[deoptimizer] float32 stack on s390 and ppc is on lower 32 bit

src/deoptimizer.cc

Index: src/deoptimizer.cc
diff --git a/src/deoptimizer.cc b/src/deoptimizer.cc
index 2c3f4ec8f2dcf9e10edfc55eace4e2e1bb4f815d..3cd2caa06281c2efc2d2dff6767e050a1cd7b9e8 100644
--- a/src/deoptimizer.cc
+++ b/src/deoptimizer.cc
@@ -3132,7 +3132,11 @@ uint32_t TranslatedState::GetUInt32Slot(Address fp, int slot_offset) {
 }
 
 Float32 TranslatedState::GetFloatSlot(Address fp, int slot_offset) {
+#if !V8_TARGET_ARCH_S390X && !V8_TARGET_ARCH_PPC64

[bbudge, 2017/04/24 20:49:24]

Can you just modify the GetUInt32Slot function (combining the preprocessor
directives with the ones there)? Or is there something special about float
slots?

[john.yan, 2017/04/24 21:00:53]

Yes, float/double is treated differently than int32/int64. So we can't use
GetUInt32Slot.

   return Float32::FromBits(GetUInt32Slot(fp, slot_offset));
+#else
+  return Float32::FromBits(Memory::uint32_at(fp + slot_offset));
+#endif
 }
 
 Float64 TranslatedState::GetDoubleSlot(Address fp, int slot_offset) {