Mercurial > pub > dyncall > dyncall
view doc/disas_examples/mips.eabi.disas @ 361:06c9adae114d
- typos
| author | Tassilo Philipp |
|---|---|
| date | Mon, 13 Apr 2020 21:40:28 +0200 |
| parents | c0390dc85a07 |
| children | fe694c7677b4 |
line wrap: on
line source
; #include <stdlib.h> ; ; void leaf_call(int b, int c, int d, int e, int f, int g, int h) ; { ; } ; ; void nonleaf_call(int a, int b, int c, int d, int e, int f, int g, int h) ; { ; /* use some local data */ ; *(char*)alloca(220) = 'L'; ; leaf_call(b, c, d, e, f, g, h); ; } ; ; int main() ; { ; nonleaf_call(0, 1, 2, 3, 4, 5, 6, 7); ; return 0; ; } ; output from psptoolchain-20111215-psp w/ gcc 4.9.3 00000000 <leaf_call>: 0: 27bdffd8 addiu sp,sp,-40 4: afbe0024 sw s8,36(sp) 8: 03a0f021 move s8,sp c: afc40000 sw a0,0(s8) 10: afc50004 sw a1,4(s8) 14: afc60008 sw a2,8(s8) 18: afc7000c sw a3,12(s8) 1c: afc80010 sw t0,16(s8) 20: afc90014 sw t1,20(s8) 24: afca0018 sw t2,24(s8) 28: 03c0e821 move sp,s8 2c: 8fbe0024 lw s8,36(sp) 30: 27bd0028 addiu sp,sp,40 34: 03e00008 jr ra 38: 00000000 nop 0000003c <nonleaf_call>: 3c: 27bdffd8 addiu sp,sp,-40 ; | 40: afbf0024 sw ra,36(sp) ; | 44: afbe0020 sw s8,32(sp) ; | prolog 48: 03a0f021 move s8,sp ; / frame pointer (note: with offset to frame start, but static compared to sp) 4c: afc40000 sw a0,0(s8) ; \ 50: afc50004 sw a1,4(s8) ; | 54: afc60008 sw a2,8(s8) ; | 58: afc7000c sw a3,12(s8) ; | 5c: afc80010 sw t0,16(s8) ; | in args 0,1,2,3,4,5,6,7 -> temp space in local area 60: afc90014 sw t1,20(s8) ; | 64: afca0018 sw t2,24(s8) ; | 68: afcb001c sw t3,28(s8) ; | 6c: 27bdff18 addiu sp,sp,-232 ; alloca(220) - with padding to guarantee alignment 70: 03a01021 move v0,sp ; | 74: 24420007 addiu v0,v0,7 ; | 78: 000210c2 srl v0,v0,0x3 ; | start of alloca()'d memory -> v1, by ... 7c: 000210c0 sll v0,v0,0x3 ; | ... using v0 as helper to align to 8b 80: 00401821 move v1,v0 ; | 84: 2402004c li v0,76 ; 'L' -> v0, and... 88: a0620000 sb v0,0(v1) ; ... store in local area (of alloca()'d space) 8c: 8fc40004 lw a0,4(s8) ; | 90: 8fc50008 lw a1,8(s8) ; | 94: 8fc6000c lw a2,12(s8) ; | 98: 8fc70010 lw a3,16(s8) ; | arg 0,1,2,3,4,5,6 (fetched from local area stored to above) 9c: 8fc80014 lw t0,20(s8) ; | (t0 = a4) a0: 8fc90018 lw t1,24(s8) ; | (t1 = a5) a4: 8fca001c lw t2,28(s8) ; | (t2 = a6) a8: 0c000000 jal 0 <leaf_call> ; call and ret addr -> ra ac: 00000000 nop ; branch delay slot b0: 03c0e821 move sp,s8 ; | b4: 8fbf0024 lw ra,36(sp) ; | b8: 8fbe0020 lw s8,32(sp) ; | bc: 27bd0028 addiu sp,sp,40 ; | epilog c0: 03e00008 jr ra ; | c4: 00000000 nop ; | branch delay slot 000000c8 <main>: c8: 27bdfff8 addiu sp,sp,-8 ; | cc: afbf0004 sw ra,4(sp) ; | d0: