Remove support for PowerPC SPE extension (powerpc*-*-*gnuspe*).

GCC 9 dropped support for the SPE extensions to PowerPC, which means
powerpc*-*-*gnuspe* configurations are no longer buildable with that
compiler.  This ISA extension was peculiar to the “e500” line of
embedded PowerPC chips, which, as far as I can tell, are no longer
being manufactured, so I think we should follow suit.

This patch was developed by grepping for “e500”, “__SPE__”, and
“__NO_FPRS__”, and may not eliminate every vestige of SPE support.
Most uses of __NO_FPRS__ are left alone, as they are relevant to
normal embedded PowerPC with soft-float.

        * sysdeps/powerpc/preconfigure: Error out on powerpc-*-*gnuspe*
        host type.
        * scripts/build-many-glibcs.py: Remove powerpc-*-linux-gnuspe
        and powerpc-*-linux-gnuspe-e500v1 from list of build configurations.

        * sysdeps/powerpc/powerpc32/e500: Recursively delete.
        * sysdeps/unix/sysv/linux/powerpc/powerpc32/e500: Recursively delete.
        * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/context-e500.h:
        Delete.

        * sysdeps/powerpc/fpu_control.h: Remove SPE variant.
        Issue an #error if used with a compiler in SPE-float mode.
        * sysdeps/powerpc/powerpc32/__longjmp_common.S
        * sysdeps/powerpc/powerpc32/setjmp_common.S
        * sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext-common.S
        * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/getcontext.S
        * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/setcontext.S
        * sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/swapcontext.S
        * sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext-common.S
        * sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext-common.S:
        Remove code to preserve SPE register state.

        * sysdeps/unix/sysv/linux/powerpc/elision-lock.c
        * sysdeps/unix/sysv/linux/powerpc/elision-trylock.c
        * sysdeps/unix/sysv/linux/powerpc/elision-unlock.c
        Remove __SPE__ ifndefs.

51 files changed, 56 insertions, 1715 deletions

diff --git a/NEWS b/NEWS
index 0e4c57f273..c885b960ca 100644
--- a/NEWS
+++ b/NEWS
@@ -54,6 +54,10 @@ Deprecated and removed features, and other changes affecting compatibility:
 * With --enable-bind-now, installed programs are now linked with the
   BIND_NOW flag.
 
+* Support for the PowerPC SPE ISA extension (powerpc-*-*gnuspe*
+  configurations) has been removed, following the deprecation of this
+  subarchitecture in version 8 of GCC, and its removal in version 9.
+
 Changes to build and runtime requirements:
 
 * GCC 6.2 or later is required to build the GNU C Library.
diff --git a/scripts/build-many-glibcs.py b/scripts/build-many-glibcs.py
index 6f9a35331f..c5821df25e 100755
--- a/scripts/build-many-glibcs.py
+++ b/scripts/build-many-glibcs.py
@@ -318,15 +318,6 @@ class Context(object):
         self.add_config(arch='powerpc64le',
                         os_name='linux-gnu',
                         gcc_cfg=['--disable-multilib', '--enable-secureplt'])
-        self.add_config(arch='powerpc',
-                        os_name='linux-gnuspe',
-                        gcc_cfg=['--disable-multilib', '--enable-secureplt',
-                                 '--enable-e500-double', '--enable-obsolete'])
-        self.add_config(arch='powerpc',
-                        os_name='linux-gnuspe',
-                        variant='e500v1',
-                        gcc_cfg=['--disable-multilib', '--enable-secureplt',
-                                 '--enable-obsolete'])
         self.add_config(arch='riscv64',
                         os_name='linux-gnu',
                         variant='rv64imac-lp64',
diff --git a/sysdeps/powerpc/fpu_control.h b/sysdeps/powerpc/fpu_control.h
index e0c5cf6534..e88d81640d 100644
--- a/sysdeps/powerpc/fpu_control.h
+++ b/sysdeps/powerpc/fpu_control.h
@@ -19,6 +19,10 @@
 #ifndef _FPU_CONTROL_H
 #define _FPU_CONTROL_H
 
