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py/mkrules.mk: workaround fused multiply-add inaccuracy #5995

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py/mkrules.mk: workaround fused multiply-add inaccuracy #5995

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3 changes: 3 additions & 0 deletions py/mkrules.mk
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,9 @@ OBJ_EXTRA_ORDER_DEPS += $(HEADER_BUILD)/compressed.data.h
CFLAGS += -DMICROPY_ROM_TEXT_COMPRESSION=1
endif

# see 'fused multiply-add' problem
CFLAGS += -ffp-contract=off

# QSTR generation uses the same CFLAGS, with these modifications.
# Note: := to force evalulation immediately.
QSTR_GEN_CFLAGS := $(CFLAGS)
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