alpha: Purge __ASSUME_IEEE_RAISE_EXCEPTION

3 files changed, 56 insertions, 94 deletions

diff --git a/ports/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.S b/ports/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.S
new file mode 100644
index 0000000000..6e770ad66c
--- /dev/null
+++ b/ports/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.S
@@ -0,0 +1,56 @@
+/* Copyright (C) 2004-2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sysdep.h>
+#include "kernel_sysinfo.h"
+
+
+	.text
+
+ENTRY(__feraiseexcept)
+	cfi_startproc
+	PSEUDO_PROLOGUE
+
+	lda	sp, -16(sp)
+	cfi_adjust_cfa_offset(16)
+
+	ldi	v0, __NR_osf_setsysinfo
+	stq	a0, 0(sp)
+	mov	sp, a1
+	ldi	a0, SSI_IEEE_RAISE_EXCEPTION
+	call_pal PAL_callsys
+
+	lda	sp, 16(sp)
+	cfi_adjust_cfa_offset(-16)
+
+	/* Here in libm we can't use SYSCALL_ERROR_LABEL.  Nor is it clear
+	   that we'd want to set errno anyway.  All we're required to do is
+	   return non-zero on error.  Which is exactly A3.  */
+	mov	a3, v0
+	ret
+
+END(__feraiseexcept)
+	cfi_endproc
+
+#include <shlib-compat.h>
+#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
+strong_alias (__feraiseexcept, __old_feraiseexcept)
+compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
+#endif
+
+libm_hidden_ver (__feraiseexcept, feraiseexcept)
+versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
diff --git a/ports/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c b/ports/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c
deleted file mode 100644
index a01b2cf11a..0000000000
--- a/ports/sysdeps/unix/sysv/linux/alpha/fraiseexcpt.c
+++ /dev/null
@@ -1,91 +0,0 @@
-/* Copyright (C) 2004,2006 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 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
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library.  If not, see
-   <http://www.gnu.org/licenses/>.  */
-
-#include <fenv_libc.h>
-#include <sysdep.h>
-#include <float.h>
-#include <kernel-features.h>
-#include "kernel_sysinfo.h"
-
-
-int
-__feraiseexcept (int excepts)
-{
-  INTERNAL_SYSCALL_DECL (err);
-  unsigned long t = excepts;
-  long r;
-
-  r = INTERNAL_SYSCALL (osf_setsysinfo, err, 2, SSI_IEEE_RAISE_EXCEPTION, &t);
-
-#ifndef __ASSUME_IEEE_RAISE_EXCEPTION
-  if (!INTERNAL_SYSCALL_ERROR_P (r, err))
-    return 0;
-
-  double d;
-
-  /* If we got an error from SSI_IEEE_RAISE_EXCEPTION, assume it means that
-     the system call isn't actually implemented.  Do the best we can.  */
-
-  /* Invalid implemented with 0 / 0 -> NaN.  */
-  if (excepts & FE_INVALID)
-    __asm__ __volatile__ ("divs/su $f31,$f31,%0; trapb" : "=f"(d) : );
-
-  /* Division By Zero implemented with 1 / 0 -> NaN.  */
-  if (excepts & FE_DIVBYZERO)
-    __asm__ __volatile__ ("divs/su %1,$f31,%0; trapb" : "=&f"(d) : "f"(1.0f));
-
-  /* Overflow and underflow cannot be had all by themselves.  We can
-     generate them with arithmetic, but we always get INEXACT raised
-     at the same time.  Prepare to undo.  */
-  if ((excepts & (FE_OVERFLOW | FE_UNDERFLOW)) && !(excepts & FE_INEXACT))
-    INTERNAL_SYSCALL (osf_getsysinfo, err, 2, GSI_IEEE_FP_CONTROL, &t);
-
-  /* Overflow implemented with FLT_MAX + FLT_MAX -> Inf.  */
-  if (excepts & FE_OVERFLOW)
-    __asm__ __volatile__ ("adds/sui %1,%1,%0; trapb"
-			  : "=&f"(d) : "f"(FLT_MAX));
-
-  /* Underflow implemented with FLT_MIN * FLT_MIN -> 0.  */
-  if (excepts & FE_UNDERFLOW)
-    __asm__ __volatile__ ("muls/sui %1,%1,%0; trapb"
-			  : "=&f"(d) : "f"(FLT_MIN));
-
-  /* Inexact implemented with (long)0.5 -> 0.  */
-  if ((excepts & (FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)) == FE_INEXACT)
-    __asm__ __volatile__ ("cvttq/svi %1,%0; trapb" : "=&f"(d) : "f"(0.5f));
-
-  /* If we raised inexact when not asked, and inexact was not previously
-     raised, then clear that exception.  */
-  if ((excepts & (FE_OVERFLOW | FE_UNDERFLOW))
-      && !((excepts | t) & FE_INEXACT))
-    {
-      t |= excepts & SWCR_STATUS_MASK;
-      INTERNAL_SYSCALL (osf_setsysinfo, err, 2, SSI_IEEE_FP_CONTROL, &t);
-    }
-#endif /* !__ASSUME_IEEE_RAISE_EXCEPTION */
-
-  return 0;
-}
-
-#include <shlib-compat.h>
-#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2)
-strong_alias (__feraiseexcept, __old_feraiseexcept)
-compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1);
-#endif
-
-libm_hidden_ver (__feraiseexcept, feraiseexcept)
-versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2);
diff --git a/ports/sysdeps/unix/sysv/linux/alpha/kernel-features.h b/ports/sysdeps/unix/sysv/linux/alpha/kernel-features.h
index 53c282daf7..a4e8de9d9a 100644
--- a/ports/sysdeps/unix/sysv/linux/alpha/kernel-features.h
+++ b/ports/sysdeps/unix/sysv/linux/alpha/kernel-features.h
@@ -25,9 +25,6 @@
 
 #define __ASSUME_UTIMES	1
 
-/* Starting with version 2.6.9, SSI_IEEE_RAISE_EXCEPTION exists.  */
-#define __ASSUME_IEEE_RAISE_EXCEPTION	1
-
 /* Support for the O_CLOEXEC flag was added for alpha in 2.6.23.  */
 #if __LINUX_KERNEL_VERSION >= 0x020617
 # define __ASSUME_O_CLOEXEC    1