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- Fixed autoconf 2.13 issues with FP checks.

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This commit is contained in:
Christian Seiler 2008-12-02 21:06:33 +00:00
parent fbf7cc72aa
commit 8ac82de068
1 changed files with 69 additions and 124 deletions
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193
Zend/acinclude.m4
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@ -110,31 +110,20 @@ dnl x87 floating point internal precision control checks
dnl See: http://wiki.php.net/rfc/rounding
AC_DEFUN([ZEND_CHECK_FLOAT_PRECISION],[
AC_MSG_CHECKING([for usable _FPU_SETCW])
AC_LINK_IFELSE([[
#include <stdio.h>
#include <string.h>
#include <fpu_control.h>
double div (double a, double b) {
fpu_control_t fpu_oldcw, fpu_cw;
volatile double result;
_FPU_GETCW(fpu_oldcw);
fpu_cw = (fpu_oldcw & ~_FPU_EXTENDED & ~_FPU_SINGLE) | _FPU_DOUBLE;
_FPU_SETCW(fpu_cw);
result = a / b;
_FPU_SETCW(fpu_oldcw);
return result;
}
int main (int argc, char **argv) {
double d = div (2877.0, 1000000.0);
char buf[255];
sprintf(buf, "%.30f", d);
/* see if the result is actually in double precision */
return strncmp(buf, "0.00287699", 10) == 0 ? 0 : 1;
}
]], [ac_cfp_have__fpu_setcw=yes], [ac_cfp_have__fpu_setcw=no])
AC_TRY_LINK([
#include <fpu_control.h>
],[
fpu_control_t fpu_oldcw, fpu_cw;
volatile double result;
double a = 2877.0;
volatile double b = 1000000.0;
_FPU_GETCW(fpu_oldcw);
fpu_cw = (fpu_oldcw & ~_FPU_EXTENDED & ~_FPU_SINGLE) | _FPU_DOUBLE;
_FPU_SETCW(fpu_cw);
result = a / b;
_FPU_SETCW(fpu_oldcw);
], [ac_cfp_have__fpu_setcw=yes], [ac_cfp_have__fpu_setcw=no])
if test "$ac_cfp_have__fpu_setcw" = "yes" ; then
AC_DEFINE(HAVE__FPU_SETCW, 1, [whether _FPU_SETCW is present and usable])
AC_MSG_RESULT(yes)
@ -143,30 +132,19 @@ AC_DEFUN([ZEND_CHECK_FLOAT_PRECISION],[
fi
AC_MSG_CHECKING([for usable fpsetprec])
AC_LINK_IFELSE([[
#include <stdio.h>
#include <string.h>
#include <machine/ieeefp.h>
double div (double a, double b) {
fp_prec_t fpu_oldprec;
volatile double result;
fpu_oldprec = fpgetprec();
fpsetprec(FP_PD);
result = a / b;
fpsetprec(fpu_oldprec);
return result;
}
int main (int argc, char **argv) {
double d = div (2877.0, 1000000.0);
char buf[255];
sprintf(buf, "%.30f", d);
/* see if the result is actually in double precision */
return strncmp(buf, "0.00287699", 10) == 0 ? 0 : 1;
}
]], [ac_cfp_have_fpsetprec=yes], [ac_cfp_have_fpsetprec=no])
AC_TRY_LINK([
#include <machine/ieeefp.h>
],[
fp_prec_t fpu_oldprec;
volatile double result;
double a = 2877.0;
volatile double b = 1000000.0;
fpu_oldprec = fpgetprec();
fpsetprec(FP_PD);
result = a / b;
fpsetprec(fpu_oldprec);
], [ac_cfp_have_fpsetprec=yes], [ac_cfp_have_fpsetprec=no])
if test "$ac_cfp_have_fpsetprec" = "yes" ; then
AC_DEFINE(HAVE_FPSETPREC, 1, [whether fpsetprec is present and usable])
AC_MSG_RESULT(yes)
@ -175,30 +153,19 @@ AC_DEFUN([ZEND_CHECK_FLOAT_PRECISION],[
fi
AC_MSG_CHECKING([for usable _controlfp])
AC_LINK_IFELSE([[
#include <stdio.h>
#include <string.h>
#include <float.h>
double div (double a, double b) {
unsigned int fpu_oldcw;
volatile double result;
fpu_oldcw = _controlfp(0, 0);
_controlfp(_PC_53, _MCW_PC);
result = a / b;
_controlfp(fpu_oldcw, _MCW_PC);
return result;
}
int main (int argc, char **argv) {
double d = div (2877.0, 1000000.0);
