unsigned int EmulateCPDO(const unsigned int opcode) { FPA11 *fpa11 = GET_FPA11(); FPREG *rFd; unsigned int nType, nDest, nRc; struct roundingData roundData; /* Get the destination size. If not valid let Linux perform an invalid instruction trap. */ nDest = getDestinationSize(opcode); if (typeNone == nDest) return 0; roundData.mode = SetRoundingMode(opcode); roundData.precision = SetRoundingPrecision(opcode); roundData.exception = 0; /* Compare the size of the operands in Fn and Fm. Choose the largest size and perform operations in that size, in order to make use of all the precision of the operands. If Fm is a constant, we just grab a constant of a size matching the size of the operand in Fn. */ if (MONADIC_INSTRUCTION(opcode)) nType = nDest; else nType = fpa11->fType[getFn(opcode)]; if (!CONSTANT_FM(opcode)) { register unsigned int Fm = getFm(opcode); if (nType < fpa11->fType[Fm]) { nType = fpa11->fType[Fm]; } } rFd = &fpa11->fpreg[getFd(opcode)]; switch (nType) { case typeSingle: nRc = SingleCPDO(&roundData, opcode, rFd); break; case typeDouble: nRc = DoubleCPDO(&roundData, opcode, rFd); break; #ifdef CONFIG_FPE_NWFPE_XP case typeExtended: nRc = ExtendedCPDO(&roundData, opcode, rFd); break; #endif default: nRc = 0; } /* The CPDO functions used to always set the destination type to be the same as their working size. */ if (nRc != 0) { /* If the operation succeeded, check to see if the result in the destination register is the correct size. If not force it to be. */ fpa11->fType[getFd(opcode)] = nDest; #ifdef CONFIG_FPE_NWFPE_XP if (nDest != nType) { switch (nDest) { case typeSingle: { if (typeDouble == nType) rFd->fSingle = float64_to_float32(&roundData, rFd->fDouble); else rFd->fSingle = floatx80_to_float32(&roundData, rFd->fExtended); } break; case typeDouble: { if (typeSingle == nType) rFd->fDouble = float32_to_float64(rFd->fSingle); else rFd->fDouble = floatx80_to_float64(&roundData, rFd->fExtended); } break; case typeExtended: { if (typeSingle == nType) rFd->fExtended = float32_to_floatx80(rFd->fSingle); else rFd->fExtended = float64_to_floatx80(rFd->fDouble); } break; } } #else if (nDest != nType) { if (nDest == typeSingle) rFd->fSingle = float64_to_float32(&roundData, rFd->fDouble); else rFd->fDouble = float32_to_float64(rFd->fSingle); } #endif } if (roundData.exception) float_raise(roundData.exception); return nRc; }
unsigned int EmulateCPDO(const unsigned int opcode) { FPA11 *fpa11 = GET_FPA11(); unsigned int Fd, nType, nDest, nRc = 1; //printk("EmulateCPDO(0x%08x)\n",opcode); /* Get the destination size. If not valid let Linux perform an invalid instruction trap. */ nDest = getDestinationSize(opcode); if (typeNone == nDest) return 0; SetRoundingMode(opcode); /* Compare the size of the operands in Fn and Fm. Choose the largest size and perform operations in that size, in order to make use of all the precision of the operands. If Fm is a constant, we just grab a constant of a size matching the size of the operand in Fn. */ if (MONADIC_INSTRUCTION(opcode)) nType = nDest; else nType = fpa11->fType[getFn(opcode)]; if (!CONSTANT_FM(opcode)) { register unsigned int Fm = getFm(opcode); if (nType < fpa11->fType[Fm]) { nType = fpa11->fType[Fm]; } } switch (nType) { case typeSingle : nRc = SingleCPDO(opcode); break; case typeDouble : nRc = DoubleCPDO(opcode); break; case typeExtended : nRc = ExtendedCPDO(opcode); break; default : nRc = 0; } /* If the operation succeeded, check to see if the result in the destination register is the correct size. If not force it to be. */ Fd = getFd(opcode); nType = fpa11->fType[Fd]; if ((0 != nRc) && (nDest != nType)) { switch (nDest) { case typeSingle: { if (typeDouble == nType) fpa11->fpreg[Fd].fSingle = float64_to_float32(fpa11->fpreg[Fd].fDouble, &fpa11->fp_status); else fpa11->fpreg[Fd].fSingle = floatx80_to_float32(fpa11->fpreg[Fd].fExtended, &fpa11->fp_status); } break; case typeDouble: { if (typeSingle == nType) fpa11->fpreg[Fd].fDouble = float32_to_float64(fpa11->fpreg[Fd].fSingle, &fpa11->fp_status); else fpa11->fpreg[Fd].fDouble = floatx80_to_float64(fpa11->fpreg[Fd].fExtended, &fpa11->fp_status); } break; case typeExtended: { if (typeSingle == nType) fpa11->fpreg[Fd].fExtended = float32_to_floatx80(fpa11->fpreg[Fd].fSingle, &fpa11->fp_status); else fpa11->fpreg[Fd].fExtended = float64_to_floatx80(fpa11->fpreg[Fd].fDouble, &fpa11->fp_status); } break; } fpa11->fType[Fd] = nDest; } return nRc; }