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PowerPC floating point little-endian [8 of 15]

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http://sourceware.org/ml/libc-alpha/2013-07/msg00199.html

Corrects floating-point environment code for little-endian.

	* sysdeps/powerpc/fpu/fenv_libc.h (fenv_union_t): Replace int
	array with long long.
	* sysdeps/powerpc/fpu/e_sqrt.c (__slow_ieee754_sqrt): Adjust.
	* sysdeps/powerpc/fpu/e_sqrtf.c (__slow_ieee754_sqrtf): Adjust.
	* sysdeps/powerpc/fpu/fclrexcpt.c (__feclearexcept): Adjust.
	* sysdeps/powerpc/fpu/fedisblxcpt.c (fedisableexcept): Adjust.
	* sysdeps/powerpc/fpu/feenablxcpt.c (feenableexcept): Adjust.
	* sysdeps/powerpc/fpu/fegetexcept.c (__fegetexcept): Adjust.
	* sysdeps/powerpc/fpu/feholdexcpt.c (feholdexcept): Adjust.
	* sysdeps/powerpc/fpu/fesetenv.c (__fesetenv): Adjust.
	* sysdeps/powerpc/fpu/feupdateenv.c (__feupdateenv): Adjust.
	* sysdeps/powerpc/fpu/fgetexcptflg.c (__fegetexceptflag): Adjust.
	* sysdeps/powerpc/fpu/fraiseexcpt.c (__feraiseexcept): Adjust.
	* sysdeps/powerpc/fpu/fsetexcptflg.c (__fesetexceptflag): Adjust.
	* sysdeps/powerpc/fpu/ftestexcept.c (fetestexcept): Adjust.
This commit is contained in:
Anton Blanchard 2013-08-17 18:28:55 +09:30 committed by Alan Modra
parent 2ca85d2bbb
commit 4a28b3ca4b
15 changed files with 57 additions and 40 deletions
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18
ChangeLog
View File

@ -1,3 +1,21 @@
2013-10-04 Anton Blanchard <anton@au1.ibm.com>
* sysdeps/powerpc/fpu/fenv_libc.h (fenv_union_t): Replace int
array with long long.
* sysdeps/powerpc/fpu/e_sqrt.c (__slow_ieee754_sqrt): Adjust.
* sysdeps/powerpc/fpu/e_sqrtf.c (__slow_ieee754_sqrtf): Adjust.
* sysdeps/powerpc/fpu/fclrexcpt.c (__feclearexcept): Adjust.
* sysdeps/powerpc/fpu/fedisblxcpt.c (fedisableexcept): Adjust.
* sysdeps/powerpc/fpu/feenablxcpt.c (feenableexcept): Adjust.
* sysdeps/powerpc/fpu/fegetexcept.c (__fegetexcept): Adjust.
* sysdeps/powerpc/fpu/feholdexcpt.c (feholdexcept): Adjust.
* sysdeps/powerpc/fpu/fesetenv.c (__fesetenv): Adjust.
* sysdeps/powerpc/fpu/feupdateenv.c (__feupdateenv): Adjust.
* sysdeps/powerpc/fpu/fgetexcptflg.c (__fegetexceptflag): Adjust.
* sysdeps/powerpc/fpu/fraiseexcpt.c (__feraiseexcept): Adjust.
* sysdeps/powerpc/fpu/fsetexcptflg.c (__fesetexceptflag): Adjust.
* sysdeps/powerpc/fpu/ftestexcept.c (fetestexcept): Adjust.
2013-10-04 Anton Blanchard <anton@au1.ibm.com>
* sysdeps/powerpc/bits/mathinline.h (__signbitf): Use builtin.

2
sysdeps/powerpc/fpu/e_sqrt.c
View File

@ -145,7 +145,7 @@ __slow_ieee754_sqrt (double x)
feraiseexcept (FE_INVALID_SQRT);
fenv_union_t u = { .fenv = fegetenv_register () };
if ((u.l[1] & FE_INVALID) == 0)
if ((u.l & FE_INVALID) == 0)
#endif
feraiseexcept (FE_INVALID);
x = a_nan.value;

2
sysdeps/powerpc/fpu/e_sqrtf.c
View File

@ -121,7 +121,7 @@ __slow_ieee754_sqrtf (float x)
feraiseexcept (FE_INVALID_SQRT);
fenv_union_t u = { .fenv = fegetenv_register () };
if ((u.l[1] & FE_INVALID) == 0)
if ((u.l & FE_INVALID) == 0)
#endif
feraiseexcept (FE_INVALID);
x = a_nan.value;

4
sysdeps/powerpc/fpu/fclrexcpt.c
View File

@ -28,8 +28,8 @@ __feclearexcept (int excepts)
u.fenv = fegetenv_register ();
/* Clear the relevant bits. */
u.l[1] = u.l[1] & ~((-(excepts >> (31 - FPSCR_VX) & 1) & FE_ALL_INVALID)
| (excepts & FPSCR_STICKY_BITS));
u.l = u.l & ~((-(excepts >> (31 - FPSCR_VX) & 1) & FE_ALL_INVALID)
| (excepts & FPSCR_STICKY_BITS));
/* Put the new state in effect. */
fesetenv_register (u.fenv);

