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[PATCH] powerpc: POWER7 optimizations for copysign
- From: Luis Machado <luisgpm at linux dot vnet dot ibm dot com>
- To: libc-alpha <libc-alpha at sourceware dot org>
- Date: Wed, 14 Jul 2010 16:42:36 -0300
- Subject: [PATCH] powerpc: POWER7 optimizations for copysign
- Reply-to: luisgpm at linux dot vnet dot ibm dot com
Hi,
Follows 32-bit and 64-bit optimizations for copysign on POWER7. Really
simple patch, not much to explain.
Regtested for 32/64-bit powerpc.
Regards,
Luis
2010-06-14 Luis Machado <luisgpm@br.ibm.com>
* sysdeps/powerpc/powerpc32/power7/fpu/s_copysign.S: New file.
* sysdeps/powerpc/powerpc32/power7/fpu/s_copysignf.S: New file.
* sysdeps/powerpc/powerpc64/power7/fpu/s_copysign.S: New file.
* sysdeps/powerpc/powerpc64/power7/fpu/s_copysignf.S: New file.
diff --git a/sysdeps/powerpc/powerpc32/power7/fpu/s_copysign.S b/sysdeps/powerpc/powerpc32/power7/fpu/s_copysign.S
new file mode 100644
index 0000000..4edf654
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power7/fpu/s_copysign.S
@@ -0,0 +1,55 @@
+/* copysign(). PowerPC32/POWER7 version.
+ Copyright (C) 2010 Free Software Foundation, Inc.
+ Contributed by Luis Machado <luisgpm@br.ibm.com>.
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+#include <math_ldbl_opt.h>
+
+/* double [f1] copysign (double [f1] x, double [f2] y);
+ copysign(x,y) returns a value with the magnitude of x and
+ with the sign bit of y. */
+
+ .section ".text"
+ .type __copysign, @function
+ .machine power7
+EALIGN (__copysign, 4, 0)
+ fcpsgn fp1,fp2,fp1
+ blr
+END (__copysign)
+
+hidden_def (__copysign)
+weak_alias (__copysign, copysign)
+
+/* It turns out that the 'double' version will also always work for
+ single-precision. */
+strong_alias (__copysign, __copysignf)
+hidden_def (__copysignf)
+weak_alias (__copysignf, copysignf)
+
+#ifdef NO_LONG_DOUBLE
+strong_alias (__copysign, __copysignl)
+weak_alias (__copysign, copysignl)
+#endif
+
+#ifndef IS_IN_libm
+# if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
+compat_symbol (libc, __copysign, __copysignl, GLIBC_2_0);
+compat_symbol (libc, copysign, copysignl, GLIBC_2_0);
+# endif
+#endif
diff --git a/sysdeps/powerpc/powerpc32/power7/fpu/s_copysignf.S b/sysdeps/powerpc/powerpc32/power7/fpu/s_copysignf.S
new file mode 100644
index 0000000..bdd21bd
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power7/fpu/s_copysignf.S
@@ -0,0 +1 @@
+/* This function uses the same code as s_copysign.S. */
diff --git a/sysdeps/powerpc/powerpc64/power7/fpu/s_copysign.S b/sysdeps/powerpc/powerpc64/power7/fpu/s_copysign.S
new file mode 100644
index 0000000..106af31
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power7/fpu/s_copysign.S
@@ -0,0 +1,56 @@
+/* copysign(). PowerPC64/POWER7 version.
+ Copyright (C) 2010 Free Software Foundation, Inc.
+ Contributed by Luis Machado <luisgpm@br.ibm.com>.
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+#include <math_ldbl_opt.h>
+
+/* double [f1] copysign (double [f1] x, double [f2] y);
+ copysign(x,y) returns a value with the magnitude of x and
+ with the sign bit of y. */
+
+ .section ".text"
+ .type __copysign, @function
+ .machine power7
+EALIGN (__copysign, 4, 0)
+ CALL_MCOUNT 0
+ fcpsgn fp1,fp2,fp1
+ blr
+END (__copysign)
+
+hidden_def (__copysign)
+weak_alias (__copysign, copysign)
+
+/* It turns out that the 'double' version will also always work for
+ single-precision. */
+strong_alias (__copysign, __copysignf)
+hidden_def (__copysignf)
+weak_alias (__copysignf, copysignf)
+
+#ifdef NO_LONG_DOUBLE
+strong_alias (__copysign, __copysignl)
+weak_alias (__copysign, copysignl)
+#endif
+
+#ifndef IS_IN_libm
+# if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
+compat_symbol (libc, __copysign, __copysignl, GLIBC_2_0);
+compat_symbol (libc, copysign, copysignl, GLIBC_2_0);
+# endif
+#endif
diff --git a/sysdeps/powerpc/powerpc64/power7/fpu/s_copysignf.S b/sysdeps/powerpc/powerpc64/power7/fpu/s_copysignf.S
new file mode 100644
index 0000000..bdd21bd
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power7/fpu/s_copysignf.S
@@ -0,0 +1 @@
+/* This function uses the same code as s_copysign.S. */