afbe0000 sw s8,0(sp) ; | prolog d4: 03a0f021 move s8,sp ; | frame pointer (note: with offset to frame start, but static compared to sp) d8: 00002021 move a0,zero ; arg 0 dc: 24050001 li a1,1 ; arg 1 e0: 24060002 li a2,2 ; arg 2 e4: 24070003 li a3,3 ; arg 3 e8: 24080004 li t0,4 ; arg 4 (t0 = a4) ec: 24090005 li t1,5 ; arg 5 (t1 = a5) f0: 240a0006 li t2,6 ; arg 6 (t2 = a6) f4: 240b0007 li t3,7 ; arg 7 (t3 = a7) f8: 0c000000 jal 0 <leaf_call> ; call and ret addr -> ra fc: 00000000 nop ; branch delay slot 100: 00001021 move v0,zero ; return value 104: 03c0e821 move sp,s8 ; | 108: 8fbf0004 lw ra,4(sp) ; | 10c: 8fbe0000 lw s8,0(sp) ; | 110: 27bd0008 addiu sp,sp,8 ; | epilog 114: 03e00008 jr ra ; | 118: 00000000 nop ; | branch delay slot ; ------------- as above but more args to use stack params -----------> ; #include <stdlib.h> ; ; void leaf_call(int b, int c, int d, int e, int f, int g, int h, int i, int j) ; { ; } ; ; void nonleaf_call(int a, int b, int c, int d, int e, int f, int g, int h, int i, int j) ; { ; /* use some local data */ ; *(char*)alloca(220) = 'L'; ; leaf_call(b, c, d, e, f, g, h, i, j); ; } ; ; int main() ; { ; nonleaf_call(0, 1, 2, 3, 4, 5, 6, 7, 8, 9); ; return 0; ; } ; output from psptoolchain-20111215-psp w/ gcc 4.9.3 00000000 <leaf_call>: 0: 27bdffd8 addiu sp,sp,-40 4: afbe0024 sw s8,36(sp) 8: 03a0f021 move s8,sp c: afc40000 sw a0,0(s8) 10: afc50004 sw a1,4(s8) 14: afc60008 sw a2,8(s8) 18: afc7000c sw a3,12(s8) 1c: afc80010 sw t0,16(s8) 20: afc90014 sw t1,20(s8) 24: afca0018 sw t2,24(s8) 28: afcb001c sw t3,28(s8) 2c: 03c0e821 move sp,s8 30: 8fbe0024 lw s8,36(sp) 34: 27bd0028 addiu sp,sp,40 38: 03e00008 jr ra 3c: 00000000 nop 00000040 <nonleaf_call>: 40: 27bdffd0 addiu sp,sp,-48 ; | 44: afbf002c sw ra,44(sp) ; | 48: afbe0028 sw s8,40(sp) ; | prolog 4c: 03a0f021 move s8,sp ; / frame pointer (note: with offset to frame start, but static compared to sp) 50: afc40008 sw a0,8(s8) ; \ 54: afc5000c sw a1,12(s8) ; | 58: afc60010 sw a2,16(s8) ; | 5c: afc70014 sw a3,20(s8) ; | 60: afc80018 sw t0,24(s8) ; | in args 0,1,2,3,4,5,6,7 -> temp space in local area 64: afc9001c sw t1,28(s8) ; | 68: afca0020 sw t2,32(s8) ; | 6c: afcb0024 sw t3,36(s8) ; | 70: 27bdff18 addiu sp,sp,-232 ; alloca(220) - with padding to guarantee alignment 74: 27a20008 addiu v0,sp,8 ; | 78: 24420007 addiu v0,v0,7 ; | 7c: 000210c2 srl v0,v0,0x3 ; | start of alloca()'d memory -> v1, by ... 80: 000210c0 sll v0,v0,0x3 ; | ... using v0 as helper to align to 8b 84: 00401821 move v1,v0 ; | 88: 2402004c li v0,76 ; 'L' -> v0, and... 8c: a0620000 sb v0,0(v1) ; ... store in local area (of alloca()'d space) 90: 8fc20034 lw v0,52(s8) ; arg 8 (fetched from prev frame's param area), and ... 