10
sysdeps/powerpc/fpu/fedisblxcpt.c
View File

@ -32,15 +32,15 @@ fedisableexcept (int excepts)
fe.fenv = fegetenv_register ();
if (excepts & FE_INEXACT)
fe.l[1] &= ~(1 << (31 - FPSCR_XE));
fe.l &= ~(1 << (31 - FPSCR_XE));
if (excepts & FE_DIVBYZERO)
fe.l[1] &= ~(1 << (31 - FPSCR_ZE));
fe.l &= ~(1 << (31 - FPSCR_ZE));
if (excepts & FE_UNDERFLOW)
fe.l[1] &= ~(1 << (31 - FPSCR_UE));
fe.l &= ~(1 << (31 - FPSCR_UE));
if (excepts & FE_OVERFLOW)
fe.l[1] &= ~(1 << (31 - FPSCR_OE));
fe.l &= ~(1 << (31 - FPSCR_OE));
if (excepts & FE_INVALID)
fe.l[1] &= ~(1 << (31 - FPSCR_VE));
fe.l &= ~(1 << (31 - FPSCR_VE));
fesetenv_register (fe.fenv);
new = __fegetexcept ();

10
sysdeps/powerpc/fpu/feenablxcpt.c
View File

@ -32,15 +32,15 @@ feenableexcept (int excepts)
fe.fenv = fegetenv_register ();
if (excepts & FE_INEXACT)
fe.l[1] |= (1 << (31 - FPSCR_XE));
fe.l |= (1 << (31 - FPSCR_XE));
if (excepts & FE_DIVBYZERO)
fe.l[1] |= (1 << (31 - FPSCR_ZE));
fe.l |= (1 << (31 - FPSCR_ZE));
if (excepts & FE_UNDERFLOW)
fe.l[1] |= (1 << (31 - FPSCR_UE));
fe.l |= (1 << (31 - FPSCR_UE));
if (excepts & FE_OVERFLOW)
fe.l[1] |= (1 << (31 - FPSCR_OE));
fe.l |= (1 << (31 - FPSCR_OE));
if (excepts & FE_INVALID)
fe.l[1] |= (1 << (31 - FPSCR_VE));
fe.l |= (1 << (31 - FPSCR_VE));
fesetenv_register (fe.fenv);
new = __fegetexcept ();

10
sysdeps/powerpc/fpu/fegetexcept.c
View File

@ -27,15 +27,15 @@ __fegetexcept (void)
fe.fenv = fegetenv_register ();
if (fe.l[1] & (1 << (31 - FPSCR_XE)))
if (fe.l & (1 << (31 - FPSCR_XE)))
result |= FE_INEXACT;
if (fe.l[1] & (1 << (31 - FPSCR_ZE)))
if (fe.l & (1 << (31 - FPSCR_ZE)))
result |= FE_DIVBYZERO;
if (fe.l[1] & (1 << (31 - FPSCR_UE)))
if (fe.l & (1 << (31 - FPSCR_UE)))
result |= FE_UNDERFLOW;
if (fe.l[1] & (1 << (31 - FPSCR_OE)))
if (fe.l & (1 << (31 - FPSCR_OE)))
result |= FE_OVERFLOW;
if (fe.l[1] & (1 << (31 - FPSCR_VE)))
if (fe.l & (1 << (31 - FPSCR_VE)))
result |= FE_INVALID;
return result;

5
sysdeps/powerpc/fpu/feholdexcpt.c
View File

@ -30,13 +30,12 @@ feholdexcept (fenv_t *envp)
/* Clear everything except for the rounding modes and non-IEEE arithmetic
flag. */
new.l[1] = old.l[1] & 7;
new.l[0] = old.l[0];
new.l = old.l & 0xffffffff00000007LL;
/* If the old env had any enabled exceptions, then mask SIGFPE in the
MSR FE0/FE1 bits. This may allow the FPU to run faster because it
always takes the default action and can not generate SIGFPE. */
if ((old.l[1] & _FPU_MASK_ALL) != 0)
if ((old.l & _FPU_MASK_ALL) != 0)
(void)__fe_mask_env ();
/* Put the new state in effect. */

2
sysdeps/powerpc/fpu/fenv_libc.h
View File

@ -69,7 +69,7 @@ libm_hidden_proto (__fe_nomask_env)
typedef union
{
fenv_t fenv;
unsigned int l[2];
unsigned long long l;
} fenv_union_t;

