gh-mirror/mikepaul-LuaJIT
1
0
Fork 0
mirror of https://github.com/LuaJIT/LuaJIT.git synced 2025-02-08 07:34:07 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Avoid saving/restoring floating point registers when entering the interpreter.

Browse Source 
We only need to worry about doing this if we actually use those
floating point registers.
This commit is contained in:
Michael Munday 2017-01-17 14:05:31 -05:00
parent 695c59703c
commit e151edea53
1 changed files with 1 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
src/vm_s390x.dasc
View File

@ -103,26 +103,10 @@
|.macro saveregs
| stmg r6, r15, SAVE_GPRS_P
| lay sp, -CFRAME_SPACE(sp) // Allocate stack frame.
| // TODO: save backchain?
| std f8, SAVE_FPR8 // f8-f15 are callee-saved.
| std f9, SAVE_FPR9
| std f10, SAVE_FPR10
| std f11, SAVE_FPR11
| std f12, SAVE_FPR12
| std f13, SAVE_FPR13
| std f14, SAVE_FPR14
| std f15, SAVE_FPR15
| // f8-f15 are also callee-save but are not currently used in the interpreter.
|.endmacro
|
|.macro restoreregs
| ld f8, SAVE_FPR8 // f8-f15 are callee-saved.
| ld f9, SAVE_FPR9
| ld f10, SAVE_FPR10
| ld f11, SAVE_FPR11
| ld f12, SAVE_FPR12
| ld f13, SAVE_FPR13
| ld f14, SAVE_FPR14
| ld f15, SAVE_FPR15
| lmg r6, r15, SAVE_GPRS // Restores the stack pointer.
|.endmacro
|