From 36c17c7079a5243a890ba43affff326a041775a9 Mon Sep 17 00:00:00 2001 From: "Paul A. Clarke" Date: Thu, 19 Sep 2019 11:31:31 -0500 Subject: [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. --- sysdeps/powerpc/fpu/fenv_private.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sysdeps') diff --git a/sysdeps/powerpc/fpu/fenv_private.h b/sysdeps/powerpc/fpu/fenv_private.h index 9496026..ade0bfa 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 -- cgit v1.1