Add support for PowerPC e500, libc part only.

Math support to be done.
From Steve Papacharalambous, stevep@freescale.com

4 files changed, 372 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/powerpc/e500/__longjmp.S b/libc/sysdeps/linux/powerpc/e500/__longjmp.S
new file mode 100644
index 000000000..8161f869d
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/e500/__longjmp.S
@@ -0,0 +1,86 @@
+/* longjmp for PowerPC e500
+   Copyright (C) 1995, 1996, 1997, 1999, 2000, 2004
+   Free Software Foundation, Inc.
+   Contributed by Aldy Hernandez <aldyh@redhat.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 <features.h>
+#include "ppc_asm.h"
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+
+#if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__
+#define FP(x...) x
+#else
+#define FP(x...)
+#endif
+
+.globl      __longjmp;
+.type      __longjmp, @function;
+.align  2;
+
+__longjmp:    
+	lwz r1,(JB_GPR1*4)(r3)
+	lwz r2,(JB_GPR2*4)(r3)
+	lwz r0,(JB_LR*4)(r3)
+	lwz r14,((JB_GPRS+0)*4)(r3)
+FP(	evldd r14,((JB_FPRS+0*2)*4)(r3))
+	lwz r15,((JB_GPRS+1)*4)(r3)
+FP(	evldd r15,((JB_FPRS+1*2)*4)(r3))
+	lwz r16,((JB_GPRS+2)*4)(r3)
+FP(	evldd r16,((JB_FPRS+2*2)*4)(r3))
+	lwz r17,((JB_GPRS+3)*4)(r3)
+FP(	evldd r17,((JB_FPRS+3*2)*4)(r3))
+	lwz r18,((JB_GPRS+4)*4)(r3)
+FP(	evldd r18,((JB_FPRS+4*2)*4)(r3))
+	lwz r19,((JB_GPRS+5)*4)(r3)
+FP(	evldd r19,((JB_FPRS+5*2)*4)(r3))
+	lwz r20,((JB_GPRS+6)*4)(r3)
+FP(	evldd r20,((JB_FPRS+6*2)*4)(r3))
+	mtlr r0
+	lwz r21,((JB_GPRS+7)*4)(r3)
+FP(	evldd r21,((JB_FPRS+7*2)*4)(r3))
+	lwz r22,((JB_GPRS+8)*4)(r3)
+FP(	evldd r22,((JB_FPRS+8*2)*4)(r3))
+	lwz r0,(JB_CR*4)(r3)
+	lwz r23,((JB_GPRS+9)*4)(r3)
+FP(	evldd r23,((JB_FPRS+9*2)*4)(r3))
+	lwz r24,((JB_GPRS+10)*4)(r3)
+FP(	evldd r24,((JB_FPRS+10*2)*4)(r3))
+	lwz r25,((JB_GPRS+11)*4)(r3)
+FP(	evldd r25,((JB_FPRS+11*2)*4)(r3))
+	mtcrf 0xFF,r0
+	lwz r26,((JB_GPRS+12)*4)(r3)
+FP(	evldd r26,((JB_FPRS+12*2)*4)(r3))
+	lwz r27,((JB_GPRS+13)*4)(r3)
+FP(	evldd r27,((JB_FPRS+13*2)*4)(r3))
+	lwz r28,((JB_GPRS+14)*4)(r3)
+FP(	evldd r28,((JB_FPRS+14*2)*4)(r3))
+	lwz r29,((JB_GPRS+15)*4)(r3)
+FP(	evldd r29,((JB_FPRS+15*2)*4)(r3))
+	lwz r30,((JB_GPRS+16)*4)(r3)
+FP(	evldd r30,((JB_FPRS+16*2)*4)(r3))
+	lwz r31,((JB_GPRS+17)*4)(r3)
+FP(	evldd r31,((JB_FPRS+17*2)*4)(r3))
+	mr r3,r4
+	blr
+.size     __longjmp,.-__longjmp
+
+libc_hidden_def(__longjmp)
diff --git a/libc/sysdeps/linux/powerpc/e500/fenv_top.h b/libc/sysdeps/linux/powerpc/e500/fenv_top.h
new file mode 100644
index 000000000..8a06f024e
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/e500/fenv_top.h
@@ -0,0 +1,136 @@
+/* Copyright (C) 1997, 1999, 2000 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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/*
+ * ISO C99 7.6: Floating-point environment	<fenv.h>
+ */
+
+#ifndef _FENV_H
+#define _FENV_H	1
+
+#include <features.h>
+
+/* Get the architecture dependend definitions.  The following definitions
+   are expected to be done:
+
+   fenv_t	type for object representing an entire floating-point
+		environment
+
+   FE_DFL_ENV	macro of type pointer to fenv_t to be used as the argument
+		to functions taking an argument of type fenv_t; in this
+		case the default environment will be used
+
+   fexcept_t	type for object representing the floating-point exception
+		flags including status associated with the flags
+
+   The following macros are defined iff the implementation supports this
+   kind of exception.
