Mercurial > pub > dyncall > dyncall
comparison dyncallback/dyncall_callback_mips_o32_gas.s @ 106:d595eb90efdd
- dyncallback/mips_o32 fixes for when using -O? optimization flags; basically not using $fp directly, anymore
| author | cslag |
|---|---|
| date | Sat, 11 Jun 2016 13:07:23 +0200 |
| parents | dbca6763f2be |
| children | f5453308ff36 |
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| 105:ca36937b4613 | 106:d595eb90efdd |
|---|---|
| 50 /* param: spill:16 */ | 50 /* param: spill:16 */ |
| 51 subu $sp, 56 /* open frame */ | 51 subu $sp, 56 /* open frame */ |
| 52 sw $ra, 20($sp) /* save link register */ | 52 sw $ra, 20($sp) /* save link register */ |
| 53 | 53 |
| 54 .frame $fp,56,$31 /* specify our frame: fp,size,lr; creates virt $fp */ | 54 .frame $fp,56,$31 /* specify our frame: fp,size,lr; creates virt $fp */ |
| 55 | 55 /* code below doesn't use $fp though, as n/a with -O1 */ |
| 56 /* Init return value */ | 56 /* Init return value */ |
| 57 sw $zero, 32($sp) | 57 sw $zero, 32($sp) |
| 58 sw $zero, 36($sp) | 58 sw $zero, 36($sp) |
| 59 | 59 |
| 60 /* Store the arguments passed via registers somewhere for dcArg* to access. */ | 60 /* Store the arguments passed via registers somewhere for dcArg* to access. */ |
| 61 /* For $4-$7 ($a0-$a3), use dedicated spill area (caller doesn't spill, but */ | 61 /* For $4-$7 ($a0-$a3), use dedicated spill area (caller doesn't spill, but */ |
| 62 /* provides it at end of _caller's_ frame, so $fp points right to it). */ | 62 /* provides it at end of _caller's_ frame, so $fp points right to it). */ |
| 63 /* For $f12 and $f14 use our space (in local data), which is adjacent. */ | 63 /* For $f12 and $f14 use our space (in local data), which is adjacent. */ |
| 64 s.d $f12, 40($sp) /* -16($fp) */ | 64 s.d $f12, 40($sp) /* -16($fp) */ |
| 65 s.d $f14, 48($sp) /* -8($fp) */ | 65 s.d $f14, 48($sp) /* -8($fp) */ |
| 66 sw $4, 0($fp) | 66 sw $4, 56($sp) /* 0($fp) */ |
| 67 sw $5, 4($fp) | 67 sw $5, 60($sp) /* 4($fp) */ |
| 68 sw $6, 8($fp) | 68 sw $6, 64($sp) /* 8($fp) */ |
| 69 sw $7, 12($fp) | 69 sw $7, 68($sp) /* 12($fp) */ |
| 70 | 70 |
| 71 /* Init DCArg, which contains reg_count and stackptr* to the args. Point */ | 71 /* Init DCArg, which contains reg_count and stackptr* to the args. Point */ |
| 72 /* stackptr to the area where the non-float args start (which is at $fp). */ | 72 /* stackptr to the area where the non-float args start (which is at $fp). */ |
| 73 addiu $4, $sp, 56 /* non-$fp replacement for: */ | |
| 74 sw $4, 28($sp) /* sw $fp, 28($sp) */ | |
| 73 sw $zero, 24($sp) | 75 sw $zero, 24($sp) |
| 74 sw $fp, 28($sp) | |
| 75 | 76 |
| 76 /* Prepare callback handler call. */ | 77 /* Prepare callback handler call. */ |
| 77 move $4, $12 /* Param 0 = DCCallback*, $12 ($t4) holds pointer to thunk */ | 78 move $4, $12 /* Param 0 = DCCallback*, $12 ($t4) holds pointer to thunk */ |
| 78 addiu $5, $sp, 24 /* Param 1 = DCArgs*, pointer to where pointer to args is stored */ | 79 addiu $5, $sp, 24 /* Param 1 = DCArgs*, pointer to where pointer to args is stored */ |
| 79 addiu $6, $sp, 32 /* Param 2 = results pointer to 8b of local data on stack */ | 80 addiu $6, $sp, 32 /* Param 2 = results pointer to 8b of local data on stack */ |