diff options
| -rw-r--r-- | ChangeLog | 18 | ||||
| -rw-r--r-- | sysdeps/powerpc/bits/fenvinline.h | 37 | ||||
| -rw-r--r-- | sysdeps/powerpc/fpu/fegetexcept.c | 2 | ||||
| -rw-r--r-- | sysdeps/powerpc/fpu/fegetmode.c | 2 | ||||
| -rw-r--r-- | sysdeps/powerpc/fpu/fenv_libc.h | 21 | ||||
| -rw-r--r-- | sysdeps/powerpc/fpu_control.h | 44 |
6 files changed, 94 insertions, 30 deletions
@@ -1,3 +1,21 @@ +2019-06-30 Paul A. Clarke <pc@us.ibm.com> + + * sysdeps/powerpc/bits/fenvinline.h (__fegetround): Use + __fegetround_ISA300() or __fegetround_ISA2() as appropriate. + (__fegetround_ISA300) New. + (__fegetround_ISA2) New. + * sysdeps/powerpc/fpu_control.h (IS_ISA300): New. + (_FPU_MFFS): Move implementation... + (_FPU_GETCW): Here. + (_FPU_MFFSL): Move implementation.... + (_FPU_GET_RC_ISA300): Here. New. + (_FPU_GET_RC): Use _FPU_GET_RC_ISA300() or _FPU_GETCW() as appropriate. + * sysdeps/powerpc/fpu/fenv_libc.h (fegetenv_status_ISA300): New. + (fegetenv_status): New. + * sysdeps/powerpc/fpu/fegetmode.c (fegetmode): Use fegetenv_status() + instead of fegetenv_register(). + * sysdeps/powerpc/fpu/fegetexcept.c (__fegetexcept): Likewise. + 2019-06-28 Wilco Dijkstra <wdijkstr@arm.com> * benchtests/bench-math-inlines.c: Increase iterations. diff --git a/sysdeps/powerpc/bits/fenvinline.h b/sysdeps/powerpc/bits/fenvinline.h index 7079d1a..56ac0f3 100644 --- a/sysdeps/powerpc/bits/fenvinline.h +++ b/sysdeps/powerpc/bits/fenvinline.h @@ -18,13 +18,36 @@ #if defined __GNUC__ && !defined _SOFT_FLOAT && !defined __NO_FPRS__ -/* Inline definition for fegetround. */ -# define __fegetround() \ - (__extension__ ({ int __fegetround_result; \ - __asm__ __volatile__ \ - ("mcrfs 7,7 ; mfcr %0" \ - : "=r"(__fegetround_result) : : "cr7"); \ - __fegetround_result & 3; })) +/* Inline definitions for fegetround. */ +# define __fegetround_ISA300() \ + (__extension__ ({ \ + union { double __d; unsigned long long __ll; } __u; \ + __asm__ __volatile__ ( \ + ".machine push; .machine \"power9\"; mffsl %0; .machine pop" \ + : "=f" (__u.__d)); \ + __u.__ll & 0x0000000000000003LL; \ + })) + +# define __fegetround_ISA2() \ + (__extension__ ({ \ + int __fegetround_result; \ + __asm__ __volatile__ ("mcrfs 7,7 ; mfcr %0" \ + : "=r"(__fegetround_result) : : "cr7"); \ + __fegetround_result & 3; \ + })) + +# ifdef _ARCH_PWR9 +# define __fegetround() __fegetround_ISA300() +# elif defined __BUILTIN_CPU_SUPPORTS__ +# define __fegetround() \ + (__glibc_likely (__builtin_cpu_supports ("arch_3_00")) \ + ? __fegetround_ISA300() \ + : __fegetround_ISA2() \ + ) +# else +# define __fegetround() __fegetround_ISA2() +# endif + # define fegetround() __fegetround () # ifndef __NO_MATH_INLINES diff --git a/sysdeps/powerpc/fpu/fegetexcept.c b/sysdeps/powerpc/fpu/fegetexcept.c index 2173d77..10a37f0 100644 --- a/sysdeps/powerpc/fpu/fegetexcept.c +++ b/sysdeps/powerpc/fpu/fegetexcept.c @@ -24,7 +24,7 @@ __fegetexcept (void) { fenv_union_t fe; - fe.fenv = fegetenv_register (); + fe.fenv = fegetenv_status (); return fenv_reg_to_exceptions (fe.l); } diff --git