94: afa20000 sw v0,0(sp) ; ... "pushed" onto stack 98: 8fc4000c lw a0,12(s8) ; | 9c: 8fc50010 lw a1,16(s8) ; | a0: 8fc60014 lw a2,20(s8) ; | a4: 8fc70018 lw a3,24(s8) ; | arg 0,1,2,3,4,5,6 (fetched from local area stored to above) a8: 8fc8001c lw t0,28(s8) ; | (t0 = a4) ac: 8fc90020 lw t1,32(s8) ; | (t1 = a5) b0: 8fca0024 lw t2,36(s8) ; | (t2 = a6) b4: 8fcb0030 lw t3,48(s8) ; | (t3 = a7) b8: 0c000000 jal 0 <leaf_call> ; call and ret addr -> ra bc: 00000000 nop ; branch delay slot c0: 03c0e821 move sp,s8 ; | c4: 8fbf002c lw ra,44(sp) ; | c8: 8fbe0028 lw s8,40(sp) ; | cc: 27bd0030 addiu sp,sp,48 ; | epilog d0: 03e00008 jr ra ; | d4: 00000000 nop ; | branch delay slot 000000d8 <main>: d8: 27bdfff0 addiu sp,sp,-16 ; | dc: afbf000c sw ra,12(sp) ; | e0: afbe0008 sw s8,8(sp) ; | prolog e4: 03a0f021 move s8,sp ; | frame pointer (note: with offset to frame start, but static compared to sp) e8: 24020008 li v0,8 ; arg 8 ec: afa20000 sw v0,0(sp) ; ... "pushed" onto stack f0: 24020009 li v0,9 ; arg 9 f4: afa20004 sw v0,4(sp) ; ... "pushed" onto stack f8: 00002021 move a0,zero ; arg 0 fc: 24050001 li a1,1 ; arg 1 100: 24060002 li a2,2 ; arg 2 104: 24070003 li a3,3 ; arg 3 108: 24080004 li t0,4 ; arg 4 (t0 = a4) 10c: 24090005 li t1,5 ; arg 5 (t1 = a5) 110: 240a0006 li t2,6 ; arg 6 (t2 = a6) 114: 240b0007 li t3,7 ; arg 7 (t3 = a7) 118: 0c000000 jal 0 <leaf_call> ; call and ret addr -> ra 11c: 00000000 nop ; branch delay slot 120: 00001021 move v0,zero ; return value 124: 03c0e821 move sp,s8 ; | 128: 8fbf000c lw ra,12(sp) ; | 12c: 8fbe0008 lw s8,8(sp) ; | 130: 27bd0010 addiu sp,sp,16 ; | epilog 134: 03e00008 jr ra ; | 138: 00000000 nop ; | branch delay slot ; ------------- with var args to see spilling -----------> ; #include <stdlib.h> ; #include <stdarg.h> ; ; void leaf_call(int b, int c, int d, int e, int f, int g, int h, int i, int j) ; { ; } ; ; void nonleaf_call(int a, ...) ; { ; int b, c, d, e, f, g, h, i, j; ; va_list ap; ; va_start(ap, a); ; b = va_arg(ap, int); ; c = va_arg(ap, int); ; d = va_arg(ap, int); ; e = va_arg(ap, int); ; f = va_arg(ap, int); ; g = va_arg(ap, int); ; h = va_arg(ap, int); ; i = va_arg(ap, int); ; j = va_arg(ap, int); ; /* use some local data */ ; *(char*)alloca(220) = 'L'; ; leaf_call(b, c, d, e, f, g, h, i, j); ; } ; ; int main() ; { ; nonleaf_call(0, 1, 2, 3, 4, 5, 6, 7, 8, 9); ; return 0; ; } ; output from psptoolchain-20111215-psp w/ gcc 4.9.3 00000000 <leaf_call>: 0: 27bdffd8 addiu sp,sp,-40 4: afbe0024 sw s8,36(sp) 8: 03a0f021 move s8,sp c: afc40000 sw a0,0(s8) 10: afc50004 sw a1,4(s8) 14: afc60008 sw a2,8(s8) 18: afc7000c sw a3,12(s8) 1c: afc80010 sw t0,16(s8) 20: afc90014 sw t1,20(s8) 24: afca0018 sw t2,24(s8) 28: afcb001c sw t3,28(s8) 2c: 03c0e821 move sp,s8 30: 8fbe0024 lw s8,36(sp) 34: 27bd0028 addiu sp,sp,40 38: 03e00008 jr ra 3c: 00000000 nop 00000040 <nonleaf_call>: 40: 27bdffa0 addiu sp,sp,-96 ; | leaving 32b extra space adjacent to prev frame's param area for spilling 44: afbf003c sw ra,60(sp) ; | 48: afbe0038 sw s8,56(sp) ; | prolog 4c: 03a0f021 move s8,sp ; / frame pointer (note: with offset to frame start, but static compared to sp) 50: afc50044 sw a1,68(s8) ; \ 54: afc60048 sw a2,72(s8) ; | 58: afc7004c sw a3,76(s8) ; | 5c: afc80050 sw t0,80(s8) ; | in args 1,2,3,4,5,6,7 -> spill area in current frame (adjacent to prev frame's param area) 60: afc90054 sw t1,84(s8) ; | 64: afca0058 sw t2,88(s8) ; | 68: afcb005c sw t3,92(s8) ; | 6c: afc40030 sw a0,48(s8) ; in arg 0 -> temp space in local area 70: 27c20060 addiu v0,s8,96 ; v0 initialized to point ... 74: 2442ffe4 addiu v0,v0,-28 ; ... to start of spill area (96 - 28 = 68, where we spilled a1) 78: afc2002c sw v0,44(s8) ; store read ptr in local area 7c: 8fc2002c lw v0,44(s8) ; | get read pointer in v0 (pointless here, but part of following pattern) ... 80: 24430004 addiu v1,v0,4 ; | ... advance ... 84: afc3002c sw v1,44(s8) ; | in arg 1 ... store again ... 88: 8c420000 lw v0,0(v0) ; | ... arg -> v0 (using pre-inc read location), then ... 8c: afc20008 sw v0,8(s8) ; / ... write to local area on stack for later 90: 8fc2002c lw v0,44(s8) ; \ 94: 24430004 addiu v1,v0,4 ; | 98: afc3002c sw v1,44(s8) ; | in arg 2 9c: 8c420000 lw v0,0(v0) ; | a0: afc2000c sw v0,12(s8) ; / a4: 8fc2002c lw v0,44(s8) ; \ a8: 24430004 addiu v1,v0,4 ; | ac: afc3002c sw v1,44(s8) ; | in arg 3 b0: 8c420000 lw v0,0(v0) ; | b4: afc20010 sw v0,16(s8) ; / b8: 8fc2002c lw v0,44(s8) ; \ bc: 24430004 addiu v1,v0,4 ; | c0: afc3002c sw v1,44(s8) ; | in arg 4 c4: 8c420000 lw v0,0(v0) ; | c8: afc20014 sw v0,20(s8) ; / cc: 8fc2002c lw v0,44(s8) ; \ d0: 24430004 addiu v1,v0,4 ; | d4: afc3002c sw v1,44(s8) ; | in arg 5 d8: 8c420000 lw v0,0(v0) ; | dc: afc20018 sw v0,24(s8) ; / e0: 8fc2002c lw v0,44(s8) ; \ e4: 24430004 addiu v1,v0,4 ; | e8: afc3002c sw v1,44(s8) ; | in arg 6 ec: 8c420000 lw v0,0(v0) ; | f0: afc2001c sw v0,28(s8) ; / f4: 8fc2002c lw v0,44(s8) ; \ f8: 24430004 addiu v1,v0,4 ; | fc: afc3002c sw v1,44(s8) ; | in arg 7 100: 8c420000 lw v0,0(v0) ; | 104: afc20020 sw v0,32(s8) ; / 108: 8fc2002c lw v0,44(s8) ; \ 10c: 24430004 addiu v1,v0,4 ; | 110: afc3002c sw v1,44(s8) ; | in arg 8 114: 8c420000 lw v0,0(v0) ; | 118: afc20024 sw v0,36(s8) ; / 11c: 8fc2002c lw v0,44(s8) ; \ 120: 24430004 addiu v1,v0,4 ; | 124: afc3002c sw v1,44(s8) ; | in arg 9 128: 8c420000 lw v0,0(v0) ; | 12c: afc20028 sw v0,40(s8) ; / 130: 27bdff18 addiu sp,sp,-232 ; alloca(220) - with padding to guarantee alignment 134: 27a20008 addiu v0,sp,8 ; | 138: 24420007 addiu v0,v0,7 ; | 13c: 000210c2 srl v0,v0,0x3 ; | start of alloca()'d memory -> v1, by ... 