[ceph.git] / ceph / src / boost / libs / context / src / asm / make_ppc32_sysv_macho_gas.S

/*
            Copyright Oliver Kowalke 2009.
   Distributed under the Boost Software License, Version 1.0.
      (See accompanying file LICENSE_1_0.txt or copy at
          http://www.boost.org/LICENSE_1_0.txt)
*/

/******************************************************
 *                                                     *
 *  -------------------------------------------------  *
 *  |  0  |  1  |  2  |  3  |  4  |  5  |  6  |  7  |  *
 *  -------------------------------------------------  *
 *  |  0  |  4  |  8  |  12 |  16 |  20 |  24 |  28 |  *
 *  -------------------------------------------------  *
 *  |    F14    |    F15    |    F16    |    F17    |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  8  |  9  |  10 |  11 |  12 |  13 |  14 |  15 |  *
 *  -------------------------------------------------  *
 *  |  32 |  36 |  40 |  44 |  48 |  52 |  56 |  60 |  *
 *  -------------------------------------------------  *
 *  |    F18    |    F19    |    F20    |    F21    |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  16 |  17 |  18 |  19 |  20 |  21 |  22 |  23 |  *
 *  -------------------------------------------------  *
 *  |  64 |  68 |  72 |  76 |  80 |  84 |  88 |  92 |  *
 *  -------------------------------------------------  *
 *  |    F22    |    F23    |    F24    |    F25    |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  24 |  25 |  26 |  27 |  28 |  29 |  30 |  31 |  *
 *  -------------------------------------------------  *
 *  |  96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 |  *
 *  -------------------------------------------------  *
 *  |    F26    |    F27    |    F28    |    F29    |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  32 |  33 |  34 |  35 |  36 |  37 |  38 |  39 |  *
 *  -------------------------------------------------  *
 *  | 128 | 132 | 136 | 140 | 144 | 148 | 152 | 156 |  *
 *  -------------------------------------------------  *
 *  |    F30    |    F31    |   fpscr   | R13 | R14 |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  40 |  41 |  42 |  43 |  44 |  45 |  46 |  47 |  *
 *  -------------------------------------------------  *
 *  | 160 | 164 | 168 | 172 | 176 | 180 | 184 | 188 |  *
 *  -------------------------------------------------  *
 *  | R15 | R16 | R17 | R18 | R19 | R20 | R21 | R22 |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  48 |  49 |  50 |  51 |  52 |  53 |  54 |  55 |  *
 *  -------------------------------------------------  *
 *  | 192 | 196 | 200 | 204 | 208 | 212 | 216 | 220 |  *
 *  -------------------------------------------------  *
 *  | R23 | R24 | R25 | R26 | R27 | R28 | R29 | R30 |  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  56 |  57 |  58 |  59 |  60 |  61 |  62 |  63 |  *
 *  -------------------------------------------------  *
 *  | 224 | 228 | 232 | 236 | 240 | 244 | 248 | 252 |  *
 *  -------------------------------------------------  *
 *  | R31 |hiddn|  CR |  LR |  PC |bchai|linkr| FCTX|  *
 *  -------------------------------------------------  *
 *  -------------------------------------------------  *
 *  |  64 |                                         |  *
 *  -------------------------------------------------  *
 *  | 256 |                                         |  *
 *  -------------------------------------------------  *
 *  | DATA|                                         |  * 
 *  -------------------------------------------------  *
 *                                                     *
 *******************************************************/

.text
.globl _make_fcontext
.align 2
_make_fcontext:
    # save return address into R6
    mflr  r6

    # first arg of make_fcontext() == top address of context-function
    # shift address in R3 to lower 16 byte boundary
    clrrwi  r3, r3, 4

    # reserve space for context-data on context-stack
    # including 64 byte of linkage + parameter area (R1  16 == 0)
    subi  r3, r3, 336

