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  4.                                                - 1 -
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  8.                     7.3 ANSI C Release Notes
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  69.                                                - 2 -
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  73.                     4.  _N_e_w__F_e_a_t_u_r_e_s
  74.  
  75.                     This chapter lists the new C features for the
  76.                     MIPSpro 7.3 release.
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  80.                     4.1  _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
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  83.                     The -ipa option invokes the Interprocedural
  84.                     Analyzer option group.  This is a new alias for
  85.                     -IPA:=ON.  Compiling with the -ipa and -pca
  86.                     options together instructs the compiler to
  87.                     perform interprocedural parallelization.  The
  88.                     compiler applies a sophisticated analysis to
  89.                     determine when it can parallelize loops with
  90.                     calls.
  91.  
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  93.                     4.2  _L_i_s_t_i_n_g__C_o_n_t_r_o_l
  94.  
  95.                     The -clist option invokes the listing control
  96.                     group.  This is equivalent to -CLIST:=ON.
  97.  
  98.                     The emit_omp=_f_l_a_g suboption to the -CLIST option
  99.                     directs the compiler to use OpenMP(TM)
  100.                     directives (_f_l_a_g=ON) or MIPS(TM) multiprocessing
  101.                     directives (_f_l_a_g=OFF).
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  105.                     4.3  _N_e_w__-_O_P_T__S_u_b_o_p_t_i_o_n
  106.  
  107.                     The speculative_ptr_deref={ON/OFF} suboption to
  108.                     the -OPT compiler option allows speculative
  109.                     loads of memory locations that differ by a small
  110.                     offset from some referenced memory location.
  111.                     For more information, see the opt(5) man page.
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  114.                     4.4  _N_e_w__-_T_E_N_V__S_u_b_o_p_t_i_o_n
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  116.                     The large_got=ON/OFF suboption to the -TENV
  117.                     compiler option replaces the -avoid_gp_overflow
  118.                     and the -xgot options.
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  135.                                                - 3 -
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  139.                     4.5  _N_e_w__#_p_r_a_g_m_a
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  141.                     The unknown_control_flow (_f_u_n_c_1 [, _f_u_n_c_2 ...])
  142.                     #pragma indicates that the procedures listed as
  143.                     _f_u_n_c_1 and _f_u_n_c_2, etc. have a nonstandard control
  144.                     flow behavior.
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  148.                     4.6  _O_p_e_n_M_P _D_i_r_e_c_t_i_v_e_s _f_o_r _S_h_a_r_e_d _M_e_m_o_r_y
  149.                          _M_u_l_t_i_p_r_o_c_e_s_s_i_n_g
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  151.                     These directives are based on the OpenMP C/C++
  152.                     Application Program Interface (API) standard.
  153.                     Programs that use these directives are portable
  154.                     and can be compiled by other compilers that
  155.                     support the OpenMP standard.
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  157.                     To enable recognition of the OpenMP directives,
  158.                     specify -mp on the cc or CC command line.
  159.                     Details of these directives are documented in
  160.                     the _M_I_P_S_p_r_o _C _a_n_d _C++ _P_r_a_g_m_a_s manual.
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  163.                     4.7  _P_a_r_a_l_l_e_l_i_z_a_t_i_o_n__A_n_a_l_y_s_i_s
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  165.                     The -LNO:pure={_f_l_a_g} option tells the compiler
  166.                     how to use the "no side effects" and "pure"
  167.                     pragmas when gathering information about calls
  168.                     for parallelization analysis.
  169.  
  170.                     C language multiprocessor programs are now
  171.                     supported by ProDev ProMP graphical user
  172.                     interface.  (ProDev ProMP was formerly known as
  173.                     WorkShop Pro MPF.)  Among other things, ProDev
  174.                     ProMP lets you see the transformed source
  175.                     alongside the original program source code.
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  181.                     4.8  _S_u_p_e_r_c_o_m_p_u_t_i_n_g__A_P_I__S_u_p_p_o_r_t
  182.  
  183.                     The MIPSpro 7.3 release supports the
  184.                     Supercomputing Application Programming Interface
  185.                     (API), a set of language features and library
  186.                     functions that are implemented across the
  187.                     Silicon Graphics and Cray(TM) product line to
  188.                     meet the application portability needs of high-
  189.                     performance, technical computing customers.  For
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  201.                                                - 4 -
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  205.                     more information, see the online Supercomputing
  206.                     API document at the following URL:
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  208.                     http:/www.sgi.com/software/scapi.html
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  212.                     4.9  _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
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  214.                     The target option group has the following new
  215.                     controls:
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  217.                     dismiss_mem_faults=_f_l_a_g  Forces the kernel to
  218.                                              dismiss memory faults
  219.                                              that occur during
  220.                                              execution.
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  222.                     exc_max=_v_a_l_u_e            _S_p_e_c_i_f_i_e_s _t_h_e _m_a_x_i_m_u_m
  223.                                              _s_e_t _o_f _I_E_E_E-_7_5_4
  224.                                              _f_l_o_a_t_i_n_g _p_o_i_n_t
  225.                                              _e_x_c_e_p_t_i_o_n_s _f_o_r _w_h_i_c_h
  226.                                              _t_r_a_p_s _c_a_n _b_e _e_n_a_b_l_e_d _a_t
  227.                                              _r_u_n _t_i_m_e.
  228.  
  229.                     _e_x_c__m_i_n=_v_a_l_u_e            _S_p_e_c_i_f_i_e_s _t_h_e _m_i_n_i_m_u_m
  230.                                              _s_e_t _o_f _I_E_E_E-_7_5_4
  231.                                              _f_l_o_a_t_i_n_g _p_o_i_n_t
  232.                                              _e_x_c_e_p_t_i_o_n_s _f_o_r _w_h_i_c_h
  233.                                              _t_r_a_p_s _m_u_s_t _b_e _e_n_a_b_l_e_d
  234.                                              _a_t _r_u_n _t_i_m_e.
  235.  
  236.                     _i_s_a=_v_a_l_u_e                _I_d_e_n_t_i_f_i_e_s _t_h_e _t_a_r_g_e_t
  237.                                              _i_n_s_t_r_u_c_t_i_o_n _s_e_t
  238.                                              _a_r_c_h_i_t_e_c_t_u_r_e _f_o_r
  239.                                              _c_o_m_p_i_l_a_t_i_o_n.
  240.  
  241.                     _s_y_n_c=_f_l_a_g                _E_n_a_b_l_e_s _o_r _d_i_s_a_b_l_e_s _t_h_e
  242.                                              _u_s_e _o_f _S_Y_N_C
  243.                                              _i_n_s_t_r_u_c_t_i_o_n_s.
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