diff options
Diffstat (limited to 'JavaScriptCore/assembler/MacroAssemblerARM.h')
| -rw-r--r-- | JavaScriptCore/assembler/MacroAssemblerARM.h | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/JavaScriptCore/assembler/MacroAssemblerARM.h b/JavaScriptCore/assembler/MacroAssemblerARM.h index 48ddf24..5de8b34 100644 --- a/JavaScriptCore/assembler/MacroAssemblerARM.h +++ b/JavaScriptCore/assembler/MacroAssemblerARM.h @@ -769,7 +769,7 @@ public: bool supportsFloatingPointTruncate() const { - return false; + return s_isVFPPresent; } bool supportsFloatingPointSqrt() const @@ -878,13 +878,17 @@ public: // Truncates 'src' to an integer, and places the resulting 'dest'. // If the result is not representable as a 32 bit value, branch. // May also branch for some values that are representable in 32 bits - // (specifically, in this case, INT_MIN). + // (specifically, in this case, INT_MIN and INT_MAX). Jump branchTruncateDoubleToInt32(FPRegisterID src, RegisterID dest) { - UNUSED_PARAM(src); - UNUSED_PARAM(dest); - ASSERT_NOT_REACHED(); - return jump(); + m_assembler.vcvtr_s32_f64_r(ARMRegisters::SD0 << 1, src); + // If VCVTR.S32.F64 can't fit the result into a 32-bit + // integer, it saturates at INT_MAX or INT_MIN. Testing this is + // probably quicker than testing FPSCR for exception. + m_assembler.vmov_arm_r(dest, ARMRegisters::SD0 << 1); + m_assembler.sub_r(ARMRegisters::S0, dest, ARMAssembler::getOp2(0x80000000)); + m_assembler.cmn_r(ARMRegisters::S0, ARMAssembler::getOp2(1), ARMCondition(NotEqual)); + return Jump(m_assembler.jmp(ARMCondition(Equal))); } // Convert 'src' to an integer, and places the resulting 'dest'. |