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fhdl/memory: Simplify Read Logic.

This commit is contained in:
Florent Kermarrec 2021-10-28 14:34:52 +02:00
parent 576bb67332
commit 08a9392c54
1 changed files with 6 additions and 7 deletions
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13
litex/gen/fhdl/memory.py
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@ -118,15 +118,14 @@ def memory_emit_verilog(memory, ns, add_data_file):
if port.mode in [WRITE_FIRST]: if port.mode in [WRITE_FIRST]:
rd = f"\t{gn(adr_regs[n])} <= {gn(port.adr)};\n" rd = f"\t{gn(adr_regs[n])} <= {gn(port.adr)};\n"
# In Write-First/No Change mode: # In Read-First/No Change mode:
if port.mode in [READ_FIRST, NO_CHANGE]: if port.mode in [READ_FIRST, NO_CHANGE]:
bassign = f"{gn(data_regs[n])} <= {gn(memory)} [{gn(port.adr)}];\n" rd = ""
# Always Read in Read-First mode.
if port.mode == READ_FIRST:
rd = f"\t{bassign}"
# Only Read in No-Change mode when no Write. # Only Read in No-Change mode when no Write.
elif port.mode == NO_CHANGE: if port.mode == NO_CHANGE:
rd = f"\tif (!{gn(port.we)})\n\t\t{bassign}" rd += f"\tif (!{gn(port.we)})\n\t"
# Read-First/No-Change Read logic.
rd += f"\t{gn(data_regs[n])} <= {gn(memory)}[{gn(port.adr)}];\n"
# Add Read-Enable Logic. # Add Read-Enable Logic.
if port.re is None: if port.re is None: