diff options
Diffstat (limited to 'JavaScriptCore/assembler/MacroAssemblerX86Common.h')
| -rw-r--r-- | JavaScriptCore/assembler/MacroAssemblerX86Common.h | 76 |
1 files changed, 72 insertions, 4 deletions
diff --git a/JavaScriptCore/assembler/MacroAssemblerX86Common.h b/JavaScriptCore/assembler/MacroAssemblerX86Common.h index 449df86..7296193 100644 --- a/JavaScriptCore/assembler/MacroAssemblerX86Common.h +++ b/JavaScriptCore/assembler/MacroAssemblerX86Common.h @@ -26,8 +26,6 @@ #ifndef MacroAssemblerX86Common_h #define MacroAssemblerX86Common_h -#include <wtf/Platform.h> - #if ENABLE(ASSEMBLER) #include "X86Assembler.h" @@ -251,6 +249,33 @@ public: { m_assembler.sarl_i8r(imm.m_value, dest); } + + void urshift32(RegisterID shift_amount, RegisterID dest) + { + // On x86 we can only shift by ecx; if asked to shift by another register we'll + // need rejig the shift amount into ecx first, and restore the registers afterwards. + if (shift_amount != X86Registers::ecx) { + swap(shift_amount, X86Registers::ecx); + + // E.g. transform "shrl %eax, %eax" -> "xchgl %eax, %ecx; shrl %ecx, %ecx; xchgl %eax, %ecx" + if (dest == shift_amount) + m_assembler.shrl_CLr(X86Registers::ecx); + // E.g. transform "shrl %eax, %ecx" -> "xchgl %eax, %ecx; shrl %ecx, %eax; xchgl %eax, %ecx" + else if (dest == X86Registers::ecx) + m_assembler.shrl_CLr(shift_amount); + // E.g. transform "shrl %eax, %ebx" -> "xchgl %eax, %ecx; shrl %ecx, %ebx; xchgl %eax, %ecx" + else + m_assembler.shrl_CLr(dest); + + swap(shift_amount, X86Registers::ecx); + } else + m_assembler.shrl_CLr(dest); + } + + void urshift32(Imm32 imm, RegisterID dest) + { + m_assembler.shrl_i8r(imm.m_value, dest); + } void sub32(RegisterID src, RegisterID dest) { @@ -303,6 +328,10 @@ public: m_assembler.xorl_mr(src.offset, src.base, dest); } + void sqrtDouble(FPRegisterID src, FPRegisterID dst) + { + m_assembler.sqrtsd_rr(src, dst); + } // Memory access operations: // @@ -336,6 +365,11 @@ public: { m_assembler.movzwl_mr(address.offset, address.base, address.index, address.scale, dest); } + + void load16(Address address, RegisterID dest) + { + m_assembler.movzwl_mr(address.offset, address.base, dest); + } DataLabel32 store32WithAddressOffsetPatch(RegisterID src, Address address) { @@ -620,6 +654,12 @@ public: // an optional second operand of a mask under which to perform the test. public: + Jump branch8(Condition cond, Address left, Imm32 right) + { + m_assembler.cmpb_im(right.m_value, left.offset, left.base); + return Jump(m_assembler.jCC(x86Condition(cond))); + } + Jump branch32(Condition cond, RegisterID left, RegisterID right) { m_assembler.cmpl_rr(right, left); @@ -717,6 +757,26 @@ public: m_assembler.testl_i32m(mask.m_value, address.offset, address.base, address.index, address.scale); return Jump(m_assembler.jCC(x86Condition(cond))); } + + Jump branchTest8(Condition cond, Address address, Imm32 mask = Imm32(-1)) + { + ASSERT((cond == Zero) || (cond == NonZero)); + if (mask.m_value == -1) + m_assembler.cmpb_im(0, address.offset, address.base); + else + m_assembler.testb_im(mask.m_value, address.offset, address.base); + return Jump(m_assembler.jCC(x86Condition(cond))); + } + + Jump branchTest8(Condition cond, BaseIndex address, Imm32 mask = Imm32(-1)) + { + ASSERT((cond == Zero) || (cond == NonZero)); + if (mask.m_value == -1) + m_assembler.cmpb_im(0, address.offset, address.base, address.index, address.scale); + else + m_assembler.testb_im(mask.m_value, address.offset, address.base, address.index, address.scale); + return Jump(m_assembler.jCC(x86Condition(cond))); + } Jump jump() { @@ -836,6 +896,13 @@ public: return Jump(m_assembler.jCC(x86Condition(cond))); } + Jump branchNeg32(Condition cond, RegisterID srcDest) + { + ASSERT((cond == Overflow) || (cond == Zero) || (cond == NonZero)); + neg32(srcDest); + return Jump(m_assembler.jCC(x86Condition(cond))); + } + Jump branchOr32(Condition cond, RegisterID src, RegisterID dest) { ASSERT((cond == Signed) || (cond == Zero) || (cond == NonZero)); @@ -917,10 +984,11 @@ public: void setTest8(Condition cond, Address address, Imm32 mask, RegisterID dest) { if (mask.m_value == -1) - m_assembler.cmpl_im(0, address.offset, address.base); + m_assembler.cmpb_im(0, address.offset, address.base); else - m_assembler.testl_i32m(mask.m_value, address.offset, address.base); + m_assembler.testb_im(mask.m_value, address.offset, address.base); m_assembler.setCC_r(x86Condition(cond), dest); + m_assembler.movzbl_rr(dest, dest); } void setTest32(Condition cond, Address address, Imm32 mask, RegisterID dest) |