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 | *
- * ------------------------------------------------- *
+ * |bchai|hiddn| fpscr | PC | CR | R14 | R15 | *
* ------------------------------------------------- *
- * | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | *
* ------------------------------------------------- *
* | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | *
* ------------------------------------------------- *
- * | F18 | F19 | F20 | F21 | *
- * ------------------------------------------------- *
+ * | R16 | R17 | R18 | R19 | R20 | R21 | R22 | R23 | *
* ------------------------------------------------- *
- * | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | *
* ------------------------------------------------- *
* | 64 | 68 | 72 | 76 | 80 | 84 | 88 | 92 | *
* ------------------------------------------------- *
- * | F22 | F23 | F24 | F25 | *
- * ------------------------------------------------- *
+ * | R24 | R25 | R26 | R27 | R28 | R29 | R30 | R31 | *
* ------------------------------------------------- *
- * | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | *
* ------------------------------------------------- *
* | 96 | 100 | 104 | 108 | 112 | 116 | 120 | 124 | *
* ------------------------------------------------- *
- * | F26 | F27 | F28 | F29 | *
- * ------------------------------------------------- *
+ * | F14 | F15 | F16 | F17 | *
* ------------------------------------------------- *
- * | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | *
* ------------------------------------------------- *
* | 128 | 132 | 136 | 140 | 144 | 148 | 152 | 156 | *
* ------------------------------------------------- *
- * | F30 | F31 | fpscr | R13 | R14 | *
- * ------------------------------------------------- *
+ * | F18 | F19 | F20 | F21 | *
* ------------------------------------------------- *
- * | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | *
* ------------------------------------------------- *
* | 160 | 164 | 168 | 172 | 176 | 180 | 184 | 188 | *
* ------------------------------------------------- *
- * | R15 | R16 | R17 | R18 | R19 | R20 | R21 | R22 | *
- * ------------------------------------------------- *
+ * | F22 | F23 | F24 | F25 | *
* ------------------------------------------------- *
- * | 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| | *
+ * | F26 | F27 | F28 | F29 | *
* ------------------------------------------------- *
+ * ------------------------|------------ *
+ * | 224 | 228 | 232 | 236 | 240 | 244 | *
+ * ------------------------|------------ *
+ * | F30 | F31 |bchai| LR | *
+ * ------------------------|------------ *
* *
*******************************************************/
.align 2
.type jump_fcontext,@function
jump_fcontext:
- # reserve space on stack
- subi %r1, %r1, 244
-
- stfd %f14, 0(%r1) # save F14
- stfd %f15, 8(%r1) # save F15
- stfd %f16, 16(%r1) # save F16
- stfd %f17, 24(%r1) # save F17
- stfd %f18, 32(%r1) # save F18
- stfd %f19, 40(%r1) # save F19
- stfd %f20, 48(%r1) # save F20
- stfd %f21, 56(%r1) # save F21
- stfd %f22, 64(%r1) # save F22
- stfd %f23, 72(%r1) # save F23
- stfd %f24, 80(%r1) # save F24
- stfd %f25, 88(%r1) # save F25
- stfd %f26, 96(%r1) # save F26
- stfd %f27, 104(%r1) # save F27
- stfd %f28, 112(%r1) # save F28
- stfd %f29, 120(%r1) # save F29
- stfd %f30, 128(%r1) # save F30
- stfd %f31, 136(%r1) # save F31
- mffs %f0 # load FPSCR
