mirror of
https://github.com/kanjitalk755/macemu.git
synced 2025-01-12 01:30:03 +00:00
Extend internal math library from GNU libc to accomodate older systems
with glibc 2.2.X or simply no C99 capable C library. Fix vrfiz instruction to really truncate on float values.
This commit is contained in:
gbeauche
parent
28a167b3bd
commit
f226f793dd
@ -347,7 +347,8 @@ AC_CHECK_FUNCS(sigaction signal)
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AC_CHECK_FUNCS(mmap mprotect munmap)
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AC_CHECK_FUNCS(vm_allocate vm_deallocate vm_protect)
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AC_CHECK_FUNCS(posix_memalign memalign valloc)
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AC_CHECK_FUNCS(exp2f log2f exp2 log2 trunc)
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AC_CHECK_FUNCS(exp2f log2f exp2 log2)
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AC_CHECK_FUNCS(floorf roundf ceilf truncf floor round ceil trunc)
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dnl Darwin seems to define mach_task_self() instead of task_self().
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AC_CHECK_FUNCS(mach_task_self task_self)
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@ -999,6 +1000,146 @@ EOF
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fi
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AC_MSG_RESULT($WANT_ADDRESSING_MODE)
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dnl Utility macro used by next two tests.
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dnl AC_EXAMINE_OBJECT(C source code,
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dnl commands examining object file,
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dnl [commands to run if compile failed]):
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dnl
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dnl Compile the source code to an object file; then convert it into a
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dnl printable representation. All unprintable characters and
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dnl asterisks (*) are replaced by dots (.). All white space is
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dnl deleted. Newlines (ASCII 0x10) in the input are preserved in the
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dnl output, but runs of newlines are compressed to a single newline.
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dnl Finally, line breaks are forcibly inserted so that no line is
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dnl longer than 80 columns and the file ends with a newline. The
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dnl result of all this processing is in the file conftest.dmp, which
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dnl may be examined by the commands in the second argument.
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dnl
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AC_DEFUN([gcc_AC_EXAMINE_OBJECT],
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[AC_LANG_SAVE
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AC_LANG_C
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dnl Next bit cribbed from AC_TRY_COMPILE.
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cat > conftest.$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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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, $fbigend,
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[Define to 1 if the host machine stores floating point numbers in
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memory with the word containing the sign bit at the lowest address,
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or to 0 if it does it the other way around.
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This macro should not be defined if the ordering is the same as for
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multi-word integers.])
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fi
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])
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dnl Check for host float format
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gcc_AC_C_FLOAT_FORMAT
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dnl Platform specific binary postprocessor
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AC_PATH_PROG(BLESS, "true")
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if [[ "x$ac_cv_pagezero_hack" = "xyes" ]]; then
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@ -1057,6 +1198,7 @@ dnl CPU emulator sources
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if [[ "x$EMULATED_PPC" = "xyes" ]]; then
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CPUSRCS="\
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../kpx_cpu/src/mathlib/ieeefp.cpp \
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../kpx_cpu/src/mathlib/mathlib.cpp \
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../kpx_cpu/src/cpu/ppc/ppc-cpu.cpp \
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../kpx_cpu/src/cpu/ppc/ppc-decode.cpp \
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../kpx_cpu/src/cpu/ppc/ppc-execute.cpp \
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@ -410,6 +410,14 @@ 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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// High-precision timing
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#if defined(HAVE_PTHREADS) && defined(HAVE_CLOCK_NANOSLEEP) && 0
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#define PRECISE_TIMING 1
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@ -23,6 +23,7 @@
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#include <math.h>
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#include "mathlib/ieeefp.hpp"
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#include "mathlib/mathlib.hpp"
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/**
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* Define an unary/binary/trinary operation
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@ -128,25 +129,6 @@ DEFINE_ALIAS_OP(xor_64, xor, uint64);
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// Floating-point basic operations
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#ifndef HAVE_EXP2F
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#ifdef HAVE_EXP2
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#define exp2f(x) (float)exp2(x)
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#else
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#define exp2f(x) powf(2.0, (x))
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#endif
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#endif
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#ifndef HAVE_LOG2F
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#ifdef HAVE_LOG2
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#define log2f(x) (float)log2(x)
