Changeset 36738 in webkit for trunk/JavaScriptCore/masm

Timestamp:

Sep 21, 2008, 3:39:29 AM (17 years ago)

Author:

[email protected]

Message:

2008-09-21 Maciej Stachowiak <​[email protected]>

Reviewed by Oliver.

• speed up === operator by generating inline machine code for the fast paths ​https://bugs.webkit.org/show_bug.cgi?id=20820

• VM/CTI.cpp: (JSC::CTI::emitJumpSlowCaseIfNotImmediateNumber): (JSC::CTI::emitJumpSlowCaseIfNotImmediateNumbers): (JSC::CTI::emitJumpSlowCaseIfNotImmediates): (JSC::CTI::emitTagAsBoolImmediate): (JSC::CTI::privateCompileMainPass): (JSC::CTI::privateCompileSlowCases):
• VM/CTI.h:
• VM/Machine.cpp: (JSC::Machine::cti_op_stricteq):
• masm/X86Assembler.h: (JSC::X86Assembler::): (JSC::X86Assembler::sete_r): (JSC::X86Assembler::setz_r): (JSC::X86Assembler::movzbl_rr): (JSC::X86Assembler::emitUnlinkedJnz):

File:

• trunk/JavaScriptCore/masm/X86Assembler.h (modified) (5 diffs)

trunk/JavaScriptCore/masm/X86Assembler.h

@@ -192 +192 @@
         OP_GROUP1A_Ev                   = 0x8F,
         OP_CDQ                          = 0x99,
+        OP_SETE                         = 0x94,
         OP_GROUP2_EvIb                  = 0xC1,
         OP_RET                          = 0xC3,
@@ -215 +216 @@
         OP2_JLE_rel32   = 0x8E,
         OP2_IMUL_GvEv   = 0xAF,
+        OP2_MOVZX_GvEb  = 0xB6,
         OP2_MOVZX_GvEw  = 0xB7,
 
@@ -385 +387 @@
         m_buffer->putByte(OP_CMP_EvGv);
         emitModRm_rmsib(src, base, index, scale);
+    }
+
+    void sete_r(RegisterID dst)
+    {
+        m_buffer->putByte(OP_2BYTE_ESCAPE);
+        m_buffer->putByte(OP_SETE);
+        m_buffer->putByte(MODRM(3, 0, dst));
+    }
+
+    void setz_r(RegisterID dst)
+    {
+        sete_r(dst);
     }
 
@@ -546 +560 @@
     }
 
+    void movzbl_rr(RegisterID src, RegisterID dst)
+    {
+        m_buffer->putByte(OP_2BYTE_ESCAPE);
+        m_buffer->putByte(OP2_MOVZX_GvEb);
+        emitModRm_rr(dst, src);
+    }
+
     void movzwl_mr(int offset, RegisterID base, RegisterID dst)
     {
@@ -701 +722 @@
     }
     
+    JmpSrc emitUnlinkedJnz()
+    {
+        return emitUnlinkedJne();
+    }
+
     JmpSrc emitUnlinkedJe()
     {