Add support for PowerPC e500, libc part only.

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

3 files changed, 237 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/powerpc/classic/__longjmp.S b/libc/sysdeps/linux/powerpc/classic/__longjmp.S
new file mode 100644
index 000000000..83f094c15
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/classic/__longjmp.S
@@ -0,0 +1,84 @@
+/* longjmp for PowerPC.
+   Copyright (C) 1995, 1996, 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.  */
+
+#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(	lfd fp14,((JB_FPRS+0*2)*4)(r3))
+	lwz r15,((JB_GPRS+1)*4)(r3)
+FP(	lfd fp15,((JB_FPRS+1*2)*4)(r3))
+	lwz r16,((JB_GPRS+2)*4)(r3)
+FP(	lfd fp16,((JB_FPRS+2*2)*4)(r3))
+	lwz r17,((JB_GPRS+3)*4)(r3)
+FP(	lfd fp17,((JB_FPRS+3*2)*4)(r3))
+	lwz r18,((JB_GPRS+4)*4)(r3)
+FP(	lfd fp18,((JB_FPRS+4*2)*4)(r3))
+	lwz r19,((JB_GPRS+5)*4)(r3)
+FP(	lfd fp19,((JB_FPRS+5*2)*4)(r3))
+	lwz r20,((JB_GPRS+6)*4)(r3)
+FP(	lfd fp20,((JB_FPRS+6*2)*4)(r3))
+	mtlr r0
+	lwz r21,((JB_GPRS+7)*4)(r3)
+FP(	lfd fp21,((JB_FPRS+7*2)*4)(r3))
+	lwz r22,((JB_GPRS+8)*4)(r3)
+FP(	lfd fp22,((JB_FPRS+8*2)*4)(r3))
+	lwz r0,(JB_CR*4)(r3)
+	lwz r23,((JB_GPRS+9)*4)(r3)
+FP(	lfd fp23,((JB_FPRS+9*2)*4)(r3))
+	lwz r24,((JB_GPRS+10)*4)(r3)
+FP(	lfd fp24,((JB_FPRS+10*2)*4)(r3))
+	lwz r25,((JB_GPRS+11)*4)(r3)
+FP(	lfd fp25,((JB_FPRS+11*2)*4)(r3))
+	mtcrf 0xFF,r0
+	lwz r26,((JB_GPRS+12)*4)(r3)
+FP(	lfd fp26,((JB_FPRS+12*2)*4)(r3))
+	lwz r27,((JB_GPRS+13)*4)(r3)
+FP(	lfd fp27,((JB_FPRS+13*2)*4)(r3))
+	lwz r28,((JB_GPRS+14)*4)(r3)
+FP(	lfd fp28,((JB_FPRS+14*2)*4)(r3))
+	lwz r29,((JB_GPRS+15)*4)(r3)
+FP(	lfd fp29,((JB_FPRS+15*2)*4)(r3))
+	lwz r30,((JB_GPRS+16)*4)(r3)
+FP(	lfd fp30,((JB_FPRS+16*2)*4)(r3))
+	lwz r31,((JB_GPRS+17)*4)(r3)
+FP(	lfd fp31,((JB_FPRS+17*2)*4)(r3))
+	mr r3,r4
+	blr
+.size     __longjmp,.-__longjmp
+
+libc_hidden_def(__longjmp)
diff --git a/libc/sysdeps/linux/powerpc/classic/fpu_control.h b/libc/sysdeps/linux/powerpc/classic/fpu_control.h
new file mode 100644
index 000000000..2df9ba0e7
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/classic/fpu_control.h
@@ -0,0 +1,71 @@
+/* FPU control word definitions.  PowerPC version.