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#else
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#ifndef M_LN2
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#define M_LN2 logf(2.0)
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#endif
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#define log2f(x) logf(x) / M_LN2
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#endif
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#endif
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DEFINE_OP1(fnop, double, x);
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DEFINE_OP1(fabs, double, fabs(x));
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DEFINE_OP2(fadd, double, x + y);
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@ -180,7 +162,7 @@ DEFINE_OP1(frsqrt, float, 1 / sqrt(x));
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DEFINE_OP1(frim, float, floorf(x));
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DEFINE_OP1(frin, float, roundf(x));
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DEFINE_OP1(frip, float, ceilf(x));
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DEFINE_OP1(friz, float, trunc(x));
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DEFINE_OP1(friz, float, truncf(x));
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// Misc operations used in AltiVec instructions
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@ -1,5 +1,6 @@
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/*
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* ieeefp-i386.cpp - Access to FPU environment, x86 specific code
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* Code largely derived from GNU libc
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*
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* Kheperix (C) 2003-2005 Gwenole Beauchesne
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*
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@ -108,21 +109,3 @@ int fesetround(int round)
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return 0;
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}
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// Truncate double value
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#ifndef HAVE_TRUNC
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#define HAVE_TRUNC
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double trunc(double x)
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{
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volatile unsigned short int cw;
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volatile unsigned short int cwtmp;
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double value;
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__asm__ __volatile__("fnstcw %0" : "=m" (cw));
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cwtmp = (cw & 0xf3ff) | 0x0c00; /* toward zero */
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__asm__ __volatile__("fldcw %0" : : "m" (cwtmp));
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__asm__ __volatile__("frndint" : "=t" (value) : "0" (x));
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__asm__ __volatile__("fldcw %0" : : "m" (cw));
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return value;
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}
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#endif
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@ -55,23 +55,4 @@ enum {
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#endif
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// 7.12.14 Comparison macros
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#if defined(__GNUC__)
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#ifndef isless
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#define isless(x, y) \
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({ register char __result; \
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__asm__ ("fucompp; fnstsw; testb $0x45, %%ah; setz %%al" \
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: "=a" (__result) : "u" (x), "t" (y) : "cc", "st", "st(1)"); \
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__result; })
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#endif
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#ifndef isgreater
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#define isgreater(x, y) \
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({ register char __result; \
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__asm__ ("fucompp; fnstsw; testb $0x45, %%ah; setz %%al" \
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: "=a" (__result) : "u" (y), "t" (x) : "cc", "st", "st(1)"); \
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__result; })
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#endif
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#endif
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#endif /* IEEEFP_I386_H */
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@ -36,17 +36,4 @@ extern "C" int fesetround(int);
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#endif /* FENV_H */
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// Rounding
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#ifndef HAVE_TRUNC
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extern "C" double trunc(double);
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#endif
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// Comparison macros
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#ifndef isless
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#define isless(x, y) ((x) < (y))
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#endif
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#ifndef isgreater
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#define isgreater(x, y) ((x) > (y))
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#endif
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#endif /* IEEEFP_H */
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38
SheepShaver/src/kpx_cpu/src/mathlib/mathlib-i386.cpp
Normal file
38
SheepShaver/src/kpx_cpu/src/mathlib/mathlib-i386.cpp
Normal file
@ -0,0 +1,38 @@
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/*
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* mathlib-i386.cpp - Math library wrapper, x86 specific code
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* Code largely derived from GNU libc
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*
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* Kheperix (C) 2003-2005 Gwenole Beauchesne
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
|
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* the Free Software Foundation; either version 2 of the License, or
|
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
|
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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* GNU General Public License for more details.
