X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=m4%2Fnasm.m4;fp=m4%2Fnasm.m4;h=978a469b3416132558c61188b29619850fae2f75;hp=0000000000000000000000000000000000000000;hb=19ce03addb8071555d951a965fa0bd7e3ae7224b;hpb=4a0639235f5f6e28ce9c9cbd21edc71199f85d09

diff --git a/m4/nasm.m4 b/m4/nasm.m4
new file mode 100644
index 00000000..978a469b
--- /dev/null
+++ b/m4/nasm.m4
@@ -0,0 +1,212 @@
+# AC_PROG_NASM
+# --------------------------
+# Check that NASM exists and determine flags
+AC_DEFUN([AC_PROG_NASM],[
+
+AC_CHECK_PROGS(NASM, [nasm nasmw yasm])
+test -z "$NASM" && AC_MSG_ERROR([no nasm (Netwide Assembler) found])
+
+AC_MSG_CHECKING([for object file format of host system])
+case "$host_os" in
+  cygwin* | mingw* | pw32* | interix*)
+    case "$host_cpu" in
+      x86_64)
+        objfmt='Win64-COFF'
+        ;;
+      *)
+        objfmt='Win32-COFF'
+        ;;
+    esac
+  ;;
+  msdosdjgpp* | go32*)
+    objfmt='COFF'
+  ;;
+  os2-emx*)			# not tested
+    objfmt='MSOMF'		# obj
+  ;;
+  linux*coff* | linux*oldld*)
+    objfmt='COFF'		# ???
+  ;;
+  linux*aout*)
+    objfmt='a.out'
+  ;;
+  linux*)
+    case "$host_cpu" in
+      x86_64)
+        objfmt='ELF64'
+        ;;
+      *)
+        objfmt='ELF'
+        ;;
+    esac
+  ;;
+  kfreebsd* | freebsd* | netbsd* | openbsd*)
+    if echo __ELF__ | $CC -E - | grep __ELF__ > /dev/null; then
+      objfmt='BSD-a.out'
+    else
+      case "$host_cpu" in
+        x86_64 | amd64)
+          objfmt='ELF64'
+          ;;
+        *)
+          objfmt='ELF'
+          ;;
+      esac
+    fi
+  ;;
+  solaris* | sunos* | sysv* | sco*)
+    case "$host_cpu" in
+      x86_64)
+        objfmt='ELF64'
+        ;;
+      *)
+        objfmt='ELF'
+        ;;
+    esac
+  ;;
+  darwin* | rhapsody* | nextstep* | openstep* | macos*)
+    case "$host_cpu" in
+      x86_64)
+        objfmt='Mach-O64'
+        ;;
+      *)
+        objfmt='Mach-O'
+        ;;
+    esac
+  ;;
+  *)
+    objfmt='ELF ?'
+  ;;
+esac
+
+AC_MSG_RESULT([$objfmt])
+if test "$objfmt" = 'ELF ?'; then
+  objfmt='ELF'
+  AC_MSG_WARN([unexpected host system. assumed that the format is $objfmt.])
+fi
+
+AC_MSG_CHECKING([for object file format specifier (NAFLAGS) ])
+case "$objfmt" in
+  MSOMF)      NAFLAGS='-fobj -DOBJ32';;
+  Win32-COFF) NAFLAGS='-fwin32 -DWIN32';;
+  Win64-COFF) NAFLAGS='-fwin64 -DWIN64 -D__x86_64__';;
+  COFF)       NAFLAGS='-fcoff -DCOFF';;
+  a.out)      NAFLAGS='-faout -DAOUT';;
+  BSD-a.out)  NAFLAGS='-faoutb -DAOUT';;
+  ELF)        NAFLAGS='-felf -DELF';;
+  ELF64)      NAFLAGS='-felf64 -DELF -D__x86_64__';;
+  RDF)        NAFLAGS='-frdf -DRDF';;
+  Mach-O)     NAFLAGS='-fmacho -DMACHO';;
+  Mach-O64)   NAFLAGS='-fmacho64 -DMACHO -D__x86_64__';;
+esac
+AC_MSG_RESULT([$NAFLAGS])
+AC_SUBST([NAFLAGS])
+
+AC_MSG_CHECKING([whether the assembler ($NASM $NAFLAGS) works])
+cat > conftest.asm <<EOF
+[%line __oline__ "configure"
+        section .text
+        global  _main,main
+_main:
+main:   xor     eax,eax
+        ret
+]EOF
+try_nasm='$NASM $NAFLAGS -o conftest.o conftest.asm'
+if AC_TRY_EVAL(try_nasm) && test -s conftest.o; then
+  AC_MSG_RESULT(yes)
+else
+  echo "configure: failed program was:" >&AC_FD_CC
+  cat conftest.asm >&AC_FD_CC
+  rm -rf conftest*
+  AC_MSG_RESULT(no)
+  AC_MSG_ERROR([installation or configuration problem: assembler cannot create object files.])
