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- Make "ieee" core default, where applicable
- Import gcc configury to determine HOST_FLOAT_FORMAT
This commit is contained in:
gbeauche
parent
48986febc6
commit
9cc4185fa2
@ -13,16 +13,17 @@ AC_ARG_ENABLE(vosf, [ --enable-vosf enable video on SEGV sig
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dnl FPU emulation core.
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AC_ARG_ENABLE(fpe,
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[ --enable-fpe=which specify which fpu emulator to use [default=opt]],
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[ --enable-fpe=FPE specify which fpu emulator to use [default=auto]],
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[ case "$enableval" in
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dnl default is fpu_x86.cpp if i386 architecture, fpu_uae.cpp otherwise
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default) FPE_CORE="default";;
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ieee) FPE_CORE="ieee";;
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uae) FPE_CORE="uae";;
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*) AC_MSG_ERROR([--enable-fpe takes only one of the following values: default, uae, ieee]);;
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dnl default is always ieee, if architecture has this fp format
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auto) FPE_CORE_TEST_ORDER="ieee uae";;
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ieee) FPE_CORE_TEST_ORDER="ieee";;
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uae) FPE_CORE_TEST_ORDER="uae";;
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x86) FPE_CORE_TEST_ORDER="x86";;
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*) AC_MSG_ERROR([--enable-fpe takes only one of the following values: auto, x86, ieee, uae]);;
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esac
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],
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[ FPE_CORE="default"
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[ FPE_CORE_TEST_ORDER="ieee uae"
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])
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dnl Addressing modes.
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@ -795,7 +796,6 @@ fi
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dnl Select appropriate CPU source and REGPARAM define.
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ASM_OPTIMIZATIONS=none
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CPUSRCS="cpuemu1.cpp cpuemu2.cpp cpuemu3.cpp cpuemu4.cpp cpuemu5.cpp cpuemu6.cpp cpuemu7.cpp cpuemu8.cpp"
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FPUSRCS="../uae_cpu/fpu/fpu_uae.cpp"
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if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" -a "x$OS_TYPE" != "xfreebsd" ]]; then
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dnl i386 CPU
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DEFINES="$DEFINES -DREGPARAM=\"__attribute__((regparm(3)))\""
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@ -803,7 +803,6 @@ if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" -a "x$OS_TYPE" != "xfree
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ASM_OPTIMIZATIONS=i386
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DEFINES="$DEFINES -DX86_ASSEMBLY -DUNALIGNED_PROFITABLE -DOPTIMIZED_FLAGS"
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CPUSRCS="cpufast1.s cpufast2.s cpufast3.s cpufast4.s cpufast5.s cpufast6.s cpufast7.s cpufast8.s"
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FPUSRCS="../uae_cpu/fpu_x86.cpp"
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fi
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elif [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_SPARC" = "xyes" -a "x$HAVE_GAS" = "xyes" ]]; then
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dnl SPARC CPU
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@ -834,40 +833,178 @@ elif [[ "x$WANT_NATIVE_M68K" = "xyes" ]]; then
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CPUSRCS="asm_support.s"
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fi
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dnl Select appropriate FPU source.
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dnl 1. Optimized X86 assembly core if target is i386 architecture.
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SAVED_DEFINES=$DEFINES
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if [[ "x$FPE_CORE" = "xdefault" ]]; then
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if [[ "x$HAVE_GCC27" = "xyes" -a "x$HAVE_I386" = "xyes" -a "x$HAVE_GAS" = "xyes" ]]; then
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DEFINES="$DEFINES -DFPU_X86"
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FPE_CORE_STR="i386 optimized core"
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FPUSRCS="../uae_cpu/fpu/fpu_x86.cpp"
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FPE_CORE="i386"
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dnl Utility macro used by next two tests.
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dnl AC_EXAMINE_OBJECT(C source code,
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dnl commands examining object file,
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dnl [commands to run if compile failed]):
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dnl
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dnl Compile the source code to an object file; then convert it into a
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dnl printable representation. All unprintable characters and
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dnl asterisks (*) are replaced by dots (.). All white space is
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dnl deleted. Newlines (ASCII 0x10) in the input are preserved in the
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dnl output, but runs of newlines are compressed to a single newline.
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dnl Finally, line breaks are forcibly inserted so that no line is
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dnl longer than 80 columns and the file ends with a newline. The
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dnl result of all this processing is in the file conftest.dmp, which
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dnl may be examined by the commands in the second argument.
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dnl
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AC_DEFUN([gcc_AC_EXAMINE_OBJECT],
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[AC_LANG_SAVE
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AC_LANG_C
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dnl Next bit cribbed from AC_TRY_COMPILE.
