PPC/s390: [Liftoff] Implement i64.clz and i64.ctz

Port e554dec4

Original Commit Message:

    These are two of the remaining missing instructions from the MVP.
    This CL adds support to {LiftoffCompiler} and provides assembly
    implementations for ia32, x64, arm, and arm64.

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

Change-Id: I00b9b7ef4c3b7e022e7cf57255a030949e7dca89
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1899886Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#64775}

src/wasm/baseline/ppc/liftoff-assembler-ppc.h

@@ -367,6 +367,14 @@ void LiftoffAssembler::emit_i64_shr(LiftoffRegister dst, LiftoffRegister lhs,
   bailout(kUnsupportedArchitecture, "i64_shr");
 }
 
+void LiftoffAssembler::emit_i64_clz(LiftoffRegister dst, LiftoffRegister src) {
+  bailout(kUnsupportedArchitecture, "i64_clz");
+}
+
+void LiftoffAssembler::emit_i64_ctz(LiftoffRegister dst, LiftoffRegister src) {
+  bailout(kUnsupportedArchitecture, "i64_ctz");
+}
+
 void LiftoffAssembler::emit_i32_to_intptr(Register dst, Register src) {
 #ifdef V8_TARGET_ARCH_PPC64
   bailout(kUnsupportedArchitecture, "emit_i32_to_intptr");

src/wasm/baseline/s390/liftoff-assembler-s390.h

@@ -366,6 +366,14 @@ void LiftoffAssembler::emit_i64_shr(LiftoffRegister dst, LiftoffRegister lhs,
   bailout(kUnsupportedArchitecture, "i64_shr");
 }
 
+void LiftoffAssembler::emit_i64_clz(LiftoffRegister dst, LiftoffRegister src) {
+  bailout(kUnsupportedArchitecture, "i64_clz");
+}
+
+void LiftoffAssembler::emit_i64_ctz(LiftoffRegister dst, LiftoffRegister src) {
+  bailout(kUnsupportedArchitecture, "i64_ctz");
+}
+
 void LiftoffAssembler::emit_i32_to_intptr(Register dst, Register src) {
 #ifdef V8_TARGET_ARCH_S390X
   bailout(kUnsupportedArchitecture, "emit_i32_to_intptr");