| Rev |
Log message |
Author |
Age |
Path |
| 89 |
CHange registered outputs with non-zero initial values to wires with an internal register.
This works around an issue with Altera (Quartus) synthesis where any port registers are given an initial vale of zero. |
csantifort |
3664d 04h |
/amber/trunk/hw/vlog/amber25/ |
| 88 |
Added the carry in fix added recently to the a23 core to a25 core. |
csantifort |
3664d 04h |
/amber/trunk/hw/vlog/amber25/ |
| 87 |
Added support for "When an Operand2 constant is used with the instructions MOVS, MVNS, ANDS, ORRS, ORNS, EORS, BICS, TEQ or TST, the carry flag is updated to bit[31] of the constant, if the constant is greater than 255 and can be produced by shifting an 8-bit value" to amber23 |
csantifort |
3664d 08h |
/amber/trunk/hw/vlog/amber25/ |
| 86 |
Fixed bug in amber 25 where a read was taken from user mode register in subervisor mode immediately following a ldm to user mode registers |
csantifort |
3677d 04h |
/amber/trunk/hw/vlog/amber25/ |
| 83 |
Fixed bug with carry bit - now only use the carry bit as an input to specific instruments that use it - add with carry and subtract with carry |
csantifort |
3677d 12h |
/amber/trunk/hw/vlog/amber25/ |
| 82 |
Fixed overflag bug, ldmia user regs bug and status_bits_mode set on non-ececuting command bug |
csantifort |
3691d 00h |
/amber/trunk/hw/vlog/amber25/ |
| 63 |
Add support for Xilinx ISim Verilog simulator.
Remove Virtex-6 files. |
csantifort |
4377d 12h |
/amber/trunk/hw/vlog/amber25/ |
| 60 |
Bug fix; removed a combinational loop from the a25_decode logic. |
csantifort |
4882d 03h |
/amber/trunk/hw/vlog/amber25/ |
| 58 |
Use TB.clk_count for the decompiler messages and removed the local counter |
csantifort |
4952d 04h |
/amber/trunk/hw/vlog/amber25/ |
| 54 |
Bug fix for bug reported by Botao Lee. The mode bits in the decode stage did not change immediately
after a mode switch from a teqp instruction, but 1 cycle later. This meant the wrong set of registers
was selected for writing to for 1 clock cycle. |
csantifort |
4969d 03h |
/amber/trunk/hw/vlog/amber25/ |
| 53 |
Cleaned up Amber Verilog, removing unused signals. |
csantifort |
4984d 01h |
/amber/trunk/hw/vlog/amber25/ |
| 39 |
Added a second level of buffering to a25_wishbone_buf to fix a lockup
bug when write acks to not return immediately, and also to improve performance slightly |
csantifort |
5082d 01h |
/amber/trunk/hw/vlog/amber25/ |
| 36 |
Changed boot_mem for the a25 system to be 128 bits wide to match the 128-bit wide wishbone bus |
csantifort |
5084d 00h |
/amber/trunk/hw/vlog/amber25/ |
| 35 |
Amber25 improvements:
Use 128-bit wishbone bus, instead of 32-bit to reduce cache miss fetch times
Use a fast barrel shifter for shifts between 0 and 4 to improve timing
Use a 2 cycle full barrel shifter for complex shifts |
csantifort |
5085d 08h |
/amber/trunk/hw/vlog/amber25/ |
| 30 |
Bug fix - a write access was sometimes dropped when it was in a sequence of writes with variable wb_ack delays |
csantifort |
5101d 08h |
/amber/trunk/hw/vlog/amber25/ |
| 20 |
Added feature to A25 core to directly use a read value from the write back stage
to reduce the stall to 1 cycle when there is a register conflict with the
following instruction. This increases performance by about 3%. |
csantifort |
5170d 07h |
/amber/trunk/hw/vlog/amber25/ |
| 17 |
amber25 core bug fix. The return address for irq interrupts was off by 4 bytes
when the interrupt occurred during a stm instruction with the following instruction
having some register conflicts. Added test irq_stm to catch the bug.
Cleaned up some header descriptions |
csantifort |
5174d 05h |
/amber/trunk/hw/vlog/amber25/ |
| 16 |
Deleted the old version of the 3-state amber core. Its replaced with amber23.
Added the 5-state Amber core. |
csantifort |
5176d 20h |
/amber/trunk/hw/vlog/amber25/ |