|
||||
*
|
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* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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// 7.12.9.8 The trunc functions
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#ifndef HAVE_TRUNC
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#define HAVE_TRUNC
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double trunc(double x)
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{
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volatile unsigned short int cw;
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volatile unsigned short int cwtmp;
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double value;
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__asm__ __volatile__("fnstcw %0" : "=m" (cw));
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cwtmp = (cw & 0xf3ff) | 0x0c00; /* toward zero */
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__asm__ __volatile__("fldcw %0" : : "m" (cwtmp));
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__asm__ __volatile__("frndint" : "=t" (value) : "0" (x));
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__asm__ __volatile__("fldcw %0" : : "m" (cw));
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return value;
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}
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#endif
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44
SheepShaver/src/kpx_cpu/src/mathlib/mathlib-i386.hpp
Normal file
44
SheepShaver/src/kpx_cpu/src/mathlib/mathlib-i386.hpp
Normal file
@ -0,0 +1,44 @@
|
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/*
|
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* mathlib-i386.hpp - Math library wrapper, x86 specific code
|
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* Code largely derived from GNU libc
|
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*
|
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* Kheperix (C) 2003-2005 Gwenole Beauchesne
|
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*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
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|
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#ifndef MATHLIB_I386_H
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#define MATHLIB_I386_H
|
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|
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// 7.12.14 Comparison macros
|
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#if defined(__GNUC__)
|
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#ifndef isless
|
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#define isless(x, y) \
|
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({ register char __result; \
|
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__asm__ ("fucompp; fnstsw; testb $0x45, %%ah; setz %%al" \
|
||||
: "=a" (__result) : "u" (x), "t" (y) : "cc", "st", "st(1)"); \
|
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__result; })
|
||||
#endif
|
||||
|
||||
#ifndef isgreater
|
||||
#define isgreater(x, y) \
|
||||
({ register char __result; \
|
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__asm__ ("fucompp; fnstsw; testb $0x45, %%ah; setz %%al" \
|
||||
: "=a" (__result) : "u" (y), "t" (x) : "cc", "st", "st(1)"); \
|
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__result; })
|
||||
#endif
|
||||
#endif
|
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|
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#endif /* MATHLIB_I386_H */
|
||||
182
SheepShaver/src/kpx_cpu/src/mathlib/mathlib.cpp
Normal file
182
SheepShaver/src/kpx_cpu/src/mathlib/mathlib.cpp
Normal file
@ -0,0 +1,182 @@
|
||||
/*
|
||||
* mathlib.cpp - Math library wrapper
|
||||
* Code largely derived from GNU libc
|
||||
*
|
||||
* Kheperix (C) 2003-2005 Gwenole Beauchesne
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
