buildsys: Remove support for 32-bit PPC hosts

Stop detecting 32-bit PPC host as supported.
See previous commit for rationale.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
[rth: Retain _ARCH_PPC64 check in udiv_qrnnd]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20251014173900.87497-4-philmd@linaro.org>

configure

@@ -391,16 +391,12 @@ elif check_define __sparc__ ; then
   else
     cpu="sparc"
   fi
-elif check_define _ARCH_PPC ; then
+elif check_define _ARCH_PPC64 ; then
-  if check_define _ARCH_PPC64 ; then
   if check_define _LITTLE_ENDIAN ; then
     cpu="ppc64le"
   else
     cpu="ppc64"
   fi
-  else
-    cpu="ppc"
-  fi
 elif check_define __mips__ ; then
   if check_define __mips64 ; then
     cpu="mips64"
@@ -472,11 +468,6 @@ case "$cpu" in
     linux_arch=mips
     ;;
 
-  ppc)
-    host_arch=ppc
-    linux_arch=powerpc
-    CPU_CFLAGS="-m32"
-    ;;
   ppc64)
     host_arch=ppc64
     linux_arch=powerpc
@@ -1471,7 +1462,7 @@ probe_target_compiler() {
         container_image=debian-all-test-cross
         container_cross_prefix=mips64-linux-gnuabi64-
         ;;
-      ppc|ppc64|ppc64le)
+      ppc64|ppc64le)
         container_image=debian-all-test-cross
         container_cross_prefix=powerpc${target_arch#ppc}-linux-gnu-
         ;;

disas/disas-host.c

@@ -56,11 +56,9 @@ static void initialize_debug_host(CPUDebug *s)
     s->info.cap_mode = CS_MODE_64;
     s->info.cap_insn_unit = 1;
     s->info.cap_insn_split = 8;
-#elif defined(_ARCH_PPC)
+#elif defined(_ARCH_PPC64)
     s->info.cap_arch = CS_ARCH_PPC;
-# ifdef _ARCH_PPC64
     s->info.cap_mode = CS_MODE_64;
-# endif
 #elif defined(__riscv)
 #if defined(_ILP32) || (__riscv_xlen == 32)
     s->info.print_insn = print_insn_riscv32;

include/qemu/timer.h

@@ -850,12 +850,11 @@ static inline int64_t get_clock(void)
 /*******************************************/
 /* host CPU ticks (if available) */
 
-#if defined(_ARCH_PPC)
+#if defined(_ARCH_PPC64)
 
 static inline int64_t cpu_get_host_ticks(void)
 {
     int64_t retval;
-#ifdef _ARCH_PPC64
     /* This reads timebase in one 64bit go and includes Cell workaround from:
        http://ozlabs.org/pipermail/linuxppc-dev/2006-October/027052.html
     */
@@ -863,16 +862,6 @@ static inline int64_t cpu_get_host_ticks(void)
                           "cmpwi   %0,0\n\t"
                           "beq-    $-8"
                           : "=r" (retval));
-#else
-    /* http://ozlabs.org/pipermail/linuxppc-dev/1999-October/003889.html */
-    unsigned long junk;
-    __asm__ __volatile__ ("mfspr   %1,269\n\t"  /* mftbu */
-                          "mfspr   %L0,268\n\t" /* mftb */
-                          "mfspr   %0,269\n\t"  /* mftbu */
-                          "cmpw    %0,%1\n\t"
-                          "bne     $-16"
-                          : "=r" (retval), "=r" (junk));
-#endif
     return retval;
 }
 

util/cacheflush.c

@@ -153,7 +153,7 @@ static void arch_cache_info(int *isize, int *dsize)
     }
 }
 
-#elif defined(_ARCH_PPC) && defined(__linux__)
+#elif defined(_ARCH_PPC64) && defined(__linux__)
 # include "elf.h"
 
 static void arch_cache_info(int *isize, int *dsize)
@@ -187,7 +187,7 @@ static void fallback_cache_info(int *isize, int *dsize)
     } else if (*dsize) {
         *isize = *dsize;
     } else {
-#if defined(_ARCH_PPC)
+#if defined(_ARCH_PPC64)
         /*
          * For PPC, we're going to use the cache sizes computed for
          * flush_idcache_range.  Which means that we must use the