+   FE_INEXACT		inexact result
+   FE_DIVBYZERO		division by zero
+   FE_UNDERFLOW		result not representable due to underflow
+   FE_OVERFLOW		result not representable due to overflow
+   FE_INVALID		invalid operation
+
+   FE_ALL_EXCEPT	bitwise OR of all supported exceptions
+
+   The next macros are defined iff the appropriate rounding mode is
+   supported by the implementation.
+   FE_TONEAREST		round to nearest
+   FE_UPWARD		round toward +Inf
+   FE_DOWNWARD		round toward -Inf
+   FE_TOWARDZERO	round toward 0
+*/
+#include <bits/fenv.h>
+
+__BEGIN_DECLS
+
+/* Floating-point exception handling.  */
+
+/* Clear the supported exceptions represented by EXCEPTS.  */
+extern int feclearexcept (int __excepts) __THROW;
+
+/* Store implementation-defined representation of the exception flags
+   indicated by EXCEPTS in the object pointed to by FLAGP.  */
+extern int fegetexceptflag (fexcept_t *__flagp, int __excepts) __THROW;
+
+/* Raise the supported exceptions represented by EXCEPTS.  */
+extern int feraiseexcept (int __excepts) __THROW;
+
+/* Set complete status for exceptions indicated by EXCEPTS according to
+   the representation in the object pointed to by FLAGP.  */
+extern int fesetexceptflag (__const fexcept_t *__flagp, int __excepts) __THROW;
+
+/* Determine which of subset of the exceptions specified by EXCEPTS are
+   currently set.  */
+extern int fetestexcept (int __excepts) __THROW;
+
+
+/* Rounding control.  */
+
+/* Get current rounding direction.  */
+extern int fegetround (void) __THROW;
+
+/* Establish the rounding direction represented by ROUND.  */
+extern int fesetround (int __rounding_direction) __THROW;
+
+
+/* Floating-point environment.  */
+
+/* Store the current floating-point environment in the object pointed
+   to by ENVP.  */
+extern int fegetenv (fenv_t *__envp) __THROW;
+
+/* Save the current environment in the object pointed to by ENVP, clear
+   exception flags and install a non-stop mode (if available) for all
+   exceptions.  */
+extern int feholdexcept (fenv_t *__envp) __THROW;
+
+/* Establish the floating-point environment represented by the object
+   pointed to by ENVP.  */
+extern int fesetenv (__const fenv_t *__envp) __THROW;
+
+/* Save current exceptions in temporary storage, install environment
+   represented by object pointed to by ENVP and raise exceptions
+   according to saved exceptions.  */
+extern int feupdateenv (__const fenv_t *__envp) __THROW;
+
+
+/* Include optimization.  */
+#ifdef __OPTIMIZE__
+# include <bits/fenvinline.h>
+#endif
+
+#ifdef __USE_GNU
+
+/* Enable individual exceptions.  Will not enable more exceptions than
+   EXCEPTS specifies.  Returns the previous enabled exceptions if all
+   exceptions are successfully set, otherwise returns -1.  */
+extern int feenableexcept (int __excepts) __THROW;
+
+/* Disable individual exceptions.  Will not disable more exceptions than
+   EXCEPTS specifies.  Returns the previous enabled exceptions if all
+   exceptions are successfully disabled, otherwise returns -1.  */
+extern int fedisableexcept (int __excepts) __THROW;
+
+/* Return enabled exceptions.  */
+extern int fegetexcept (void) __THROW;
+#endif
+
+__END_DECLS
+
+#endif /* fenv.h */
diff --git a/libc/sysdeps/linux/powerpc/e500/fpu_control.h b/libc/sysdeps/linux/powerpc/e500/fpu_control.h
new file mode 100644
index 000000000..10e8506ad
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/e500/fpu_control.h
@@ -0,0 +1,66 @@
+/* FPU control word definitions.  PowerPC e500 version.
+   Copyright (C) 1996, 1997, 1998, 2004 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Aldy Hernandez <aldyh@redhat.com>, 2004.
+
+   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.  */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+/* rounding control */
+#define _FPU_RC_NEAREST 0x00   /* RECOMMENDED */
+#define _FPU_RC_DOWN    0x03
+#define _FPU_RC_UP      0x02
+#define _FPU_RC_ZERO    0x01
+
+#define _FPU_MASK_NI  0x04 /* non-ieee mode */
+
+/* masking of interrupts */
+#define _FPU_MASK_ZM  0x10 /* zero divide */
+#define _FPU_MASK_OM  0x40 /* overflow */
+#define _FPU_MASK_UM  0x20 /* underflow */
+#define _FPU_MASK_XM  0x08 /* inexact */
+#define _FPU_MASK_IM  0x80 /* invalid operation */
+
+#define _FPU_RESERVED 0xff3fff7f /* These bits are reserved are not changed. */
+
+/* The fdlibm code requires no interrupts for exceptions.  */
+#define _FPU_DEFAULT  0x00000000 /* Default value.  */
+
+/* IEEE:  same as above, but (some) exceptions;
+   we leave the 'inexact' exception off.