#include "sysdeps.h"
|
||||
#include "mathlib/mathlib.hpp"
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#if defined(HOST_FLOAT_WORDS_BIG_ENDIAN) || defined(WORDS_BIGENDIAN)
|
||||
#define FLOAT_WORD_ORDER_BIG_ENDIAN
|
||||
#endif
|
||||
|
||||
|
||||
/**
|
||||
* Representation of an IEEE 754 float
|
||||
**/
|
||||
|
||||
union ieee_float_shape_type {
|
||||
float value;
|
||||
uint32 word;
|
||||
};
|
||||
|
||||
// Get a 32 bit int from a float
|
||||
#define GET_FLOAT_WORD(i,d) \
|
||||
do { \
|
||||
ieee_float_shape_type gf_u; \
|
||||
gf_u.value = (d); \
|
||||
(i) = gf_u.word; \
|
||||
} while (0)
|
||||
|
||||
|
||||
/**
|
||||
* Representation of an IEEE 754 double
|
||||
**/
|
||||
|
||||
union ieee_double_shape_type {
|
||||
double value;
|
||||
struct {
|
||||
#ifdef FLOAT_WORD_ORDER_BIG_ENDIAN
|
||||
uint32 msw;
|
||||
uint32 lsw;
|
||||
#else
|
||||
uint32 lsw;
|
||||
uint32 msw;
|
||||
#endif
|
||||
} parts;
|
||||
};
|
||||
|
||||
// Get two 32-bit ints from a double
|
||||
#define EXTRACT_WORDS(ix0,ix1,d) \
|
||||
do { \
|
||||
ieee_double_shape_type ew_u; \
|
||||
ew_u.value = (d); \
|
||||
(ix0) = ew_u.parts.msw; \
|
||||
(ix1) = ew_u.parts.lsw; \
|
||||
} while (0)
|
||||
|
||||
// Get the more significant 32 bit int from a double
|
||||
#define GET_HIGH_WORD(i,d) \
|
||||
do { \
|
||||
ieee_double_shape_type gh_u; \
|
||||
gh_u.value = (d); \
|
||||
(i) = gh_u.parts.msw; \
|
||||
} while (0)
|
||||
|
||||
// Get the less significant 32 bit int from a double
|
||||
#define GET_LOW_WORD(i,d) \
|
||||
do { \
|
||||
ieee_double_shape_type gl_u; \
|
||||
gl_u.value = (d); \
|
||||
(i) = gl_u.parts.lsw; \
|
||||
} while (0)
|
||||
|
||||
|
||||
/**
|
||||
* Arch-dependent optimizations
|
||||
**/
|
||||
|
||||
#if defined(__i386__)
|
||||
#include "mathlib/mathlib-i386.cpp"
|
||||
#endif
|
||||
|
||||
|
||||
/**
|
||||
* Helper functions
|
||||
**/
|
||||
|
||||
static void unimplemented(const char *function)
|
||||
{
|
||||
fprintf(stderr, "MATHLIB: unimplemented function '%s', aborting execution\n", function);
|
||||
abort();
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* 7.12.3.1 The fpclassify macro
|
||||
**/
|
||||
|
||||
int mathlib_fpclassifyf (float x)
|
||||
{
|
||||
uint32 wx;
|
||||
int retval = FP_NORMAL;
|
||||
|
||||
GET_FLOAT_WORD (wx, x);
|
||||
wx &= 0x7fffffff;
|
||||
if (wx == 0)
|
||||
retval = FP_ZERO;
|
||||
else if (wx < 0x800000)
|
||||
retval = FP_SUBNORMAL;
|
||||
else if (wx >= 0x7f800000)
|
||||
retval = wx > 0x7f800000 ? FP_NAN : FP_INFINITE;
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
int mathlib_fpclassify (double x)
|
||||
{
|
||||
uint32 hx, lx;
|
||||
int retval = FP_NORMAL;
|
||||
|
||||
EXTRACT_WORDS (hx, lx, x);
|
||||
lx |= hx & 0xfffff;
|
||||
hx &= 0x7ff00000;
|
||||
if ((hx | lx) == 0)
|
||||
retval = FP_ZERO;
|
||||
else if (hx == 0)
|
||||
retval = FP_SUBNORMAL;
|
||||
else if (hx == 0x7ff00000)
|
||||
retval = lx != 0 ? FP_NAN : FP_INFINITE;
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
int mathlib_fpclassifyl(long double x)
|
||||
{
|
||||
unimplemented("fpclassifyl");
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* 7.12.3.6 The signbit macro
|
||||
**/
|
||||
|
||||
int mathlib_signbitf (float x)
|
||||
{
|
||||
int32 hx;
|
||||
|
||||
GET_FLOAT_WORD (hx, x);
|
||||
return hx & 0x80000000;
|
||||
}
|
||||
|
||||
int mathlib_signbit (double x)
|
||||
{
|
||||
int32 hx;
|
||||
|
||||
GET_HIGH_WORD (hx, x);
|
||||
return hx & 0x80000000;
|
||||
}
|
||||
|
||||
int mathlib_signbitl(long double x)
|
||||
{
|
||||
unimplemented("signbitl");
|
||||
}
|
||||
162
SheepShaver/src/kpx_cpu/src/mathlib/mathlib.hpp
Normal file
162
SheepShaver/src/kpx_cpu/src/mathlib/mathlib.hpp
Normal file
@ -0,0 +1,162 @@
|
||||
/*
|
||||
* mathlib.hpp - Math library wrapper
|
||||
*
|
||||
* Kheperix (C) 2003-2005 Gwenole Beauchesne
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
