/* -----------------------------------------------------------------------
unix.S - Copyright (c) 1998 Cygnus Solutions
Copyright (c) 2000 Hewlett Packard Company
IA64/unix Foreign Function Interface
Primary author: Hans Boehm, HP Labs
Loosely modeled on Cygnus code for other platforms.
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 CYGNUS SOLUTIONS 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>
#include "ia64_flags.h"
/* parameters: */
#define callback in0
#define ecifp in1
#define bytes in2
#define flags in3
#define raddr in4
#define fn in5
#define FLOAT_SZ 8 /* in-memory size of fp operands */
/* Allocate an ia64_args structure on the stack/* registers, leaving overflow arguments on the stack. Then call fn */
/* and move the result from registers into *raddr. */
.pred.safe_across_calls p1-p5,p16-p63
.text
.align 16
.global ffi_call_unix
.proc ffi_call_unix
ffi_call_unix:
.prologue
.save ar.pfs,r38 /* loc0 */
alloc loc0=ar.pfs,6,6,8,0
.save rp,loc1
mov loc1=b0 mov loc5=sp sub sp=sp,bytes
mov loc4=r1 /* Save gp */
ld8 r8=[callback],8 /* code address of callback */
mov out1=ecifp
mov out2=bytes
ld8 r1=[callback] /* Set up gp for callback. Unnecessary? */
mov b6=r8
cmp.eq p6,p0=0,r8 /* r8 nonzero ==> need fp regs */
(p6) br.cond.dptk.many fp_done
add loc3=32+FLOAT_SZ,sp
ldfd f9=[loc3],2*FLOAT_SZ
ldfd f11=[loc3],2*FLOAT_SZ
ldfd f13=[loc3],2*FLOAT_SZ
ldfd f15=[loc3]
fp_done:
add r9=16,sp /* Pointer to r8_contents */
/* loc2 points at first integer register value. */
add loc3=8,loc2
ld8 out0=[loc2],16
ld8 out1=[loc3],16
ld8 out3=[loc3],16
ld8 out5=[loc3],16
ld8 out7=[loc3]
/* Set sp to 16 bytes below the first stack parameter. This */
/* is the value currently in loc2. */
mov sp=loc2
ld8 r8=[fn],8
mov b6=r8
/* Handle return value. */
cmp.eq p6,p0=0,raddr
cmp.eq p7,p0=FFI_TYPE_INT,flags
cmp.eq p10,p0=FFI_IS_SMALL_STRUCT2,flags
cmp.eq p11,p0=FFI_IS_SMALL_STRUCT3,flags
cmp.eq p12,p0=FFI_IS_SMALL_STRUCT4,flags
(p7) br.cond.dptk.few copy1
(p10) br.cond.dpnt.few copy2
(p11) br.cond.dpnt.few copy3
(p12) br.cond.dpnt.few copy4
cmp.eq p8,p0=FFI_TYPE_FLOAT,flags
cmp.eq p9,p0=FFI_TYPE_DOUBLE,flags
tbit.nz p6,p0=flags,FLOAT_FP_AGGREGATE_BIT
tbit.nz p7,p0=flags,DOUBLE_FP_AGGREGATE_BIT
(p9) stfd [raddr]=f8
(p6) br.cond.dpnt.few handle_float_hfa
(p7) br.cond.dpnt.few handle_double_hfa
br done
copy4:
add loc3=24,raddr
copy3:
add loc3=16,raddr
copy2:
add loc3=8,raddr
copy1:
st8 [raddr]=r8
/* In the big struct case, raddr was passed as an argument. */
/* In the void case there was nothing to do. */
done:
mov r1=loc4 /* Restore gp */
mov ar.pfs = loc0
