Module: ppl/ppl Branch: master Commit: 07f8c154d6e0bef0e99284e1597c327beddf6b45 URL: http://www.cs.unipr.it/git/gitweb.cgi?p=ppl/ppl.git;a=commit;h=07f8c154d6e0b...

Author: Roberto Bagnara bagnara@cs.unipr.it Date: Mon Feb 21 09:56:13 2011 +0100

The `--disable-fpmath' configure option now disables all floating point computations.

---

NEWS | 13 +++++++++++++ README.configure | 5 ++++- configure.ac | 30 ++++++++++++++++++++---------- m4/ac_check_fpu_control.m4 | 3 --- 4 files changed, 37 insertions(+), 14 deletions(-)

diff --git a/NEWS b/NEWS index 8979ab9..2db6ec8 100644 --- a/NEWS +++ b/NEWS @@ -36,6 +36,19 @@ o The input routine for PPL numeric datatypes has been extended to

-------------------------------------------------------------------------- +NEWS for version 0.11.2 (released date to be decided) +-------------------------------------------------------------------------- + +Bugfixes +======== + +o Fixed the semantics of the `--disable-fpmath' configure option + (which is equivalent to `--enable-fpmath=no'). It now disables all + floating point computations and, consequently, all numerical + abstractions based on floating point numbers. + + +-------------------------------------------------------------------------- NEWS for version 0.11.1 (released on February 20, 2011) --------------------------------------------------------------------------

diff --git a/README.configure b/README.configure index 7f87184..d25ac3f 100644 --- a/README.configure +++ b/README.configure @@ -357,7 +357,10 @@ For floating point computations, the option

allows for selecting, on the IA32 and x86_64, the floating point instruction set. The allowed values for INSTRUCTION_SET are `sse', `sse2', `387, -`sse+387', and `sse2+387'. +`sse+387', and `sse2+387', `default', and `no'. The latter option, which +is equivalent to specifying `--disable-fpmath', has the effect of disabling +all floating point computation and, consequently, all the numerical +abstractions based on floating point numbers.

On the other hand, there are configure options to request lesser degrees of optimization for the sake of debugging. These are, diff --git a/configure.ac b/configure.ac index 6fd60e8..117e8b1 100644 --- a/configure.ac +++ b/configure.ac @@ -378,23 +378,24 @@ no) esac

enableval=default +use_fpmath=yes fpmath_may_use_387=yes fpmath_may_use_sse=yes -AC_MSG_CHECKING([whether to select specific floating point arithmetics]) +AC_MSG_CHECKING([whether to use (a specific) floating point arithmetic]) AC_ARG_ENABLE(fpmath, AS_HELP_STRING([--enable-fpmath=INSTRUCTION_SET], - [select floating point arithmetics])) + [select floating point arithmetic])) case "${enableval}" in sse) AC_MSG_RESULT(sse) OPT_FLAGS="$OPT_FLAGS -msse -mfpmath=sse" - # The SSE instruction set only supports single precision arithmetics: - # double and extended precision arithmetics is still done using 387. + # The SSE instruction set only supports single precision arithmetic: + # double and extended precision arithmetic is still done using 387. ;; sse2) AC_MSG_RESULT(sse2) OPT_FLAGS="$OPT_FLAGS -msse2 -mfpmath=sse" - # SSE2 still does not support extended precision arithmetics. + # SSE2 still does not support extended precision arithmetic. ;; 387) AC_MSG_RESULT(387) @@ -418,7 +419,8 @@ default) AC_MSG_RESULT(default) ;; no) - AC_MSG_RESULT(default) + AC_MSG_RESULT(no) + use_fpmath=no ;; *) AC_MSG_ERROR([bad value ${enableval} for --enable-fpmath, needs sse, sse2, 387, sse+387, sse2+387, default or no]) @@ -427,12 +429,12 @@ esac

if test x"$fpmath_may_use_387" = xyes then - AC_DEFINE(PPL_FPMATH_MAY_USE_387, 1, [Defined if floating point arithmetics may use the 387 unit.]) + AC_DEFINE(PPL_FPMATH_MAY_USE_387, 1, [Defined if floating point arithmetic may use the 387 unit.]) fi

if test x"$fpmath_may_use_sse" = xyes then - AC_DEFINE(PPL_FPMATH_MAY_USE_SSE, 1, [Defined if floating point arithmetics may use the SSE instruction set.]) + AC_DEFINE(PPL_FPMATH_MAY_USE_SSE, 1, [Defined if floating point arithmetic may use the SSE instruction set.]) fi

# Disable all transformations and optimizations that assume default @@ -663,8 +665,16 @@ AC_LANG(C++) # The PPL uses <cmath> for sqrt and other functions in several places. AC_SEARCH_LIBS([sqrt], [m])

-# Check for the possibility to control the FPU. -AC_CHECK_FPU_CONTROL +if test x"$use_fpmath" = xyes +then + # Check for the possibility to control the FPU. + AC_CHECK_FPU_CONTROL +else + ac_cv_can_control_fpu=0 +fi +AM_CONDITIONAL(CAN_CONTROL_FPU, test $ac_cv_can_control_fpu = 1) +AC_DEFINE_UNQUOTED(PPL_CAN_CONTROL_FPU, $ac_cv_can_control_fpu, + [Not zero if the FPU can be controlled.])

# Check whether for the C++ compiler the plain char type is signed. AC_CXX_PLAIN_CHAR_IS_SIGNED diff --git a/m4/ac_check_fpu_control.m4 b/m4/ac_check_fpu_control.m4 index e285f77..cac3a32 100644 --- a/m4/ac_check_fpu_control.m4 +++ b/m4/ac_check_fpu_control.m4 @@ -141,8 +141,5 @@ main() { ac_cv_can_control_fpu=0 ) ) -AM_CONDITIONAL(CAN_CONTROL_FPU, test $ac_cv_can_control_fpu = 1) -AC_DEFINE_UNQUOTED(PPL_CAN_CONTROL_FPU, $ac_cv_can_control_fpu, - [Not zero if the FPU can be controlled.]) AC_LANG_POP(C++) ])