/* -----------------------------------------------------------------------
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sysv.h - Copyright (c) 2003 Jakub Jelinek <jakub@redhat.com>
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Copyright (c) 2008 Red Hat, Inc.
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PowerPC64 Assembly glue.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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``Software''), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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----------------------------------------------------------------------- */
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#define LIBFFI_ASM
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#include <fficonfig.h>
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#include <ffi.h>
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.file "linux64_closure.S"
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#ifdef POWERPC64
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FFI_HIDDEN (ffi_closure_LINUX64)
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.globl ffi_closure_LINUX64
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# if _CALL_ELF == 2
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.text
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ffi_closure_LINUX64:
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addis %r2, %r12, .TOC.-ffi_closure_LINUX64@ha
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addi %r2, %r2, .TOC.-ffi_closure_LINUX64@l
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.localentry ffi_closure_LINUX64, . - ffi_closure_LINUX64
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# else
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.section ".opd","aw"
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.align 3
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ffi_closure_LINUX64:
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# ifdef _CALL_LINUX
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.quad .L.ffi_closure_LINUX64,.TOC.@tocbase,0
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.type ffi_closure_LINUX64,@function
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.text
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.L.ffi_closure_LINUX64:
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# else
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FFI_HIDDEN (.ffi_closure_LINUX64)
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.globl .ffi_closure_LINUX64
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.quad .ffi_closure_LINUX64,.TOC.@tocbase,0
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.size ffi_closure_LINUX64,24
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.type .ffi_closure_LINUX64,@function
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.text
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.ffi_closure_LINUX64:
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# endif
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# endif
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# if _CALL_ELF == 2
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# 32 byte special reg save area + 64 byte parm save area
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# + 64 byte retval area + 13*8 fpr save area + round to 16
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# define STACKFRAME 272
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# define PARMSAVE 32
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# define RETVAL PARMSAVE+64
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# else
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# 48 bytes special reg save area + 64 bytes parm save area
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# + 16 bytes retval area + 13*8 bytes fpr save area + round to 16
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# define STACKFRAME 240
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# define PARMSAVE 48
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# define RETVAL PARMSAVE+64
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# endif
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.LFB1:
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# if _CALL_ELF == 2
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ld %r12, FFI_TRAMPOLINE_SIZE(%r11) # closure->cif
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mflr %r0
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lwz %r12, 28(%r12) # cif->flags
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mtcrf 0x40, %r12
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addi %r12, %r1, PARMSAVE
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bt 7, .Lparmsave
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# Our caller has not allocated a parameter save area.
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# We need to allocate one here and use it to pass gprs to
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# ffi_closure_helper_LINUX64.
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addi %r12, %r1, -STACKFRAME+PARMSAVE
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.Lparmsave:
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std %r0, 16(%r1)
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# Save general regs into parm save area
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std %r3, 0(%r12)
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std %r4, 8(%r12)
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std %r5, 16(%r12)
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std %r6, 24(%r12)
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std %r7, 32(%r12)
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std %r8, 40(%r12)
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std %r9, 48(%r12)
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std %r10, 56(%r12)
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# load up the pointer to the parm save area
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mr %r5, %r12
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# else
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# copy r2 to r11 and load TOC into r2
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mr %r11, %r2
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ld %r2, 16(%r11)
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mflr %r0
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# Save general regs into parm save area
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# This is the parameter save area set up by our caller.
