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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libffi/] [src/] [powerpc/] [sysv.S] - Blame information for rev 732

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1 732 jeremybenn
/* -----------------------------------------------------------------------
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   sysv.S - Copyright (c) 1998 Geoffrey Keating
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   Copyright (C) 2007 Free Software Foundation, Inc
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   PowerPC 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 
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#include 
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#include 
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#ifndef __powerpc64__
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        .globl ffi_prep_args_SYSV
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ENTRY(ffi_call_SYSV)
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.LFB1:
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        /* Save the old stack pointer as AP.  */
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        mr      %r8,%r1
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.LCFI0:
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        /* Allocate the stack space we need.  */
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        stwux   %r1,%r1,%r4
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        /* Save registers we use.  */
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        mflr    %r9
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        stw     %r28,-16(%r8)
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.LCFI1:
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        stw     %r29,-12(%r8)
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.LCFI2:
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        stw     %r30, -8(%r8)
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.LCFI3:
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        stw     %r31, -4(%r8)
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.LCFI4:
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        stw     %r9,   4(%r8)
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.LCFI5:
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        /* Save arguments over call...  */
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        mr      %r31,%r5        /* flags, */
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        mr      %r30,%r6        /* rvalue, */
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        mr      %r29,%r7        /* function address, */
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        mr      %r28,%r8        /* our AP. */
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.LCFI6:
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        /* Call ffi_prep_args_SYSV.  */
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        mr      %r4,%r1
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        bl      ffi_prep_args_SYSV@local
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        /* Now do the call.  */
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        /* Set up cr1 with bits 4-7 of the flags.  */
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        mtcrf   0x40,%r31
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        /* Get the address to call into CTR.  */
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        mtctr   %r29
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        /* Load all those argument registers.  */
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        lwz     %r3,-16-(8*4)(%r28)
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        lwz     %r4,-16-(7*4)(%r28)
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        lwz     %r5,-16-(6*4)(%r28)
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        lwz     %r6,-16-(5*4)(%r28)
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        bf-     5,1f
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        nop
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        lwz     %r7,-16-(4*4)(%r28)
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        lwz     %r8,-16-(3*4)(%r28)
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        lwz     %r9,-16-(2*4)(%r28)
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        lwz     %r10,-16-(1*4)(%r28)
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        nop
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1:
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        /* Load all the FP registers.  */
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        bf-     6,2f
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        lfd     %f1,-16-(8*4)-(8*8)(%r28)
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        lfd     %f2,-16-(8*4)-(7*8)(%r28)
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        lfd     %f3,-16-(8*4)-(6*8)(%r28)
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        lfd     %f4,-16-(8*4)-(5*8)(%r28)
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        nop
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        lfd     %f5,-16-(8*4)-(4*8)(%r28)
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        lfd     %f6,-16-(8*4)-(3*8)(%r28)
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        lfd     %f7,-16-(8*4)-(2*8)(%r28)
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        lfd     %f8,-16-(8*4)-(1*8)(%r28)
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2:
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        /* Make the call.  */
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        bctrl
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        /* Now, deal with the return value.  */
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        mtcrf   0x01,%r31 /* cr7  */
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        bt-     31,L(small_struct_return_value)
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        bt-     30,L(done_return_value)
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        bt-     29,L(fp_return_value)
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        stw     %r3,0(%r30)
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        bf+     28,L(done_return_value)
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        stw     %r4,4(%r30)
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        mtcrf   0x02,%r31 /* cr6  */
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        bf      27,L(done_return_value)
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        stw     %r5,8(%r30)
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        stw     %r6,12(%r30)
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        /* Fall through...  */
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L(done_return_value):
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        /* Restore the registers we used and return.  */
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        lwz     %r9,   4(%r28)
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        lwz     %r31, -4(%r28)
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        mtlr    %r9
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        lwz     %r30, -8(%r28)
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        lwz     %r29,-12(%r28)
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        lwz     %r28,-16(%r28)
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        lwz     %r1,0(%r1)
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        blr
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L(fp_return_value):
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        bf      28,L(float_return_value)
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        stfd    %f1,0(%r30)
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        mtcrf   0x02,%r31 /* cr6  */
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        bf      27,L(done_return_value)
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        stfd    %f2,8(%r30)
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        b       L(done_return_value)
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L(float_return_value):
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        stfs    %f1,0(%r30)
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        b       L(done_return_value)
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L(small_struct_return_value):
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        extrwi  %r6,%r31,2,19         /* number of bytes padding = shift/8 */
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        mtcrf   0x02,%r31             /* copy flags to cr[24:27] (cr6) */
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        extrwi  %r5,%r31,5,19         /* r5 <- number of bits of padding */
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        subfic  %r6,%r6,4             /* r6 <- number of useful bytes in r3 */
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        bf-     25,L(done_return_value) /* struct in r3 ? if not, done. */
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/* smst_one_register: */
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        slw     %r3,%r3,%r5           /* Left-justify value in r3 */
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        mtxer   %r6                   /* move byte count to XER ... */
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        stswx   %r3,0,%r30            /* ... and store that many bytes */
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        bf+     26,L(done_return_value)  /* struct in r3:r4 ? */
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        add     %r6,%r6,%r30          /* adjust pointer */
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        stswi   %r4,%r6,4             /* store last four bytes */
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        b       L(done_return_value)
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.LFE1:
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END(ffi_call_SYSV)
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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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#if defined _RELOCATABLE || defined __PIC__
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      .ascii    "zR\0"   /*  CIE Augmentation */
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#else
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      .ascii    "\0"     /*  CIE Augmentation */
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#endif
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      .uleb128  0x1      /*  CIE Code Alignment Factor */
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      .sleb128  -4       /*  CIE Data Alignment Factor */
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      .byte     0x41     /*  CIE RA Column */
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#if defined _RELOCATABLE || defined __PIC__
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      .uleb128  0x1      /*  Augmentation size */
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      .byte     0x1b     /*  FDE Encoding (pcrel sdata4) */
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#endif
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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 2
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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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#if defined _RELOCATABLE || defined __PIC__
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      .4byte    .LFB1-.  /*  FDE initial location */
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#else
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      .4byte    .LFB1    /*  FDE initial location */
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#endif
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      .4byte    .LFE1-.LFB1      /*  FDE address range */
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#if defined _RELOCATABLE || defined __PIC__
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      .uleb128  0x0      /*  Augmentation size */
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#endif
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      .byte     0x4      /*  DW_CFA_advance_loc4 */
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      .4byte    .LCFI0-.LFB1
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      .byte     0xd      /*  DW_CFA_def_cfa_register */
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      .uleb128  0x08
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      .byte     0x4      /*  DW_CFA_advance_loc4 */
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      .4byte    .LCFI5-.LCFI0
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      .byte     0x11     /*  DW_CFA_offset_extended_sf */
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      .uleb128  0x41
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      .sleb128  -1
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      .byte     0x9f     /*  DW_CFA_offset, column 0x1f */
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      .uleb128  0x1
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      .byte     0x9e     /*  DW_CFA_offset, column 0x1e */
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      .uleb128  0x2
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      .byte     0x9d     /*  DW_CFA_offset, column 0x1d */
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      .uleb128  0x3
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      .byte     0x9c     /*  DW_CFA_offset, column 0x1c */
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      .uleb128  0x4
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      .byte     0x4      /*  DW_CFA_advance_loc4 */
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      .4byte    .LCFI6-.LCFI5
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      .byte     0xd      /*  DW_CFA_def_cfa_register */
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      .uleb128  0x1c
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      .align 2
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.LEFDE1:
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#endif
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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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