    # third arg of make_fcontext() == address of context-function
    stw  r5, 240(r3)

    # set back-chain to zero
    li   r0, 0
    stw  r0, 244(r3)

    mffs  f0  # load FPSCR
    stfd  f0, 144(r3)  # save FPSCR

    # compute address of returned transfer_t
    addi  r0, r3, 252
    mr    r4, r0 
    stw   r4, 228(r3) 

    # load LR
    mflr  r0
    # jump to label 1
    bl  1f
1:
    # load LR into R4
    mflr  r4
    # compute abs address of label finish
    addi  r4, r4, finish - 1b
    # restore LR
    mtlr  r0
    # save address of finish as return-address for context-function
    # will be entered after context-function returns
    stw  r4, 236(r3)

    # restore return address from R6
    mtlr  r6

    blr  # return pointer to context-data

finish:
    # save return address into R0
    mflr  r0
    # save return address on stack, set up stack frame
    stw  r0, 4(r1)
    # allocate stack space, R1  16 == 0
    stwu  r1, -16(r1)

    # exit code is zero
    li  r3, 0
    # exit application
    bl  _exit@plt
Commit	Line	Data
7c673cae FG	1	/*
	2	Copyright Oliver Kowalke 2009.
	3	Distributed under the Boost Software License, Version 1.0.
	4	(See accompanying file LICENSE_1_0.txt or copy at
	5	http://www.boost.org/LICENSE_1_0.txt)
	6	*/
	7
	8	/******************************************************
	9	* *
	10	* ------------------------------------------------- *
	11	* \| 0 \| 1 \| 2 \| 3 \| 4 \| 5 \| 6 \| 7 \| *
	12	* ------------------------------------------------- *
	13	* \| 0 \| 4 \| 8 \| 12 \| 16 \| 20 \| 24 \| 28 \| *
	14	* ------------------------------------------------- *
b32b8144	15	* \| F14 \| F15 \| F16 \| F17 \| *
7c673cae FG	16	* ------------------------------------------------- *
	17	* ------------------------------------------------- *
	18	* \| 8 \| 9 \| 10 \| 11 \| 12 \| 13 \| 14 \| 15 \| *
	19	* ------------------------------------------------- *
	20	* \| 32 \| 36 \| 40 \| 44 \| 48 \| 52 \| 56 \| 60 \| *
	21	* ------------------------------------------------- *
b32b8144	22	* \| F18 \| F19 \| F20 \| F21 \| *
7c673cae FG	23	* ------------------------------------------------- *
	24	* ------------------------------------------------- *
	25	* \| 16 \| 17 \| 18 \| 19 \| 20 \| 21 \| 22 \| 23 \| *
	26	* ------------------------------------------------- *
	27	* \| 64 \| 68 \| 72 \| 76 \| 80 \| 84 \| 88 \| 92 \| *
	28	* ------------------------------------------------- *
b32b8144	29	* \| F22 \| F23 \| F24 \| F25 \| *
7c673cae FG	30	* ------------------------------------------------- *
	31	* ------------------------------------------------- *
	32	* \| 24 \| 25 \| 26 \| 27 \| 28 \| 29 \| 30 \| 31 \| *
	33	* ------------------------------------------------- *
	34	* \| 96 \| 100 \| 104 \| 108 \| 112 \| 116 \| 120 \| 124 \| *
	35	* ------------------------------------------------- *
b32b8144 FG	36	* \| F26 \| F27 \| F28 \| F29 \| *
	37	* ------------------------------------------------- *
	38	* ------------------------------------------------- *
	39	* \| 32 \| 33 \| 34 \| 35 \| 36 \| 37 \| 38 \| 39 \| *
	40	* ------------------------------------------------- *
	41	* \| 128 \| 132 \| 136 \| 140 \| 144 \| 148 \| 152 \| 156 \| *
	42	* ------------------------------------------------- *
	43	* \| F30 \| F31 \| fpscr \| R13 \| R14 \| *
	44	* ------------------------------------------------- *
	45	* ------------------------------------------------- *
	46	* \| 40 \| 41 \| 42 \| 43 \| 44 \| 45 \| 46 \| 47 \| *