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std %r3, PARMSAVE+0(%r1)
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std %r4, PARMSAVE+8(%r1)
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std %r5, PARMSAVE+16(%r1)
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std %r6, PARMSAVE+24(%r1)
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std %r7, PARMSAVE+32(%r1)
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std %r8, PARMSAVE+40(%r1)
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std %r9, PARMSAVE+48(%r1)
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std %r10, PARMSAVE+56(%r1)
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std %r0, 16(%r1)
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# load up the pointer to the parm save area
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addi %r5, %r1, PARMSAVE
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# endif
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# next save fpr 1 to fpr 13
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stfd %f1, -104+(0*8)(%r1)
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stfd %f2, -104+(1*8)(%r1)
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stfd %f3, -104+(2*8)(%r1)
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stfd %f4, -104+(3*8)(%r1)
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stfd %f5, -104+(4*8)(%r1)
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stfd %f6, -104+(5*8)(%r1)
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stfd %f7, -104+(6*8)(%r1)
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stfd %f8, -104+(7*8)(%r1)
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stfd %f9, -104+(8*8)(%r1)
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stfd %f10, -104+(9*8)(%r1)
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stfd %f11, -104+(10*8)(%r1)
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stfd %f12, -104+(11*8)(%r1)
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stfd %f13, -104+(12*8)(%r1)
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# load up the pointer to the saved fpr registers */
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addi %r6, %r1, -104
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# load up the pointer to the result storage
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addi %r4, %r1, -STACKFRAME+RETVAL
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stdu %r1, -STACKFRAME(%r1)
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.LCFI0:
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# get the context pointer from the trampoline
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mr %r3, %r11
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# make the call
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# if defined _CALL_LINUX || _CALL_ELF == 2
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bl ffi_closure_helper_LINUX64
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# else
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bl .ffi_closure_helper_LINUX64
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# endif
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.Lret:
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# now r3 contains the return type
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# so use it to look up in a table
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# so we know how to deal with each type
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# look up the proper starting point in table
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# by using return type as offset
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ld %r0, STACKFRAME+16(%r1)
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cmpldi %r3, FFI_V2_TYPE_SMALL_STRUCT
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bge .Lsmall
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mflr %r4 # move address of .Lret to r4
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sldi %r3, %r3, 4 # now multiply return type by 16
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addi %r4, %r4, .Lret_type0 - .Lret
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add %r3, %r3, %r4 # add contents of table to table address
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mtctr %r3
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bctr # jump to it
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# Each of the ret_typeX code fragments has to be exactly 16 bytes long
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# (4 instructions). For cache effectiveness we align to a 16 byte boundary
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# first.
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.align 4
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.Lret_type0:
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# case FFI_TYPE_VOID
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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nop
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# case FFI_TYPE_INT
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# ifdef __LITTLE_ENDIAN__
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lwa %r3, RETVAL+0(%r1)
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# else
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lwa %r3, RETVAL+4(%r1)
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# endif
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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# case FFI_TYPE_FLOAT
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lfs %f1, RETVAL+0(%r1)
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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# case FFI_TYPE_DOUBLE
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lfd %f1, RETVAL+0(%r1)
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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# case FFI_TYPE_LONGDOUBLE
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lfd %f1, RETVAL+0(%r1)
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mtlr %r0
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lfd %f2, RETVAL+8(%r1)
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b .Lfinish
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# case FFI_TYPE_UINT8
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# ifdef __LITTLE_ENDIAN__
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lbz %r3, RETVAL+0(%r1)
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# else
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lbz %r3, RETVAL+7(%r1)
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# endif
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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# case FFI_TYPE_SINT8
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# ifdef __LITTLE_ENDIAN__
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lbz %r3, RETVAL+0(%r1)
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# else
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lbz %r3, RETVAL+7(%r1)
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# endif
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extsb %r3,%r3
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mtlr %r0
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b .Lfinish
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# case FFI_TYPE_UINT16
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# ifdef __LITTLE_ENDIAN__
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lhz %r3, RETVAL+0(%r1)
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# else
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lhz %r3, RETVAL+6(%r1)
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# endif
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mtlr %r0
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.Lfinish:
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addi %r1, %r1, STACKFRAME
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blr
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# case FFI_TYPE_SINT16
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# ifdef __LITTLE_ENDIAN__
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lha %r3, RETVAL+0(%r1)
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# else
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lha %r3, RETVAL+6(%r1)
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# endif
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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# case FFI_TYPE_UINT32
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# ifdef __LITTLE_ENDIAN__
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lwz %r3, RETVAL+0(%r1)
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# else
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lwz %r3, RETVAL+4(%r1)
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# endif
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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# case FFI_TYPE_SINT32
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# ifdef __LITTLE_ENDIAN__
