diff options
Diffstat (limited to 'libsyscalls_get_integer_alignment.c')
| -rw-r--r-- | libsyscalls_get_integer_alignment.c | 69 |
1 files changed, 11 insertions, 58 deletions
diff --git a/libsyscalls_get_integer_alignment.c b/libsyscalls_get_integer_alignment.c index 1c2d10e..f13f40f 100644 --- a/libsyscalls_get_integer_alignment.c +++ b/libsyscalls_get_integer_alignment.c @@ -4,73 +4,26 @@ #include "generated/integers.c" +#define X(ARCH, CHARBITS, INTPTR_BITS, SIZE_BITS, INTMAX_ALIGN, ENDIAN, SIGN) [ARCH] = INTMAX_ALIGN +static const unsigned char aligntable[] = {LIST_ARCH_SPECS(X, COMMA)}; +#undef X + enum libsyscalls_error -libsyscalls_get_integer_alignment(enum libsyscalls_os os, enum libsyscalls_arch arch, unsigned width_in_bits, unsigned *alignment_out) +libsyscalls_get_integer_alignment(enum libsyscalls_os os, enum libsyscalls_arch arch, + unsigned width_in_bits, unsigned *alignment_out) { unsigned maxalign; if (!width_in_bits) return LIBSYSCALLS_E_INVAL; - switch ((int)arch) { - case LIBSYSCALLS_ARCH_M68K: /* https://m680x0.github.io/doc/abi.html#scalar-types - * https://lists.nongnu.org/archive/html/qemu-devel/2015-02/msg04797.html */ - maxalign = 16; - break; - - case LIBSYSCALLS_ARCH_I386: - case LIBSYSCALLS_ARCH_ARM_OABI_LE: /* https://wiki.debian.org/ArmEabiPort#A64-bit_data_type_alignment */ - case LIBSYSCALLS_ARCH_ARM_OABI_BE: - case LIBSYSCALLS_ARCH_SH_LE: /* https://www.st.com/resource/en/reference_manual/rm0197-sh4-generic-and-c-specific-application-binary-interface-stmicroelectronics.pdf (page 12) */ - case LIBSYSCALLS_ARCH_SH_BE: - case LIBSYSCALLS_ARCH_MICROBLAZE_32_LE: /* https://www.ecb.torontomu.ca/~courses/ee8205/Data-Sheets/sopc/MicroBlaze_DataSheet.pdf */ - case LIBSYSCALLS_ARCH_MICROBLAZE_32_BE: - maxalign = 32; - break; - - case LIBSYSCALLS_ARCH_AMD64: - case LIBSYSCALLS_ARCH_AMD64_X32: - case LIBSYSCALLS_ARCH_ARM_EABI_LE: /* https://wiki.debian.org/ArmEabiPort#A64-bit_data_type_alignment */ - case LIBSYSCALLS_ARCH_ARM_EABI_BE: - case LIBSYSCALLS_ARCH_ALPHA_LE: /* https://static.lwn.net/images/pdf/LDD3/ch11.pdf */ - case LIBSYSCALLS_ARCH_ALPHA_BE: - case LIBSYSCALLS_ARCH_IA64_LE: /* https://static.lwn.net/images/pdf/LDD3/ch11.pdf */ - case LIBSYSCALLS_ARCH_IA64_BE: - case LIBSYSCALLS_ARCH_IA64_P32_LE: - case LIBSYSCALLS_ARCH_IA64_P32_BE: - case LIBSYSCALLS_ARCH_MIPS_O32_LE: /* https://static.lwn.net/images/pdf/LDD3/ch11.pdf */ - case LIBSYSCALLS_ARCH_MIPS_O32_BE: - case LIBSYSCALLS_ARCH_MIPS_N32_LE: /* https://s3-eu-west-1.amazonaws.com/downloads-mips/documents/MD00083-2B-MIPS64INT-AFP-05.04.pdf (page 40) */ - case LIBSYSCALLS_ARCH_MIPS_N32_BE: - case LIBSYSCALLS_ARCH_MIPS_N64_LE: - case LIBSYSCALLS_ARCH_MIPS_N64_BE: - case LIBSYSCALLS_ARCH_PARISC_32: /* https://www.ece.lsu.edu/ee4720/doc/pa1.1.pdf (page 26) */ - case LIBSYSCALLS_ARCH_PARISC_64: - case LIBSYSCALLS_ARCH_POWERPC_32_LE: /* https://static.lwn.net/images/pdf/LDD3/ch11.pdf */ - case LIBSYSCALLS_ARCH_POWERPC_32_BE: - case LIBSYSCALLS_ARCH_POWERPC_64_LE: /* https://www.slac.stanford.edu/exp/npa/software/eabi_app.pdf */ - case LIBSYSCALLS_ARCH_POWERPC_64_BE: - case LIBSYSCALLS_ARCH_POWERPC_NOSPU_LE: - case LIBSYSCALLS_ARCH_POWERPC_NOSPU_BE: - case LIBSYSCALLS_ARCH_POWERPC_SPU_LE: - case LIBSYSCALLS_ARCH_POWERPC_SPU_BE: - case LIBSYSCALLS_ARCH_S390_32: /* https://refspecs.linuxbase.org/ELF/zSeries/lzsabi0_s390.html */ - case LIBSYSCALLS_ARCH_S390_64: - case LIBSYSCALLS_ARCH_SPARC_32: /* https://www.gaisler.com/doc/sparcv8.pdf (page 46) */ - case LIBSYSCALLS_ARCH_SPARC_64_LE: /* https://static.lwn.net/images/pdf/LDD3/ch11.pdf */ - case LIBSYSCALLS_ARCH_SPARC_64_BE: - case LIBSYSCALLS_ARCH_XTENSA_LE: /* https://loboris.eu/ESP32/Xtensa_lx%20Overview%20handbook.pdf (page 97) */ - case LIBSYSCALLS_ARCH_XTENSA_BE: - case LIBSYSCALLS_ARCH_MICROBLAZE_64_LE: /* https://www.amd.com/content/dam/xilinx/support/documents/sw_manuals/xilinx2021_2/ug984-vivado-microblaze-ref.pdf */ - case LIBSYSCALLS_ARCH_MICROBLAZE_64_BE: - maxalign = 64; - break; - - default: + if ((size_t)arch >= ELEMSOF(aligntable)) + return LIBSYSCALLS_E_ARCHNOSUP; + maxalign = aligntable[(size_t)arch]; + if (!maxalign) return LIBSYSCALLS_E_ARCHNOSUP; - } - if (width_in_bits & (width_in_bits - 1) || width_in_bits & 7 || width_in_bits > 64) + if (IS_NOT_2POW(width_in_bits) || width_in_bits % 8 || width_in_bits > 64) return LIBSYSCALLS_E_NOSUCHTYPE; *alignment_out = width_in_bits < maxalign ? width_in_bits : maxalign; |