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

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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
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18
src/vm_s390x.dasc
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@ -103,26 +103,10 @@
|.macro saveregs |.macro saveregs
| stmg r6, r15, SAVE_GPRS_P | stmg r6, r15, SAVE_GPRS_P
| lay sp, -CFRAME_SPACE(sp) // Allocate stack frame. | lay sp, -CFRAME_SPACE(sp) // Allocate stack frame.
| // TODO: save backchain? | // f8-f15 are also callee-save but are not currently used in the interpreter.
| 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
|.endmacro |.endmacro
| |
|.macro restoreregs |.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. | lmg r6, r15, SAVE_GPRS // Restores the stack pointer.
|.endmacro |.endmacro
| |