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Diffstat (limited to 'gcc-4.9/gcc/config/m32r/m32r-opts.h')
-rw-r--r-- | gcc-4.9/gcc/config/m32r/m32r-opts.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/config/m32r/m32r-opts.h b/gcc-4.9/gcc/config/m32r/m32r-opts.h new file mode 100644 index 000000000..db9886f08 --- /dev/null +++ b/gcc-4.9/gcc/config/m32r/m32r-opts.h @@ -0,0 +1,108 @@ +/* Definitions for option handling for Renesas M32R cpu. + Copyright (C) 1996-2014 Free Software Foundation, Inc. + + This file is part of GCC. + + GCC is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published + by the Free Software Foundation; either version 3, or (at your + option) any later version. + + GCC is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public + License for more details. + + You should have received a copy of the GNU General Public License + along with GCC; see the file COPYING3. If not see + <http://www.gnu.org/licenses/>. */ + +#ifndef M32R_OPTS_H +#define M32R_OPTS_H + +/* Code Models + + Code models are used to select between two choices of two separate + possibilities (address space size, call insn to use): + + small: addresses use 24 bits, use bl to make calls + medium: addresses use 32 bits, use bl to make calls (*1) + large: addresses use 32 bits, use seth/add3/jl to make calls (*2) + + The fourth is "addresses use 24 bits, use seth/add3/jl to make calls" but + using this one doesn't make much sense. + + (*1) The linker may eventually be able to relax seth/add3 -> ld24. + (*2) The linker may eventually be able to relax seth/add3/jl -> bl. + + Internally these are recorded as TARGET_ADDR{24,32} and + TARGET_CALL{26,32}. + + The __model__ attribute can be used to select the code model to use when + accessing particular objects. */ + +enum m32r_model { M32R_MODEL_SMALL, M32R_MODEL_MEDIUM, M32R_MODEL_LARGE }; + +#define TARGET_MODEL_SMALL (m32r_model_selected == M32R_MODEL_SMALL) +#define TARGET_MODEL_MEDIUM (m32r_model_selected == M32R_MODEL_MEDIUM) +#define TARGET_MODEL_LARGE (m32r_model_selected == M32R_MODEL_LARGE) +#define TARGET_ADDR24 (m32r_model_selected == M32R_MODEL_SMALL) +#define TARGET_ADDR32 (! TARGET_ADDR24) +#define TARGET_CALL26 (! TARGET_CALL32) +#define TARGET_CALL32 (m32r_model_selected == M32R_MODEL_LARGE) + +/* The default is the small model. */ +#ifndef M32R_MODEL_DEFAULT +#define M32R_MODEL_DEFAULT M32R_MODEL_SMALL +#endif + +/* Small Data Area + + The SDA consists of sections .sdata, .sbss, and .scommon. + .scommon isn't a real section, symbols in it have their section index + set to SHN_M32R_SCOMMON, though support for it exists in the linker script. + + Two switches control the SDA: + + -G NNN - specifies the maximum size of variable to go in the SDA + + -msdata=foo - specifies how such variables are handled + + -msdata=none - small data area is disabled + + -msdata=sdata - small data goes in the SDA, special code isn't + generated to use it, and special relocs aren't + generated + + -msdata=use - small data goes in the SDA, special code is generated + to use the SDA and special relocs are generated + + The SDA is not multilib'd, it isn't necessary. + MULTILIB_EXTRA_OPTS is set in tmake_file to -msdata=sdata so multilib'd + libraries have small data in .sdata/SHN_M32R_SCOMMON so programs that use + -msdata=use will successfully link with them (references in header files + will cause the compiler to emit code that refers to library objects in + .data). ??? There can be a problem if the user passes a -G value greater + than the default and a library object in a header file is that size. + The default is 8 so this should be rare - if it occurs the user + is required to rebuild the libraries or use a smaller value for -G. */ + +/* Maximum size of variables that go in .sdata/.sbss. + The -msdata=foo switch also controls how small variables are handled. */ +#ifndef SDATA_DEFAULT_SIZE +#define SDATA_DEFAULT_SIZE 8 +#endif + +enum m32r_sdata { M32R_SDATA_NONE, M32R_SDATA_SDATA, M32R_SDATA_USE }; + +#define TARGET_SDATA_NONE (m32r_sdata_selected == M32R_SDATA_NONE) +#define TARGET_SDATA_SDATA (m32r_sdata_selected == M32R_SDATA_SDATA) +#define TARGET_SDATA_USE (m32r_sdata_selected == M32R_SDATA_USE) + +/* Default is to disable the SDA + [for upward compatibility with previous toolchains]. */ +#ifndef M32R_SDATA_DEFAULT +#define M32R_SDATA_DEFAULT M32R_SDATA_NONE +#endif + +#endif |