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2007-03-24  Uros Bizjak  <ubizjak@gmail.com>
	
	* testsuite/libffi.call/return_fl2.c (return_fl): Mark as static.
	Use 'volatile float sum' to create sum of floats to avoid false
	negative due to excess precision on ix86 targets.
	(main): Ditto.

From-SVN: r132686
This commit is contained in:
Kaveh R. Ghazi
2008-02-26 21:54:30 +00:00
committed by Kaveh Ghazi
parent 015a76860f
commit a9782409fd
2 changed files with 20 additions and 6 deletions
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10
libffi/ChangeLog
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@@ -1,3 +1,13 @@
2008-02-26 Kaveh R. Ghazi <ghazi@caip.rutgers.edu>
Backport:
2007-03-24 Uros Bizjak <ubizjak@gmail.com>
* testsuite/libffi.call/return_fl2.c (return_fl): Mark as static.
Use 'volatile float sum' to create sum of floats to avoid false
negative due to excess precision on ix86 targets.
(main): Ditto.
2008-02-01 Release Manager
* GCC 4.2.3 released.

16
libffi/testsuite/libffi.call/return_fl2.c
View File

@@ -7,12 +7,13 @@
/* { dg-do run } */
#include "ffitest.h"
/* To avoid a false negative on ix86 do not declare the return_fl static.
See PR323.
*/
float return_fl(float fl1, float fl2, float fl3, float fl4)
/* Use volatile float to avoid false negative on ix86. See PR target/323. */
static float return_fl(float fl1, float fl2, float fl3, float fl4)
{
return fl1 + fl2 + fl3 + fl4;
volatile float sum;
sum = fl1 + fl2 + fl3 + fl4;
return sum;
}
int main (void)
{
@@ -20,6 +21,7 @@ int main (void)
ffi_type *args[MAX_ARGS];
void *values[MAX_ARGS];
float fl1, fl2, fl3, fl4, rfl;
volatile float sum;
args[0] = &ffi_type_float;
args[1] = &ffi_type_float;
@@ -40,6 +42,8 @@ int main (void)
ffi_call(&cif, FFI_FN(return_fl), &rfl, values);
printf ("%f vs %f\n", rfl, return_fl(fl1, fl2, fl3, fl4));
CHECK(rfl == fl1 + fl2 + fl3 + fl4);
sum = fl1 + fl2 + fl3 + fl4;
CHECK(rfl == sum);
exit(0);
}