# fpu

**Repository Path**: springlevi/fpu

## Basic Information

- **Project Name**: fpu
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 0
- **Created**: 2025-07-15
- **Last Updated**: 2025-09-22

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# MULT

## **Simulation Status**

![输入图片说明](d923708735a6f7863bb7f2766363db4.jpg)

## Design Gap

- **特殊值未处理**





# ADD_SUB

## Simulation Status

> ```
> Running Icarus Verilog simulator...
> Starting IEEE 754 FPU Test
> ==========================
> VCD info: dumping is suppressed.
> Test 1:
> A:
>   Hex: 3f800000 | Sign: 0 | Exp: 7f | Frac: 000000 | Value: 1.000000
> B:
>   Hex: 40000000 | Sign: 0 | Exp: 80 | Frac: 000000 | Value: 2.000000
> Operation:      Add
> Actual Result:
>   Hex: 40400000 | Sign: 0 | Exp: 80 | Frac: 400000 | Value: 3.000000
> Actual Error: 0
> EXPECTED RESULT:
>   Hex: 40400000 | Sign: 0 | Exp: 80 | Frac: 400000 | Value: 3.000000
> Expected Error: 0
> >>> TEST PASSED <<<
> ------------------------------------------------
> Test 2:
> A:
>   Hex: 40a00000 | Sign: 0 | Exp: 81 | Frac: 200000 | Value: 5.000000
> B:
>   Hex: 40200000 | Sign: 0 | Exp: 80 | Frac: 200000 | Value: 2.500000
> Operation: Subtract
> Actual Result:
>   Hex: 40200000 | Sign: 0 | Exp: 80 | Frac: 200000 | Value: 2.500000
> Actual Error: 0
> EXPECTED RESULT:
>   Hex: 40200000 | Sign: 0 | Exp: 80 | Frac: 200000 | Value: 2.500000
> Expected Error: 0
> >>> TEST PASSED <<<
> ------------------------------------------------
> Test 3:
> A:
>   Hex: c0400000 | Sign: 1 | Exp: 80 | Frac: 400000 | Value: -3.000000
> B:
>   Hex: 3fc00000 | Sign: 0 | Exp: 7f | Frac: 400000 | Value: 1.500000
> Operation:      Add
> Actual Result:
>   Hex: bfc00000 | Sign: 1 | Exp: 7f | Frac: 400000 | Value: -1.500000
> Actual Error: 0
> EXPECTED RESULT:
>   Hex: bfc00000 | Sign: 1 | Exp: 7f | Frac: 400000 | Value: -1.500000
> Expected Error: 0
> >>> TEST PASSED <<<
> ------------------------------------------------
> Test 4:
> A:
>   Hex: 00000001 | Sign: 0 | Exp: 00 | Frac: 000001 | Value: 0.000000
> B:
>   Hex: 00000001 | Sign: 0 | Exp: 00 | Frac: 000001 | Value: 0.000000
> Operation:      Add
> Actual Result:
>   Hex: 00000000 | Sign: 0 | Exp: 00 | Frac: 000000 | Value: 0.000000
> Actual Error: 1
> ERROR! Expected:
>   Hex: 00000002 | Sign: 0 | Exp: 00 | Frac: 000002 | Value: 0.000000
> Expected Error: 0
> >>> TEST FAILED <<<
> ------------------------------------------------
> Test 5:
> A:
>   Hex: 00000001 | Sign: 0 | Exp: 00 | Frac: 000001 | Value: 0.000000
> B:
>   Hex: 00000002 | Sign: 0 | Exp: 00 | Frac: 000002 | Value: 0.000000
> Operation: Subtract
> Actual Result:
>   Hex: 80000000 | Sign: 1 | Exp: 00 | Frac: 000000 | Value: -0.000000
> Actual Error: 1
> ERROR! Expected:
>   Hex: 00000001 | Sign: 0 | Exp: 00 | Frac: 000001 | Value: 0.000000
> Expected Error: 0
> >>> TEST FAILED <<<
