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mistral: Compensate for EF_SEL mirroring in validity check

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Signed-off-by: gatecat <gatecat@ds0.me>
This commit is contained in:
gatecat 2021-05-14 23:13:30 +01:00
parent 87ebada258
commit e1aaf715c6
1 changed files with 2 additions and 2 deletions
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mistral/lab.cc
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@ -384,8 +384,8 @@ bool Arch::is_alm_legal(uint32_t lab, uint8_t alm) const
// signals and SLOAD=1 (*PKREF*)
bool route_thru_lut_avail = !luts[i] && !carry_mode && (total_lut_inputs < 8) && (used_lut_bits < 64);
// E/F is available if this LUT is using 3 or fewer inputs - this is conservative and sharing can probably
// improve this situation
bool ef_available = (!luts[i] || (luts[i]->combInfo.used_lut_input_count <= 2));
// improve this situation. (1 - i) because the F input to EF_SEL is mirrored.
bool ef_available = (!luts[1 - i] || (luts[1 - i]->combInfo.used_lut_input_count <= 2));
// Control set checking
bool found_ff = false;