mfocrf (Move from One Condition Register Field) instruction
Purpose
Copies the contents of one Condition Register field into a general-purpose register.
Syntax
| Bits | Value |
|---|---|
| 0 - 5 | 31 |
| 6 - 10 | RT |
| 11 | 1 |
| 12 - 19 | FXM |
| 20 | /// |
| 21 - 30 | 19 |
| 31 | /// |
Description
The mfocrf instruction copies the contents of one Condition Register field specified by the field mask FXM into the target general-purpose register (GPR) RT.
Field mask FXM is defined as follows:
| Bit | Description |
|---|---|
| 12 | CR 00-03 is copied into GPR RS 00-03. |
| 13 | CR 04-07 is copied into GPR RS 04-07. |
| 14 | CR 08-11 is copied into GPR RS 08-11. |
| 15 | CR 12-15 is copied into GPR RS 12-15. |
| 16 | CR 16-19 is copied into GPR RS 16-19. |
| 17 | CR 20-23 is copied into GPR RS 20-23. |
| 18 | CR 24-27 is copied into GPR RS 24-27. |
| 19 | CR 28-31 is copied into GPR RS 28-31. |
The mfocrf instruction has one syntax form and does not affect the Fixed-Point Exception Register.
Parameters
| Item | Description |
|---|---|
| RT | Specifies target general-purpose register where result of operation is stored. |
| FXM | Specifies field mask. Only one bit may be specified. |
Examples
The following code copies the Condition Register field 3 into GPR 6:
# Assume the Condition Register contains 0x4055 F605.
# Field 3 (0x10 = b'0001 0000')
mfocrf 6, 0x10
# GPR 6 now contains 0x0005 0000.