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cat > conftest.$ac_ext <<EOF
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[#line __oline__ "configure"
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#include "confdefs.h"
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$1
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]EOF
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if AC_TRY_EVAL(ac_compile); then
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od -c conftest.o |
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sed ['s/^[0-7]*[ ]*/ /
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s/\*/./g
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s/ \\n/*/g
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s/ [0-9][0-9][0-9]/./g
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s/ \\[^ ]/./g'] |
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tr -d '
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' | tr -s '*' '
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' | fold | sed '$a\
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' > conftest.dmp
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$2
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ifelse($3, , , else
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$3
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)dnl
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fi
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rm -rf conftest*
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AC_LANG_RESTORE])
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dnl Floating point format probe.
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dnl The basic concept is the same as the above: grep the object
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dnl file for an interesting string. We have to watch out for
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dnl rounding changing the values in the object, however; this is
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dnl handled by ignoring the least significant byte of the float.
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dnl
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dnl Does not know about VAX G-float or C4x idiosyncratic format.
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dnl It does know about PDP-10 idiosyncratic format, but this is
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dnl not presently supported by GCC. S/390 "binary floating point"
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dnl is in fact IEEE (but maybe we should have that in EBCDIC as well
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dnl as ASCII?)
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dnl
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AC_DEFUN([gcc_AC_C_FLOAT_FORMAT],
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[AC_CACHE_CHECK(floating point format, ac_cv_c_float_format,
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[gcc_AC_EXAMINE_OBJECT(
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[/* This will not work unless sizeof(double) == 8. */
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extern char sizeof_double_must_be_8 [sizeof(double) == 8 ? 1 : -1];
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/* This structure must have no internal padding. */
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struct possibility {
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char prefix[8];
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double candidate;
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char postfix[8];
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};
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#define C(cand) { "\nformat:", cand, ":tamrof\n" }
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struct possibility table [] =
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{
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C( 3.25724264705901305206e+01), /* @@IEEEFP - IEEE 754 */
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C( 3.53802595280598432000e+18), /* D__float - VAX */
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C( 5.32201830133125317057e-19), /* D.PDP-10 - PDP-10 - the dot is 0x13a */
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C( 1.77977764695171661377e+10), /* IBMHEXFP - s/390 format, ascii */
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C(-5.22995989424860458374e+10) /* IBMHEXFP - s/390 format, EBCDIC */
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};],
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[if grep 'format:.@IEEEF.:tamrof' conftest.dmp >/dev/null 2>&1; then
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ac_cv_c_float_format='IEEE (big-endian)'
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elif grep 'format:.I@@PFE.:tamrof' conftest.dmp >/dev/null 2>&1; then
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ac_cv_c_float_format='IEEE (big-endian)'
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elif grep 'format:.FEEEI@.:tamrof' conftest.dmp >/dev/null 2>&1; then
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ac_cv_c_float_format='IEEE (little-endian)'
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elif grep 'format:.EFP@@I.:tamrof' conftest.dmp >/dev/null 2>&1; then
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ac_cv_c_float_format='IEEE (little-endian)'
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elif grep 'format:.__floa.:tamrof' conftest.dmp >/dev/null 2>&1; then
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ac_cv_c_float_format='VAX D-float'
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elif grep 'format:..PDP-1.:tamrof' conftest.dmp >/dev/null 2>&1; then
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ac_cv_c_float_format='PDP-10'
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elif grep 'format:.BMHEXF.:tamrof' conftest.dmp >/dev/null 2>&1; then
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ac_cv_c_float_format='IBM 370 hex'
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else
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FPE_CORE="uae"
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fi
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fi
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AC_MSG_ERROR(Unknown floating point format)
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fi],
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[AC_MSG_ERROR(compile failed)])
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])
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# IEEE is the default format. If the float endianness isn't the same
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# as the integer endianness, we have to set FLOAT_WORDS_BIG_ENDIAN
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# (which is a tristate: yes, no, default). This is only an issue with
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# IEEE; the other formats are only supported by a few machines each,
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# all with the same endianness.
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format=IEEE_FLOAT_FORMAT
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fbigend=
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case $ac_cv_c_float_format in
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'IEEE (big-endian)' )
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if test $ac_cv_c_bigendian = no; then
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fbigend=1
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fi
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;;
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'IEEE (little-endian)' )
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if test $ac_cv_c_bigendian = yes; then
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fbigend=0
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fi
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;;
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'VAX D-float' )
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format=VAX_FLOAT_FORMAT
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;;
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'PDP-10' )
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format=PDP10_FLOAT_FORMAT
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;;
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'IBM 370 hex' )
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format=IBM_FLOAT_FORMAT
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;;
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esac
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AC_DEFINE_UNQUOTED(HOST_FLOAT_FORMAT, $format,
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[Define to the floating point format of the host machine.])
