From c8ec56598a5c5c9bd52765a7d126ebb46148d24a Mon Sep 17 00:00:00 2001
From: Junliang Yan <junyan@redhat.com>
Date: Thu, 24 Jun 2021 13:11:56 -0400
Subject: [PATCH] ppc: [liftoff] implement LoadCallerFrameSlot

Change-Id: Iffe01cd3b49aa8b590b4930b3ea94fb52419b83c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2985502
Auto-Submit: Junliang Yan <junyan@redhat.com>
Reviewed-by: Milad Fa <mfarazma@redhat.com>
Commit-Queue: Junliang Yan <junyan@redhat.com>
Cr-Commit-Position: refs/heads/master@{#75389}
---
 src/wasm/baseline/ppc/liftoff-assembler-ppc.h | 35 ++++++++++++++++++-
 1 file changed, 34 insertions(+), 1 deletion(-)

diff --git a/src/wasm/baseline/ppc/liftoff-assembler-ppc.h b/src/wasm/baseline/ppc/liftoff-assembler-ppc.h
index 6acb4829b0..ab48457e91 100644
--- a/src/wasm/baseline/ppc/liftoff-assembler-ppc.h
+++ b/src/wasm/baseline/ppc/liftoff-assembler-ppc.h
@@ -446,7 +446,40 @@ void LiftoffAssembler::AtomicFence() { sync(); }
 void LiftoffAssembler::LoadCallerFrameSlot(LiftoffRegister dst,
                                            uint32_t caller_slot_idx,
                                            ValueKind kind) {
-  bailout(kUnsupportedArchitecture, "LoadCallerFrameSlot");
+  int32_t offset = (caller_slot_idx + 1) * kSystemPointerSize;
+  switch (kind) {
+    case kI32: {
+#if defined(V8_TARGET_BIG_ENDIAN)
+      LoadS32(dst.gp(), MemOperand(fp, offset + 4), r0);
+      break;
+#else
+      LoadS32(dst.gp(), MemOperand(fp, offset), r0);
+      break;
+#endif
+    }
+    case kRef:
+    case kRtt:
+    case kOptRef:
+    case kRttWithDepth:
+    case kI64: {
+      LoadU64(dst.gp(), MemOperand(fp, offset), r0);
+      break;
+    }
+    case kF32: {
+      LoadF32(dst.fp(), MemOperand(fp, offset), r0);
+      break;
+    }
+    case kF64: {
+      LoadF64(dst.fp(), MemOperand(fp, offset), r0);
+      break;
+    }
+    case kS128: {
+      bailout(kSimd, "simd load");
+      break;
+    }
+    default:
+      UNREACHABLE();
+  }
 }
 
 void LiftoffAssembler::StoreCallerFrameSlot(LiftoffRegister src,