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[AArch64] Define HAVE_RM_CTX and related hooks.

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Ian Bolton 2014-04-16 23:41:04 +01:00 committed by Marcus Shawcroft
parent 7e0b6763e9
commit bc93ab2946
2 changed files with 67 additions and 0 deletions
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12
ChangeLog
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@ -1,3 +1,15 @@
2014-04-17 Ian Bolton <ian.bolton@arm.com>
Wilco Dijkstra <wilco.dijkstra@arm.com>
* sysdeps/aarch64/fpu/math_private.h (HAVE_RM_CTX)
(libc_feholdsetround_aarch64_ctx)
(libc_feholdsetround_ctx, libc_feholdsetroundf_ctx)
(libc_feholdsetroundl_ctx, libc_feresetround_aarch64_ctx)
(libc_feresetround_ctx, libc_feresetroundf_ctx)
(libc_feresetroundl_ctx, libc_feresetround_noex_aarch64_ctx)
(libc_feresetround_noex_ctx, libc_feresetround_noexf_ctx)
(libc_feresetround_noexl_ctx): Define.
2014-04-16 Richard Henderson <rth@redhat.com>
* sysdeps/unix/sysv/linux/alpha/nptl/pthread_once.c: Remove.

55
sysdeps/aarch64/fpu/math_private.h
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@ -209,6 +209,61 @@ libc_feresetround_aarch64 (fenv_t *envp)
#define libc_feresetroundf libc_feresetround_aarch64
#define libc_feresetroundl libc_feresetround_aarch64
/* We have support for rounding mode context. */
#define HAVE_RM_CTX 1
static __always_inline void
libc_feholdsetround_aarch64_ctx (struct rm_ctx *ctx, int r)
{
fpu_control_t fpcr, fpsr, round;
_FPU_GETCW (fpcr);
_FPU_GETFPSR (fpsr);
ctx->env.__fpsr = fpsr;
/* Check whether rounding modes are different. */
round = (fpcr ^ r) & FE_TOWARDZERO;
ctx->updated_status = round != 0;
/* Set the rounding mode if changed. */
if (__glibc_unlikely (round != 0))
{
ctx->env.__fpcr = fpcr;
_FPU_SETCW (fpcr ^ round);
}
}
#define libc_feholdsetround_ctx libc_feholdsetround_aarch64_ctx
#define libc_feholdsetroundf_ctx libc_feholdsetround_aarch64_ctx
#define libc_feholdsetroundl_ctx libc_feholdsetround_aarch64_ctx
static __always_inline void
libc_feresetround_aarch64_ctx (struct rm_ctx *ctx)
{
/* Restore the rounding mode if updated. */
if (__glibc_unlikely (ctx->updated_status))
_FPU_SETCW (ctx->env.__fpcr);
}
#define libc_feresetround_ctx libc_feresetround_aarch64_ctx
#define libc_feresetroundf_ctx libc_feresetround_aarch64_ctx
#define libc_feresetroundl_ctx libc_feresetround_aarch64_ctx
static __always_inline void
libc_feresetround_noex_aarch64_ctx (struct rm_ctx *ctx)
{
/* Restore the rounding mode if updated. */
if (__glibc_unlikely (ctx->updated_status))
_FPU_SETCW (ctx->env.__fpcr);
/* Write new FPSR to restore exception flags. */
_FPU_SETFPSR (ctx->env.__fpsr);
}
#define libc_feresetround_noex_ctx libc_feresetround_noex_aarch64_ctx
#define libc_feresetround_noexf_ctx libc_feresetround_noex_aarch64_ctx
#define libc_feresetround_noexl_ctx libc_feresetround_noex_aarch64_ctx
#include_next <math_private.h>
#endif