diff options
Diffstat (limited to 'Modules/_ctypes/libffi/src/ia64/ffi.c')
| -rw-r--r-- | Modules/_ctypes/libffi/src/ia64/ffi.c | 586 |
1 files changed, 0 insertions, 586 deletions
diff --git a/Modules/_ctypes/libffi/src/ia64/ffi.c b/Modules/_ctypes/libffi/src/ia64/ffi.c deleted file mode 100644 index b77a836ddc..0000000000 --- a/Modules/_ctypes/libffi/src/ia64/ffi.c +++ /dev/null @@ -1,586 +0,0 @@ -/* ----------------------------------------------------------------------- - ffi.c - Copyright (c) 1998, 2007, 2008, 2012 Red Hat, Inc. - Copyright (c) 2000 Hewlett Packard Company - Copyright (c) 2011 Anthony Green - - IA64 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 <stdbool.h> -#include <float.h> - -#include "ia64_flags.h" - -/* A 64-bit pointer value. In LP64 mode, this is effectively a plain - pointer. In ILP32 mode, it's a pointer that's been extended to - 64 bits by "addp4". */ -typedef void *PTR64 __attribute__((mode(DI))); - -/* Memory image of fp register contents. This is the implementation - specific format used by ldf.fill/stf.spill. All we care about is - that it wants a 16 byte aligned slot. */ -typedef struct -{ - UINT64 x[2] __attribute__((aligned(16))); -} fpreg; - - -/* The stack layout given to ffi_call_unix and ffi_closure_unix_inner. */ - -struct ia64_args -{ - fpreg fp_regs[8]; /* Contents of 8 fp arg registers. */ - UINT64 gp_regs[8]; /* Contents of 8 gp arg registers. */ - UINT64 other_args[]; /* Arguments passed on stack, variable size. */ -}; - - -/* Adjust ADDR, a pointer to an 8 byte slot, to point to the low LEN bytes. */ - -static inline void * -endian_adjust (void *addr, size_t len) -{ -#ifdef __BIG_ENDIAN__ - return addr + (8 - len); -#else - return addr; -#endif -} - -/* Store VALUE to ADDR in the current cpu implementation's fp spill format. - This is a macro instead of a function, so that it works for all 3 floating - point types without type conversions. Type conversion to long double breaks - the denorm support. */ - -#define stf_spill(addr, value) \ - asm ("stf.spill %0 = %1%P0" : "=m" (*addr) : "f"(value)); - -/* Load a value from ADDR, which is in the current cpu implementation's - fp spill format. As above, this must also be a macro. */ - -#define ldf_fill(result, addr) \ - asm ("ldf.fill %0 = %1%P1" : "=f"(result) : "m"(*addr)); - -/* Return the size of the C type associated with with TYPE. Which will - be one of the FFI_IA64_TYPE_HFA_* values. */ - -static size_t -hfa_type_size (int type) -{ - switch (type) - { - case FFI_IA64_TYPE_HFA_FLOAT: - return sizeof(float); - case FFI_IA64_TYPE_HFA_DOUBLE: - return sizeof(double); - case FFI_IA64_TYPE_HFA_LDOUBLE: - return sizeof(__float80); - default: - abort (); - } -} - -/* Load from ADDR a value indicated by TYPE. Which will be one of - the FFI_IA64_TYPE_HFA_* values. */ - -static void -hfa_type_load (fpreg *fpaddr, int type, void *addr) -{ - switch (type) - { - case FFI_IA64_TYPE_HFA_FLOAT: - stf_spill (fpaddr, *(float *) addr); - return; - case FFI_IA64_TYPE_HFA_DOUBLE: - stf_spill (fpaddr, *(double *) addr); - return; - case FFI_IA64_TYPE_HFA_LDOUBLE: - stf_spill (fpaddr, *(__float80 *) addr); - return; - default: - abort (); - } -} - -/* Load VALUE into ADDR as indicated by TYPE. Which will be one of - the FFI_IA64_TYPE_HFA_* values. */ - -static void -hfa_type_store (int type, void *addr, fpreg *fpaddr) -{ - switch (type) - { - case FFI_IA64_TYPE_HFA_FLOAT: - { - float result; - ldf_fill (result, fpaddr); - *(float *) addr = result; - break; - } - case