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[hw] Pop a scalar FP result from FPU0 only #125

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[hw] Pop a scalar FP result from FPU0 only #125

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6 changes: 5 additions & 1 deletion hw/ip/spatz/src/spatz_vfu.sv
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Original file line number Diff line number Diff line change
Expand Up @@ -1575,6 +1575,10 @@ assign vfcmp_result_accepted = (spatz_req.op == VFCMP) && &(result_valid | ~pend
logic int_fpu_in_valid;
assign int_fpu_in_valid = spatz_req_valid && operands_ready && (!spatz_req.op_arith.is_scalar || fpu == 0) && is_fpu_insn;

// Only the FPU0 retires scalar instructions
logic int_fpu_out_ready;
assign int_fpu_out_ready = result_ready && (!result_tag.wb || fpu == 0);

// Generate an FPU pipeline
elen_t fpu_operand1_q, fpu_operand2_q, fpu_operand3_q;
operation_e fpu_op_q;
Expand Down Expand Up @@ -1627,7 +1631,7 @@ assign vfcmp_result_accepted = (spatz_req.op == VFCMP) && &(result_valid | ~pend
.rnd_mode_i (rm_q ),
.result_o (fpu_result[fpu*ELEN +: ELEN] ),
.out_valid_o (int_fpu_result_valid ),
.out_ready_i (result_ready ),
.out_ready_i (int_fpu_out_ready ),
.status_o (fpu_status_d[fpu] ),
.tag_o (tag )
);
Expand Down