1 /* ----------------------------------------------------------------------- 2 arcompact.S - Copyright (c) 2013 Synposys, Inc. (www.synopsys.com) 3 4 ARCompact Foreign Function Interface 5 6 Permission is hereby granted, free of charge, to any person obtaining 7 a copy of this software and associated documentation files (the 8 ``Software''), to deal in the Software without restriction, including 9 without limitation the rights to use, copy, modify, merge, publish, 10 distribute, sublicense, and/or sell copies of the Software, and to 11 permit persons to whom the Software is furnished to do so, subject to 12 the following conditions: 13 14 The above copyright notice and this permission notice shall be included 15 in all copies or substantial portions of the Software. 16 17 THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 20 IN NO EVENT SHALL RENESAS TECHNOLOGY BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 OTHER DEALINGS IN THE SOFTWARE. 24 ----------------------------------------------------------------------- */ 25 26 #define LIBFFI_ASM 27 #include <fficonfig.h> 28 #include <ffi.h> 29 #ifdef HAVE_MACHINE_ASM_H 30 #include <machine/asm.h> 31 #else 32 #define CNAME(x) x 33 #define ENTRY(x) .globl CNAME(x)` .type CNAME(x),%function` CNAME(x): 34 #endif 35 36 .text 37 38 /* R0: ffi_prep_args */ 39 /* R1: &ecif */ 40 /* R2: cif->bytes */ 41 /* R3: fig->flags */ 42 /* R4: ecif.rvalue */ 43 /* R5: fn */ 44 ENTRY(ffi_call_ARCompact) 45 /* Save registers. */ 46 st.a fp, [sp, -4] /* fp + 20, fp */ 47 push_s blink /* fp + 16, blink */ 48 st.a r4, [sp, -4] /* fp + 12, ecif.rvalue */ 49 push_s r3 /* fp + 8, fig->flags */ 50 st.a r5, [sp, -4] /* fp + 4, fn */ 51 push_s r2 /* fp + 0, cif->bytes */ 52 mov fp, sp 53 54 /* Make room for all of the new args. */ 55 sub sp, sp, r2 56 57 /* Place all of the ffi_prep_args in position. */ 58 /* ffi_prep_args(char *stack, extended_cif *ecif) */ 59 /* R1 already set. */ 60 61 /* And call. */ 62 jl_s.d [r0] 63 mov_s r0, sp 64 65 ld.ab r12, [fp, 4] /* cif->bytes */ 66 ld.ab r11, [fp, 4] /* fn */ 67 68 /* Move first 8 parameters in registers... */ 69 ld_s r0, [sp] 70 ld_s r1, [sp, 4] 71 ld_s r2, [sp, 8] 72 ld_s r3, [sp, 12] 73 ld r4, [sp, 16] 74 ld r5, [sp, 20] 75 ld r6, [sp, 24] 76 ld r7, [sp, 28] 77 78 /* ...and adjust the stack. */ 79 min r12, r12, 32 80 81 /* Call the function. */ 82 jl.d [r11] 83 add sp, sp, r12 84 85 mov sp, fp 86 pop_s r3 /* fig->flags, return type */ 87 pop_s r2 /* ecif.rvalue, pointer for return value */ 88 89 /* If the return value pointer is NULL, assume no return value. */ 90 breq.d r2, 0, epilogue 91 pop_s blink 92 93 /* Return INT. */ 94 brne r3, FFI_TYPE_INT, return_double 95 b.d epilogue 96 st_s r0, [r2] 97 98 return_double: 99 brne r3, FFI_TYPE_DOUBLE, epilogue 100 st_s r0, [r2] 101 st_s r1, [r2,4] 102 103 epilogue: 104 j_s.d [blink] 105 ld.ab fp, [sp, 4] 106 107 ENTRY(ffi_closure_ARCompact) 108 st.a r0, [sp, -32] 109 st_s r1, [sp, 4] 110 st_s r2, [sp, 8] 111 st_s r3, [sp, 12] 112 st r4, [sp, 16] 113 st r5, [sp, 20] 114 st r6, [sp, 24] 115 st r7, [sp, 28] 116 117 /* pointer to arguments */ 118 mov_s r2, sp 119 120 /* return value goes here */ 121 sub sp, sp, 8 122 mov_s r1, sp 123 124 push_s blink 125 126 bl.d ffi_closure_inner_ARCompact 127 mov_s r0, r8 /* codeloc, set by trampoline */ 128 129 pop_s blink 130 131 /* set return value to r1:r0 */ 132 pop_s r0 133 pop_s r1 134 j_s.d [blink] 135 add_s sp, sp, 32 136
