From 2b274fd8c9c776cf70fcdb8356e678ada522a7b0 Mon Sep 17 00:00:00 2001 From: Michael Hudson-Doyle Date: Fri, 12 Aug 2022 11:29:31 +1200 Subject: Ensure calculations happen with desired rounding mode in y1lf128 math/test-float128-y1 fails on x86_64 and ppc64el with gcc 12 and -O3, because code inside a block guarded by SET_RESTORE_ROUNDL is being moved after the rounding mode has been restored. Use math_force_eval to prevent this (and insert some math_opt_barrier calls to prevent code from being moved before the rounding mode is set). Fixes #29463 Reviewed-By: Wilco Dijkstra --- sysdeps/ieee754/ldbl-128/e_j1l.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'sysdeps/ieee754/ldbl-128') diff --git a/sysdeps/ieee754/ldbl-128/e_j1l.c b/sysdeps/ieee754/ldbl-128/e_j1l.c index 54c4576..9a9c5c6 100644 --- a/sysdeps/ieee754/ldbl-128/e_j1l.c +++ b/sysdeps/ieee754/ldbl-128/e_j1l.c @@ -869,10 +869,13 @@ __ieee754_y1l (_Float128 x) { /* 0 <= x <= 2 */ SET_RESTORE_ROUNDL (FE_TONEAREST); + xx = math_opt_barrier (xx); + x = math_opt_barrier (x); z = xx * xx; p = xx * neval (z, Y0_2N, NY0_2N) / deval (z, Y0_2D, NY0_2D); p = -TWOOPI / xx + p; p = TWOOPI * __ieee754_logl (x) * __ieee754_j1l (x) + p; + math_force_eval (p); return p; } -- cgit v1.1