IRIX Base Documentation 2002 November

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- 1 - 7.3 FORTRAN 77 Release Notes - 2 - 4. _N_e_w__F_e_a_t_u_r_e_s This chapter lists the FORTRAN 77 enhancements for the MIPSpro 7.3 release. These enhancements are available only when the -craylibs option is used on the compiler command line. 4.1 _N_e_w__C_o_m_p_i_l_e_r__O_p_t_i_o_n_s The following sections describe new compiler options. 4.1.1 _S_t_a_t_i_c__V_a_r_i_a_b_l_e_s The -static_thread_private option converts common blocks to taskcommon blocks, allowing each processor to have a private copy of saved variables. 4.1.2 _I_n_t_e_r_p_r_o_c_e_d_u_r_a_l__P_a_r_a_l_l_e_l_i_z_a_t_i_o_n The -ipa option invokes the Interprocedural Analyzer option group. This is a new alias for -IPA:=ON. Compiling with the -ipa and -pfa options together instructs the compiler to perform interprocedural parallelization. The compiler applies a sophisticated analysis to determine when it can parallelize loops with calls. 4.1.3 _L_i_s_t_i_n_g__C_o_n_t_r_o_l The -flist option invokes the Fortran listing control group. This is equivalent to -FLIST:=ON. The emit_omp=_f_l_a_g suboption to the -FLIST option directs the compiler to use OpenMP(TM) directives (_f_l_a_g=ON) or MIPS(TM) multiprocessing directives (_f_l_a_g=OFF). 4.1.4 _N_e_w__-_O_P_T__S_u_b_o_p_t_i_o_n The speculative_ptr_deref={ON/OFF} suboption to the -OPT compiler option allows speculative loads of memory locations that differ by a small - 3 - offset from some referenced memory location. For more information, see the opt(5) man page. 4.1.5 _T_a_r_g_e_t__O_p_t_i_o_n__G_r_o_u_p__C_o_n_t_r_o_l_s The target option group has the following new controls: dismiss_mem_faults=_f_l_a_g Forces the kernel to dismiss memory faults that occur during execution. exc_max=_v_a_l_u_e Specifies the maximum set of IEEE-754 floating point exceptions for which traps can be enabled at run time. exc_min=_v_a_l_u_e Specifies the minimum set of IEEE-754 floating point exceptions for which traps must be enabled at run time. isa=_v_a_l_u_e Identifies the target instruction set architecture for compilation. sync=_f_l_a_g Enables or disables the use of SYNC instructions. 4.1.6 _-_T_E_N_V__S_u_b_o_p_t_i_o_n The large_got=ON/OFF suboption to the -TENV compiler option replaces the -avoid_gp_overflow and the -xgot options. - 4 - 4.2 _N_e_w__C_o_m_m_a_n_d_s__a_n_d__R_o_u_t_i_n_e_s The following sections describe new commands and routines for the MIPSpro 7.3 FORTRAN 77 compiler. 4.2.1 _D_a_t_a__C_o_p_y_i_n_g__U_t_i_l_i_t_y The fdcp(1) command is now available on IRIX systems. This utility copies data and record structure from input to output. For more details, see the fdcp(1) man page. 4.2.2 _F_o_r_t_r_a_n__P_X_F__R_o_u_t_i_n_e_s The following Fortran PXF interface routines are now available, although not yet documented: PXFAINTGET PXFAINTSET PXFCLOSE PXFDUP PXFDUP2 PXFEINTGET PXFEINTSET PXFGETISPEED PXFGETOSPEED PXFLSEEK PXFMKFIFO PXFSETISPEED PXFSETOSPEED PXFTCFLOW PXFTCFLUSH PXFTCGETATTR PXFTCGETPGRP PXFTCSENDBREAK PXFTCSETATTR PXFTCSETATTR PXFTCSETPGRP PXFSYSTEM PXFWRITE 4.2.3 _U_s_e_r_-_C_a_l_l_a_b_l_e__C_o_n_v_e_r_s_i_o_n__R_o_u_t_i_n_e_s The following user-callable conversion routines are now available: - 5 - MIPS2IEG and IEG2MIPS Conversion between generic IEEE data types and MIPS IEEE data types MIPS2VAX and VAX2MIPS Conversion between VAX(TM) data types and MIPS data types 4.3 _N_e_w__a_s_s_i_g_n__C_o_m_m_a_n_d__O_p_t_i_o_n_s The following sections describe new options for the assign command. 4.3.1 _D_a_t_a__C_o_n_v_e_r_s_i_o_n__O_p_t_i_o_n_s The following data conversion options are now available on the assign command: +o -N ieee_64 +o -N ieee_le +o -N vax 4.3.2 _F_F_I_O__L_a_y_e_r_s The assign command now accepts the -F global option for global layers, the -F tmf option for tape layers, and the -F vms option for VAX/VMS files. 4.3.3 _N_A_M_E_L_I_S_T _a_n_d _L_i_s_t-_D_i_r_e_c_t_e_d _I/_O _E_n_h_a_n_c_e_m_e_n_t_s Comments that begin with an exclamation point (!) are now recognized in NAMELIST input records. For more information, see the assign command (-Y on/off option). New options (-y, -S, -W, and -U) on the assign command control the NAMELIST and list-directed output statements. - 6 - 4.4 _O_t_h_e_r__N_e_w__F_e_a_t_u_r_e_s The following sections describe other new FORTRAN 77 features. 4.4.1 _E_d_i_t__D_e_s_c_r_i_p_t_o_r__C_h_a_n_g_e_s The following edit descriptor features are now supported: +o The backslash (\) is now recognized as another carriage control indicator, as a synonym for the dollar sign ($). +o The Q edit descriptor now returns the number of characters left in a formatted record. +o An empty or zero field width is now a legal value in data edit descriptors such as I, B, O, Z, D, E, F, G, and L. This feature includes some MIPS FORTRAN 77 extensions that came from VAX Fortran. These are now pseudo standards. 4.4.2 _N_e_g_a_t_i_v_e__F_l_o_a_t_i_n_g__P_o_i_n_t__Z_e_r_o A negative floating point zero (-0.0) is now recognized for IEEE floating point systems. The minus sign is suppressed. 4.4.3 _S_u_p_e_r_c_o_m_p_u_t_i_n_g__A_P_I__S_u_p_p_o_r_t The MIPSpro 7.3 release supports the Supercomputing Application Programming Interface (API), a set of language features and library functions that are implemented across the Silicon Graphics and Cray(TM) product line to meet the application portability needs of high- performance, technical computing customers. For more information, see the online Supercomputing API document at the following URL: http:/www.sgi.com/software/scapi.html - 7 - 4.4.4 _S_u_p_p_o_r_t__f_o_r__F_O_R_M_=_S_Y_S_T_E_M Support has been added for FORM="SYSTEM" in OPEN and INQUIRE statements.