140: 000210c0 sll v0,v0,0x3 ; | ... using v0 as helper to align to 8b 144: 00401821 move v1,v0 ; | 148: 2402004c li v0,76 ; 'L' -> v0, and... 14c: a0620000 sb v0,0(v1) ; ... store in local area (of alloca()'d space) 150: 8fc20028 lw v0,40(s8) ; arg 8 (fetched from local area stored to above) and ... 154: afa20000 sw v0,0(sp) ; ... "pushed" onto stack 158: 8fc40008 lw a0,8(s8) ; | 15c: 8fc5000c lw a1,12(s8) ; | 160: 8fc60010 lw a2,16(s8) ; | 164: 8fc70014 lw a3,20(s8) ; | arg 0,1,2,3,4,5,6 (fetched from local area stored to above) 168: 8fc80018 lw t0,24(s8) ; | (t0 = a4) 16c: 8fc9001c lw t1,28(s8) ; | (t1 = a5) 170: 8fca0020 lw t2,32(s8) ; | (t2 = a6) 174: 8fcb0024 lw t3,36(s8) ; | (t3 = a7) 178: 0c000000 jal 0 <leaf_call> ; call and ret addr -> ra 17c: 00000000 nop ; branch delay slot 180: 03c0e821 move sp,s8 ; | 184: 8fbf003c lw ra,60(sp) ; | 188: 8fbe0038 lw s8,56(sp) ; | 18c: 27bd0060 addiu sp,sp,96 ; | epilog 190: 03e00008 jr ra ; | 194: 00000000 nop | branch delay slot 00000198 <main>: 198: 27bdfff0 addiu sp,sp,-16 ; | 19c: afbf000c sw ra,12(sp) ; | 1a0: afbe0008 sw s8,8(sp) ; | prolog 1a4: 03a0f021 move s8,sp ; | frame pointer (note: with offset to frame start, but static compared to sp) 1a8: 24020008 li v0,8 ; arg 8 1ac: afa20000 sw v0,0(sp) ; ... "pushed" onto stack 1b0: 24020009 li v0,9 ; arg 9 1b4: afa20004 sw v0,4(sp) ; ... "pushed" onto stack 1b8: 00002021 move a0,zero ; arg 0 1bc: 24050001 li a1,1 ; arg 1 1c0: 24060002 li a2,2 ; arg 2 1c4: 24070003 li a3,3 ; arg 3 1c8: 24080004 li t0,4 ; arg 4 (t0 = a4) 1cc: 24090005 li t1,5 ; arg 5 (t1 = a5) 1d0: 240a0006 li t2,6 ; arg 6 (t2 = a6) 1d4: 240b0007 li t3,7 ; arg 7 (t3 = a7) 1d8: 0c000000 jal 0 <leaf_call> ; call and ret addr -> ra 1dc: 00000000 nop ; branch delay slot 1e0: 00001021 move v0,zero ; return value 1e4: 03c0e821 move sp,s8 ; | 1e8: 8fbf000c lw ra,12(sp) ; | 1ec: 8fbe0008 lw s8,8(sp) ; | 1f0: 27bd0010 addiu sp,sp,16 ; | epilog 1f4: 03e00008 jr ra ; | 1f8: 00000000 nop ; | branch delay slot ; ------------- var args with ints and floats to see spilling (which remains only a?