a/sysdeps/powerpc/fpu/fegetmode.c b/sysdeps/powerpc/fpu/fegetmode.c index f43ab60..466f5b7 100644 --- a/sysdeps/powerpc/fpu/fegetmode.c +++ b/sysdeps/powerpc/fpu/fegetmode.c @@ -21,6 +21,6 @@ int fegetmode (femode_t *modep) { - *modep = fegetenv_register (); + *modep = fegetenv_status (); return 0; } diff --git a/sysdeps/powerpc/fpu/fenv_libc.h b/sysdeps/powerpc/fpu/fenv_libc.h index f66bf24..55b1697 100644 --- a/sysdeps/powerpc/fpu/fenv_libc.h +++ b/sysdeps/powerpc/fpu/fenv_libc.h @@ -34,6 +34,27 @@ extern const fenv_t *__fe_mask_env (void) attribute_hidden; pointer. */ #define fegetenv_register() __builtin_mffs() +/* Equivalent to fegetenv_register, but only returns bits for + status, exception enables, and mode. */ + +#define fegetenv_status_ISA300() \ + ({register double __fr; \ + __asm__ __volatile__ ( \ + ".machine push; .machine \"power9\"; mffsl %0; .machine pop" \ + : "=f" (__fr)); \ + __fr; \ + }) + +#ifdef _ARCH_PWR9 +# define fegetenv_status() fegetenv_status_ISA300() +#else +# define fegetenv_status() \ + (__glibc_likely (__builtin_cpu_supports ("arch_3_00")) \ + ? fegetenv_status_ISA300() \ + : fegetenv_register() \ + ) +#endif + /* Equivalent to fesetenv, but takes a fenv_t instead of a pointer. */ #define fesetenv_register(env) \ do { \ diff --git a/sysdeps/powerpc/fpu_control.h b/sysdeps/powerpc/fpu_control.h index fa04a67..d0fdad7 100644 --- a/sysdeps/powerpc/fpu_control.h +++ b/sysdeps/powerpc/fpu_control.h @@ -65,35 +65,37 @@ extern fpu_control_t __fpu_control; typedef unsigned int fpu_control_t; /* Macros for accessing the hardware control word. */ -# define __FPU_MFFS() \ - ({register double __fr; \ - __asm__ __volatile__("mffs %0" : "=f" (__fr)); \ - __fr; \ - }) - # define _FPU_GETCW(cw) \ ({union { double __d; unsigned long long __ll; } __u; \ - __u.__d = __FPU_MFFS(); \ + __asm__ __volatile__("mffs %0" : "=f" (__u.__d)); \ (cw) = (fpu_control_t) __u.__ll; \ (fpu_control_t) __u.__ll; \ }) -#ifdef _ARCH_PWR9 -# define __FPU_MFFSL() \ - ({register double __fr; \ - __asm__ __volatile__("mffsl %0" : "=f" (__fr)); \ - __fr; \ +# define _FPU_GET_RC_ISA300() \ + ({union { double __d; unsigned long long __ll; } __u; \ + __asm__ __volatile__( \ + ".machine push; .machine \"power9\"; mffsl %0; .machine pop" \ + : "=f" (__u.__d)); \ + (fpu_control_t) (__u.__ll & _FPU_MASK_RC); \ }) -#else -# define __FPU_MFFSL() __FPU_MFFS() -#endif - -# define _FPU_GET_RC() \ - ({union { double __d; unsigned long long __ll; } __u; \ - __u.__d = __FPU_MFFSL(); \ - __u.__ll &= _FPU_MASK_RC; \ - (fpu_control_t) __u.__ll; \ + +# ifdef _ARCH_PWR9 +# define _FPU_GET_RC() _FPU_GET_RC_ISA300() +# elif defined __BUILTIN_CPU_SUPPORTS__ +# define _FPU_GET_RC() \ + ({fpu_control_t __rc; \ + __rc = __glibc_likely (__builtin_cpu_supports ("arch_3_00")) \ + ? _FPU_GET_RC_ISA300 () \ + : _FPU_GETCW (__rc) & _FPU_MASK_RC; \ + __rc; \ + }) +# else +# define _FPU_GET_RC() \ + ({fpu_control_t __rc = _FPU_GETCW (__rc) & _FPU_MASK_RC; \ + __rc; \ }) +# endif # define _FPU_SETCW(cw) \ { union { double __d; unsigned long long __ll; } __u; \ |