PPC/s390: [Liftoff] Implement i32 shift with immediate

Port 9c4ffc38

Original Commit Message:

    In fact, shifts are used most often with a fixed shift amount. This CL
    adds special handling for this in Liftoff, to generate shorter and
    faster code.

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

Change-Id: I20f8cfa6930bc20eb8db33a99bd07fce49f3f74d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1899907Reviewed-by: Junliang Yan <jyan@ca.ibm.com>
Commit-Queue: Milad Farazmand <miladfar@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#64777}

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

@@ -234,6 +234,10 @@ void LiftoffAssembler::FillStackSlotsWithZero(uint32_t index, uint32_t count) {
   void LiftoffAssembler::emit_##name(Register dst, Register src, \
                                      Register amount) {          \
     bailout(kUnsupportedArchitecture, "i32 shiftop: " #name);    \
+  }                                                              \
+  void LiftoffAssembler::emit_##name(Register dst, Register src, \
+                                     int32_t amount) {           \
+    bailout(kUnsupportedArchitecture, "i32 shiftop: " #name);    \
   }
 #define UNIMPLEMENTED_I64_SHIFTOP(name)                                        \
   void LiftoffAssembler::emit_##name(LiftoffRegister dst, LiftoffRegister src, \
@@ -329,10 +333,6 @@ void LiftoffAssembler::emit_i32_remu(Register dst, Register lhs, Register rhs,
   bailout(kUnsupportedArchitecture, "i32_remu");
 }
 
-void LiftoffAssembler::emit_i32_shr(Register dst, Register lhs, int amount) {
-  bailout(kUnsupportedArchitecture, "i32_shr");
-}
-
 bool LiftoffAssembler::emit_i64_divs(LiftoffRegister dst, LiftoffRegister lhs,
                                      LiftoffRegister rhs,
                                      Label* trap_div_by_zero,

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

@@ -233,6 +233,10 @@ void LiftoffAssembler::FillStackSlotsWithZero(uint32_t index, uint32_t count) {
   void LiftoffAssembler::emit_##name(Register dst, Register src, \
                                      Register amount) {          \
     bailout(kUnsupportedArchitecture, "i32 shiftop: " #name);    \
+  }                                                              \
+  void LiftoffAssembler::emit_##name(Register dst, Register src, \
+                                     int32_t amount) {           \
+    bailout(kUnsupportedArchitecture, "i32 shiftop: " #name);    \
   }
 #define UNIMPLEMENTED_I64_SHIFTOP(name)                                        \
   void LiftoffAssembler::emit_##name(LiftoffRegister dst, LiftoffRegister src, \
@@ -328,10 +332,6 @@ void LiftoffAssembler::emit_i32_remu(Register dst, Register lhs, Register rhs,
   bailout(kUnsupportedArchitecture, "i32_remu");
 }
 
-void LiftoffAssembler::emit_i32_shr(Register dst, Register lhs, int amount) {
-  bailout(kUnsupportedArchitecture, "i32_shr");
-}
-
 bool LiftoffAssembler::emit_i64_divs(LiftoffRegister dst, LiftoffRegister lhs,
                                      LiftoffRegister rhs,
                                      Label* trap_div_by_zero,