*/
|
||||
|
||||
#ifndef MATHLIB_H
|
||||
#define MATHLIB_H
|
||||
|
||||
#include <math.h>
|
||||
|
||||
// 7.12 Mathematics <math.h> [#6]
|
||||
#ifndef FP_NAN
|
||||
enum {
|
||||
FP_NAN,
|
||||
# define FP_NAN FP_NAN
|
||||
FP_INFINITE,
|
||||
# define FP_INFINITE FP_INFINITE
|
||||
FP_ZERO,
|
||||
# define FP_ZERO FP_ZERO
|
||||
FP_SUBNORMAL,
|
||||
# define FP_SUBNORMAL FP_SUBNORMAL
|
||||
FP_NORMAL
|
||||
# define FP_NORMAL FP_NORMAL
|
||||
};
|
||||
#endif
|
||||
|
||||
// Arch-dependent definitions
|
||||
#if defined(__i386__)
|
||||
#include "mathlib/mathlib-i386.hpp"
|
||||
#endif
|
||||
|
||||
// 7.12.6.2 The exp2 functions
|
||||
#ifdef HAVE_EXP2F
|
||||
extern "C" float exp2f(float x);
|
||||
#else
|
||||
#ifdef HAVE_EXP2
|
||||
extern "C" double exp2(double x);
|
||||
#define exp2f(x) (float)exp2(x)
|
||||
#else
|
||||
#define exp2f(x) powf(2.0, (x))
|
||||
#endif
|
||||
#endif
|
||||
|
||||
// 7.12.6.10 The log2 functions
|
||||
#ifdef HAVE_LOG2F
|
||||
extern "C" float log2f(float x);
|
||||
#else
|
||||
#ifdef HAVE_LOG2
|
||||
extern "C" double log2(double x);
|
||||
#define log2f(x) (float)log2(x)
|
||||
#else
|
||||
#ifndef M_LN2
|
||||
#define M_LN2 logf(2.0)
|
||||
#endif
|
||||
#define log2f(x) logf(x) / M_LN2
|
||||
#endif
|
||||
#endif
|
||||
|
||||
// 7.12.9.1 The ceil functions
|
||||
#ifdef HAVE_CEILF
|
||||
extern "C" float ceilf(float x);
|
||||
#else
|
||||
#ifdef HAVE_CEIL
|
||||
extern "C" double ceil(double x);
|
||||
#define ceilf(x) (float)ceil(x)
|
||||
#endif
|
||||
#endif
|
||||
|
||||
// 7.12.9.2 The floor functions
|
||||
#ifdef HAVE_FLOORF
|
||||
extern "C" float floorf(float x);
|
||||
#else
|
||||
#ifdef HAVE_FLOOR
|
||||
extern "C" double floor(double x);
|
||||
#define floorf(x) (float)floor(x)
|
||||
#endif
|
||||
#endif
|
||||
|
||||
// 7.12.9.6 The round functions
|
||||
#ifdef HAVE_ROUNDF
|
||||
extern "C" float roundf(float x);
|
||||
#else
|
||||
#ifdef HAVE_ROUND
|
||||
extern "C" double round(double x);
|
||||
#define roundf(x) (float)round(x)
|
||||
#endif
|
||||
#endif
|
||||
|
||||
// 7.12.9.8 The trunc functions
|
||||
#ifdef HAVE_TRUNCF
|
||||
extern "C" float truncf(float x);
|
||||
#else
|
||||
#ifdef HAVE_TRUNC
|
||||
extern "C" double trunc(double x);
|
||||
#define truncf(x) (float)trunc(x)
|
||||
#endif
|
||||
#endif
|
||||
|
||||
// 7.12.3.1 The fpclassify macro
|
||||
#ifndef fpclassify
|
||||
#ifndef mathlib_fpclassifyf
|
||||
extern int mathlib_fpclassifyf(float x);
|
||||
#endif
|
||||
#ifndef mathlib_fpclassify
|
||||
extern int mathlib_fpclassify(double x);
|
||||
#endif
|
||||
#ifndef mathlib_fpclassifyl
|
||||
extern int mathlib_fpclassifyl(long double x);
|
||||
#endif
|
||||
#define fpclassify(x) \
|
||||
(sizeof (x) == sizeof (float) \
|
||||
? mathlib_fpclassifyf (x) \
|
||||
: sizeof (x) == sizeof (double) \
|
||||
? mathlib_fpclassify (x) : mathlib_fpclassifyl (x))
|
||||
#endif
|
||||
|
||||
// 7.12.3.6 The signbit macro
|
||||
#ifndef signbit
|
||||
#ifndef mathlib_signbitf
|
||||
extern int mathlib_signbitf(float x);
|
||||
#endif
|
||||
#ifndef mathlib_signbit
|
||||
extern int mathlib_signbit(double x);
|
||||
#endif
|
||||
#ifndef mathlib_signbitl
|
||||
extern int mathlib_signbitl(long double x);
|
||||
#endif
|
||||
#define signbit(x) \
|
||||
(sizeof (x) == sizeof (float) \
|
||||
? mathlib_signbitf (x) \
|
||||
: sizeof (x) == sizeof (double) \
|
||||
? mathlib_signbit (x) : mathlib_signbitl (x))
|
||||
#endif
|
||||
|
||||
// 7.12.14.1 The isgreater macro
|
||||
// FIXME: this is wrong for unordered values
|
||||
#ifndef isgreater
|
||||
#define isgreater(x, y) ((x) > (y))
|
||||
#endif
|
||||
|
||||
// 7.12.14.3 The isless macro
|
||||
// FIXME: this is wrong for unordered values
|
||||
#ifndef isless
|
||||
#define isless(x, y) ((x) < (y))
|
||||
#endif
|
||||
|
||||
#endif /* MATHLIB_H */
|
||||
Loading…
x
Reference in New Issue
Block a user