+#if defined __SPE__ || (defined __NO_FPRS__ && !defined _SOFT_FLOAT)
+# error "SPE/e500 is no longer supported"
+#endif
+
 #ifdef _SOFT_FLOAT
 
 # define _FPU_RESERVED 0xffffffff
@@ -28,41 +32,6 @@ typedef unsigned int fpu_control_t;
 # define _FPU_SETCW(cw) (void) (cw)
 extern fpu_control_t __fpu_control;
 
-#elif defined __NO_FPRS__ /* e500 */
-
-/* rounding control */
-# define _FPU_RC_NEAREST 0x00   /* RECOMMENDED */
-# define _FPU_RC_DOWN    0x03
-# define _FPU_RC_UP      0x02
-# define _FPU_RC_ZERO    0x01
-
-/* masking of interrupts */
-# define _FPU_MASK_ZM  0x10 /* zero divide */
-# define _FPU_MASK_OM  0x04 /* overflow */
-# define _FPU_MASK_UM  0x08 /* underflow */
-# define _FPU_MASK_XM  0x40 /* inexact */
-# define _FPU_MASK_IM  0x20 /* invalid operation */
-
-# define _FPU_RESERVED 0x00c10080 /* These bits are reserved and not changed. */
-
-/* Correct IEEE semantics require traps to be enabled at the hardware
-   level; the kernel then does the emulation and determines whether
-   generation of signals from those traps was enabled using prctl.  */
-# define _FPU_DEFAULT  0x0000003c /* Default value.  */
-# define _FPU_IEEE     _FPU_DEFAULT
-
-/* Type of the control word.  */
-typedef unsigned int fpu_control_t;
-
-/* Macros for accessing the hardware control word.  */
-# define _FPU_GETCW(cw) \
-  __asm__ volatile ("mfspefscr %0" : "=r" (cw))
-# define _FPU_SETCW(cw) \
-  __asm__ volatile ("mtspefscr %0" : : "r" (cw))
-
-/* Default control word set at startup.  */
-extern fpu_control_t __fpu_control;
-
 #else /* PowerPC 6xx floating-point.  */
 
 /* rounding control */
diff --git a/sysdeps/powerpc/powerpc32/__longjmp-common.S b/sysdeps/powerpc/powerpc32/__longjmp-common.S
index 850b02a821..e7a70076f9 100644
--- a/sysdeps/powerpc/powerpc32/__longjmp-common.S
+++ b/sysdeps/powerpc/powerpc32/__longjmp-common.S
@@ -25,12 +25,6 @@
 # include <jmpbuf-offsets.h>
 #endif
 
-#if defined __SPE__ || (defined __NO_FPRS__ && !defined _SOFT_FLOAT)
-# define LOAD_GP(N)	evldd r##N,((JB_FPRS+((N)-14)*2)*4)(r3)
-#else
-# define LOAD_GP(N)	lwz r##N,((JB_GPRS+(N)-14)*4)(r3)
-#endif
-
 ENTRY (__longjmp_symbol)
 
