From 7b4588decd2950e82f29c33abe6b39ea8bae8cd7 Mon Sep 17 00:00:00 2001 From: Rainer Orth Date: Thu, 26 Aug 2010 15:29:31 +0000 Subject: [PATCH] fpu-387.h (has_sse): Remove cw_sse, unused. * config/fpu-387.h (has_sse): Remove cw_sse, unused. Use fixed-length asm. From-SVN: r163566 --- libgfortran/ChangeLog | 5 +++++ libgfortran/config/fpu-387.h | 5 +++-- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog index c79027adcb7..0e5da98f17d 100644 --- a/libgfortran/ChangeLog +++ b/libgfortran/ChangeLog @@ -1,3 +1,8 @@ +2010-08-26 Rainer Orth + + * config/fpu-387.h (has_sse): Remove cw_sse, unused. + Use fixed-length asm. + 2010-08-23 Tobias Burnus PR fortran/45323 diff --git a/libgfortran/config/fpu-387.h b/libgfortran/config/fpu-387.h index 5fe51b2d209..2bd9efb5512 100644 --- a/libgfortran/config/fpu-387.h +++ b/libgfortran/config/fpu-387.h @@ -64,7 +64,6 @@ has_sse (void) if (edx & bit_SSE) { struct sigaction act, oact; - unsigned int cw_sse; act.sa_handler = sigill_hdlr; sigemptyset (&act.sa_mask); @@ -72,7 +71,9 @@ has_sse (void) act.sa_flags = SA_SIGINFO; sigaction (SIGILL, &act, &oact); - asm volatile ("stmxcsr %0" : "=m" (cw_sse)); + /* We need a single SSE instruction here so the handler can safely skip + over it. */ + __asm__ volatile ("movss %xmm2,%xmm1"); sigaction (SIGILL, &oact, NULL);