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Diffstat (limited to 'Modules/_ctypes/libffi/src/tile/ffi.c')
| -rw-r--r-- | Modules/_ctypes/libffi/src/tile/ffi.c | 355 |
1 files changed, 0 insertions, 355 deletions
diff --git a/Modules/_ctypes/libffi/src/tile/ffi.c b/Modules/_ctypes/libffi/src/tile/ffi.c deleted file mode 100644 index 3a94469c7f..0000000000 --- a/Modules/_ctypes/libffi/src/tile/ffi.c +++ /dev/null @@ -1,355 +0,0 @@ -/* ----------------------------------------------------------------------- - ffi.c - Copyright (c) 2012 Tilera Corp. - - TILE Foreign Function Interface - - Permission is hereby granted, free of charge, to any person obtaining - a copy of this software and associated documentation files (the - ``Software''), to deal in the Software without restriction, including - without limitation the rights to use, copy, modify, merge, publish, - distribute, sublicense, and/or sell copies of the Software, and to - permit persons to whom the Software is furnished to do so, subject to - the following conditions: - - The above copyright notice and this permission notice shall be included - in all copies or substantial portions of the Software. - - THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, - EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF - MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND - NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT - HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, - WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER - DEALINGS IN THE SOFTWARE. - ----------------------------------------------------------------------- */ - -#include <ffi.h> -#include <ffi_common.h> -#include <stdlib.h> -#include <stdint.h> -#include <unistd.h> -#include <arch/abi.h> -#include <arch/icache.h> -#include <arch/opcode.h> - - -/* The first 10 registers are used to pass arguments and return values. */ -#define NUM_ARG_REGS 10 - -/* Performs a raw function call with the given NUM_ARG_REGS register arguments - and the specified additional stack arguments (if any). */ -extern void ffi_call_tile(ffi_sarg reg_args[NUM_ARG_REGS], - const ffi_sarg *stack_args, - size_t stack_args_bytes, - void (*fnaddr)(void)) - FFI_HIDDEN; - -/* This handles the raw call from the closure stub, cleaning up the - parameters and delegating to ffi_closure_tile_inner. */ -extern void ffi_closure_tile(void) FFI_HIDDEN; - - -ffi_status -ffi_prep_cif_machdep(ffi_cif *cif) -{ - /* We always allocate room for all registers. Even if we don't - use them as parameters, they get returned in the same array - as struct return values so we need to make room. */ - if (cif->bytes < NUM_ARG_REGS * FFI_SIZEOF_ARG) - cif->bytes = NUM_ARG_REGS * FFI_SIZEOF_ARG; - - if (cif->rtype->size > NUM_ARG_REGS * FFI_SIZEOF_ARG) - cif->flags = FFI_TYPE_STRUCT; - else - cif->flags = FFI_TYPE_INT; - - /* Nothing to do. */ - return FFI_OK; -} - - -static long -assign_to_ffi_arg(ffi_sarg *out, void *in, const ffi_type *type, - int write_to_reg) -{ - switch (type->type) - { - case FFI_TYPE_SINT8: - *out = *(SINT8 *)in; - return 1; - - case FFI_TYPE_UINT8: - *out = *(UINT8 *)in; - return 1; - - case FFI_TYPE_SINT16: - *out = *(SINT16 *)in; - return 1; - - case FFI_TYPE_UINT16: - *out = *(UINT16 *)in; - return 1; - - case FFI_TYPE_SINT32: - case FFI_TYPE_UINT32: -#ifndef __LP64__ - case FFI_TYPE_POINTER: -#endif - /* Note that even unsigned 32-bit quantities are sign extended - on tilegx when stored in a register. */ - *out = *(SINT32 *)in; - return 1; - - case FFI_TYPE_FLOAT: -#ifdef __tilegx__ - if (write_to_reg) - { - /* Properly sign extend the value. */ - union { float f; SINT32 s32; } val; - val.f = *(float *)in; - *out = val.s32; - } - else -#endif - { - *(float *)out = *(float *)in; - } - return 1; - - case FFI_TYPE_SINT64: - case FFI_TYPE_UINT64: - case FFI_TYPE_DOUBLE: -#ifdef __LP64__ - case FFI_TYPE_POINTER: -#endif - *(UINT64 *)out = *(UINT64 *)in; - return sizeof(UINT64) / FFI_SIZEOF_ARG; - - case FFI_TYPE_STRUCT: - memcpy(out, in, type->size); - return (type->size + FFI_SIZEOF_ARG - 1) / FFI_SIZEOF_ARG; - - case FFI_TYPE_VOID: - /* Must be a return type. Nothing to do. */ - return 0; - - default: - FFI_ASSERT(0); - return -1; - } -} - - -void -ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue) -{ - ffi_sarg * const arg_mem = alloca(cif->bytes); - ffi_sarg * const reg_args = arg_mem; - ffi_sarg * const stack_args = ®_args[NUM_ARG_REGS]; - ffi_sarg *argp = arg_mem; - ffi_type ** const arg_types = cif->arg_types; - const long num_args = cif->nargs; - long i; - - if (cif->flags == FFI_TYPE_STRUCT) - { - /* Pass a hidden pointer to the return value. We make sure there - is scratch space for the callee to store the return value even if - our caller doesn't care about it. */ - *argp++ = (intptr_t)(rvalue ? rvalue : alloca(cif->rtype->size)); - - /* No more work needed to return anything. */ - rvalue = NULL; - } - - for (i = 0; i < num_args; i++) - { - ffi_type *type = arg_types[i]; - void * const arg_in = avalue[i]; - ptrdiff_t arg_word = argp - arg_mem; - -#ifndef __tilegx__ - /* Doubleword-aligned values are always in an even-number register - pair, or doubleword-aligned stack slot if out of registers. */ - long align = arg_word & (type->alignment > FFI_SIZEOF_ARG); - argp += align; - arg_word += align; -#endif - - if (type->type == FFI_TYPE_STRUCT) - { - const size_t arg_size_in_words = - (type->size + FFI_SIZEOF_ARG - 1) / FFI_SIZEOF_ARG; - - if (arg_word < NUM_ARG_REGS && - arg_word + arg_size_in_words > NUM_ARG_REGS) - { - /* Args are not allowed to span registers and the stack. */ - argp = stack_args; - } - - memcpy(argp, arg_in, type->size); - argp += arg_size_in_words; - } - else - { - argp += assign_to_ffi_arg(argp, arg_in, arg_types[i], 1); - } - } - - /* Actually do the call. */ - ffi_call_tile(reg_args, stack_args, - cif->bytes - (NUM_ARG_REGS * FFI_SIZEOF_ARG), fn); - - if (rvalue != NULL) - assign_to_ffi_arg(rvalue, reg_args, cif->rtype, 0); -} - - -/* Template code for closure. */ -extern const UINT64 ffi_template_tramp_tile[] FFI_HIDDEN; - - -ffi_status -ffi_prep_closure_loc (ffi_closure *closure, - ffi_cif *cif, - void (*fun)(ffi_cif*, void*, void**, void*), - void *user_data, - void *codeloc) -{ -#ifdef __tilegx__ - /* TILE-Gx */ - SINT64 c; - SINT64 h; - int s; - UINT64 *out; - - if (cif->abi != FFI_UNIX) - return FFI_BAD_ABI; - - out = (UINT64 *)closure->tramp; - - c = (intptr_t)closure; - h = (intptr_t)ffi_closure_tile; - s = 0; - - /* Find the smallest shift count that doesn't lose information - (i.e. no need to explicitly insert