FFI_IA64_TYPE_HFA_DOUBLE: - { - double result; - ldf_fill (result, fpaddr); - *(double *) addr = result; - break; - } - case FFI_IA64_TYPE_HFA_LDOUBLE: - { - __float80 result; - ldf_fill (result, fpaddr); - *(__float80 *) addr = result; - break; - } - default: - abort (); - } -} - -/* Is TYPE a struct containing floats, doubles, or extended doubles, - all of the same fp type? If so, return the element type. Return - FFI_TYPE_VOID if not. */ - -static int -hfa_element_type (ffi_type *type, int nested) -{ - int element = FFI_TYPE_VOID; - - switch (type->type) - { - case FFI_TYPE_FLOAT: - /* We want to return VOID for raw floating-point types, but the - synthetic HFA type if we're nested within an aggregate. */ - if (nested) - element = FFI_IA64_TYPE_HFA_FLOAT; - break; - - case FFI_TYPE_DOUBLE: - /* Similarly. */ - if (nested) - element = FFI_IA64_TYPE_HFA_DOUBLE; - break; - - case FFI_TYPE_LONGDOUBLE: - /* Similarly, except that that HFA is true for double extended, - but not quad precision. Both have sizeof == 16, so tell the - difference based on the precision. */ - if (LDBL_MANT_DIG == 64 && nested) - element = FFI_IA64_TYPE_HFA_LDOUBLE; - break; - - case FFI_TYPE_STRUCT: - { - ffi_type **ptr = &type->elements[0]; - - for (ptr = &type->elements[0]; *ptr ; ptr++) - { - int sub_element = hfa_element_type (*ptr, 1); - if (sub_element == FFI_TYPE_VOID) - return FFI_TYPE_VOID; - - if (element == FFI_TYPE_VOID) - element = sub_element; - else if (element != sub_element) - return FFI_TYPE_VOID; - } - } - break; - - default: - return FFI_TYPE_VOID; - } - - return element; -} - - -/* Perform machine dependent cif processing. */ - -ffi_status -ffi_prep_cif_machdep(ffi_cif *cif) -{ - int flags; - - /* Adjust cif->bytes to include space for the bits of the ia64_args frame - that precedes the integer register portion. The estimate that the - generic bits did for the argument space required is good enough for the - integer component. */ - cif->bytes += offsetof(struct ia64_args, gp_regs[0]); - if (cif->bytes < sizeof(struct ia64_args)) - cif->bytes = sizeof(struct ia64_args); - - /* Set the return type flag. */ - flags = cif->rtype->type; - switch (cif->rtype->type) - { - case FFI_TYPE_LONGDOUBLE: - /* Leave FFI_TYPE_LONGDOUBLE as meaning double extended precision, - and encode quad precision as a two-word integer structure. */ - if (LDBL_MANT_DIG != 64) - flags = FFI_IA64_TYPE_SMALL_STRUCT | (16 << 8); - break; - - case FFI_TYPE_STRUCT: - { - size_t size = cif->rtype->size; - int hfa_type = hfa_element_type (cif->rtype, 0); - - if (hfa_type != FFI_TYPE_VOID) - { - size_t nelts = size / hfa_type_size (hfa_type); - if (nelts <= 8) - flags = hfa_type | (size << 8); - } - else - { - if (size <= 32) - flags = FFI_IA64_TYPE_SMALL_STRUCT | (size << 8); - } - } - break; - - default: - break; - } - cif->flags = flags; - - return FFI_OK; -} - -extern int ffi_call_unix (struct ia64_args *, PTR64, void (*)(void), UINT64); - -void -ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue) -{ - struct ia64_args *stack; - long i, avn, gpcount, fpcount; - ffi_type **p_arg; - - FFI_ASSERT (cif->abi == FFI_UNIX); - - /* If we have no spot for a return value, make one. */ - if (rvalue == NULL && cif->rtype->type != FFI_TYPE_VOID) - rvalue = alloca (cif->rtype->size); - - /* Allocate the stack frame. */ - stack = alloca (cif->bytes); - - gpcount = fpcount = 0; - avn = cif->nargs; - for (i = 0, p_arg = cif->arg_types; i < avn; i++, p_arg++) - { - switch ((*p_arg)->type) - { - case