+   Copyright (C) 1996, 1997, 1998 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.  */
+
+#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 0xffffff00 /* 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     0x000000f0
+
+/* 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) ( { \
+  union { double d; fpu_control_t cw[2]; } \
+    tmp __attribute__ ((__aligned__(8))); \
+  __asm__ ("mffs 0; stfd%U0 0,%0" : "=m" (tmp.d) : : "fr0"); \
+  (__cw)=tmp.cw[1]; \
+  tmp.cw[1]; } )
+#define _FPU_SETCW(__cw) { \
+  union { double d; fpu_control_t cw[2]; } \
+    tmp __attribute__ ((__aligned__(8))); \
+  tmp.cw[0] = 0xFFF80000; /* More-or-less arbitrary; this is a QNaN. */ \
+  tmp.cw[1] = __cw; \
+  __asm__ ("lfd%U0 0,%0; mtfsf 255,0" : : "m" (tmp.d) : "fr0"); \
+}
+
+#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/classic/setjmp.S b/libc/sysdeps/linux/powerpc/classic/setjmp.S
new file mode 100644
index 000000000..3bdf6cbfe
--- /dev/null
+++ b/libc/sysdeps/linux/powerpc/classic/setjmp.S
@@ -0,0 +1,82 @@
+/* setjmp for PowerPC.
+   Copyright (C) 1995, 1996, 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.  */
+
+#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(	stfd fp14,((JB_FPRS+0*2)*4)(3))
+	stw  r0,(JB_LR*4)(3)
+	stw  r15,((JB_GPRS+1)*4)(3)
+FP(	stfd fp15,((JB_FPRS+1*2)*4)(3))
+	mfcr r0
+	stw  r16,((JB_GPRS+2)*4)(3)
+FP(	stfd fp16,((JB_FPRS+2*2)*4)(3))
+	stw  r0,(JB_CR*4)(3)
+	stw  r17,((JB_GPRS+3)*4)(3)
+FP(	stfd fp17,((JB_FPRS+3*2)*4)(3))
+	stw  r18,((JB_GPRS+4)*4)(3)
+FP(	stfd fp18,((JB_FPRS+4*2)*4)(3))
+	stw  r19,((JB_GPRS+5)*4)(3)
+FP(	stfd fp19,((JB_FPRS+5*2)*4)(3))
+	stw  r20,((JB_GPRS+6)*4)(3)
+FP(	stfd fp20,((JB_FPRS+6*2)*4)(3))
+	stw  r21,((JB_GPRS+7)*4)(3)
+FP(	stfd fp21,((JB_FPRS+7*2)*4)(3))
+	stw  r22,((JB_GPRS+8)*4)(3)
+FP(	stfd fp22,((JB_FPRS+8*2)*4)(3))
+	stw  r23,((JB_GPRS+9)*4)(3)
+FP(	stfd fp23,((JB_FPRS+9*2)*4)(3))
+	stw  r24,((JB_GPRS+10)*4)(3)
+FP(	stfd fp24,((JB_FPRS+10*2)*4)(3))
+	stw  r25,((JB_GPRS+11)*4)(3)
+FP(	stfd fp25,((JB_FPRS+11*2)*4)(3))
+	stw  r26,((JB_GPRS+12)*4)(3)
+FP(	stfd fp26,((JB_FPRS+12*2)*4)(3))
+	stw  r27,((JB_GPRS+13)*4)(3)
+FP(	stfd fp27,((JB_FPRS+13*2)*4)(3))
+	stw  r28,((JB_GPRS+14)*4)(3)
+FP(	stfd fp28,((JB_FPRS+14*2)*4)(3))
+	stw  r29,((JB_GPRS+15)*4)(3)
+FP(	stfd fp29,((JB_FPRS+15*2)*4)(3))
+	stw  r30,((JB_GPRS+16)*4)(3)
+FP(	stfd fp30,((JB_FPRS+16*2)*4)(3))
+	stw  r31,((JB_GPRS+17)*4)(3)
+FP(	stfd fp31,((JB_FPRS+17*2)*4)(3))
+
+	b __sigjmp_save@local
+
+.size     __sigsetjmp,.-__sigsetjmp