PPC/s390: [wasm] Execution budget based dynamic tiering

Port 7a93bd64

Original Commit Message:

    Temporarily behind a new flag: --new-wasm-dynamic-tiering
    The plan is to merge this into the existing --wasm-dynamic-tiering
    flag once it's been confirmed to be generally beneficial.

R=jkummerow@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
BUG=
LOG=N

Change-Id: I1ba28b60e628dc2ded33b267be62debcf1b03099
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3250936
Commit-Queue: Milad Fa <mfarazma@redhat.com>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Reviewed-by: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/main@{#77628}

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

@@ -34,11 +34,12 @@ namespace liftoff {
 //  -1   | 0xa: WASM          |
 //  -2   |     instance       |
 //  -3   |    feedback vector |
+//  -4   |    tiering budget  |
 //  -----+--------------------+---------------------------
-//  -4   |    slot 0 (high)   |   ^
-//  -5   |    slot 0 (low)    |   |
-//  -6   |    slot 1 (high)   | Frame slots
-//  -7   |    slot 1 (low)    |   |
+//  -5   |    slot 0 (high)   |   ^
+//  -6   |    slot 0 (low)    |   |
+//  -7   |    slot 1 (high)   | Frame slots
+//  -8   |    slot 1 (low)    |   |
 //       |                    |   v
 //  -----+--------------------+  <-- stack ptr (sp)
 //
@@ -48,6 +49,8 @@ constexpr int32_t kInstanceOffset =
     (FLAG_enable_embedded_constant_pool ? 3 : 2) * kSystemPointerSize;
 constexpr int kFeedbackVectorOffset =
     (FLAG_enable_embedded_constant_pool ? 4 : 3) * kSystemPointerSize;
+constexpr int kTierupBudgetOffset =
+    (FLAG_enable_embedded_constant_pool ? 5 : 4) * kSystemPointerSize;
 
 inline MemOperand GetHalfStackSlot(int offset, RegPairHalf half) {
   int32_t half_offset =
@@ -219,7 +222,7 @@ void LiftoffAssembler::AbortCompilation() { FinishCode(); }
 
 // static
 constexpr int LiftoffAssembler::StaticStackFrameSize() {
-  return liftoff::kFeedbackVectorOffset;
+  return liftoff::kTierupBudgetOffset;
 }
 
 int LiftoffAssembler::SlotSizeForType(ValueKind kind) {
@@ -1595,6 +1598,13 @@ void LiftoffAssembler::emit_i32_cond_jumpi(LiftoffCondition liftoff_cond,
   b(cond, label);
 }
 
+void LiftoffAssembler::emit_i32_subi_jump_negative(Register value,
+                                                   int subtrahend,
+                                                   Label* result_negative) {
+  SubS64(value, value, Operand(subtrahend), r0, LeaveOE, SetRC);
+  blt(result_negative, cr0);
+}
+
 void LiftoffAssembler::emit_i32_eqz(Register dst, Register src) {
   Label done;
   CmpS32(src, Operand(0), r0);

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

@@ -74,17 +74,18 @@ inline constexpr bool UseSignedOp(LiftoffCondition liftoff_cond) {
 //  -1   | 0xa: WASM          |
 //  -2   |     instance       |
 //  -3   |    feedback vector |
+//  -4   |    tiering budget  |
 //  -----+--------------------+---------------------------
-//  -4   |    slot 0 (high)   |   ^
-//  -5   |    slot 0 (low)    |   |
-//  -6   |    slot 1 (high)   | Frame slots
-//  -7   |    slot 1 (low)    |   |
+//  -5   |    slot 0 (high)   |   ^
+//  -6   |    slot 0 (low)    |   |
+//  -7   |    slot 1 (high)   | Frame slots
+//  -8   |    slot 1 (low)    |   |
 //       |                    |   v
 //  -----+--------------------+  <-- stack ptr (sp)
 //
 constexpr int32_t kInstanceOffset = 2 * kSystemPointerSize;
 constexpr int kFeedbackVectorOffset = 3 * kSystemPointerSize;
-
+constexpr int kTierupBudgetOffset = 4 * kSystemPointerSize;
 inline MemOperand GetStackSlot(uint32_t offset) {
   return MemOperand(fp, -offset);
 }
@@ -199,7 +200,7 @@ void LiftoffAssembler::AbortCompilation() { AbortedCodeGeneration(); }
 
 // static
 constexpr int LiftoffAssembler::StaticStackFrameSize() {
-  return liftoff::kFeedbackVectorOffset;
+  return liftoff::kTierupBudgetOffset;
 }
 
 int LiftoffAssembler::SlotSizeForType(ValueKind kind) {
@@ -2126,6 +2127,13 @@ void LiftoffAssembler::emit_i32_cond_jumpi(LiftoffCondition liftoff_cond,
     bind(&done);            \
   }
 
+void LiftoffAssembler::emit_i32_subi_jump_negative(Register value,
+                                                   int subtrahend,
+                                                   Label* result_negative) {
+  SubS64(value, value, Operand(subtrahend));
+  blt(result_negative);
+}
+
 void LiftoffAssembler::emit_i32_eqz(Register dst, Register src) {
   EMIT_EQZ(ltr, src);
 }