+fi
+
+AC_MSG_CHECKING([whether the linker accepts assembler output])
+try_nasm='${CC-cc} -o conftest${ac_exeext} $LDFLAGS conftest.o $LIBS 1>&AC_FD_CC'
+if AC_TRY_EVAL(try_nasm) && test -s conftest${ac_exeext}; then
+  rm -rf conftest*
+  AC_MSG_RESULT(yes)
+else
+  rm -rf conftest*
+  AC_MSG_RESULT(no)
+  AC_MSG_ERROR([configuration problem: maybe object file format mismatch.])
+fi
+
+])
+
+# AC_CHECK_COMPATIBLE_ARM_ASSEMBLER_IFELSE
+# --------------------------
+# Test whether the assembler is suitable and supports NEON instructions
+AC_DEFUN([AC_CHECK_COMPATIBLE_ARM_ASSEMBLER_IFELSE],[
+  ac_good_gnu_arm_assembler=no
+  ac_save_CC="$CC"
+  ac_save_CFLAGS="$CFLAGS"
+  CFLAGS="$CCASFLAGS -x assembler-with-cpp"
+  CC="$CCAS"
+  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+    .text
+    .fpu neon
+    .arch armv7a
+    .object_arch armv4
+    .arm
+    pld [r0]
+    vmovn.u16 d0, q0]])], ac_good_gnu_arm_assembler=yes)
+
+  ac_use_gas_preprocessor=no
+  if test "x$ac_good_gnu_arm_assembler" = "xno" ; then
+    CC="gas-preprocessor.pl $CCAS"
+    AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+      .text
+      .fpu neon
+      .arch armv7a
+      .object_arch armv4
+      .arm
+      pld [r0]
+      vmovn.u16 d0, q0]])], ac_use_gas_preprocessor=yes)
+  fi
+  CFLAGS="$ac_save_CFLAGS"
+  CC="$ac_save_CC"
+
+  if test "x$ac_use_gas_preprocessor" = "xyes" ; then
+    CCAS="gas-preprocessor.pl $CCAS"
+    AC_SUBST([CCAS])
+    ac_good_gnu_arm_assembler=yes
+  fi
+
+  if test "x$ac_good_gnu_arm_assembler" = "xyes" ; then
+    $1
+  else
+    $2
+  fi
+])
+
+# AC_CHECK_COMPATIBLE_MIPSEL_ASSEMBLER_IFELSE
+# --------------------------
+# Test whether the assembler is suitable and supports MIPS instructions
+AC_DEFUN([AC_CHECK_COMPATIBLE_MIPSEL_ASSEMBLER_IFELSE],[
+  have_mips_dspr2=no
+  ac_save_CFLAGS="$CFLAGS"
+  CFLAGS="$CCASFLAGS -mdspr2"
+
+  AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+
+  int main ()
+  {
+    int c = 0, a = 0, b = 0;
+    __asm__ __volatile__ (
+        "precr.qb.ph %[c], %[a], %[b]          \n\t"
+        : [c] "=r" (c)
+        : [a] "r" (a), [b] "r" (b)
+    );
+    return c;
+  }
+  ]])], have_mips_dspr2=yes)
+  CFLAGS=$ac_save_CFLAGS
+
+  if test "x$have_mips_dspr2" = "xyes" ; then
+    $1
+  else
+    $2
+  fi
+])