-a7 regs), b/c doubles are passed via them and floats are promoted to doubles in (...) -----------> ; #include <stdlib.h> ; #include <stdarg.h> ; ; void leaf_call(int b, int c, int d, int e, float f, float g, int h, int i, float j) ; { ; } ; ; void nonleaf_call(int a, ...) ; { ; int b, c, d, e, h, i; ; float f, g, j; ; va_list ap; ; va_start(ap, a); ; b = va_arg(ap, int); ; c = va_arg(ap, int); ; d = va_arg(ap, int); ; e = va_arg(ap, int); ; f = (float)va_arg(ap, double); ; g = (float)va_arg(ap, double); ; h = va_arg(ap, int); ; i = va_arg(ap, int); ; j = (float)va_arg(ap, double); ; /* use some local data */ ; *(char*)alloca(220) = 'L'; ; leaf_call(b, c, d, e, f, g, h, i, j); ; } ; ; int main() ; { ; nonleaf_call(0, 1, 2, 3, 4, 5.f, 6.f, 7, 8, 9.f); ; return 0; ; } ; output from psptoolchain-20111215-psp w/ gcc 4.9.3 00000000 <leaf_call>: 0: 27bdffd0 addiu sp,sp,-48 4: afbe002c sw s8,44(sp) 8: 03a0f021 move s8,sp c: afc40000 sw a0,0(s8) 10: afc50004 sw a1,4(s8) 14: afc60008 sw a2,8(s8) 18: afc7000c sw a3,12(s8) 1c: e7cc0010 swc1 $f12,16(s8) 20: e7cd0014 swc1 $f13,20(s8) 24: afc80018 sw t0,24(s8) 28: afc9001c sw t1,28(s8) 2c: e7ce0020 swc1 $f14,32(s8) 30: 03c0e821 move sp,s8 34: 8fbe002c lw s8,44(sp) 38: 27bd0030 addiu sp,sp,48 3c: 03e00008 jr ra 40: 00000000 nop 00000044 <nonleaf_call>: 44: 27bdffa8 addiu sp,sp,-88 ; | leaving 32b extra space adjacent to prev frame's param area for spilling 48: afbf0034 sw ra,52(sp) ; | 4c: afbe0030 sw s8,48(sp) ; | prolog 50: 03a0f021 move s8,sp ; / frame pointer (note: with offset to frame start, but static compared to sp) 54: afc5003c sw a1,60(s8) ; \ 58: afc60040 sw a2,64(s8) ; | 5c: afc70044 sw a3,68(s8) ; | 60: afc80048 sw t0,72(s8) ; | in args 1,2,3,4,5 (spread out over 7 param regs) -> spill area in current frame (adjacent to prev frame's param area) 64: afc9004c sw t1,76(s8) ; | this one is just padding 68: afca0050 sw t2,80(s8) ; | | 6c: afcb0054 sw t3,84(s8) ; | | this is arg 5, passed as a double, spilled like integers 70: afc40028 sw a0,40(s8) ; in arg 0 -> temp space in local area 74: 27c20058 addiu v0,s8,88 ; v0 initialized to point ... 78: 2442ffe4 addiu v0,v0,-28 ; ... to start of spill area (88 - 28 = 60, where we spilled a1) 7c: afc20024 sw v0,36(s8) ; store read ptr in local area 80: 8fc20024 lw v0,36(s8) ; | get read pointer in v0 (pointless here, but part of following pattern) ... 84: 24430004 addiu v1,v0,4 ; | ... advance ... 88: afc30024 sw v1,36(s8) ; | in arg 1 ... store again ... 8c: 8c420000 lw v0,0(v0) ; | ... arg -> v0 (using pre-inc read location), then ... 