+ */
+#define _FPU_IEEE     0x000003c0
+
+/* Type of the control word.  */
+typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__SI__)));
+
+/* Macros for accessing the hardware control word.  */
+#define _FPU_GETCW(__cw) ({ \
+  unsigned int env; \
+  asm volatile ("mfspefscr %0" : "=r" (env)); \
+  (__cw) = env; })
+#define _FPU_SETCW(__cw) ({ \
+  unsigned int env = __cw; \
+  asm volatile ("mtspefscr %0" : : "r" (env)); })
+
+#if 0
+/* Default control word set at startup.  */
+extern fpu_control_t __fpu_control;
+#endif
+
+#endif /* _FPU_CONTROL_H */
diff --git a/libc/sysdeps/linux/powerpc/e500/setjmp.S b/libc/sysdeps/linux/powerpc/e500/setjmp.S
new file mode 100644
index 000000000..6b3bbfbd6
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/e500/setjmp.S
@@ -0,0 +1,84 @@
+/* setjmp for PowerPC e500.
+   Copyright (C) 1995, 1996, 1997, 1999, 2000, 2004
+   Free Software Foundation, Inc.
+   Contributed by Aldy Hernandez <aldyh@redhat.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 <features.h>
+#include "ppc_asm.h"
+#define _ASM
+#define _SETJMP_H
+#include <bits/setjmp.h>
+
+#if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__
+#define FP(x...) x
+#else
+#define FP(x...)
+#endif
+
+.globl      __sigsetjmp;
+.type      __sigsetjmp, @function;
+.align  2;        
+
+__sigsetjmp:   
+	stw  r1,(JB_GPR1*4)(3)
+	mflr r0
+	stw  r2,(JB_GPR2*4)(3)
+	stw  r14,((JB_GPRS+0)*4)(3)
+FP(	evstdd r14,((JB_FPRS+0*2)*4)(3))
+	stw  r0,(JB_LR*4)(3)
+	stw  r15,((JB_GPRS+1)*4)(3)
+FP(	evstdd r15,((JB_FPRS+1*2)*4)(3))
+	mfcr r0
+	stw  r16,((JB_GPRS+2)*4)(3)
+FP(	evstdd r16,((JB_FPRS+2*2)*4)(3))
+	stw  r0,(JB_CR*4)(3)
+	stw  r17,((JB_GPRS+3)*4)(3)
+FP(	evstdd r17,((JB_FPRS+3*2)*4)(3))
+	stw  r18,((JB_GPRS+4)*4)(3)
+FP(	evstdd r18,((JB_FPRS+4*2)*4)(3))
+	stw  r19,((JB_GPRS+5)*4)(3)
+FP(	evstdd r19,((JB_FPRS+5*2)*4)(3))
+	stw  r20,((JB_GPRS+6)*4)(3)
+FP(	evstdd r20,((JB_FPRS+6*2)*4)(3))
+	stw  r21,((JB_GPRS+7)*4)(3)
+FP(	evstdd r21,((JB_FPRS+7*2)*4)(3))
+	stw  r22,((JB_GPRS+8)*4)(3)
+FP(	evstdd r22,((JB_FPRS+8*2)*4)(3))
+	stw  r23,((JB_GPRS+9)*4)(3)
+FP(	evstdd r23,((JB_FPRS+9*2)*4)(3))
+	stw  r24,((JB_GPRS+10)*4)(3)
+FP(	evstdd r24,((JB_FPRS+10*2)*4)(3))
+	stw  r25,((JB_GPRS+11)*4)(3)
+FP(	evstdd r25,((JB_FPRS+11*2)*4)(3))
+	stw  r26,((JB_GPRS+12)*4)(3)
+FP(	evstdd r26,((JB_FPRS+12*2)*4)(3))
+	stw  r27,((JB_GPRS+13)*4)(3)
+FP(	evstdd r27,((JB_FPRS+13*2)*4)(3))
+	stw  r28,((JB_GPRS+14)*4)(3)
+FP(	evstdd r28,((JB_FPRS+14*2)*4)(3))
+	stw  r29,((JB_GPRS+15)*4)(3)
+FP(	evstdd r29,((JB_FPRS+15*2)*4)(3))
+	stw  r30,((JB_GPRS+16)*4)(3)
+FP(	evstdd r30,((JB_FPRS+16*2)*4)(3))
+	stw  r31,((JB_GPRS+17)*4)(3)
+FP(	evstdd r31,((JB_FPRS+17*2)*4)(3))
+
+	b __sigjmp_save@local
+
+.size     __sigsetjmp,.-__sigsetjmp