¸

1998-08-23  Ricahrd Henderson  <rth@cygnus.com>

	* sysdeps/alpha/elf/crtbegin.S: Fix .prologue; no pv used.
	* sysdeps/alpha/elf/crtend.S: Likewise.
	* sysdeps/alpha/elf/start.S: Likewise.

	* sysdeps/unix/sysv/linux/alpha/rt_sigaction.S: Fix .prologue;
	non-standard pv usage.

	* sysdeps/unix/sysv/linux/alpha/brk.S: Use jmp macro for relaxation.
	* sysdeps/unix/sysv/linux/alpha/getitimer.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/getrusage.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/gettimeofday.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/ieee_get_fp_control.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/ieee_set_fp_control.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/select.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/setitimer.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/settimeofday.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/utimes.S: Likewise.
	* sysdeps/unix/sysv/linux/alpha/wait4.S: Likewise.

	* sysdeps/alpha/fpu/e_sqrt.c: Use the asm version when the input is
	a finite non-denormal, deferring to the full IEEE version otherwise.

	* sysdeps/alpha/fpu/bits/mathinline.h (__floorf, __floor):
	Early out for -0.  Optimize for !_IEEE_FP_INEXACT.
	* sysdeps/alpha/fpu/s_floor.c: New.
	* sysdeps/alpha/fpu/s_floorf.c: New.
	* sysdeps/alpha/fpu/s_ceil.c: New.
	* sysdeps/alpha/fpu/s_ceilf.c: New.

1 files changed, 59 insertions, 0 deletions

diff --git a/sysdeps/alpha/fpu/s_ceilf.c b/sysdeps/alpha/fpu/s_ceilf.c
new file mode 100644
index 0000000000..3defaeb01e
--- /dev/null
+++ b/sysdeps/alpha/fpu/s_ceilf.c
@@ -0,0 +1,59 @@
+/* Copyright (C) 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <math.h>
+
+float
+__ceilf (float x)
+{
+  if (x != 0 && fabsf (x) < 16777216.0f)  /* 1 << FLT_MANT_DIG */
+    {
+      float tmp1, tmp2;
+      unsigned long fpcr0, fpcr1;
+      unsigned long pinf = 3UL << 58;
+
+      /* Set round to +inf.  */
+      __asm __volatile("excb; mf_fpcr %0" : "=f"(fpcr0));
+      __asm __volatile("mt_fpcr %0; excb" : : "f"(fpcr0 | pinf));
+
+      /* Calculate!  
+         Note that Alpha S_Floating is stored in registers in a
+         restricted T_Floating format, so we don't even need to
+         convert back to S_Floating in the end.  The initial
+         conversion to T_Floating is needed to handle denormals.  */
+
+#ifdef _IEEE_FP_INEXACT
+      __asm("cvtst/s %3,%2\n\tcvttq/svid %2,%1\n\tcvtqt/suid %1,%0"
+	    : "=f"(x), "=&f"(tmp1), "=&f"(tmp2)
+	    : "f"(x));
+#else
+      __asm("cvtst/s %3,%2\n\tcvttq/svd %2,%1\n\tcvtqt/d %1,%0"
+	    : "=f"(x), "=&f"(tmp1), "=&f"(tmp2)
+	    : "f"(x));
+#endif
+
+      /* Reset rounding mode, while retaining new exception bits.  */
+      __asm __volatile("excb; mf_fpcr %0" : "=f"(fpcr1));
+      fpcr0 = (fpcr0 & pinf) | (fpcr1 & ~pinf);
+      __asm __volatile("mt_fpcr %0; excb" : : "f"(fpcr0));
+    }
+  return x;
+}
+
+weak_alias (__ceilf, ceilf)