mov b0 = loc1
.restore sp
mov sp = loc5
br.ret.sptk.many b0
handle_double_hfa:
.body
.copy_state 1
/* Homogeneous floating point array of doubles is returned in */
/* registers f8-f15. Save one at a time to return area. */
and flags=0xf,flags /* Retrieve size */
cmp.eq p7,p0=3,flags
cmp.eq p8,p0=4,flags
cmp.eq p9,p0=5,flags
cmp.eq p10,p0=6,flags
cmp.eq p11,p0=7,flags
cmp.eq p12,p0=8,flags
(p7) br.cond.dptk.few dhfa3
(p8) br.cond.dptk.few dhfa4
(p9) br.cond.dptk.few dhfa5
(p10) br.cond.dptk.few dhfa6
(p11) br.cond.dptk.few dhfa7
dhfa8: add loc3=7*8,raddr
dhfa7: add loc3=6*8,raddr
dhfa6: add loc3=5*8,raddr
dhfa5: add loc3=4*8,raddr
dhfa4: add loc3=3*8,raddr
dhfa3: add loc3=2*8,raddr
dhfa2: add loc3=1*8,raddr
stfd [raddr]=f8
br done
handle_float_hfa:
/* Homogeneous floating point array of floats is returned in */
/* registers f8-f15. Save one at a time to return area. */
and flags=0xf,flags /* Retrieve size */
cmp.eq p7,p0=3,flags
cmp.eq p8,p0=4,flags
cmp.eq p9,p0=5,flags
cmp.eq p10,p0=6,flags
cmp.eq p11,p0=7,flags
cmp.eq p12,p0=8,flags
(p7) br.cond.dptk.few shfa3
(p8) br.cond.dptk.few shfa4
(p9) br.cond.dptk.few shfa5
(p10) br.cond.dptk.few shfa6
(p11) br.cond.dptk.few shfa7
shfa8: add loc3=7*4,raddr
shfa7: add loc3=6*4,raddr
shfa6: add loc3=5*4,raddr
shfa5: add loc3=4*4,raddr
shfa4: add loc3=3*4,raddr
shfa3: add loc3=2*4,raddr
shfa2: add loc3=1*4,raddr
stfd [raddr]=f8
br done
.endp ffi_call_unix
.pred.safe_across_calls p1-p5,p16-p63
.text
.align 16
.global ffi_closure_UNIX
.proc ffi_closure_UNIX
ffi_closure_UNIX:
.prologue
.save ar.pfs,r40 /* loc0 */
alloc loc0=ar.pfs,8,3,2,0
.save rp,loc1
mov loc1=b0
.vframe loc2
mov loc2=sp
/* Retrieve closure pointer and real gp. */
mov out0=gp
add gp=16,gp
/* Reserve a structia64_args on the stack such that arguments */
/* past the first 8 are automatically placed in the right */
/* slot. Note that when we start the sp points at 2 8-byte */
/* scratch words, followed by the extra arguments. */
# define BASIC_ARGS_SZ (8*FLOAT_SZ+8*8+2*8)
# define FIRST_FP_OFFSET (4*8)
add r14=-(BASIC_ARGS_SZ-FIRST_FP_OFFSET),sp
add r15=-(BASIC_ARGS_SZ-FIRST_FP_OFFSET-FLOAT_SZ),sp
add sp=-BASIC_ARGS_SZ,sp
/* r14 points to fp_regs[0], r15 points to fp_regs[1] */
stfd [r15]=f9,2*FLOAT_SZ
stfd [r15]=f11,2*FLOAT_SZ
stfd [r15]=f13,2*FLOAT_SZ
stfd [r15]=f15,2*8
st8 [r14]=in0,2*8
st8 [r15]=in1,2*8
st8 [r15]=in3,2*8
st8 [r15]=in5,2*8
st8 [r15]=in7,2*8
/* Call ffi_closure_UNIX_inner */
mov out1=sp
br.call.sptk.many b0=ffi_closure_UNIX_inner
mov ar.pfs=loc0
.restore sp
mov sp=loc2
br.ret.sptk.many b0
.endp ffi_closure_UNIX