- stfd %f0, 144(%r1) # save FPSCR
-
- stw %r13, 152(%r1) # save R13
- stw %r14, 156(%r1) # save R14
- stw %r15, 160(%r1) # save R15
- stw %r16, 164(%r1) # save R16
- stw %r17, 168(%r1) # save R17
- stw %r18, 172(%r1) # save R18
- stw %r19, 176(%r1) # save R19
- stw %r20, 180(%r1) # save R20
- stw %r21, 184(%r1) # save R21
- stw %r22, 188(%r1) # save R22
- stw %r23, 192(%r1) # save R23
- stw %r24, 196(%r1) # save R24
- stw %r25, 200(%r1) # save R25
- stw %r26, 204(%r1) # save R26
- stw %r27, 208(%r1) # save R27
- stw %r28, 212(%r1) # save R28
- stw %r29, 216(%r1) # save R29
- stw %r30, 220(%r1) # save R30
- stw %r31, 224(%r1) # save R31
- stw %r3, 228(%r1) # save hidden
-
- # save CR
- mfcr %r0
- stw %r0, 232(%r1)
- # save LR
- mflr %r0
- stw %r0, 236(%r1)
- # save LR as PC
- stw %r0, 240(%r1)
-
- # store RSP (pointing to context-data) in R6
- mr %r6, %r1
-
- # restore RSP (pointing to context-data) from R4
- mr %r1, %r4
-
- lfd %f14, 0(%r1) # restore F14
- lfd %f15, 8(%r1) # restore F15
- lfd %f16, 16(%r1) # restore F16
- lfd %f17, 24(%r1) # restore F17
- lfd %f18, 32(%r1) # restore F18
- lfd %f19, 40(%r1) # restore F19
- lfd %f20, 48(%r1) # restore F20
- lfd %f21, 56(%r1) # restore F21
- lfd %f22, 64(%r1) # restore F22
- lfd %f23, 72(%r1) # restore F23
- lfd %f24, 80(%r1) # restore F24
- lfd %f25, 88(%r1) # restore F25
- lfd %f26, 96(%r1) # restore F26
- lfd %f27, 104(%r1) # restore F27
- lfd %f28, 112(%r1) # restore F28
- lfd %f29, 120(%r1) # restore F29
- lfd %f30, 128(%r1) # restore F30
- lfd %f31, 136(%r1) # restore F31
- lfd %f0, 144(%r1) # load FPSCR
- mtfsf 0xff, %f0 # restore FPSCR
-
- lwz %r13, 152(%r1) # restore R13
- lwz %r14, 156(%r1) # restore R14
- lwz %r15, 160(%r1) # restore R15
- lwz %r16, 164(%r1) # restore R16
- lwz %r17, 168(%r1) # restore R17
- lwz %r18, 172(%r1) # restore R18
- lwz %r19, 176(%r1) # restore R19
- lwz %r20, 180(%r1) # restore R20
- lwz %r21, 184(%r1) # restore R21
- lwz %r22, 188(%r1) # restore R22
- lwz %r23, 192(%r1) # restore R23
- lwz %r24, 196(%r1) # restore R24
- lwz %r25, 200(%r1) # restore R25
- lwz %r26, 204(%r1) # restore R26
- lwz %r27, 208(%r1) # restore R27
- lwz %r28, 212(%r1) # restore R28
- lwz %r29, 216(%r1) # restore R29
- lwz %r30, 220(%r1) # restore R30
- lwz %r31, 224(%r1) # restore R31
- lwz %r3, 228(%r1) # restore hidden
-
- # restore CR
- lwz %r0, 232(%r1)
- mtcr %r0
- # restore LR
- lwz %r0, 236(%r1)
+ # Linux: jump_fcontext( hidden transfer_t * R3, R4, R5)
+ # Other: transfer_t R3:R4 = jump_fcontext( R3, R4)
+
+ mflr %r0 # return address from LR
+ mffs %f0 # FPSCR
+ mfcr %r8 # condition register
+
+ stwu %r1, -240(%r1) # allocate stack space, R1 % 16 == 0
+ stw %r0, 244(%r1) # save LR in caller's frame
+
+#ifdef __linux__
+ stw %r3, 4(%r1) # hidden pointer
+#endif
+
+ stfd %f0, 8(%r1) # FPSCR
+ stw %r0, 16(%r1) # LR as PC
+ stw %r8, 20(%r1) # CR
+
+ # Save registers R14 to R31.
+ # Don't change R2, the thread-local storage pointer.
+ # Don't change R13, the small data pointer.
+ stw %r14, 24(%r1)
+ stw %r15, 28(%r1)
+ stw %r16, 32(%r1)
+ stw %r17, 36(%r1)
+ stw %r18, 40(%r1)
+ stw %r19, 44(%r1)
+ stw %r20, 48(%r1)
+ stw %r21, 52(%r1)
+ stw %r22, 56(%r1)
+ stw %r23, 60(%r1)
+ stw %r24, 64(%r1)
+ stw %r25, 68(%r1)
+ stw %r26, 72(%r1)
+ stw %r27, 76(%r1)
+ stw %r28, 80(%r1)
+ stw %r29, 84(%r1)
+ stw %r30, 88(%r1)
+ stw %r31, 92(%r1)
+
+ # Save registers F14 to F31 in slots with 8-byte alignment.