FFI_TYPE_SINT8: - stack->gp_regs[gpcount++] = *(SINT8 *)avalue[i]; - break; - case FFI_TYPE_UINT8: - stack->gp_regs[gpcount++] = *(UINT8 *)avalue[i]; - break; - case FFI_TYPE_SINT16: - stack->gp_regs[gpcount++] = *(SINT16 *)avalue[i]; - break; - case FFI_TYPE_UINT16: - stack->gp_regs[gpcount++] = *(UINT16 *)avalue[i]; - break; - case FFI_TYPE_SINT32: - stack->gp_regs[gpcount++] = *(SINT32 *)avalue[i]; - break; - case FFI_TYPE_UINT32: - stack->gp_regs[gpcount++] = *(UINT32 *)avalue[i]; - break; - case FFI_TYPE_SINT64: - case FFI_TYPE_UINT64: - stack->gp_regs[gpcount++] = *(UINT64 *)avalue[i]; - break; - - case FFI_TYPE_POINTER: - stack->gp_regs[gpcount++] = (UINT64)(PTR64) *(void **)avalue[i]; - break; - - case FFI_TYPE_FLOAT: - if (gpcount < 8 && fpcount < 8) - stf_spill (&stack->fp_regs[fpcount++], *(float *)avalue[i]); - { - UINT32 tmp; - memcpy (&tmp, avalue[i], sizeof (UINT32)); - stack->gp_regs[gpcount++] = tmp; - } - break; - - case FFI_TYPE_DOUBLE: - if (gpcount < 8 && fpcount < 8) - stf_spill (&stack->fp_regs[fpcount++], *(double *)avalue[i]); - memcpy (&stack->gp_regs[gpcount++], avalue[i], sizeof (UINT64)); - break; - - case FFI_TYPE_LONGDOUBLE: - if (gpcount & 1) - gpcount++; - if (LDBL_MANT_DIG == 64 && gpcount < 8 && fpcount < 8) - stf_spill (&stack->fp_regs[fpcount++], *(__float80 *)avalue[i]); - memcpy (&stack->gp_regs[gpcount], avalue[i], 16); - gpcount += 2; - break; - - case FFI_TYPE_STRUCT: - { - size_t size = (*p_arg)->size; - size_t align = (*p_arg)->alignment; - int hfa_type = hfa_element_type (*p_arg, 0); - - FFI_ASSERT (align <= 16); - if (align == 16 && (gpcount & 1)) - gpcount++; - - if (hfa_type != FFI_TYPE_VOID) - { - size_t hfa_size = hfa_type_size (hfa_type); - size_t offset = 0; - size_t gp_offset = gpcount * 8; - - while (fpcount < 8 - && offset < size - && gp_offset < 8 * 8) - { - hfa_type_load (&stack->fp_regs[fpcount], hfa_type, - avalue[i] + offset); - offset += hfa_size; - gp_offset += hfa_size; - fpcount += 1; - } - } - - memcpy (&stack->gp_regs[gpcount], avalue[i], size); - gpcount += (size + 7) / 8; - } - break; - - default: - abort (); - } - } - - ffi_call_unix (stack, rvalue, fn, cif->flags); -} - -/* Closures represent a pair consisting of a function pointer, and - some user data. A closure is invoked by reinterpreting the closure - as a function pointer, and branching to it. Thus we can make an - interpreted function callable as a C function: We turn the - interpreter itself, together with a pointer specifying the - interpreted procedure, into a closure. - - For IA64, function pointer are already pairs consisting of a code - pointer, and a gp pointer. The latter is needed to access global - variables. Here we set up such a pair as the first two words of - the closure (in the "trampoline" area), but we replace the gp - pointer with a pointer to the closure itself. We also add the real - gp pointer to the closure. This allows the function entry code to - both retrieve the user data, and to restore the correct gp pointer. */ - -extern void ffi_closure_unix (); - -ffi_status -ffi_prep_closure_loc (ffi_closure* closure, - ffi_cif* cif, - void (*fun)(ffi_cif*,void*,void**,void*), - void *user_data, - void *codeloc) -{ - /* The layout of a function descriptor. A C function pointer really - points to one of these. */ - struct ia64_fd - { - UINT64 code_pointer; - UINT64 gp; - }; - - struct ffi_ia64_trampoline_struct - { - UINT64 code_pointer; /* Pointer to ffi_closure_unix. */ - UINT64 fake_gp; /* Pointer to