4
sysdeps/powerpc/fpu/fesetenv.c
View File

@ -34,14 +34,14 @@ __fesetenv (const fenv_t *envp)
exceptions, then unmask SIGFPE in the MSR FE0/FE1 bits. This will put the
hardware into "precise mode" and may cause the FPU to run slower on some
hardware. */
if ((old.l[1] & _FPU_MASK_ALL) == 0 && (new.l[1] & _FPU_MASK_ALL) != 0)
if ((old.l & _FPU_MASK_ALL) == 0 && (new.l & _FPU_MASK_ALL) != 0)
(void)__fe_nomask_env ();
/* If the old env had any enabled exceptions and the new env has no enabled
exceptions, then mask SIGFPE in the MSR FE0/FE1 bits. This may allow the
FPU to run faster because it always takes the default action and can not
generate SIGFPE. */
if ((old.l[1] & _FPU_MASK_ALL) != 0 && (new.l[1] & _FPU_MASK_ALL) == 0)
if ((old.l & _FPU_MASK_ALL) != 0 && (new.l & _FPU_MASK_ALL) == 0)
(void)__fe_mask_env ();
fesetenv_register (*envp);

6
sysdeps/powerpc/fpu/feupdateenv.c
View File

@ -34,20 +34,20 @@ __feupdateenv (const fenv_t *envp)
/* Restore rounding mode and exception enable from *envp and merge
exceptions. Leave fraction rounded/inexact and FP result/CC bits
unchanged. */
new.l[1] = (old.l[1] & 0x1FFFFF00) | (new.l[1] & 0x1FF80FFF);
new.l = (old.l & 0xffffffff1fffff00LL) | (new.l & 0x1ff80fff);
/* If the old env has no enabled exceptions and the new env has any enabled
exceptions, then unmask SIGFPE in the MSR FE0/FE1 bits. This will put
the hardware into "precise mode" and may cause the FPU to run slower on
some hardware. */
if ((old.l[1] & _FPU_MASK_ALL) == 0 && (new.l[1] & _FPU_MASK_ALL) != 0)
if ((old.l & _FPU_MASK_ALL) == 0 && (new.l & _FPU_MASK_ALL) != 0)
(void)__fe_nomask_env ();
/* If the old env had any enabled exceptions and the new env has no enabled
exceptions, then mask SIGFPE in the MSR FE0/FE1 bits. This may allow the
FPU to run faster because it always takes the default action and can not
generate SIGFPE. */
if ((old.l[1] & _FPU_MASK_ALL) != 0 && (new.l[1] & _FPU_MASK_ALL) == 0)
if ((old.l & _FPU_MASK_ALL) != 0 && (new.l & _FPU_MASK_ALL) == 0)
(void)__fe_mask_env ();
/* Atomically enable and raise (if appropriate) exceptions set in `new'. */

2
sysdeps/powerpc/fpu/fgetexcptflg.c
View File

@ -27,7 +27,7 @@ __fegetexceptflag (fexcept_t *flagp, int excepts)
u.fenv = fegetenv_register ();
/* Return (all of) it. */
*flagp = u.l[1] & excepts & FE_ALL_EXCEPT;
*flagp = u.l & excepts & FE_ALL_EXCEPT;
/* Success. */
return 0;

12
sysdeps/powerpc/fpu/fraiseexcpt.c
View File

@ -33,11 +33,11 @@ __feraiseexcept (int excepts)
u.fenv = fegetenv_register ();
/* Add the exceptions */
u.l[1] = (u.l[1]
| (excepts & FPSCR_STICKY_BITS)
/* Turn FE_INVALID into FE_INVALID_SOFTWARE. */
| (excepts >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT))
& FE_INVALID_SOFTWARE));
u.l = (u.l
| (excepts & FPSCR_STICKY_BITS)
/* Turn FE_INVALID into FE_INVALID_SOFTWARE. */
| (excepts >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT))
& FE_INVALID_SOFTWARE));
/* Store the new status word (along with the rest of the environment),
triggering any appropriate exceptions. */
@ -49,7 +49,7 @@ __feraiseexcept (int excepts)
don't have FE_INVALID_SOFTWARE implemented. Detect this
case and raise FE_INVALID_SNAN instead. */
u.fenv = fegetenv_register ();
if ((u.l[1] & FE_INVALID) == 0)
if ((u.l & FE_INVALID) == 0)
set_fpscr_bit (FPSCR_VXSNAN);
}

8
sysdeps/powerpc/fpu/fsetexcptflg.c
View File

@ -31,10 +31,10 @@ __fesetexceptflag (const fexcept_t *flagp, int excepts)
flag = *flagp & excepts;
/* Replace the exception status */
u.l[1] = ((u.l[1] & ~(FPSCR_STICKY_BITS & excepts))
| (flag & FPSCR_STICKY_BITS)
| (flag >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT))
& FE_INVALID_SOFTWARE));
u.l = ((u.l & ~(FPSCR_STICKY_BITS & excepts))
| (flag & FPSCR_STICKY_BITS)
| (flag >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT))
& FE_INVALID_SOFTWARE));
/* Store the new status word (along with the rest of the environment).
This may cause floating-point exceptions if the restored state

2
sysdeps/powerpc/fpu/ftestexcept.c
View File

@ -28,6 +28,6 @@ fetestexcept (int excepts)
/* The FE_INVALID bit is dealt with correctly by the hardware, so we can
just: */
return u.l[1] & excepts;
return u.l & excepts;
}
libm_hidden_def (fetestexcept)