Difference between revisions of "IOP16 Register File"
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| − | + | = Register File = | |
<video type="youtube">qPvwggaQ4w0</video> | <video type="youtube">qPvwggaQ4w0</video> | ||
* Instruction encodes 4-bits for the register number | * Instruction encodes 4-bits for the register number | ||
| − | |||
| − | |||
* Special Purpose Registers hard-coded values | * Special Purpose Registers hard-coded values | ||
| − | ** Register 0x8 has value 0x00 | + | ** Register 0x8 has constant value 0x00 |
| − | ** Register 0x9 has value 0x01 | + | ** Register 0x9 has constant value 0x01 |
| − | ** Register 0xF has value 0xFF | + | ** Register 0xF has constant value 0xFF |
| + | * 4, 8, or 13 General Purpose (GP) Registers | ||
| + | ** Registers numbered 0x0-0x7, 0x0A-0xE | ||
| + | |||
| + | == Configuring Number of Registers == | ||
| + | |||
| + | * The number of GP registers can be configured | ||
| + | ** 4 = 4 GP registers plus 0x08, 0x09 0x0F constants | ||
| + | ** 8 = 8 GP registers plus 0x08, 0x09 0x0F constants | ||
| + | ** 16 = 13 GP registers including 0x08, 0x09 0x0F constants | ||
| + | * Register count configured by NUM_REGS value in cpu_001.vhd | ||
| + | |||
| + | <pre> | ||
| + | RegFile : ENTITY work.RegisterFile | ||
| + | GENERIC map ( | ||
| + | NUM_REGS => 4 -- 4, 8. or 16 | ||
| + | ) | ||
| + | </pre> | ||
| + | |||
| + | = Resources = | ||
| + | |||
| + | * 4 registers | ||
| + | ** 19 ALMs | ||
| + | ** 32 registers | ||
| + | * 8 registers | ||
| + | ** 34 ALMs | ||
| + | ** 64 registers | ||
| + | * 16 registers (13 are GP) | ||
| + | ** 42 ALMs | ||
| + | ** 104 registers | ||
Latest revision as of 14:11, 19 April 2022
Register File
- Instruction encodes 4-bits for the register number
- Special Purpose Registers hard-coded values
- Register 0x8 has constant value 0x00
- Register 0x9 has constant value 0x01
- Register 0xF has constant value 0xFF
- 4, 8, or 13 General Purpose (GP) Registers
- Registers numbered 0x0-0x7, 0x0A-0xE
Configuring Number of Registers
- The number of GP registers can be configured
- 4 = 4 GP registers plus 0x08, 0x09 0x0F constants
- 8 = 8 GP registers plus 0x08, 0x09 0x0F constants
- 16 = 13 GP registers including 0x08, 0x09 0x0F constants
- Register count configured by NUM_REGS value in cpu_001.vhd
RegFile : ENTITY work.RegisterFile GENERIC map ( NUM_REGS => 4 -- 4, 8. or 16 )
Resources
- 4 registers
- 19 ALMs
- 32 registers
- 8 registers
- 34 ALMs
- 64 registers
- 16 registers (13 are GP)
- 42 ALMs
- 104 registers
