void BX_CPP_AttrRegparmN(1) BX_CPU_C::FISTP_QWORD_INTEGER(bxInstruction_c *i) { #if BX_SUPPORT_FPU BX_CPU_THIS_PTR prepareFPU(i); Bit64s save_reg = int64_indefinite; /* The masked response */ clear_C1(); if (IS_TAG_EMPTY(0)) { BX_CPU_THIS_PTR FPU_exception(FPU_EX_Stack_Underflow); if (! (BX_CPU_THIS_PTR the_i387.is_IA_masked())) return; } else { float_status_t status = FPU_pre_exception_handling(BX_CPU_THIS_PTR the_i387.get_control_word()); save_reg = floatx80_to_int64(BX_READ_FPU_REG(0), status); if (BX_CPU_THIS_PTR FPU_exception(status.float_exception_flags)) return; } write_virtual_qword(i->seg(), RMAddr(i), (Bit64u)(save_reg)); BX_CPU_THIS_PTR the_i387.FPU_pop(); #else BX_INFO(("FISTP_QWORD_INTEGER: required FPU, configure --enable-fpu")); #endif }
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FISTP_QWORD_INTEGER(bxInstruction_c *i) { BX_CPU_THIS_PTR prepareFPU(i); RMAddr(i) = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); FPU_update_last_instruction(i); Bit16u x87_sw = FPU_PARTIAL_STATUS; Bit64s save_reg = int64_indefinite; /* The masked response */ clear_C1(); if (IS_TAG_EMPTY(0)) { FPU_exception(FPU_EX_Stack_Underflow); if (! BX_CPU_THIS_PTR the_i387.is_IA_masked()) BX_NEXT_INSTR(i); } else { float_status_t status = FPU_pre_exception_handling(BX_CPU_THIS_PTR the_i387.get_control_word()); save_reg = floatx80_to_int64(BX_READ_FPU_REG(0), status); if (FPU_exception(status.float_exception_flags, 1)) BX_NEXT_INSTR(i); } // store to the memory might generate an exception, in this case origial FPU_SW must be kept swap_values16u(x87_sw, FPU_PARTIAL_STATUS); write_virtual_qword(i->seg(), RMAddr(i), (Bit64u)(save_reg)); FPU_PARTIAL_STATUS = x87_sw; BX_CPU_THIS_PTR the_i387.FPU_pop(); BX_NEXT_INSTR(i); }
void BX_CPP_AttrRegparmN(1) BX_CPU_C::FBSTP_PACKED_BCD(bxInstruction_c *i) { #if BX_SUPPORT_FPU BX_CPU_THIS_PTR prepareFPU(i); /* * The packed BCD integer indefinite encoding (FFFFC000000000000000H) * is stored in response to a masked floating-point invalid-operation * exception. */ Bit16u save_reg_hi = 0xFFFF; Bit64u save_reg_lo = BX_CONST64(0xC000000000000000); clear_C1(); if (IS_TAG_EMPTY(0)) { BX_CPU_THIS_PTR FPU_exception(FPU_EX_Stack_Underflow); if (! (BX_CPU_THIS_PTR the_i387.is_IA_masked())) return; } else { float_status_t status = FPU_pre_exception_handling(BX_CPU_THIS_PTR the_i387.get_control_word()); floatx80 reg = BX_READ_FPU_REG(0); Bit64s save_val = floatx80_to_int64(reg, status); int sign = (reg.exp & 0x8000) != 0; if (sign) save_val = -save_val; if (save_val > BX_CONST64(999999999999999999)) { float_raise(status, float_flag_invalid); } if (! (status.float_exception_flags & float_flag_invalid)) { save_reg_hi = (sign) ? 0x8000 : 0; save_reg_lo = 0; for (int i=0; i<16; i++) { save_reg_lo += ((Bit64u)(save_val % 10)) << (4*i); save_val /= 10; } save_reg_hi += (Bit16u)(save_val % 10); save_val /= 10; save_reg_hi += (Bit16u)(save_val % 10) << 4; } /* check for fpu arithmetic exceptions */ if (BX_CPU_THIS_PTR FPU_exception(status.float_exception_flags)) return; } // write packed bcd to memory write_virtual_qword(i->seg(), RMAddr(i), save_reg_lo); write_virtual_word (i->seg(), RMAddr(i) + 8, save_reg_hi); BX_CPU_THIS_PTR the_i387.FPU_pop(); #else BX_INFO(("FBSTP_PACKED_BCD: required FPU, configure --enable-fpu")); #endif }
BX_INSF_TYPE BX_CPP_AttrRegparmN(1) BX_CPU_C::FBSTP_PACKED_BCD(bxInstruction_c *i) { BX_CPU_THIS_PTR prepareFPU(i); RMAddr(i) = BX_CPU_CALL_METHODR(i->ResolveModrm, (i)); FPU_update_last_instruction(i); Bit16u x87_sw = FPU_PARTIAL_STATUS; /* * The packed BCD integer indefinite encoding (FFFFC000000000000000H) * is stored in response to a masked floating-point invalid-operation * exception. */ Bit16u save_reg_hi = 0xFFFF; Bit64u save_reg_lo = BX_CONST64(0xC000000000000000); clear_C1(); if (IS_TAG_EMPTY(0)) { FPU_exception(FPU_EX_Stack_Underflow); if (! BX_CPU_THIS_PTR the_i387.is_IA_masked()) BX_NEXT_INSTR(i); } else { float_status_t status = FPU_pre_exception_handling(BX_CPU_THIS_PTR the_i387.get_control_word()); floatx80 reg = BX_READ_FPU_REG(0); Bit64s save_val = floatx80_to_int64(reg, status); int sign = (reg.exp & 0x8000) != 0; if (sign) save_val = -save_val; if (save_val > BX_CONST64(999999999999999999)) { status.float_exception_flags = float_flag_invalid; // throw away other flags } if (! (status.float_exception_flags & float_flag_invalid)) { save_reg_hi = (sign) ? 0x8000 : 0; save_reg_lo = 0; for (int i=0; i<16; i++) { save_reg_lo += ((Bit64u)(save_val % 10)) << (4*i); save_val /= 10; } save_reg_hi += (Bit16u)(save_val % 10); save_val /= 10; save_reg_hi += (Bit16u)(save_val % 10) << 4; } /* check for fpu arithmetic exceptions */ if (FPU_exception(status.float_exception_flags, 1)) BX_NEXT_INSTR(i); } // store to the memory might generate an exception, in this case origial FPU_SW must be kept swap_values16u(x87_sw, FPU_PARTIAL_STATUS); // write packed bcd to memory write_virtual_qword(i->seg(), RMAddr(i), save_reg_lo); write_virtual_word(i->seg(), (RMAddr(i) + 8) & i->asize_mask(), save_reg_hi); FPU_PARTIAL_STATUS = x87_sw; BX_CPU_THIS_PTR the_i387.FPU_pop(); BX_NEXT_INSTR(i); }