Difference between revisions of "IOP16 Register File"
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* The number of GP registers can be configured | * The number of GP registers can be configured | ||
| − | ** 4 GP registers plus 0x08, 0x09 0x0F constants | + | ** 4 = 4 GP registers plus 0x08, 0x09 0x0F constants |
| − | ** 8 GP registers plus 0x08, 0x09 0x0F constants | + | ** 8 = 8 GP registers plus 0x08, 0x09 0x0F constants |
| − | ** 16 GP registers including 0x08, 0x09 0x0F constants | + | ** 16 = 13 GP registers including 0x08, 0x09 0x0F constants |
* Register count configured by NUM_REGS value in cpu_001.vhd | * Register count configured by NUM_REGS value in cpu_001.vhd | ||
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
