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eglibc: Do not use fsqrt in libm when building for fsl ppc with fpu

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(From OE-Core rev: f06097f4581e4c728c2950a86e025384e4bdcdf0)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Khem Raj
2012-09-11 16:38:20 -07:00
committed by Richard Purdie
parent c98b7e815e
commit 7cab823d21
2 changed files with 46 additions and 1 deletions
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44
meta/recipes-core/eglibc/eglibc-2.16/fsl-ppc-no-fsqrt.patch Normal file
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@@ -0,0 +1,44 @@
Create e5500 specific math_private.h and let it include when compiling for e5500/64bit core
We prefefine __CPU_HAS_FSQRT to 0 and then in general ppc64 math_private.h we check if its
already defined before redefining it. This way we can ensure that on e5500 builds it wont
emit fsqrt intructions
-Khem
Upstream-Status: Pending
Index: libc/sysdeps/powerpc/fpu/math_private.h
===================================================================
--- libc.orig/sysdeps/powerpc/fpu/math_private.h 2012-09-03 22:37:58.000000000 -0700
+++ libc/sysdeps/powerpc/fpu/math_private.h 2012-09-17 09:35:09.709124003 -0700
@@ -25,10 +25,12 @@
#include <dl-procinfo.h>
#include_next <math_private.h>
-# if __WORDSIZE == 64 || defined _ARCH_PWR4
-# define __CPU_HAS_FSQRT 1
-# else
-# define __CPU_HAS_FSQRT ((GLRO(dl_hwcap) & PPC_FEATURE_64) != 0)
+# ifndef __CPU_HAS_FSQRT
+# if __WORDSIZE == 64 || defined _ARCH_PWR4
+# define __CPU_HAS_FSQRT 1
+# else
+# define __CPU_HAS_FSQRT ((GLRO(dl_hwcap) & PPC_FEATURE_64) != 0)
+# endif
# endif
extern double __slow_ieee754_sqrt (double);
Index: libc/ports/sysdeps/powerpc/powerpc64/e5500/fpu/math_private.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ libc/ports/sysdeps/powerpc/powerpc64/e5500/fpu/math_private.h 2012-09-17 09:56:59.129124074 -0700
@@ -0,0 +1,9 @@
+#ifndef _E5500_MATH_PRIVATE_H_
+#define _E5500_MATH_PRIVATE_H_ 1
+/* E5500 core FPU does not implement
+ fsqrt */
+
+#define __CPU_HAS_FSQRT 0
+#include_next <math_private.h>
+
+#endif /* _E5500_MATH_PRIVATE_H_ */

3
meta/recipes-core/eglibc/eglibc_2.16.bb
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@@ -3,7 +3,7 @@ require eglibc.inc
SRCREV = "20393"
DEPENDS += "gperf-native kconfig-frontends-native"
PR = "r9"
PR = "r10"
PR_append = "+svnr${SRCPV}"
EGLIBC_BRANCH="eglibc-2_16"
@@ -30,6 +30,7 @@ SRC_URI = "svn://www.eglibc.org/svn/branches/;module=${EGLIBC_BRANCH};protocol=h
file://0002-eglibc-menuconfig-hex-string-options.patch \
file://0003-eglibc-menuconfig-build-instructions.patch \
file://0001-Add-name_to_handle_at-open_by_handle-etc.-to-PowerPC.patch \
file://fsl-ppc-no-fsqrt.patch \
"
LIC_FILES_CHKSUM = "file://LICENSES;md5=98a1128c4b58120182cbea3b1752d8b9 \
file://COPYING;md5=393a5ca445f6965873eca0259a17f833 \