 #if defined PTR_DEMANGLE || defined CHECK_SP
@@ -46,13 +40,13 @@ ENTRY (__longjmp_symbol)
 	lwz r1,(JB_GPR1*4)(r3)
 #endif
 	lwz r0,(JB_LR*4)(r3)
-	LOAD_GP (14)
-	LOAD_GP (15)
-	LOAD_GP (16)
-	LOAD_GP (17)
-	LOAD_GP (18)
-	LOAD_GP (19)
-	LOAD_GP (20)
+	lwz r14,((JB_GPRS+14-14)*4)(r3)
+	lwz r15,((JB_GPRS+15-14)*4)(r3)
+	lwz r16,((JB_GPRS+16-14)*4)(r3)
+	lwz r17,((JB_GPRS+17-14)*4)(r3)
+	lwz r18,((JB_GPRS+18-14)*4)(r3)
+	lwz r19,((JB_GPRS+19-14)*4)(r3)
+	lwz r20,((JB_GPRS+20-14)*4)(r3)
 #ifdef PTR_DEMANGLE
 # ifndef CHECK_SP
 	PTR_DEMANGLE3 (r1, r24, r25)
@@ -63,19 +57,19 @@ ENTRY (__longjmp_symbol)
 	   second argument (-4@4), and target address (4@0), respectively.  */
 	LIBC_PROBE (longjmp, 3, 4@3, -4@4, 4@0)
 	mtlr r0
-	LOAD_GP (21)
-	LOAD_GP (22)
+	lwz r21,((JB_GPRS+21-14)*4)(r3)
+	lwz r22,((JB_GPRS+22-14)*4)(r3)
 	lwz r5,(JB_CR*4)(r3)
-	LOAD_GP (23)
-	LOAD_GP (24)
-	LOAD_GP (25)
+	lwz r23,((JB_GPRS+23-14)*4)(r3)
+	lwz r24,((JB_GPRS+24-14)*4)(r3)
+	lwz r25,((JB_GPRS+25-14)*4)(r3)
 	mtcrf 0xFF,r5
-	LOAD_GP (26)
-	LOAD_GP (27)
-	LOAD_GP (28)
-	LOAD_GP (29)
-	LOAD_GP (30)
-	LOAD_GP (31)
+	lwz r26,((JB_GPRS+26-14)*4)(r3)
+	lwz r27,((JB_GPRS+27-14)*4)(r3)
+	lwz r28,((JB_GPRS+28-14)*4)(r3)
+	lwz r29,((JB_GPRS+29-14)*4)(r3)
+	lwz r30,((JB_GPRS+30-14)*4)(r3)
+	lwz r31,((JB_GPRS+31-14)*4)(r3)
 	LIBC_PROBE (longjmp_target, 3, 4@3, -4@4, 4@0)
 	mr r3,r4
 	blr
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/Makefile b/sysdeps/powerpc/powerpc32/e500/nofpu/Makefile
deleted file mode 100644
index adf556870a..0000000000
--- a/sysdeps/powerpc/powerpc32/e500/nofpu/Makefile
+++ /dev/null
@@ -1,9 +0,0 @@
-ifeq ($(subdir),math)
-libm-routines += fexcepts_to_spe fexcepts_from_spe
-libm-routines += fexcepts_to_prctl fexcepts_from_prctl
-libm-routines += fe_note_change
-endif
-
-ifeq ($(subdir),soft-fp)
-sysdep_routines += fraiseexcept-soft
-endif
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feclearexcept.c b/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feclearexcept.c
deleted file mode 100644
index b94d302353..0000000000
--- a/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feclearexcept.c
+++ /dev/null
@@ -1,50 +0,0 @@
-/* Clear floating-point exceptions for atomic compound assignment.
-   e500 version.
-   Copyright (C) 2004-2019 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 <fenv_libc.h>
-#include <stdlib.h>
-#include <sysdep.h>
-#include <sys/prctl.h>
-
-void
-__atomic_feclearexcept (void)
-{
-  unsigned int fpescr, old_fpescr;
-
-  /* Get the current state.  */
-  old_fpescr = fpescr = fegetenv_register ();
-
-  /* Clear the relevant bits.  */
-  fpescr &= ~SPEFSCR_ALL_EXCEPT;
-
-  /* Put the new state in effect.  */
-  fesetenv_register (fpescr);
-
-  /* Let the kernel know if the "invalid" or "underflow" bit was
-     cleared.  */
-  if (old_fpescr & (SPEFSCR_FINVS | SPEFSCR_FUNFS))
-    {
-      int pflags __attribute__ ((__unused__)), r;
-      INTERNAL_SYSCALL_DECL (err);
-
-      r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags);
-      if (INTERNAL_SYSCALL_ERROR_P (r, err))
-	abort ();
-    }
-}
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feholdexcept.c b/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feholdexcept.c
deleted file mode 100644
index 05428b87e0..0000000000
--- a/sysdeps/powerpc/powerpc32/e500/nofpu/atomic-feholdexcept.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/* Store current floating-point environment and clear exceptions for
-   atomic compound assignment.  e500 version.
-   Copyrig