Attachment 360613 Details for Bug 193957 – Patch for landing

[patch] Patch for landing

bug-193957-20190130134921.patch (text/plain), 3.30 KB, created by Keith Miller on 2019-01-30 13:49:23 PST

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Creator: Keith Miller

Created: 2019-01-30 13:49:23 PST

Size: 3.30 KB

patch

obsolete

>Subversion Revision: 240644
>diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
>index ad050a70c2e964c68aaa131679acf92633ffeefd..cc1ecfcdffefdad8a525ab676f7a833420db0f9e 100644
>--- a/Source/JavaScriptCore/ChangeLog
>+++ b/Source/JavaScriptCore/ChangeLog
>@@ -1,3 +1,13 @@
>+2019-01-28  Keith Miller  <keith_miller@apple.com>
>+
>+        mul32 should convert powers of 2 to an lshift
>+        https://bugs.webkit.org/show_bug.cgi?id=193957
>+
>+        Reviewed by Yusuke Suzuki.
>+
>+        * assembler/MacroAssembler.h:
>+        (JSC::MacroAssembler::mul32):
>+
> 2019-01-28  Devin Rousso  <drousso@apple.com>
> 
>         Web Inspector: provide a way to edit page WebRTC settings on a remote target
>diff --git a/Source/JavaScriptCore/assembler/MacroAssembler.h b/Source/JavaScriptCore/assembler/MacroAssembler.h
>index 3a72c2792240ab6865644570960510e6e1020d88..6f9dfeae84e583e2ae18bfc8fd6305d0f79fe00d 100644
>--- a/Source/JavaScriptCore/assembler/MacroAssembler.h
>+++ b/Source/JavaScriptCore/assembler/MacroAssembler.h
>@@ -1904,6 +1904,15 @@ public:
>         urshift32(src, trustedImm32ForShift(amount), dest);
>     }
> 
>+    void mul32(TrustedImm32 imm, RegisterID src, RegisterID dest)
>+    {
>+        if (hasOneBitSet(imm.m_value)) {
>+            lshift32(src, TrustedImm32(getLSBSet(imm.m_value)), dest);
>+            return;
>+        }
>+        MacroAssemblerBase::mul32(imm, src, dest);
>+    }
>+
>     // If the result jump is taken that means the assert passed.
>     void jitAssert(const WTF::ScopedLambda<Jump(void)>&);
> 
>diff --git a/Source/JavaScriptCore/assembler/testmasm.cpp b/Source/JavaScriptCore/assembler/testmasm.cpp
>index 8239a943dabaf42d709c7b019111ed4c2c755a08..426c38e082dfdc3438a49d5e0dd63dbb803f47da 100644
>--- a/Source/JavaScriptCore/assembler/testmasm.cpp
>+++ b/Source/JavaScriptCore/assembler/testmasm.cpp
>@@ -264,6 +264,20 @@ static Vector<float> floatOperands()
>     };
> }
> 
>+static Vector<int32_t> int32Operands()
>+{
>+    return Vector<int32_t> {
>+        0,
>+        1,
>+        -1,
>+        2,
>+        -2,
>+        42,
>+        -42,
>+        std::numeric_limits<int32_t>::max(),
>+        std::numeric_limits<int32_t>::min(),
>+    };
>+}
> 
> void testCompareDouble(MacroAssembler::DoubleCondition condition)
> {
>@@ -306,6 +320,24 @@ void testCompareDouble(MacroAssembler::DoubleCondition condition)
>     }
> }
> 
>+void testMul32WithImmediates()
>+{
>+    for (auto immediate : int32Operands()) {
>+        auto mul = compile([=] (CCallHelpers& jit) {
>+            jit.emitFunctionPrologue();
>+
>+            jit.mul32(CCallHelpers::TrustedImm32(immediate), GPRInfo::argumentGPR0, GPRInfo::returnValueGPR);
>+
>+            jit.emitFunctionEpilogue();
>+            jit.ret();
>+        });
>+
>+        for (auto value : int32Operands())
>+            CHECK_EQ(invoke<int>(mul, value), immediate * value);
>+
>+    }
>+}
>+
> #if CPU(X86) || CPU(X86_64) || CPU(ARM64)
> void testCompareFloat(MacroAssembler::DoubleCondition condition)
> {
>@@ -956,6 +988,7 @@ void run(const char* filter)
>     RUN(testCompareDouble(MacroAssembler::DoubleGreaterThanOrEqualOrUnordered));
>     RUN(testCompareDouble(MacroAssembler::DoubleLessThanOrUnordered));
>     RUN(testCompareDouble(MacroAssembler::DoubleLessThanOrEqualOrUnordered));
>+    RUN(testMul32WithImmediates());
> 
> #if CPU(X86) || CPU(X86_64) || CPU(ARM64)
>     RUN(testCompareFloat(MacroAssembler::DoubleEqual));

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