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comparison dyncallback/dyncall_callback_mips_n64_gas.s @ 122:f63467916f98

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- first draft of mips64 n64 callbacks, not everything working, though
author cslag
date Mon, 04 Jul 2016 01:11:08 +0200
parents c5cb02203df4
children 6bd0974d257b
comparison
equal deleted inserted replaced
121:f00b1f3da52e 122:f63467916f98
18 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 18 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 19 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 20 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
21 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 21 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
22 22
23 @@@ NOT FULLY WORKING, YET
23 */ 24 */
25
26 /* input:
27 $t8 -> thunk
28 $t8+56 -> cb handler
29 $t8+64 -> userdata
30 */
24 31
25 .section .mdebug.abi64 32 .section .mdebug.abi64
26 .previous 33 .previous
27 .abicalls 34 .abicalls
28 .text 35 .text
29 .align 2 36 .align 2
30 .globl dcCallbackThunkEntry 37 .globl dcCallbackThunkEntry
31 .ent dcCallbackThunkEntry 38 .ent dcCallbackThunkEntry
32 dcCallbackThunkEntry: 39 dcCallbackThunkEntry:
40 .set noreorder
33 41
34 .end dcCallbackThunkEntry 42 /* Prolog. */
43 /* Frame size of 160b comes from following: */
44 /* DCargs(fregs:64 + iregs:64 + regcounts:8 + stackptr:8) + retval:8 + ra:8 */
45 subu $sp, 160 /* open frame */
46 sd $ra, 152($sp) /* save link register */
35 47
48 .frame $fp,160,$31 /* specify our frame: fp,size,lr; creates virt $fp */
49 /* code below doesn't use $fp though, as n/a with -O1 */
50 /* Init return value */
51 sd $zero, 144($sp)
52
53 /* Store float and int args where our DCargs member arrays are, in local area. */
54 sd $4, 0($sp)
55 sd $5, 8($sp)
56 sd $6, 16($sp)
57 sd $7, 24($sp)
58 sd $8, 32($sp)
59 sd $9, 40($sp)
60 sd $10, 48($sp)
61 sd $11, 56($sp)
62 s.d $f12, 64($sp)
63 s.d $f13, 72($sp)
64 s.d $f14, 80($sp)
65 s.d $f15, 88($sp)
66 s.d $f16, 96($sp)
67 s.d $f17, 104($sp)
68 s.d $f18, 112($sp)
69 s.d $f19, 120($sp)
70
71 /* Init DCarg's reg_counts and stackptr. */
72 sd $zero, 128($sp) /* reg_count */
73 addiu $4, $sp, 160
74 sd $4, 136($sp) /* stackptr */
75
76 /* Prepare callback handler call. */
77 move $4, $24 /* Param 0 = DCCallback*, $24 ($t8) holds pointer to thunk */
78 move $5, $sp /* Param 1 = DCArgs*, pointer to where pointer to args is stored */
79 addiu $6, $sp, 144 /* Param 2 = results pointer to 8b of local data on stack */
80 ld $7, 64($24) /* Param 3 = userdata pointer */
81
82 ld $25, 56($24) /* store handler entry in $25 ($t9), required for PIC */
83 jalr $25 /* jump */
84 nop /* branch delay nop */
85
86 /* Copy result in corresponding registers $2-$3 ($v0-$v1) and $f0 */
87 ld $2, 144($sp)
88 /*ld $3, 152($sp) @@@ ignoring second possible retval for now*/
89 l.d $f0, 144($sp)
90
91 /* Epilog. Tear down frame and return. */
92 ld $ra, 152($sp) /* restore return address */
93 addiu $sp, $sp, 160 /* close frame */
94 j $ra /* return */
95 nop /* branch delay nop */
96
97 .set reorder
98 .end dcCallbackThunkEntry
99 .ident "handwritten"
100