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| author | Test_User <hax@andrewyu.org> | 2023-04-26 15:01:37 -0400 |
|---|---|---|
| committer | Test_User <hax@andrewyu.org> | 2023-04-26 15:01:37 -0400 |
| commit | 868e583b8d8c7dbeb8478202ea38b7de3f64e151 (patch) | |
| tree | 689eb98eb36bba660b603233f6b8551d93fada7d | |
| parent | 8b4b6b2a3048aa5bfa369e58ec020706b543cb72 (diff) | |
| download | specification-868e583b8d8c7dbeb8478202ea38b7de3f64e151.tar.gz specification-868e583b8d8c7dbeb8478202ea38b7de3f64e151.zip | |
Add iret* instructions
| -rw-r--r-- | cpu/instructions/execution_control/iretde.txt | 14 | ||||
| -rw-r--r-- | cpu/instructions/execution_control/irete.txt | 14 | ||||
| -rw-r--r-- | cpu/instructions/execution_control/ireth.txt | 14 | ||||
| -rw-r--r-- | cpu/interrupts/execution.txt | 2 |
4 files changed, 43 insertions, 1 deletions
diff --git a/cpu/instructions/execution_control/iretde.txt b/cpu/instructions/execution_control/iretde.txt new file mode 100644 index 0000000..9e13fa5 --- /dev/null +++ b/cpu/instructions/execution_control/iretde.txt @@ -0,0 +1,14 @@ +Number of parameters: 0 + +Usage: + iretde + +Effect: + ../../exceptions/execution.txt + + IP is set to OIPDE + PR is set to OPRDE + Will be considered to be in the previous exception handler + +Exceptions: + `Invalid operation` if not currently executing a double excetion handler diff --git a/cpu/instructions/execution_control/irete.txt b/cpu/instructions/execution_control/irete.txt new file mode 100644 index 0000000..273ea59 --- /dev/null +++ b/cpu/instructions/execution_control/irete.txt @@ -0,0 +1,14 @@ +Number of parameters: 0 + +Usage: + irete + +Effect: + ../../exceptions/execution.txt + + IP is set to OIPE + PR is set to OPRE + No longer considered to be in an exception handler + +Exceptions: + `Invalid operation` if not currently executing an excetion handler diff --git a/cpu/instructions/execution_control/ireth.txt b/cpu/instructions/execution_control/ireth.txt new file mode 100644 index 0000000..54c92c8 --- /dev/null +++ b/cpu/instructions/execution_control/ireth.txt @@ -0,0 +1,14 @@ +Number of parameters: 0 + +Usage: + ireth + +Effect: + ../../interrupts/execution.txt + + IP is set to OIPH + PR is set to OPRH + Hardware interrupts are allowed again + +Exceptions: + `Invalid operation` if not currently executing a hardware interrupt diff --git a/cpu/interrupts/execution.txt b/cpu/interrupts/execution.txt index 858334c..dcff30e 100644 --- a/cpu/interrupts/execution.txt +++ b/cpu/interrupts/execution.txt @@ -3,7 +3,7 @@ When an interrupt occurs: OIPI gets set to the IP from the previous code running PR is set to all 1s -The next interrupt will not occur until after the current processing has been finished via `ireti` +The next interrupt will not occur until after the current processing has been finished via `ireth` When returning via ireth: PR is set to OPRI |