closure, installed as gp. */ - UINT64 real_gp; /* Real gp value. */ - }; - - struct ffi_ia64_trampoline_struct *tramp; - struct ia64_fd *fd; - - if (cif->abi != FFI_UNIX) - return FFI_BAD_ABI; - - tramp = (struct ffi_ia64_trampoline_struct *)closure->tramp; - fd = (struct ia64_fd *)(void *)ffi_closure_unix; - - tramp->code_pointer = fd->code_pointer; - tramp->real_gp = fd->gp; - tramp->fake_gp = (UINT64)(PTR64)codeloc; - closure->cif = cif; - closure->user_data = user_data; - closure->fun = fun; - - return FFI_OK; -} - - -UINT64 -ffi_closure_unix_inner (ffi_closure *closure, struct ia64_args *stack, - void *rvalue, void *r8) -{ - ffi_cif *cif; - void **avalue; - ffi_type **p_arg; - long i, avn, gpcount, fpcount; - - cif = closure->cif; - avn = cif->nargs; - avalue = alloca (avn * sizeof (void *)); - - /* If the structure return value is passed in memory get that location - from r8 so as to pass the value directly back to the caller. */ - if (cif->flags == FFI_TYPE_STRUCT) - rvalue = r8; - - gpcount = fpcount = 0; - for (i = 0, p_arg = cif->arg_types; i < avn; i++, p_arg++) - { - switch ((*p_arg)->type) - { - case FFI_TYPE_SINT8: - case FFI_TYPE_UINT8: - avalue[i] = endian_adjust(&stack->gp_regs[gpcount++], 1); - break; - case FFI_TYPE_SINT16: - case FFI_TYPE_UINT16: - avalue[i] = endian_adjust(&stack->gp_regs[gpcount++], 2); - break; - case FFI_TYPE_SINT32: - case FFI_TYPE_UINT32: - avalue[i] = endian_adjust(&stack->gp_regs[gpcount++], 4); - break; - case FFI_TYPE_SINT64: - case FFI_TYPE_UINT64: - avalue[i] = &stack->gp_regs[gpcount++]; - break; - case FFI_TYPE_POINTER: - avalue[i] = endian_adjust(&stack->gp_regs[gpcount++], sizeof(void*)); - break; - - case FFI_TYPE_FLOAT: - if (gpcount < 8 && fpcount < 8) - { - fpreg *addr = &stack->fp_regs[fpcount++]; - float result; - avalue[i] = addr; - ldf_fill (result, addr); - *(float *)addr = result; - } - else - avalue[i] = endian_adjust(&stack->gp_regs[gpcount], 4); - gpcount++; - break; - - case FFI_TYPE_DOUBLE: - if (gpcount < 8 && fpcount < 8) - { - fpreg *addr = &stack->fp_regs[fpcount++]; - double result; - avalue[i] = addr; - ldf_fill (result, addr); - *(double *)addr = result; - } - else - avalue[i] = &stack->gp_regs[gpcount]; - gpcount++; - break; - - case FFI_TYPE_LONGDOUBLE: - if (gpcount & 1) - gpcount++; - if (LDBL_MANT_DIG == 64 && gpcount < 8 && fpcount < 8) - { - fpreg *addr = &stack->fp_regs[fpcount++]; - __float80 result; - avalue[i] = addr; - ldf_fill (result, addr); - *(__float80 *)addr = result; - } - else - avalue[i] = &stack->gp_regs[gpcount]; - gpcount += 2; - break; - - case FFI_TYPE_STRUCT: - { - size_t size = (*p_arg)->size; - size_t align = (*p_arg)->alignment; - int hfa_type = hfa_element_type (*p_arg, 0); - - FFI_ASSERT (align <= 16); - if (align == 16 && (gpcount & 1)) - gpcount++; - - if (hfa_type != FFI_TYPE_VOID) - { - size_t hfa_size = hfa_type_size (hfa_type); - size_t offset = 0; - size_t gp_offset = gpcount * 8; - void *addr = alloca (size); - - avalue[i] = addr; - - while (fpcount < 8 - && offset < size - && gp_offset < 8 * 8) - { - hfa_type_store (hfa_type, addr + offset, - &stack->fp_regs[fpcount]); - offset += hfa_size; - gp_offset += hfa_size; - fpcount += 1; - } - - if (offset < size) - memcpy (addr + offset, (char *)stack->gp_regs + gp_offset, - size - offset); - } - else - avalue[i] = &stack->gp_regs[gpcount]; - - gpcount += (size + 7) / 8; - } - break; - - default: - abort (); - } - } - - closure->fun (cif, rvalue, avalue, closure->user_data); - - return cif->flags; -} |