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Unified Diff: src/a64/macro-assembler-a64.h

Issue 169533002: A64: Tidy up Push and Pop TODOs. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Rebase after Abort code-size optimizations. Created 6 years, 10 months ago
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Index: src/a64/macro-assembler-a64.h
diff --git a/src/a64/macro-assembler-a64.h b/src/a64/macro-assembler-a64.h
index 7b8dd3f806734d3f4dfed8b984998b39da58b402..59fa9131cbd70b619a0a1cfc847c3bf8ad1ba050 100644
--- a/src/a64/macro-assembler-a64.h
+++ b/src/a64/macro-assembler-a64.h
@@ -28,6 +28,8 @@
#ifndef V8_A64_MACRO_ASSEMBLER_A64_H_
#define V8_A64_MACRO_ASSEMBLER_A64_H_
+#include <vector>
+
#include "v8globals.h"
#include "globals.h"
@@ -516,7 +518,8 @@ class MacroAssembler : public Assembler {
}
// Push the specified register 'count' times.
- void PushMultipleTimes(int count, Register src);
+ void PushMultipleTimes(CPURegister src, Register count);
+ void PushMultipleTimes(CPURegister src, int count);
// This is a convenience method for pushing a single Handle<Object>.
inline void Push(Handle<Object> handle);
@@ -530,6 +533,35 @@ class MacroAssembler : public Assembler {
Pop(dst);
}
+ // Sometimes callers need to push or pop multiple registers in a way that is
+ // difficult to structure efficiently for fixed Push or Pop calls. This scope
+ // allows push requests to be queued up, then flushed at once. The
+ // MacroAssembler will try to generate the most efficient sequence required.
+ //
+ // Unlike the other Push and Pop macros, PushPopQueue can handle mixed sets of
+ // register sizes and types.
+ class PushPopQueue {
+ public:
+ explicit PushPopQueue(MacroAssembler* masm) : masm_(masm), size_(0) { }
+
+ ~PushPopQueue() {
+ ASSERT(queued_.empty());
+ }
+
+ void Queue(const CPURegister& rt) {
+ size_ += rt.SizeInBytes();
+ queued_.push_back(rt);
+ }
+
+ void PushQueued();
+ void PopQueued();
+
+ private:
+ MacroAssembler* masm_;
+ int size_;
+ std::vector<CPURegister> queued_;
+ };
+
// Poke 'src' onto the stack. The offset is in bytes.
//
// If the current stack pointer (according to StackPointer()) is csp, then
@@ -2002,9 +2034,12 @@ class MacroAssembler : public Assembler {
// Perform necessary maintenance operations before a push or pop.
//
- // Note that size is per register, and is specified in bytes.
- void PrepareForPush(int count, int size);
- void PrepareForPop(int count, int size);
+ // Note that size is specified in bytes.
+ void PrepareForPush(Operand total_size);
+ void PrepareForPop(Operand total_size);
+
+ void PrepareForPush(int count, int size) { PrepareForPush(count * size); }
+ void PrepareForPop(int count, int size) { PrepareForPop(count * size); }
// Call Printf. On a native build, a simple call will be generated, but if the
// simulator is being used then a suitable pseudo-instruction is used. The
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