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authorAdhemerval Zanella <azanella@linux.vnet.ibm.com>2014-02-27 09:45:41 -0600
committerAdhemerval Zanella <azanella@linux.vnet.ibm.com>2014-02-27 12:58:33 -0600
commit4393fc119c34e97519b9b7a4fc94066b283be452 (patch)
treedffac0629930499b0f88886fca4f1b094ef74fa5
parent487972aea52004f604c2878c8c9d3e77670f2c32 (diff)
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PowerPC: Optimized isinf/isinff for POWER8
This patch add a optimized isinf/isinff implementation for POWER8 using the new Move From VSR Doubleword instruction to gains some cycles from FP to GRP register move.
-rw-r--r--ChangeLog14
-rw-r--r--sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile5
-rw-r--r--sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf-power8.S33
-rw-r--r--sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf.c7
-rw-r--r--sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinff.c7
-rw-r--r--sysdeps/powerpc/powerpc64/power8/fpu/s_isinf.S61
-rw-r--r--sysdeps/powerpc/powerpc64/power8/fpu/s_isinff.S1
7 files changed, 122 insertions, 6 deletions
diff --git a/ChangeLog b/ChangeLog
index 45e17cc..39bc73d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,19 @@
2014-02-27 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile: Add isinf power8
+ implementation.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf-power8.S: New file:
+ POWER8 isinf ifunc implementation.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf.c (__isinf): Add
+ POWER8 implementation.
+ * sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinff.c (__isinff):
+ Likewise.
+ * sysdeps/powerpc/powerpc64/power8/fpu/s_isinf.S: New file:
+ POWER8 isinf implementation.
+ * sysdeps/powerpc/powerpc64/power8/fpu/s_isinff.S: New file.
+
+2014-02-27 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
+
* sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h (INIT_ARCH):
Add hwcap2 initialization.
* sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile: Add isnan power8
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile b/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
index 124d325..abbf7d0 100644
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/Makefile
@@ -4,7 +4,8 @@ sysdep_routines += s_isnan-power7 s_isnan-power6x s_isnan-power6 \
s_copysign-ppc64 s_finite-power7 s_finite-ppc64 \
s_finitef-ppc64 s_isinff-ppc64 s_isinf-power7 \
s_isinf-ppc64 s_modf-power5+ s_modf-ppc64 \
- s_modff-power5+ s_modff-ppc64 s_isnan-power8
+ s_modff-power5+ s_modff-ppc64 s_isnan-power8 \
+ s_isinf-power8
libm-sysdep_routines += s_isnan-power7 s_isnan-power6x s_isnan-power6 \
s_isnan-power5 s_isnan-ppc64 s_llround-power6x \
@@ -22,7 +23,7 @@ libm-sysdep_routines += s_isnan-power7 s_isnan-power6x s_isnan-power6 \
s_logbl-ppc64 s_modf-power5+ s_modf-ppc64 \
s_modff-power5+ s_modff-ppc64 e_hypot-ppc64 \
e_hypot-power7 e_hypotf-ppc64 e_hypotf-power7 \
- s_isnan-power8
+ s_isnan-power8 s_isinf-power8
CFLAGS-s_logbf-power7.c = -mcpu=power7
CFLAGS-s_logbl-power7.c = -mcpu=power7
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf-power8.S b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf-power8.S
new file mode 100644
index 0000000..979816e
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf-power8.S
@@ -0,0 +1,33 @@
+/* isinf(). PowerPC64/POWER8 version.