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if test -n "$fbigend"; then
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AC_DEFINE_UNQUOTED(HOST_FLOAT_WORDS_BIG_ENDIAN, $fbigend,
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[Define to 1 if the host machine stores floating point numbers in
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memory with the word containing the sign bit at the lowest address,
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or to 0 if it does it the other way around.
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dnl 2. JIT-FPU only supports IEEE-based implementation.
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if [[ "x$WANT_JIT_FPU" = "xyes" -a "x$FPE_CORE" != "xieee" ]]; then
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AC_MSG_WARN([Sorry, JIT-FPU supports only the "ieee" FPE implementation])
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FPE_CORE="ieee"
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dnl Restore previous variables. FPE_CORE_STR and FPUSRCS are overwritten
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DEFINES=$SAVED_DEFINES
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This macro should not be defined if the ordering is the same as for
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multi-word integers.])
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fi
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])
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dnl 3. Choose either IEEE-based implementation or the old UAE core.
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if [[ "x$FPE_CORE" = "xieee" ]]; then
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AC_CHECK_HEADERS(fenv.h)
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AC_CHECK_FUNCS(feclearexcept fegetexceptflag feraiseexcept fesetexceptflag fetestexcept)
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AC_CHECK_FUNCS(fegetround fesetround)
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DEFINES="$DEFINES -DFPU_IEEE"
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FPE_CORE_STR="ieee-based fpu core"
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FPUSRCS="../uae_cpu/fpu/fpu_ieee.cpp"
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elif [[ "x$FPE_CORE" = "xuae" ]]; then
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DEFINES="$DEFINES -DFPU_UAE"
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FPE_CORE_STR="original uae core"
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FPUSRCS="../uae_cpu/fpu/fpu_uae.cpp"
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dnl Select appropriate FPU source.
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gcc_AC_C_FLOAT_FORMAT
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AC_CHECK_HEADERS(ieee754.h ieeefp.h floatingpoint.h nan.h)
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for fpe in $FPE_CORE_TEST_ORDER; do
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case $fpe in
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ieee)
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if echo "$ac_cv_c_float_format" | grep -q IEEE; then
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FPE_CORE="IEEE fpu core"
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DEFINES="$DEFINES -DFPU_IEEE"
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FPUSRCS="../uae_cpu/fpu/fpu_ieee.cpp"
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break
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fi
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;;
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x86)
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if [[ ":$HAVE_GCC27:$HAVE_I386:$HAVE_GAS:" = ":yes:yes:yes:" ]]; then
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FPE_CORE="i387 fpu core"
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DEFINES="$DEFINES -DFPU_X86"
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FPUSRCS="../uae_cpu/fpu/fpu_x86.cpp"
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break
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fi
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;;
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uae)
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FPE_CORE="uae fpu core"
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DEFINES="$DEFINES -DFPU_UAE"
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FPUSRCS="../uae_cpu/fpu/fpu_uae.cpp"
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break
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;;
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*)
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AC_MSG_ERROR([Internal configure.in script error for $fpe fpu core])
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;;
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esac
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done
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if [[ "x$FPE_CORE" = "x" ]]; then
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AC_MSG_ERROR([Sorry, no suitable FPU core found in $FPE_CORE_TEST_ORDER])
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fi
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dnl Check for certain math functions
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@ -914,7 +1051,7 @@ echo ESD sound support ...................... : $WANT_ESD
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echo GTK user interface ..................... : $WANT_GTK
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echo mon debugger support ................... : $WANT_MON
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echo Running m68k code natively ............. : $WANT_NATIVE_M68K
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echo Floating-Point emulation core .......... : $FPE_CORE_STR
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echo Floating-Point emulation core .......... : $FPE_CORE
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echo Assembly optimizations ................. : $ASM_OPTIMIZATIONS
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echo Addressing mode ........................ : $ADDRESSING_MODE
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echo
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@ -158,6 +158,14 @@ typedef struct timespec tm_time_t;
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typedef struct timeval tm_time_t;
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#endif
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/* Define codes for all the float formats that we know of.
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* Though we only handle IEEE format. */
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#define UNKNOWN_FLOAT_FORMAT 0
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#define IEEE_FLOAT_FORMAT 1
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#define VAX_FLOAT_FORMAT 2
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#define IBM_FLOAT_FORMAT 3
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#define C4X_FLOAT_FORMAT 4
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/* UAE CPU data types */
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#define uae_s8 int8
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#define uae_u8 uint8
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