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asap7/aes-block: synthesize with slang, fixed die so it smoke-tests BLOCKS, not mpl #4681

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asap7/aes-block: synthesize with slang, fixed die so it smoke-tests BLOCKS, not mpl #4681

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4f203d8
asap7/aes-block: synthesize with slang, at absolute sizes
oharboe Oct 15, 2026
2285436
asap7/aes-block: name aes_sbox's size, an unnamed block gets none
oharboe Oct 15, 2026
aa11854
asap7/aes-block: state the design's purpose, a smoke test of BLOCKS
oharboe Oct 17, 2026
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16 changes: 13 additions & 3 deletions flow/designs/asap7/aes-block/block.mk
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Original file line number Diff line number Diff line change
Expand Up @@ -3,11 +3,21 @@ export PLATFORM = asap7
export VERILOG_FILES = $(sort $(wildcard ./designs/src/aes/*.v))
export SDC_FILE = ./designs/$(PLATFORM)/aes/constraint.sdc

export SYNTH_HDL_FRONTEND = slang
# ignore unsynthesizable timing controls (the sources' #1 delays)
export SYNTH_SLANG_ARGS += --ignore-timing

export ABC_AREA = 1

export CORE_UTILIZATION = 40
export CORE_ASPECT_RATIO = 1
export CORE_MARGIN = 2
# Fixed sizes so the parent's macros keep their size: see config.mk.
ifeq ($(DESIGN_NAME),aes_rcon)
export DIE_AREA = 0 0 9.144 9.144
export CORE_AREA = 2.052 2.160 7.128 7.020
else ifeq ($(DESIGN_NAME),aes_sbox)
export DIE_AREA = 0 0 15.866 15.866
export CORE_AREA = 2.052 2.160 13.824 13.770
endif
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export PLACE_DENSITY = 0.70

export MAX_ROUTING_LAYER ?= M5
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14 changes: 11 additions & 3 deletions flow/designs/asap7/aes-block/config.mk
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Expand Up @@ -6,11 +6,19 @@ export DESIGN_NICKNAME = aes-block
export VERILOG_FILES = $(sort $(wildcard $(DESIGN_HOME)/src/aes/*.v))
export SDC_FILE = $(DESIGN_HOME)/$(PLATFORM)/$(DESIGN_NICKNAME)/constraint.sdc

export SYNTH_HDL_FRONTEND = slang
# ignore unsynthesizable timing controls (the sources' #1 delays)
export SYNTH_SLANG_ARGS += --ignore-timing

export ABC_AREA = 1

export CORE_UTILIZATION = 47
export CORE_ASPECT_RATIO = 1
export CORE_MARGIN = 2
# aes-block is the smoke test of BLOCKS: hierarchical synthesis, two
# hardened blocks, and their macros placed in the parent. It is not a
# test of macro placement or of utilization. The die is fixed, with
# headroom, so that changes in synthesis or OpenROAD do not move this
# design onto the edge of what macro placement can pack.
export DIE_AREA = 0 0 113.801 113.801
export CORE_AREA = 2.052 2.160 111.780 111.780

export BLOCKS ?= aes_rcon aes_sbox
export SYNTH_HIERARCHICAL = 1
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