90: afc20000 sw v0,0(s8) ; / ... write to local area on stack for later 94: 8fc20024 lw v0,36(s8) ; \ 98: 24430004 addiu v1,v0,4 ; | 9c: afc30024 sw v1,36(s8) ; | in arg 2 a0: 8c420000 lw v0,0(v0) ; | a4: afc20004 sw v0,4(s8) ; / a8: 8fc20024 lw v0,36(s8) ; \ ac: 24430004 addiu v1,v0,4 ; | b0: afc30024 sw v1,36(s8) ; | in arg 3 b4: 8c420000 lw v0,0(v0) ; | b8: afc20008 sw v0,8(s8) ; / bc: 8fc20024 lw v0,36(s8) ; \ c0: 24430004 addiu v1,v0,4 ; | c4: afc30024 sw v1,36(s8) ; | in arg 4 c8: 8c420000 lw v0,0(v0) ; | cc: afc2000c sw v0,12(s8) ; / d0: 8fc20024 lw v0,36(s8) ; \ get read ptr in v0 d4: 24430007 addiu v1,v0,7 ; | | d8: 2402fff8 li v0,-8 ; | | align dc: 00621024 and v0,v1,v0 ; | | e0: 24430008 addiu v1,v0,8 ; | advance read ptr to point to double e4: afc30024 sw v1,36(s8) ; | restore read ptr e8: 8c430004 lw v1,4(v0) ; | in arg 5 | ec: 8c420000 lw v0,0(v0) ; | | load both parts of double ... f0: 00402021 move a0,v0 ; | | ... and store in a{0,1} pair (used to pass doubles, used in next call) f4: 00602821 move a1,v1 ; | / f8: 0c000000 jal 0 <leaf_call> ; | \ call to cast double to float, returned in f0 fc: 00000000 nop ; | | NOTE: not a call to leaf_call() (objdump done from .o file, not finally linked executable) 100: e7c00010 swc1 $f0,16(s8) ; / write float to local area on stack for later 104: 8fc20024 lw v0,36(s8) ; \ 108: 24430007 addiu v1,v0,7 ; | 10c: 2402fff8 li v0,-8 ; | 110: 00621024 and v0,v1,v0 ; | 114: 24430008 addiu v1,v0,8 ; | 118: afc30024 sw v1,36(s8) ; | 11c: 8c430004 lw v1,4(v0) ; | in arg 6 120: 8c420000 lw v0,0(v0) ; | 124: 00402021 move a0,v0 ; | 128: 00602821 move a1,v1 ; | 12c: 0c000000 jal 0 <leaf_call> ; | 130: 00000000 nop ; | 134: e7c00014 swc1 $f0,20(s8) ; / 138: 8fc20024 lw v0,36(s8) ; \ 13c: 24430004 addiu v1,v0,4 ; | 140: afc30024 sw v1,36(s8) ; | in arg 7 144: 8c420000 lw v0,0(v0) ; | 148: afc20018 sw v0,24(s8) ; / 14c: 8fc20024 lw v0,36(s8) ; \ 150: 24430004 addiu v1,v0,4 ; | 154: afc30024 sw v1,36(s8) ; | in arg 8 158: 8c420000 lw v0,0(v0) ; | 15c: afc2001c sw v0,28(s8) ; / 160: 8fc20024 lw v0,36(s8) ; \ 164: 24430007 addiu v1,v0,7 ; | 168: 2402fff8 li v0,-8 ; | 16c: 00621024 and v0,v1,v0 ; | 170: 24430008 addiu v1,v0,8 ; | 174: afc30024 sw v1,36(s8) ; | 178: 8c430004 lw v1,4(v0) ; | in arg 9 17c: 8c420000 lw v0,0(v0) ; | 180: 00402021 move a0,v0 ; | 184: 00602821 move a1,v1 ; | 188: 0c000000 jal 0 <leaf_call> ; | 18c: 00000000 nop ; | 190: e7c00020 swc1 $f0,32(s8) ; / 194: 27bdff18 addiu sp,sp,-232 ; alloca(220) - with padding to guarantee alignment 198: 03a01021 move v0,sp ; | 19c: 24420007 addiu v0,v0,7 ; | 1a0: 000210c2 srl v0,v0,0x3 ; | start of alloca()'d memory -> v1, by ... 