Bug 1134 - implement fminmax in ieee754fpu/soc
Summary: implement fminmax in ieee754fpu/soc
Status: CONFIRMED
Alias: None
Product: Libre-SOC's first SoC
Classification: Unclassified
Component: ALU (including IEEE754 16/32/64-bit FPU) (show other bugs)
Version: unspecified
Hardware: PC Linux
: --- enhancement
Assignee: Jacob Lifshay
URL:
Depends on: 1135
Blocks: 1025
  Show dependency tree / graph
 
Reported: 2023-08-09 23:59 BST by Jacob Lifshay
Modified: 2024-01-08 01:04 GMT (History)
2 users (show)

See Also:
NLnet milestone: ---
total budget (EUR) for completion of task and all subtasks: 0
budget (EUR) for this task, excluding subtasks' budget: 0
parent task for budget allocation:
child tasks for budget allocation:
The table of payments (in EUR) for this task; TOML format:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Jacob Lifshay 2023-08-09 23:59:21 BST 
3 stages to be assembled into a 1-stage pipeline:

1. input unpacking & adjust for magnitude comparison (mostly abs)
    not using existing unpack stage since that computes unbiased exponent
    which is unnecessary and undesired.
2. compare inputs and nan-detection
3. mux output with optional nan-quieting

https://bugs.libre-soc.org/show_bug.cgi?id=1135#c20
since the FPSCR classes task is quite small, I think we should allocate the budget for that task through this task.