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authorPaul A. Clarke <pc@us.ibm.com>2019-09-19 11:31:31 -0500
committerPaul A. Clarke <pc@us.ibm.com>2019-09-27 11:01:54 -0500
commit36c17c7079a5243a890ba43affff326a041775a9 (patch)
treecba6527c4987bf4fef2c179b1b57beacaf8d73fc /sysdeps/powerpc/fpu/fenv_private.h
parent81ecb0ee4970865cbe5d1da733c4879b999c528f (diff)
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[powerpc] libc_feholdsetround_noex_ppc_ctx: optimize FPSCR write
libc_feholdsetround_noex_ppc_ctx currently performs:
1. Read FPSCR, save to context.
2. Create new FPSCR value: clear enables and set new rounding mode.
3. Write new value to FPSCR.

Since other bits just pass through, there is no need to write them.

Instead, write just the changed values (enables and rounding mode),
which can be a bit more efficient.
Diffstat (limited to 'sysdeps/powerpc/fpu/fenv_private.h')
-rw-r--r--sysdeps/powerpc/fpu/fenv_private.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/sysdeps/powerpc/fpu/fenv_private.h b/sysdeps/powerpc/fpu/fenv_private.h
index 94960262dd..ade0bfaf5f 100644
--- a/sysdeps/powerpc/fpu/fenv_private.h
+++ b/sysdeps/powerpc/fpu/fenv_private.h
@@ -142,7 +142,7 @@ libc_feholdsetround_noex_ppc_ctx (struct rm_ctx *ctx, int r)
   if (__glibc_unlikely (new.l != old.l))
     {
       __TEST_AND_ENTER_NON_STOP (old.l, 0ULL);
-      fesetenv_register (new.fenv);
+      fesetenv_mode (new.fenv);
       ctx->updated_status = true;
     }
   else