char buf[255];
sprintf(buf, "%.30f", d);
/* see if the result is actually in double precision */
return strncmp(buf, "0.00287699", 10) == 0 ? 0 : 1;
}
]], [ac_cfp_have__controlfp=yes], [ac_cfp_have__controlfp=no])
AC_TRY_LINK([
#include <float.h>
],[
unsigned int fpu_oldcw;
volatile double result;
double a = 2877.0;
volatile double b = 1000000.0;
fpu_oldcw = _controlfp(0, 0);
_controlfp(_PC_53, _MCW_PC);
result = a / b;
_controlfp(fpu_oldcw, _MCW_PC);
], [ac_cfp_have__controlfp=yes], [ac_cfp_have__controlfp=no])
if test "$ac_cfp_have__controlfp" = "yes" ; then
AC_DEFINE(HAVE__CONTROLFP, 1, [whether _controlfp is present usable])
AC_MSG_RESULT(yes)
@ -207,31 +174,20 @@ AC_DEFUN([ZEND_CHECK_FLOAT_PRECISION],[
fi
AC_MSG_CHECKING([for usable _controlfp_s])
AC_LINK_IFELSE([[
#include <stdio.h>
#include <string.h>
AC_TRY_LINK([
#include <float.h>
double div (double a, double b) {
unsigned int fpu_oldcw, fpu_cw;
volatile double result;
_controlfp_s(&fpu_cw, 0, 0);
fpu_oldcw = fpu_cw;
_controlfp_s(&fpu_cw, _PC_53, _MCW_PC);
result = a / b;
_controlfp_s(&fpu_cw, fpu_oldcw, _MCW_PC);
return result;
}
int main (int argc, char **argv) {
double d = div (2877.0, 1000000.0);
char buf[255];
sprintf(buf, "%.30f", d);
/* see if the result is actually in double precision */
return strncmp(buf, "0.00287699", 10) == 0 ? 0 : 1;
}
]], [ac_cfp_have__controlfp_s=yes], [ac_cfp_have__controlfp_s=no])
],[
unsigned int fpu_oldcw, fpu_cw;
volatile double result;
double a = 2877.0;
volatile double b = 1000000.0;
_controlfp_s(&fpu_cw, 0, 0);
fpu_oldcw = fpu_cw;
_controlfp_s(&fpu_cw, _PC_53, _MCW_PC);
result = a / b;
_controlfp_s(&fpu_cw, fpu_oldcw, _MCW_PC);
], [ac_cfp_have__controlfp_s=yes], [ac_cfp_have__controlfp_s=no])
if test "$ac_cfp_have__controlfp_s" = "yes" ; then
AC_DEFINE(HAVE__CONTROLFP_S, 1, [whether _controlfp_s is present and usable])
AC_MSG_RESULT(yes)
@ -240,33 +196,22 @@ AC_DEFUN([ZEND_CHECK_FLOAT_PRECISION],[
fi
AC_MSG_CHECKING([whether FPU control word can be manipulated by inline assembler])
AC_LINK_IFELSE([[
#include <stdio.h>
#include <string.h>
double div (double a, double b) {
unsigned int oldcw, cw;
volatile double result;
__asm__ __volatile__ ("fnstcw %0" : "=m" (*&oldcw));
cw = (oldcw & ~0x0 & ~0x300) | 0x200;
__asm__ __volatile__ ("fldcw %0" : : "m" (*&cw));
result = a / b;
__asm__ __volatile__ ("fldcw %0" : : "m" (*&oldcw));
return result;
}
int main (int argc, char **argv) {
double d = div (2877.0, 1000000.0);
char buf[255];
sprintf(buf, "%.30f", d);
/* see if the result is actually in double precision */
return strncmp(buf, "0.00287699", 10) == 0 ? 0 : 1;
}
]], [ac_cfp_have_fpu_inline_asm_x86=yes], [ac_cfp_have_fpu_inline_asm_x86=no])
AC_TRY_LINK([
/* nothing */
],[
unsigned int oldcw, cw;
volatile double result;
double a = 2877.0;
volatile double b = 1000000.0;
__asm__ __volatile__ ("fnstcw %0" : "=m" (*&oldcw));
cw = (oldcw & ~0x0 & ~0x300) | 0x200;
__asm__ __volatile__ ("fldcw %0" : : "m" (*&cw));
result = a / b;
__asm__ __volatile__ ("fldcw %0" : : "m" (*&oldcw));
], [ac_cfp_have_fpu_inline_asm_x86=yes], [ac_cfp_have_fpu_inline_asm_x86=no])
if test "$ac_cfp_have_fpu_inline_asm_x86" = "yes" ; then
AC_DEFINE(HAVE_FPU_INLINE_ASM_X86, 1, [whether FPU control word can be manipulated by inline assembler])
AC_MSG_RESULT(yes)