> ------------------------------------------------
> Test 6:
> A:
>   Hex: 40400000 | Sign: 0 | Exp: 80 | Frac: 400000 | Value: 3.000000
> B:
>   Hex: 40400000 | Sign: 0 | Exp: 80 | Frac: 400000 | Value: 3.000000
> Operation: Subtract
> Actual Result:
>   Hex: 80000000 | Sign: 1 | Exp: 00 | Frac: 000000 | Value: -0.000000
> Actual Error: 0
> ERROR! Expected:
>   Hex: 00000000 | Sign: 0 | Exp: 00 | Frac: 000000 | Value: 0.000000
> Expected Error: 0
> >>> TEST FAILED <<<
> ------------------------------------------------
> Test 7:
> A:
>   Hex: 7f7fffff | Sign: 0 | Exp: fe | Frac: 7fffff | Value: 340282346638528859811704183484516925440.000000
> B:
>   Hex: 7f7fffff | Sign: 0 | Exp: fe | Frac: 7fffff | Value: 340282346638528859811704183484516925440.000000
> Operation:      Add
> Actual Result:
>   Hex: 7f800000 | Sign: 0 | Exp: ff | Frac: 000000 | Value: inf
> Actual Error: 1
> EXPECTED RESULT:
>   Hex: 7f800000 | Sign: 0 | Exp: ff | Frac: 000000 | Value: inf
> Expected Error: 1
> >>> TEST PASSED <<<
> ------------------------------------------------
> Test 8:
> A:
>   Hex: 00000000 | Sign: 0 | Exp: 00 | Frac: 000000 | Value: 0.000000
> B:
>   Hex: 80000000 | Sign: 1 | Exp: 00 | Frac: 000000 | Value: -0.000000
> Operation:      Add
> Actual Result:
>   Hex: 80000000 | Sign: 1 | Exp: 00 | Frac: 000000 | Value: -0.000000
> Actual Error: 0
> ERROR! Expected:
>   Hex: 00000000 | Sign: 0 | Exp: 00 | Frac: 000000 | Value: 0.000000
> Expected Error: 0
> >>> TEST FAILED <<<
> ------------------------------------------------
> Test 9:
> A:
>   Hex: 41200000 | Sign: 0 | Exp: 82 | Frac: 200000 | Value: 10.000000
> B:
>   Hex: 40a00000 | Sign: 0 | Exp: 81 | Frac: 200000 | Value: 5.000000
> Operation: Subtract
> Actual Result:
>   Hex: 40a00000 | Sign: 0 | Exp: 81 | Frac: 200000 | Value: 5.000000
> Actual Error: 0
> EXPECTED RESULT:
>   Hex: 40a00000 | Sign: 0 | Exp: 81 | Frac: 200000 | Value: 5.000000
> Expected Error: 0
> >>> TEST PASSED <<<
> ------------------------------------------------
> Test 10:
> A:
>   Hex: 3eaaaaab | Sign: 0 | Exp: 7d | Frac: 2aaaab | Value: 0.333333
> B:
>   Hex: 3eaaaaab | Sign: 0 | Exp: 7d | Frac: 2aaaab | Value: 0.333333
> Operation:      Add
> Actual Result:
>   Hex: 3f2aaaab | Sign: 0 | Exp: 7e | Frac: 2aaaab | Value: 0.666667
> Actual Error: 0
> EXPECTED RESULT:
>   Hex: 3f2aaaab | Sign: 0 | Exp: 7e | Frac: 2aaaab | Value: 0.666667
> Expected Error: 0
> >>> TEST PASSED <<<
> ------------------------------------------------
> 
> TEST SUMMARY:
> Tests run:    10
> Tests passed: 6
> Tests failed: 4
> Pass rate:    60.0%
> 
> Simulation finished
> ./top_module.v:143: $finish called at 100000 (1ps)
> Hint: Total mismatched samples is 0 out of 0 samples
> 
> Simulation finished at 100000 ps
> Mismatches: 0 in 0 samples
> ```





## Design Gap

- **特殊值未处理**
- +0和-0的符号结果不符合标准
- 某些计算结果仍不正确