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lwa %r3, RETVAL+0(%r1)
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# else
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lwa %r3, RETVAL+4(%r1)
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# endif
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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# case FFI_TYPE_UINT64
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ld %r3, RETVAL+0(%r1)
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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# case FFI_TYPE_SINT64
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ld %r3, RETVAL+0(%r1)
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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# case FFI_TYPE_STRUCT
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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nop
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# case FFI_TYPE_POINTER
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ld %r3, RETVAL+0(%r1)
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mtlr %r0
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addi %r1, %r1, STACKFRAME
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blr
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# case FFI_V2_TYPE_FLOAT_HOMOG
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lfs %f1, RETVAL+0(%r1)
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lfs %f2, RETVAL+4(%r1)
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lfs %f3, RETVAL+8(%r1)
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b .Lmorefloat
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# case FFI_V2_TYPE_DOUBLE_HOMOG
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lfd %f1, RETVAL+0(%r1)
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lfd %f2, RETVAL+8(%r1)
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lfd %f3, RETVAL+16(%r1)
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lfd %f4, RETVAL+24(%r1)
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mtlr %r0
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lfd %f5, RETVAL+32(%r1)
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lfd %f6, RETVAL+40(%r1)
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lfd %f7, RETVAL+48(%r1)
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lfd %f8, RETVAL+56(%r1)
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addi %r1, %r1, STACKFRAME
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blr
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.Lmorefloat:
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lfs %f4, RETVAL+12(%r1)
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mtlr %r0
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lfs %f5, RETVAL+16(%r1)
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lfs %f6, RETVAL+20(%r1)
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lfs %f7, RETVAL+24(%r1)
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lfs %f8, RETVAL+28(%r1)
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addi %r1, %r1, STACKFRAME
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blr
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.Lsmall:
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# ifdef __LITTLE_ENDIAN__
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ld %r3,RETVAL+0(%r1)
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mtlr %r0
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ld %r4,RETVAL+8(%r1)
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addi %r1, %r1, STACKFRAME
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blr
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# else
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# A struct smaller than a dword is returned in the low bits of r3
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# ie. right justified. Larger structs are passed left justified
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# in r3 and r4. The return value area on the stack will have
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# the structs as they are usually stored in memory.
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cmpldi %r3, FFI_V2_TYPE_SMALL_STRUCT + 7 # size 8 bytes?
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neg %r5, %r3
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ld %r3,RETVAL+0(%r1)
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blt .Lsmalldown
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mtlr %r0
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ld %r4,RETVAL+8(%r1)
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addi %r1, %r1, STACKFRAME
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blr
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.Lsmalldown:
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addi %r5, %r5, FFI_V2_TYPE_SMALL_STRUCT + 7
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mtlr %r0
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sldi %r5, %r5, 3
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addi %r1, %r1, STACKFRAME
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srd %r3, %r3, %r5
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blr
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# endif
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.LFE1:
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.long 0
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.byte 0,12,0,1,128,0,0,0
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# if _CALL_ELF == 2
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.size ffi_closure_LINUX64,.-ffi_closure_LINUX64
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# else
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# ifdef _CALL_LINUX
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.size ffi_closure_LINUX64,.-.L.ffi_closure_LINUX64
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# else
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.size .ffi_closure_LINUX64,.-.ffi_closure_LINUX64
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# endif
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# endif
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.section .eh_frame,EH_FRAME_FLAGS,@progbits
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.Lframe1:
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.4byte .LECIE1-.LSCIE1 # Length of Common Information Entry
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.LSCIE1:
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.4byte 0x0 # CIE Identifier Tag
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.byte 0x1 # CIE Version
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.ascii "zR\0" # CIE Augmentation
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.uleb128 0x1 # CIE Code Alignment Factor
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.sleb128 -8 # CIE Data Alignment Factor
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.byte 0x41 # CIE RA Column
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.uleb128 0x1 # Augmentation size
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.byte 0x14 # FDE Encoding (pcrel udata8)
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.byte 0xc # DW_CFA_def_cfa
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.uleb128 0x1
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.uleb128 0x0
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.align 3
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.LECIE1:
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.LSFDE1:
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.4byte .LEFDE1-.LASFDE1 # FDE Length
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.LASFDE1:
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.4byte .LASFDE1-.Lframe1 # FDE CIE offset
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.8byte .LFB1-. # FDE initial location
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.8byte .LFE1-.LFB1 # FDE address range
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.uleb128 0x0 # Augmentation size
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.byte 0x2 # DW_CFA_advance_loc1
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.byte .LCFI0-.LFB1
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.byte 0xe # DW_CFA_def_cfa_offset
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.uleb128 STACKFRAME
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.byte 0x11 # DW_CFA_offset_extended_sf
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.uleb128 0x41
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.sleb128 -2
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.align 3
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.LEFDE1:
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# if defined __ELF__ && defined __linux__
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.section .note.GNU-stack,"",@progbits
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# endif
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#endif
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