high bits of the address that - are just the sign extension of the low bits). */ - while ((c >> s) != (SINT16)(c >> s) || (h >> s) != (SINT16)(h >> s)) - s += 16; - -#define OPS(a, b, shift) \ - (create_Imm16_X0((a) >> (shift)) | create_Imm16_X1((b) >> (shift))) - - /* Emit the moveli. */ - *out++ = ffi_template_tramp_tile[0] | OPS(c, h, s); - for (s -= 16; s >= 0; s -= 16) - *out++ = ffi_template_tramp_tile[1] | OPS(c, h, s); - -#undef OPS - - *out++ = ffi_template_tramp_tile[2]; - -#else - /* TILEPro */ - UINT64 *out; - intptr_t delta; - - if (cif->abi != FFI_UNIX) - return FFI_BAD_ABI; - - out = (UINT64 *)closure->tramp; - delta = (intptr_t)ffi_closure_tile - (intptr_t)codeloc; - - *out++ = ffi_template_tramp_tile[0] | create_JOffLong_X1(delta >> 3); -#endif - - closure->cif = cif; - closure->fun = fun; - closure->user_data = user_data; - - invalidate_icache(closure->tramp, (char *)out - closure->tramp, - getpagesize()); - - return FFI_OK; -} - - -/* This is called by the assembly wrapper for closures. This does - all of the work. On entry reg_args[0] holds the values the registers - had when the closure was invoked. On return reg_args[1] holds the register - values to be returned to the caller (many of which may be garbage). */ -void FFI_HIDDEN -ffi_closure_tile_inner(ffi_closure *closure, - ffi_sarg reg_args[2][NUM_ARG_REGS], - ffi_sarg *stack_args) -{ - ffi_cif * const cif = closure->cif; - void ** const avalue = alloca(cif->nargs * sizeof(void *)); - void *rvalue; - ffi_type ** const arg_types = cif->arg_types; - ffi_sarg * const reg_args_in = reg_args[0]; - ffi_sarg * const reg_args_out = reg_args[1]; - ffi_sarg * argp; - long i, arg_word, nargs = cif->nargs; - /* Use a union to guarantee proper alignment for double. */ - union { ffi_sarg arg[NUM_ARG_REGS]; double d; UINT64 u64; } closure_ret; - - /* Start out reading register arguments. */ - argp = reg_args_in; - - /* Copy the caller's structure return address to that the closure - returns the data directly to the caller. */ - if (cif->flags == FFI_TYPE_STRUCT) - { - /* Return by reference via hidden pointer. */ - rvalue = (void *)(intptr_t)*argp++; - arg_word = 1; - } - else - { - /* Return the value in registers. */ - rvalue = &closure_ret; - arg_word = 0; - } - - /* Grab the addresses of the arguments. */ - for (i = 0; i < nargs; i++) - { - ffi_type * const type = arg_types[i]; - const size_t arg_size_in_words = - (type->size + FFI_SIZEOF_ARG - 1) / FFI_SIZEOF_ARG; - -#ifndef __tilegx__ - /* Doubleword-aligned values are always in an even-number register - pair, or doubleword-aligned stack slot if out of registers. */ - long align = arg_word & (type->alignment > FFI_SIZEOF_ARG); - argp += align; - arg_word += align; -#endif - - if (arg_word == NUM_ARG_REGS || - (arg_word < NUM_ARG_REGS && - arg_word + arg_size_in_words > NUM_ARG_REGS)) - { - /* Switch to reading arguments from the stack. */ - argp = stack_args; - arg_word = NUM_ARG_REGS; - } - - avalue[i] = argp; - argp += arg_size_in_words; - arg_word += arg_size_in_words; - } - - /* Invoke the closure. */ - closure->fun(cif, rvalue, avalue, closure->user_data); - - if (cif->flags != FFI_TYPE_STRUCT) - { - /* Canonicalize for register representation. */ - assign_to_ffi_arg(reg_args_out, &closure_ret, cif->rtype, 1); - } -} |