_CACHE_CHECK([if $CC is sufficient to build libc on s390x], 220libc_cv_compiler_ok_on_s390x, [ 221AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[]], [[ 222#if !defined __GNUC__ || __GNUC__ < 7 || (__GNUC__ == 7 && __GNUC_MINOR__ < 1) 223#error insufficient compiler for building on s390x 224#endif 225]])], 226 [libc_cv_compiler_ok_on_s390x=yes], 227 [libc_cv_compiler_ok_on_s390x=no])]) 228if test "$libc_cv_compiler_ok_on_s390x" != yes; then 229 critic_missing="$critic_missing On s390x, GCC >= 7.1.0 is required." 230fi 231 232test -n "$critic_missing" && AC_MSG_ERROR([ 233*** $critic_missing]) 234