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re PR fortran/58113 (gfortran.dg/round_4.f90 FAILs) 

2013-09-26  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR fortran/58113
        * gfortran.dg/round_4.f90: Check for rounding support.

From-SVN: r202954
This commit is contained in:
Bernd Edlinger 2013-09-26 17:44:13 +00:00 committed by Bernd Edlinger
parent 84f48495e9
commit 13b670acd3
2 changed files with 45 additions and 23 deletions
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5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2013-09-26 Bernd Edlinger <bernd.edlinger@hotmail.de>
PR fortran/58113
* gfortran.dg/round_4.f90: Check for rounding support.
2013-09-26 James Greenhalgh <james.greenhalgh@arm.com>
* g++.dg/vect/pr58513.cc (op): Make static.

63
gcc/testsuite/gfortran.dg/round_4.f90
View File

@ -6,12 +6,18 @@
! Test whether I/O rounding works. Uses internally (libgfortran) strtod
! for the conversion - and sets the CPU rounding mode accordingly.
!
! Only few strtod implementations currently support rounding. Therefore
! we use a heuristic to determine if the rounding support is available.
! The assumption is that if strtod gives *different* results for up/down
! rounding, then it will give *correct* results for nearest/zero/up/down
! rounding too. And that is what is effectively checked.
!
! If it doesn't work on your system, please check whether strtod handles
! rounding and whether your system is supported in libgfortran/config/fpu*.c
! rounding correctly and whether your system is supported in
! libgfortran/config/fpu*.c
!
! Please only add ... run { target { ! { triplets } } } if it is unfixable
! on your target - and a note why (strtod doesn't handle it, no rounding
! support, etc.)
! on your target - and a note why (strtod has broken rounding support, etc.)
!
program main
use iso_fortran_env
@ -27,6 +33,17 @@ program main
real(xp) :: r10p, r10m, ref10u, ref10d
real(qp) :: r16p, r16m, ref16u, ref16d
character(len=20) :: str, round
logical :: rnd4, rnd8, rnd10, rnd16
! Test for which types glibc's strtod function supports rounding
str = '0.01 0.01 0.01 0.01'
read (str, *, round='up') r4p, r8p, r10p, r16p
read (str, *, round='down') r4m, r8m, r10m, r16m
rnd4 = r4p /= r4m
rnd8 = r8p /= r8m
rnd10 = r10p /= r10m
rnd16 = r16p /= r16m
! write (*, *) rnd4, rnd8, rnd10, rnd16
ref4u = 0.100000001_4
ref8u = 0.10000000000000001_8
@ -55,40 +72,40 @@ program main
round = 'up'
call t()
if (r4p /= ref4u .or. r4m /= -ref4d) call abort()
if (r8p /= ref8u .or. r8m /= -ref8d) call abort()
if (r10p /= ref10u .or. r10m /= -ref10d) call abort()
if (r16p /= ref16u .or. r16m /= -ref16d) call abort()
if (rnd4 .and. (r4p /= ref4u .or. r4m /= -ref4d)) call abort()
if (rnd8 .and. (r8p /= ref8u .or. r8m /= -ref8d)) call abort()
if (rnd10 .and. (r10p /= ref10u .or. r10m /= -ref10d)) call abort()
if (rnd16 .and. (r16p /= ref16u .or. r16m /= -ref16d)) call abort()
round = 'down'
call t()
if (r4p /= ref4d .or. r4m /= -ref4u) call abort()
if (r8p /= ref8d .or. r8m /= -ref8u) call abort()
if (r10p /= ref10d .or. r10m /= -ref10u) call abort()
if (r16p /= ref16d .or. r16m /= -ref16u) call abort()
if (rnd4 .and. (r4p /= ref4d .or. r4m /= -ref4u)) call abort()
if (rnd8 .and. (r8p /= ref8d .or. r8m /= -ref8u)) call abort()
if (rnd10 .and. (r10p /= ref10d .or. r10m /= -ref10u)) call abort()
if (rnd16 .and. (r16p /= ref16d .or. r16m /= -ref16u)) call abort()
round = 'zero'
call t()
if (r4p /= ref4d .or. r4m /= -ref4d) call abort()
if (r8p /= ref8d .or. r8m /= -ref8d) call abort()
if (r10p /= ref10d .or. r10m /= -ref10d) call abort()
if (r16p /= ref16d .or. r16m /= -ref16d) call abort()
if (rnd4 .and. (r4p /= ref4d .or. r4m /= -ref4d)) call abort()
if (rnd8 .and. (r8p /= ref8d .or. r8m /= -ref8d)) call abort()
if (rnd10 .and. (r10p /= ref10d .or. r10m /= -ref10d)) call abort()
if (rnd16 .and. (r16p /= ref16d .or. r16m /= -ref16d)) call abort()
round = 'nearest'
call t()
if (r4p /= ref4u .or. r4m /= -ref4u) call abort()
if (r8p /= ref8u .or. r8m /= -ref8u) call abort()
if (r10p /= ref10u .or. r10m /= -ref10u) call abort()
if (r16p /= ref16u .or. r16m /= -ref16u) call abort()
if (rnd4 .and. (r4p /= ref4u .or. r4m /= -ref4u)) call abort()
if (rnd8 .and. (r8p /= ref8u .or. r8m /= -ref8u)) call abort()
if (rnd10 .and. (r10p /= ref10u .or. r10m /= -ref10u)) call abort()
if (rnd16 .and. (r16p /= ref16u .or. r16m /= -ref16u)) call abort()
! Same as nearest (but rounding towards zero if there is a tie
! [does not apply here])
round = 'compatible'
call t()
if (r4p /= ref4u .or. r4m /= -ref4u) call abort()
if (r8p /= ref8u .or. r8m /= -ref8u) call abort()
if (r10p /= ref10u .or. r10m /= -ref10u) call abort()
if (r16p /= ref16u .or. r16m /= -ref16u) call abort()
if (rnd4 .and. (r4p /= ref4u .or. r4m /= -ref4u)) call abort()
if (rnd8 .and. (r8p /= ref8u .or. r8m /= -ref8u)) call abort()
if (rnd10 .and. (r10p /= ref10u .or. r10m /= -ref10u)) call abort()
if (rnd16 .and. (r16p /= ref16u .or. r16m /= -ref16u)) call abort()
contains
subroutine t()
! print *, round