PPC/s390: [regexp] Allow JSRegExpResult allocations in large object space

"Operand(num_saved_registers_)" might be bigger than 16 bits. Using a 32/64 bit load/mov
instruction to overcome the problem.

Port 4c156936

Original Commit Message:

    Large regexp results may exceed kMaxRegularHeapObjectSize and must
    thus be allocated in large object space.

R=jgruber@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=
LOG=N

Change-Id: Ibfaf6150a139427f073f5f11873ad5832fc328ca
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1685027
Auto-Submit: Milad Farazmand <miladfar@ca.ibm.com>
Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Reviewed-by: Milad Farazmand <miladfar@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#62507}

src/regexp/ppc/regexp-macro-assembler-ppc.cc

@@ -756,7 +756,7 @@ Handle<HeapObject> RegExpMacroAssemblerPPC::GetCode(Handle<String> source) {
       if (num_saved_registers_ > 8) {
         // One slot beyond address of register 0.
         __ addi(r4, frame_pointer(), Operand(kRegisterZero + kPointerSize));
-        __ li(r5, Operand(num_saved_registers_));
+        __ mov(r5, Operand(num_saved_registers_));
         __ mtctr(r5);
         Label init_loop;
         __ bind(&init_loop);

src/regexp/s390/regexp-macro-assembler-s390.cc

@@ -731,7 +731,7 @@ Handle<HeapObject> RegExpMacroAssemblerS390::GetCode(Handle<String> source) {
     if (num_saved_registers_ > 8) {
       // One slot beyond address of register 0.
       __ lay(r3, MemOperand(frame_pointer(), kRegisterZero + kPointerSize));
-      __ LoadImmP(r4, Operand(num_saved_registers_));
+      __ Load(r4, Operand(num_saved_registers_));
       Label init_loop;
       __ bind(&init_loop);
       __ StoreP(r1, MemOperand(r3, -kPointerSize));

test/mjsunit/mjsunit.status

@@ -244,7 +244,7 @@
 
   # Test doesn't work on 32-bit architectures (it would require a
   # regexp pattern with too many captures).
-  'regress/regress-976627': [FAIL, ['arch == x64 or arch == arm64 or arch == mips64el', PASS]],
+  'regress/regress-976627': [FAIL, ['arch == x64 or arch == arm64 or arch == mips64el or arch == ppc64 or arch == s390x', PASS]],
 }],  # ALWAYS
 
 ['novfp3 == True', {