diff options
| -rw-r--r-- | ChangeLog | 12 | ||||
| -rw-r--r-- | sysdeps/aarch64/fpu/math_private.h | 55 |
2 files changed, 67 insertions, 0 deletions
@@ -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. diff --git a/sysdeps/aarch64/fpu/math_private.h b/sysdeps/aarch64/fpu/math_private.h index dbf203d..7424952 100644 --- a/sysdeps/aarch64/fpu/math_private.h +++ b/sysdeps/aarch64/fpu/math_private.h @@ -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 |