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Hi Guys, I am applying the patch below to add support for Intel's second generation XScale architecture, known as iWMMXt or Intel Wireless Multimedia Extensions, to the ARM port. There are a couple of issues with this patch which Richard Earnshaw and I have been discussing, and which I hope to resolve over the next few months. But I did not want to hold back on the patch any longer. (In particular the ABI for the iWMMXt code may change in the future once the ATEPCS is ratified. This may mean supporting the ABI as currently implemented by this patch as well as the proper, official ABI. If this becomes necessary I will take on this role myself). I will also be adding an entry in the 3.4 changes section of the gcc HTML documentation. Cheers Nick gcc/ChangeLog 2003-06-18 Nick Clifton <nickc@redhat.com> * config.gcc: Add an extra_header for ARM targets. Support configuring with --with-cpu=iwmmxt. * doc/invoke.texi: Document new value for -mcpu= ARM switch. * config/arm/aof.h (REGISTER_NAMES): Add iwmmxt register names. Fix formatting. * config/arm/aout.h (REGISTER_NAMES): Add iwmmxt register names. * config/arm/arm-protos.h (arm_emit_vector_const): New prototype. (arm_output_load_gr): New prototype. * config/arm/arm.c (extra_reg_names1): Delete. (TARGET_INIT_BUILTINS, TARGET_EXPAND_BUILTIN, FL_IWMMXT, * arch_is_iwmmxt): Define. (all_cores, all_architecture): Add entry for iwmmxt. (arm_override_options): Add support for iwmmxt. (use_return_insn, arm_function_arg, arm_legitimate_index_p, arm_print_value, arm_rtx_costs_1, output_move_double, arm_compute_save_reg_mask, arm_output_epilogue, arm_get_frame_size, arm_expand_prologue, arm_print_operand, arm_assemble_integer, arm_hard_regno_ok, arm_regno_class): Likewise. (arm_init_cumulative_args): Count iwmmxt registers. (arm_function_ok_for_sibcall): Return false of sibcall_blocked has been set. (struct minipool_node): Add fix_size field. (add_minipool_forward_ref): Add support for 8-byte aligning of the pool. (add_minipool_backward_ref, add_minipool_offsets, dump_minipool, push_minipool_fix): Likewise. (struct builtin_description): New struct. (builtin_description): New array of iwmmxt builtin functions. (arm_init_iwmmxt_builtins): New function. (arm_init_builtins): New function. (safe_vector_operand): New function. (arm_expand_binop_builtin): New function. (arm_expand_unop_builtin): New function. (arm_expand_builtin): New function. (arm_emit_vector_const): New function. (arm_output_load_gr): New function. * config/arm/arm.h (TARGET_CPU_iwmmxt, TARGET_IWMMXT, TARGET_REALLY_IWMMXT, arm_arch_iwmmxt, IWMMXT_ALIGNMENT, TYPE_NEEDS_IWMMXT_ALIGNMENT, ADJUST_FIELD_ALIGN, DATA_ALIGNMENT, LOCAL_ALIGNMENT, VECTOR_MODE_SUPPORTED_P): Define. (BIGGEST_ALIGNMENT): Set to 64 if ATPCS support is enabled. (CPP_CPU_ARCH_SPEC): Add entries for iwmmxt. (FIXED_REGISTERS, CALL_USED_REGISTERS, REG_ALLOC_ORDER, reg_class, REG_CLASS_NAMES, REG_CLASS_CONTENTS, REG_CLASS_FOR_LETTER): Add iwmmxt registers. (SUBTARGET_CONDITIONAL_REGISTER_USAGE): Disable iwmmxt registers unless the iwmmxt target is selected. (FIRST_IWMMXT_GR_REGNUM, LAST_IWMMXT_GR_REGNUM, FIRST_IWMMXT_REGNUM, LAST_IWMMXT_REGNUM, IS_IWMMXT_REGNUM, IS_IWMMXT_GR_REGNUM): Define. (FIRST_PSEUDO_REGISTER): Bump to 63. (struct machine_function): Add sibcall_blocked field. (Struct CUMULATIVE_ARGS): Add iwmmxt_nregs, named_count and nargs fields. (enum arm_builtins): New enum list. * config/arm/arm.md (UNSPEC_WSHUFH, UNSPEC_WACC, UNSPEC_TMOVMSK, UNSPEC_WSAD, UNSPEC_WSADZ, UNSPEC_WMACS, UNSPEC_WMACU, UNSPEC_WMACSZ, UNSPEC_WMACUZ, UNSPEC_CLRDI, UNSPEC_WMADDS, UNSPEC_WMADDU): New unspecs. (VUNSPEC_TMRC, VUNSPEC_TMCR, VUNSPEC_ALIGN8, VUNSPEC_WCMP_EQ, VUNSPEC_WCMP_GTU, VUNSPEC_WCMP_GT): New vunspecs. (movv2si, movv4hi, movv8qi): New expands for vector moves. Include iwmmxt.md. * config/arm/t-xscale-elf (MULTILIB_OPTIONS): Add iwmmxt multilib. (MULTILIB_DIRNAMES, MULTILIB_REDUNDANT_DIRS): Likewise. * config/arm/mmintrin.h: New ARM specific header file. * config/arm/iwmmx.md: New iWMMXt specific machine patterns.
Attachment:
iwmmxt.patch.bz2
Description: Patch to add iWMMXt support to gcc
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