1a4: 000210c0 sll v0,v0,0x3 ; | ... using v0 as helper to align to 8b 1a8: 00401821 move v1,v0 ; | 1ac: 2402004c li v0,76 ; 'L' -> v0, and... 1b0: a0620000 sb v0,0(v1) ; ... store in local area (of alloca()'d space) 1b4: 8fc40000 lw a0,0(s8) ; | 1b8: 8fc50004 lw a1,4(s8) ; | 1bc: 8fc60008 lw a2,8(s8) ; | arg 0,1,2,3 (int args, fetched from local area stored to above) 1c0: 8fc7000c lw a3,12(s8) ; | 1c4: c7cc0010 lwc1 $f12,16(s8) ; arg 4 (float, fetched from local area stored to above) 1c8: c7cd0014 lwc1 $f13,20(s8) ; arg 5 (float, fetched from local area stored to above) 1cc: 8fc80018 lw t0,24(s8) ; arg 6 (int, fetched from local area stored to above, t0 = a4) 1d0: 8fc9001c lw t1,28(s8) ; arg 7 (int, fetched from local area stored to above, t1 = a5) 1d4: c7ce0020 lwc1 $f14,32(s8) ; arg 9 (float, fetched from local area stored to above) 1d8: 0c000000 jal 0 <leaf_call> ; call and ret addr -> ra 1dc: 00000000 nop ; branch delay slot 1e0: 03c0e821 move sp,s8 ; | 1e4: 8fbf0034 lw ra,52(sp) ; | 1e8: 8fbe0030 lw s8,48(sp) ; | 1ec: 27bd0058 addiu sp,sp,88 ; | epilog 1f0: 03e00008 jr ra ; | 1f4: 00000000 nop ; | branch delay slot 000001f8 <main>: 1f8: 27bdffe0 addiu sp,sp,-32 ; | 1fc: afbf001c sw ra,28(sp) ; | 200: afbe0018 sw s8,24(sp) ; | prolog 204: 03a0f021 move s8,sp ; / frame pointer (note: with offset to frame start, but static compared to sp) 208: 8f8a0000 lw t2,0(gp) ; \ 20c: 8f8b0004 lw t3,4(gp) ; / arg 5 (t1,t2 = a4,a5), as double b/c of vararg, effectively skipping t1 (=a5) 210: 8f820008 lw v0,8(gp) ; \ 214: 8f83000c lw v1,12(gp) ; | arg 6, as double b/c of vararg, via v0 and v1 ... 218: afa20000 sw v0,0(sp) ; | 21c: afa30004 sw v1,4(sp) ; | ... "pushed" onto stack 220: 24020007 li v0,7 ; arg 7 224: afa20008 sw v0,8(sp) ; ... "pushed" onto stack 228: 24020008 li v0,8 ; arg 8 22c: afa2000c sw v0,12(sp) ; ... "pushed" onto stack 230: 8f820010 lw v0,16(gp) ; | 234: 8f830014 lw v1,20(gp) ; | arg 9, as double b/c of vararg ... 238: afa20010 sw v0,16(sp) ; | 23c: afa30014 sw v1,20(sp) ; | ... "pushed" onto stack 240: 00002021 move a0,zero ; arg 0 244: 24050001 li a1,1 ; arg 1 248: 24060002 li a2,2 ; arg 2 24c: 24070003 li a3,3 ; arg 3 250: 24080004 li t0,4 ; arg 4 (t0 = a4) 254: 0c000000 jal 0 <leaf_call> ; call and ret addr -> ra 258: 00000000 nop ; branch delay slot 25c: 00001021 move v0,zero ; return value 260: 03c0e821 move sp,s8 ; | 264: 8fbf001c lw ra,28(sp) ; | 268: 8fbe0018 lw s8,24(sp) ; | 26c: 27bd0020 addiu sp,sp,32 ; | epilog 270: 03e00008 jr ra ; | 274: 00000000 nop ; | branch delay slot ; --------------------- further notes -------------------> ; when passing less arguments than stack params, involving an ellipsis, spill area still spills all registers, ; excluding named ones, e.g.: ; ; void c(int a, ...) { ... } ; c(0, 1, 2, 3, 4); ; ; contains as spilling code same as above: 84: afc5002c sw a1,44(s8) 88: afc60030 sw a2,48(s8) 8c: afc70034 sw a3,52(s8) 90: afc80038 sw t0,56(s8) 94: afc9003c sw t1,60(s8) 98: afca0040 sw t2,64(s8) 9c: afcb0044 sw t3,68(s8) ; vim: ft=asm