+ # 4-byte alignment may stall the pipeline of some processors.
+ # Less than 4 may cause alignment traps.
+ stfd %f14, 96(%r1)
+ stfd %f15, 104(%r1)
+ stfd %f16, 112(%r1)
+ stfd %f17, 120(%r1)
+ stfd %f18, 128(%r1)
+ stfd %f19, 136(%r1)
+ stfd %f20, 144(%r1)
+ stfd %f21, 152(%r1)
+ stfd %f22, 160(%r1)
+ stfd %f23, 168(%r1)
+ stfd %f24, 176(%r1)
+ stfd %f25, 184(%r1)
+ stfd %f26, 192(%r1)
+ stfd %f27, 200(%r1)
+ stfd %f28, 208(%r1)
+ stfd %f29, 216(%r1)
+ stfd %f30, 224(%r1)
+ stfd %f31, 232(%r1)
+
+ # store RSP (pointing to context-data) in R7/R6
+ # restore RSP (pointing to context-data) from R4/R3
+#ifdef __linux__
+ mr %r7, %r1
+ mr %r1, %r4
+ lwz %r3, 4(%r1) # hidden pointer
+#else
+ mr %r6, %r1
+ mr %r1, %r3
+#endif
+
+ lfd %f0, 8(%r1) # FPSCR
+ lwz %r0, 16(%r1) # PC
+ lwz %r8, 20(%r1) # CR
+
+ mtfsf 0xff, %f0 # restore FPSCR
+ mtctr %r0 # load CTR with PC
+ mtcr %r8 # restore CR
+
+ # restore R14 to R31
+ lwz %r14, 24(%r1)
+ lwz %r15, 28(%r1)
+ lwz %r16, 32(%r1)
+ lwz %r17, 36(%r1)
+ lwz %r18, 40(%r1)
+ lwz %r19, 44(%r1)
+ lwz %r20, 48(%r1)
+ lwz %r21, 52(%r1)
+ lwz %r22, 56(%r1)
+ lwz %r23, 60(%r1)
+ lwz %r24, 64(%r1)
+ lwz %r25, 68(%r1)
+ lwz %r26, 72(%r1)
+ lwz %r27, 76(%r1)
+ lwz %r28, 80(%r1)
+ lwz %r29, 84(%r1)
+ lwz %r30, 88(%r1)
+ lwz %r31, 92(%r1)
+
+ # restore F14 to F31
+ lfd %f14, 96(%r1)
+ lfd %f15, 104(%r1)
+ lfd %f16, 112(%r1)
+ lfd %f17, 120(%r1)
+ lfd %f18, 128(%r1)
+ lfd %f19, 136(%r1)
+ lfd %f20, 144(%r1)
+ lfd %f21, 152(%r1)
+ lfd %f22, 160(%r1)
+ lfd %f23, 168(%r1)
+ lfd %f24, 176(%r1)
+ lfd %f25, 184(%r1)
+ lfd %f26, 192(%r1)
+ lfd %f27, 200(%r1)
+ lfd %f28, 208(%r1)
+ lfd %f29, 216(%r1)
+ lfd %f30, 224(%r1)
+ lfd %f31, 232(%r1)
+
+ # restore LR from caller's frame
+ lwz %r0, 244(%r1)
mtlr %r0
- # load PC
- lwz %r0, 240(%r1)
- # restore CTR
- mtctr %r0
# adjust stack
- addi %r1, %r1, 244
+ addi %r1, %r1, 240
- # return transfer_t
- stw %r6, 0(%r3)
+ # return transfer_t
+#ifdef __linux__
+ stw %r7, 0(%r3)
stw %r5, 4(%r3)
+#else
+ mr %r3, %r6
+ # %r4, %r4
+#endif
# jump to context
bctr
projects / platform / upstream / boost.git / blobdiff