+ Copyright (C) 2014 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 <math_ldbl_opt.h>
+
+#undef hidden_def
+#define hidden_def(name)
+#undef weak_alias
+#define weak_alias(name, alias)
+#undef strong_alias
+#define strong_alias(name, alias)
+#undef compat_symbol
+#define compat_symbol(lib, name, alias, ver)
+
+#define __isinf __isinf_power8
+
+#include <sysdeps/powerpc/powerpc64/power8/fpu/s_isinf.S>
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf.c
index 1ee230b..e349a06 100644
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf.c
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinf.c
@@ -23,10 +23,13 @@
extern __typeof (__isinf) __isinf_ppc64 attribute_hidden;
extern __typeof (__isinf) __isinf_power7 attribute_hidden;
+extern __typeof (__isinf) __isinf_power8 attribute_hidden;
libc_ifunc (__isinf,
- (hwcap & PPC_FEATURE_ARCH_2_06)
- ? __isinf_power7
+ (hwcap2 & PPC_FEATURE2_ARCH_2_07)
+ ? __isinf_power8 :
+ (hwcap & PPC_FEATURE_ARCH_2_06)
+ ? __isinf_power7
: __isinf_ppc64);
weak_alias (__isinf, isinf)
diff --git a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinff.c b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinff.c
index 1336feb..71da7a3 100644
--- a/sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinff.c
+++ b/sysdeps/powerpc/powerpc64/fpu/multiarch/s_isinff.c
@@ -24,10 +24,13 @@
extern __typeof (__isinff) __isinff_ppc64 attribute_hidden;
/* The double-precision version also works for single-precision. */
extern __typeof (__isinff) __isinf_power7 attribute_hidden;
+extern __typeof (__isinff) __isinf_power8 attribute_hidden;
libc_ifunc (__isinff,
- (hwcap & PPC_FEATURE_ARCH_2_06)
- ? __isinf_power7
+ (hwcap2 & PPC_FEATURE2_ARCH_2_07)
+ ? __isinf_power8 :
+ (hwcap & PPC_FEATURE_ARCH_2_06)
+ ? __isinf_power7
: __isinff_ppc64);
weak_alias (__isinff, isinff)
diff --git a/sysdeps/powerpc/powerpc64/power8/fpu/s_isinf.S b/sysdeps/powerpc/powerpc64/power8/fpu/s_isinf.S
new file mode 100644
index 0000000..0e92af8
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power8/fpu/s_isinf.S
@@ -0,0 +1,61 @@
+/* isinf(). PowerPC64/POWER8 version.
+ Copyright (C) 2014 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 <math_ldbl_opt.h>
+
+#define MFVSRD_R3_V1 .byte 0x7c,0x23,0x00,0x66 /* mfvsrd r3,vs1 */
+
+/* int [r3] __isinf([fp1] x) */
+
+EALIGN (__isinf, 4, 0)
+ CALL_MCOUNT 0
+ MFVSRD_R3_V1
+ lis r9,0x7ff0 /* r9 = 0x7ff0 */
+ rldicl r10,r3,0,1 /* r10 = r3 & (0x8000000000000000) */
+ sldi r9,r9,32 /* r9 = r9 << 52 */
+ cmpd cr7,r10,r9 /* fp1 & 0x7ff0000000000000 ? */
+ beq cr7,L(inf)
+ li r3,0 /* Not inf */
+ blr
+L(inf):
+ sradi r3,r3,63 /* r3 = r3 >> 63 */
+ ori r3,r3,1 /* r3 = r3 | 0x1 */
+ blr
+END (__isinf)
+
+hidden_def (__isinf)
+weak_alias (__isinf, isinf)
+
+/* It turns out that the 'double' version will also always work for
+ single-precision. */
+strong_alias (__isinf, __isinff)
+hidden_def (__isinff)
+weak_alias (__isinff, isinff)
+
+#ifdef NO_LONG_DOUBLE
+strong_alias (__isinf, __isinfl)
+weak_alias (__isinf, isinfl)
+#endif
+
+#ifndef IS_IN_libm
+# if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
+compat_symbol (libc, __isinf, __isinfl, GLIBC_2_0);
+compat_symbol (libc, isinf, isinfl, GLIBC_2_0);
+# endif
+#endif
diff --git a/sysdeps/powerpc/powerpc64/power8/fpu/s_isinff.S b/sysdeps/powerpc/powerpc64/power8/fpu/s_isinff.S
new file mode 100644
index 0000000..be759e0
--- /dev/null
+++ b/sysdeps/powerpc/powerpc64/power8/fpu/s_isinff.S
@@ -0,0 +1 @@
+/* This function uses the same code as s_isinf.S. */