	47	* ------------------------------------------------- *
	48	* \| 160 \| 164 \| 168 \| 172 \| 176 \| 180 \| 184 \| 188 \| *
	49	* ------------------------------------------------- *
	50	* \| R15 \| R16 \| R17 \| R18 \| R19 \| R20 \| R21 \| R22 \| *
	51	* ------------------------------------------------- *
	52	* ------------------------------------------------- *
	53	* \| 48 \| 49 \| 50 \| 51 \| 52 \| 53 \| 54 \| 55 \| *
	54	* ------------------------------------------------- *
	55	* \| 192 \| 196 \| 200 \| 204 \| 208 \| 212 \| 216 \| 220 \| *
	56	* ------------------------------------------------- *
	57	* \| R23 \| R24 \| R25 \| R26 \| R27 \| R28 \| R29 \| R30 \| *
	58	* ------------------------------------------------- *
	59	* ------------------------------------------------- *
	60	* \| 56 \| 57 \| 58 \| 59 \| 60 \| 61 \| 62 \| 63 \| *
	61	* ------------------------------------------------- *
	62	* \| 224 \| 228 \| 232 \| 236 \| 240 \| 244 \| 248 \| 252 \| *
	63	* ------------------------------------------------- *
	64	* \| R31 \|hiddn\| CR \| LR \| PC \|bchai\|linkr\| FCTX\| *
	65	* ------------------------------------------------- *
	66	* ------------------------------------------------- *
	67	* \| 64 \| \| *
	68	* ------------------------------------------------- *
	69	* \| 256 \| \| *
	70	* ------------------------------------------------- *
	71	* \| DATA\| \| *
7c673cae FG	72	* ------------------------------------------------- *
	73	* *
	74	*******************************************************/
	75
	76	.text
	77	.globl _make_fcontext
	78	.align 2
	79	_make_fcontext:
b32b8144	80	# save return address into R6
7c673cae FG	81	mflr r6
7c673cae FG	82
b32b8144 FG	83	# first arg of make_fcontext() == top address of context-function
b32b8144 FG	84	# shift address in R3 to lower 16 byte boundary
7c673cae FG	85	clrrwi r3, r3, 4
7c673cae FG	86
b32b8144 FG	87	# reserve space for context-data on context-stack
	88	# including 64 byte of linkage + parameter area (R1 16 == 0)
	89	subi r3, r3, 336
7c673cae	90
b32b8144 FG	91	# third arg of make_fcontext() == address of context-function
b32b8144 FG	92	stw r5, 240(r3)
7c673cae	93
b32b8144	94	# set back-chain to zero
7c673cae	95	li r0, 0
b32b8144 FG	96	stw r0, 244(r3)
	97
	98	mffs f0 # load FPSCR
	99	stfd f0, 144(r3) # save FPSCR
7c673cae	100
b32b8144 FG	101	# compute address of returned transfer_t
b32b8144 FG	102	addi r0, r3, 252
7c673cae	103	mr r4, r0
b32b8144	104	stw r4, 228(r3)
7c673cae	105
b32b8144	106	# load LR
7c673cae	107	mflr r0
b32b8144 FG	108	# jump to label 1
	109	bl 1f
	110	1:
	111	# load LR into R4
7c673cae	112	mflr r4
b32b8144 FG	113	# compute abs address of label finish
b32b8144 FG	114	addi r4, r4, finish - 1b
7c673cae FG	115	# restore LR
7c673cae FG	116	mtlr r0
b32b8144 FG	117	# save address of finish as return-address for context-function
	118	# will be entered after context-function returns
	119	stw r4, 236(r3)
7c673cae	120
b32b8144	121	# restore return address from R6
7c673cae FG	122	mtlr r6
7c673cae FG	123
b32b8144	124	blr # return pointer to context-data
7c673cae FG	125
7c673cae FG	126	finish:
b32b8144	127	# save return address into R0
7c673cae	128	mflr r0
b32b8144	129	# save return address on stack, set up stack frame
7c673cae	130	stw r0, 4(r1)
b32b8144	131	# allocate stack space, R1 16 == 0
7c673cae FG	132	stwu r1, -16(r1)
7c673cae FG	133
b32b8144	134	# exit code is zero
7c673cae	135	li r3, 0
b32b8144 FG	136	# exit application
b32b8144 FG	137	bl _exit@plt