git://gcc.gnu.org / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| cc4c8975 KH |
1 | #define LIBFFI_ASM |
| 2 | #include <powerpc/asm.h> | |
| 3 | ||
| 4 | .globl ffi_closure_helper_SYSV | |
| 5 | ||
| 6 | ENTRY(ffi_closure_SYSV) | |
| 7 | stwu %r1,-144(%r1) | |
| 8 | mflr %r0 | |
| 9 | stw %r31,140(%r1) | |
| 10 | stw %r0,148(%r1) | |
| 11 | ||
| 12 | # we want to build up an areas for the parameters passed | |
| 13 | # in registers (both floating point and integer) | |
| 14 | ||
| 15 | # so first save gpr 3 to gpr 10 (aligned to 4) | |
| 16 | stw %r3, 16(%r1) | |
| 17 | stw %r4, 20(%r1) | |
| 18 | stw %r5, 24(%r1) | |
| 19 | stw %r6, 28(%r1) | |
| 20 | stw %r7, 32(%r1) | |
| 21 | stw %r8, 36(%r1) | |
| 22 | stw %r9, 40(%r1) | |
| 23 | stw %r10,44(%r1) | |
| 24 | ||
| 25 | # next save fpr 1 to fpr 8 (aligned to 8) | |
| 26 | stfd %f1, 48(%r1) | |
| 27 | stfd %f2, 56(%r1) | |
| 28 | stfd %f3, 64(%r1) | |
| 29 | stfd %f4, 72(%r1) | |
| 30 | stfd %f5, 80(%r1) | |
| 31 | stfd %f6, 88(%r1) | |
| 32 | stfd %f7, 96(%r1) | |
| 33 | stfd %f8, 104(%r1) | |
| 34 | ||
| 35 | # set up registers for the routine that actually does the work | |
| 36 | # get the context pointer from the trampoline | |
| 37 | mr %r3,%r11 | |
| 38 | ||
| 39 | # now load up the pointer to the result storage | |
| 40 | addi %r4,%r1,112 | |
| 41 | ||
| 42 | # now load up the pointer to the saved gpr registers | |
| 43 | addi %r5,%r1,16 | |
| 44 | ||
| 45 | # now load up the pointer to the saved fpr registers */ | |
| 46 | addi %r6,%r1,48 | |
| 47 | ||
| 48 | # now load up the pointer to the outgoing parameter | |
| 49 | # stack in the previous frame | |
| 50 | # i.e. the previous frame pointer + 8 | |
| 51 | addi %r7,%r1,152 | |
| 52 | ||
| 53 | # make the call | |
| 54 | bl JUMPTARGET(ffi_closure_helper_SYSV) | |
| 55 | ||
| 56 | # now r3 contains the return type | |
| 57 | # so use it to look up in a table | |
| 58 | # so we know how to deal with each type | |
| 59 | ||
| 60 | # look up the proper starting point in table | |
| 61 | # by using return type as offset | |
| 62 | addi %r5,%r1,112 # get pointer to results area | |
| 63 | addis %r4,0,.L60@ha # get address of jump table | |
| 64 | addi %r4,%r4,.L60@l | |
| 65 | slwi %r3,%r3,2 # now multiply return type by 4 | |
| 66 | lwzx %r3,%r4,%r3 # get the contents of that table value | |
| 67 | add %r3,%r3,%r4 # add contents of table to table address | |
| 68 | mtctr %r3 | |
| 69 | bctr # jump to it | |
| 70 | .align 2 | |
| 71 | .L60: | |
| 72 | .long .L44-.L60 # FFI_TYPE_VOID | |
| 73 | .long .L50-.L60 # FFI_TYPE_INT | |
| 74 | .long .L47-.L60 # FFI_TYPE_FLOAT | |
| 75 | .long .L46-.L60 # FFI_TYPE_DOUBLE | |
| 76 | .long .L46-.L60 # FFI_TYPE_LONGDOUBLE | |
| 77 | .long .L56-.L60 # FFI_TYPE_UINT8 | |
| 78 | .long .L55-.L60 # FFI_TYPE_SINT8 | |
| 79 | .long .L58-.L60 # FFI_TYPE_UINT16 | |
| 80 | .long .L57-.L60 # FFI_TYPE_SINT16 | |
| 81 | .long .L50-.L60 # FFI_TYPE_UINT32 | |
| 82 | .long .L50-.L60 # FFI_TYPE_SINT32 | |
| 83 | .long .L48-.L60 # FFI_TYPE_UINT64 | |
| 84 | .long .L48-.L60 # FFI_TYPE_SINT64 | |
| 85 | .long .L44-.L60 # FFI_TYPE_STRUCT | |
| 86 | .long .L50-.L60 # FFI_TYPE_POINTER | |
| 87 | ||
| 88 | ||
| 89 | # case double | |
| 90 | .L46: | |
| 91 | lfd %f1,0(%r5) | |
| 92 | b .L44 | |
| 93 | ||
| 94 | # case float | |
| 95 | .L47: | |
| 96 | lfs %f1,0(%r5) | |
| 97 | b .L44 | |
| 98 | ||
| 99 | # case long long | |
| 100 | .L48: | |
| 101 | lwz %r3,0(%r5) | |
| 102 | lwz %r4,4(%r5) | |
| 103 | b .L44 | |
| 104 | ||
| 105 | # case default / int32 / pointer | |
| 106 | .L50: | |
| 107 | lwz %r3,0(%r5) | |
| 108 | b .L44 | |
| 109 | ||
| 110 | # case signed int8 | |
| 111 | .L55: | |
| 112 | addi %r5,%r5,3 | |
| 113 | lbz %r3,0(%r5) | |
| 114 | extsb %r3,%r3 | |
| 115 | b .L44 | |
| 116 | ||
| 117 | # case unsigned int8 | |
| 118 | .L56: | |
| 119 | addi %r5,%r5,3 | |
| 120 | lbz %r3,0(%r5) | |
| 121 | b .L44 | |
| 122 | ||
| 123 | # case signed int16 | |
| 124 | .L57: | |
| 125 | addi %r5,%r5,2 | |
| 126 | lhz %r3,0(%r5) | |
| 127 | extsh %r3,%r3 | |
| 128 | b .L44 | |
| 129 | ||
| 130 | #case unsigned int16 | |
| 131 | .L58: | |
| 132 | addi %r5,%r5,2 | |
| 133 | lhz %r3,0(%r5) | |
| 134 | ||
| 135 | # case void / done | |
| 136 | .L44: | |
| 137 | ||
| 138 | lwz %r11,0(%r1) | |
| 139 | lwz %r0,4(%r11) | |
| 140 | mtlr %r0 | |
| 141 | lwz %r31,-4(%r11) | |
| 142 | mr %r1,%r11 | |
| 143 | blr | |
| 144 | END(ffi_closure_SYSV) | |
| 145 | ||
| 146 | ||
| 147 | ||
| 148 |