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.

1 files changed, 18 insertions, 24 deletions

diff --git a/sysdeps/powerpc/powerpc32/setjmp-common.S b/sysdeps/powerpc/powerpc32/setjmp-common.S
index b4d77865ee..1b9629bb18 100644
--- a/sysdeps/powerpc/powerpc32/setjmp-common.S
+++ b/sysdeps/powerpc/powerpc32/setjmp-common.S
@@ -25,12 +25,6 @@
 # include <jmpbuf-offsets.h>
 #endif
 
-#if defined __SPE__ || (defined __NO_FPRS__ && !defined _SOFT_FLOAT)
-# define SAVE_GP(N)	evstdd r##N,((JB_FPRS+((N)-14)*2)*4)(3)
-#else
-# define SAVE_GP(N)	stw r##N,((JB_GPRS+(N)-14)*4)(3)
-#endif
-
 ENTRY (__sigsetjmp_symbol)
 
 #ifdef PTR_MANGLE
@@ -44,31 +38,31 @@ ENTRY (__sigsetjmp_symbol)
 	/* setjmp probe expects longjmp first argument (4@3), second argument
 	   (-4@4), and target address (4@0), respectively.  */
 	LIBC_PROBE (setjmp, 3, 4@3, -4@4, 4@0)
-	SAVE_GP (14)
+	stw  r14,((JB_GPRS+14-14)*4)(3)
 #ifdef PTR_MANGLE
 	PTR_MANGLE2 (r0, r10)
 	li   r10,0
 #endif
 	stw  r0,(JB_LR*4)(3)
-	SAVE_GP (15)
+	stw  r15,((JB_GPRS+15-14)*4)(3)
 	mfcr r0
-	SAVE_GP (16)
+	stw  r16,((JB_GPRS+16-14)*4)(3)
 	stw  r0,(JB_CR*4)(3)
-	SAVE_GP (17)
-	SAVE_GP (18)
-	SAVE_GP (19)
-	SAVE_GP (20)
-	SAVE_GP (21)
-	SAVE_GP (22)
-	SAVE_GP (23)
-	SAVE_GP (24)
-	SAVE_GP (25)
-	SAVE_GP (26)
-	SAVE_GP (27)
-	SAVE_GP (28)
-	SAVE_GP (29)
-	SAVE_GP (30)
-	SAVE_GP (31)
+	stw  r17,((JB_GPRS+17-14)*4)(3)
+	stw  r18,((JB_GPRS+18-14)*4)(3)
+	stw  r19,((JB_GPRS+19-14)*4)(3)
+	stw  r20,((JB_GPRS+20-14)*4)(3)
+	stw  r21,((JB_GPRS+21-14)*4)(3)
+	stw  r22,((JB_GPRS+22-14)*4)(3)
+	stw  r23,((JB_GPRS+23-14)*4)(3)
+	stw  r24,((JB_GPRS+24-14)*4)(3)
+	stw  r25,((JB_GPRS+25-14)*4)(3)
+	stw  r26,((JB_GPRS+26-14)*4)(3)
+	stw  r27,((JB_GPRS+27-14)*4)(3)
+	stw  r28,((JB_GPRS+28-14)*4)(3)
+	stw  r29,((JB_GPRS+29-14)*4)(3)
+	stw  r30,((JB_GPRS+30-14)*4)(3)
+	stw  r31,((JB_GPRS+31-14)*4)(3)
 #if IS_IN (rtld)
 	li   r3,0
 	blr