+++ /dev/null
-/* -----------------------------------------------------------------------
- darwin.S - Copyright (c) 2000 John Hornkvist
-
- PowerPC Assembly glue.
-
- $Id: darwin.S,v 1.2 2002/01/18 16:22:34 dje Exp $
-
- 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 AUTHOR 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 <ffi.h>
-#define JUMPTARGET(name) name
-#define L(x) x
-.text
- .align 2
-.globl _ffi_prep_args
-
-.text
- .align 2
-.globl _ffi_call_DARWIN
-.text
- .align 2
-_ffi_call_DARWIN:
- mr r12,r8 // We only need r12 until the call, so it doesn't have to be saved...
- /* Save the old stack pointer as AP. */
- mr r8,r1
-
- /* Allocate the stack space we need. */
- stwux r1,r1,r4
-
- /* Save registers we use. */
- mflr r9
-
- stw r28,-16(r8)
- stw r29,-12(r8)
- stw r30, -8(r8)
- stw r31, -4(r8)
-
- stw r9, 8(r8)
- stw r2, 20(r1)
-
- /* Save arguments over call... */
- mr r31,r5 /* flags, */
- mr r30,r6 /* rvalue, */
- mr r29,r7 /* function address, */
- mr r28,r8 /* our AP. */
-
- /* Call ffi_prep_args. */
- mr r4,r1
- li r9,0
-
- mtctr r12 // r12 holds address of _ffi_prep_args
- bctrl
- lwz r2,20(r1)
-
- /* Now do the call. */
- /* Set up cr1 with bits 4-7 of the flags. */
- mtcrf 0x40,r31
- /* Get the address to call into CTR. */
- mtctr r29
- /* Load all those argument registers. */
- // We have set up a nice stack frame, just load it into registers.
- lwz r3, 20+(1*4)(r1)
- lwz r4, 20+(2*4)(r1)
- lwz r5, 20+(3*4)(r1)
- lwz r6, 20+(4*4)(r1)
- nop
- lwz r7, 20+(5*4)(r1)
- lwz r8, 20+(6*4)(r1)
- lwz r9, 20+(7*4)(r1)
- lwz r10,20+(8*4)(r1)
-
-L1:
- /* Load all the FP registers. */
- bf 6,L2 // 2f + 0x18
- lfd f1,-16-(13*8)(r28)
- lfd f2,-16-(12*8)(r28)
- lfd f3,-16-(11*8)(r28)
- lfd f4,-16-(10*8)(r28)
- nop
- lfd f5,-16-(9*8)(r28)
- lfd f6,-16-(8*8)(r28)
- lfd f7,-16-(7*8)(r28)
- lfd f8,-16-(6*8)(r28)
- nop
- lfd f9,-16-(5*8)(r28)
- lfd f10,-16-(4*8)(r28)
- lfd f11,-16-(3*8)(r28)
- lfd f12,-16-(2*8)(r28)
- nop
- lfd f13,-16-(1*8)(r28)
-
-L2:
- mr r12,r29 // Put the target address in r12 as specified.
- mtctr r12
- nop
- nop
- /* Make the call. */
- bctrl
-
- /* Now, deal with the return value. */
- mtcrf 0x01,r31
-
- bt 30,L(done_return_value)
- bt 29,L(fp_return_value)
- stw r3,0(r30)
- bf 28,L(done_return_value)
- stw r4,4(r30)
-
- /* Fall through... */
-
-L(done_return_value):
- /* Restore the registers we used and return. */
- lwz r9, 8(r28)
- lwz r31, -4(r28)
- mtlr r9
- lwz r30, -8(r28)
- lwz r29,-12(r28)
- lwz r28,-16(r28)
- lwz r1,0(r1)
- blr
-
-L(fp_return_value):
- bf 28,L(float_return_value)
- stfd f1,0(r30)
- b L(done_return_value)
-L(float_return_value):
- stfs f1,0(r30)
- b L(done_return_value)
-//END(_ffi_call_DARWIN)
-
-/* Provide a null definition of _ffi_call_AIX. */
-.text
- .align 2
-.globl _ffi_call_AIX
-.text
- .align 2
-_ffi_call_AIX:
- blr
-//END(_ffi_call_AIX)
-
projects / msp430-gcc.git / blobdiff