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Diffstat (limited to 'Modules/_ctypes/libffi/src/bfin/sysv.S')
| -rw-r--r-- | Modules/_ctypes/libffi/src/bfin/sysv.S | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/Modules/_ctypes/libffi/src/bfin/sysv.S b/Modules/_ctypes/libffi/src/bfin/sysv.S deleted file mode 100644 index f4278be242..0000000000 --- a/Modules/_ctypes/libffi/src/bfin/sysv.S +++ /dev/null @@ -1,179 +0,0 @@ -/* ----------------------------------------------------------------------- - sysv.S - Copyright (c) 2012 Alexandre K. I. de Mendonca <alexandre.keunecke@gmail.com>, - Paulo Pizarro <paulo.pizarro@gmail.com> - - Blackfin 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. - ----------------------------------------------------------------------- */ - -#define LIBFFI_ASM -#include <fficonfig.h> -#include <ffi.h> - -.text -.align 4 - - /* - There is a "feature" in the bfin toolchain that it puts a _ before function names - that's why the function here it's called _ffi_call_SYSV and not ffi_call_SYSV - */ - .global _ffi_call_SYSV; - .type _ffi_call_SYSV, STT_FUNC; - .func ffi_call_SYSV - - /* - cif->bytes = R0 (fp+8) - &ecif = R1 (fp+12) - ffi_prep_args = R2 (fp+16) - ret_type = stack (fp+20) - ecif.rvalue = stack (fp+24) - fn = stack (fp+28) - got (fp+32) - - There is room for improvement here (we can use temporary registers - instead of saving the values in the memory) - REGS: - P5 => Stack pointer (function arguments) - R5 => cif->bytes - R4 => ret->type - - FP-20 = P3 - FP-16 = SP (parameters area) - FP-12 = SP (temp) - FP-08 = function return part 1 [R0] - FP-04 = function return part 2 [R1] - */ - -_ffi_call_SYSV: -.prologue: - LINK 20; - [FP-20] = P3; - [FP+8] = R0; - [FP+12] = R1; - [FP+16] = R2; - -.allocate_stack: - //alocate cif->bytes into the stack - R1 = [FP+8]; - R0 = SP; - R0 = R0 - R1; - R1 = 4; - R0 = R0 - R1; - [FP-12] = SP; - SP = R0; - [FP-16] = SP; - -.call_prep_args: - //get the addr of prep_args - P0 = [P3 + _ffi_prep_args@FUNCDESC_GOT17M4]; - P1 = [P0]; - P3 = [P0+4]; - R0 = [FP-16];//SP (parameter area) - R1 = [FP+12];//ecif - call (P1); - -.call_user_function: - //ajust SP so as to allow the user function access the parameters on the stack - SP = [FP-16]; //point to function parameters - R0 = [SP]; - R1 = [SP+4]; - R2 = [SP+8]; - //load user function address - P0 = FP; - P0 +=28; - P1 = [P0]; - P1 = [P1]; - P3 = [P0+4]; - /* - For functions returning aggregate values (struct) occupying more than 8 bytes, - the caller allocates the return value object on the stack and the address - of this object is passed to the callee as a hidden argument in register P0. - */ - P0 = [FP+24]; - - call (P1); - SP = [FP-12]; -.compute_return: - P2 = [FP-20]; - [FP-8] = R0; - [FP-4] = R1; - - R0 = [FP+20]; - R1 = R0 << 2; - - R0 = [P2+.rettable@GOT17M4]; - R0 = R1 + R0; - P2 = R0; - R1 = [P2]; - - P2 = [FP+-20]; - R0 = [P2+.rettable@GOT17M4]; - R0 = R1 + R0; - P2 = R0; - R0 = [FP-8]; - R1 = [FP-4]; - jump (P2); - -/* -#define FFIBFIN_RET_VOID 0 -#define FFIBFIN_RET_BYTE 1 -#define FFIBFIN_RET_HALFWORD 2 -#define FFIBFIN_RET_INT64 3 -#define FFIBFIN_RET_INT32 4 -*/ -.align 4 -.align 4 -.rettable: - .dd .epilogue - .rettable - .dd .rbyte - .rettable; - .dd .rhalfword - .rettable; - .dd .rint64 - .rettable; - .dd .rint32 - .rettable; - -.rbyte: - P0 = [FP+24]; - R0 = R0.B (Z); - [P0] = R0; - JUMP .epilogue -.rhalfword: - P0 = [FP+24]; - R0 = R0.L; - [P0] = R0; - JUMP .epilogue -.rint64: - P0 = [FP+24];// &rvalue - [P0] = R0; - [P0+4] = R1; - JUMP .epilogue -.rint32: - P0 = [FP+24]; - [P0] = R0; -.epilogue: - R0 = [FP+8]; - R1 = [FP+12]; - R2 = [FP+16]; - P3 = [FP-20]; - UNLINK; - RTS; - -.size _ffi_call_SYSV,.-_ffi_call_SYSV; -.endfunc |