From e143811dda9b5cf547afc021f4b9556b5f808ee7 Mon Sep 17 00:00:00 2001
From: Alban Gruin <alban.gruin@irit.fr>
Date: Thu, 8 Jul 2021 11:25:48 +0200
Subject: [PATCH] IRO: always allow an ALU instruction to be executed
Signed-off-by: Alban Gruin <alban.gruin@irit.fr>
---
src/issue_read_operands.sv | 9 ++-------
1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/src/issue_read_operands.sv b/src/issue_read_operands.sv
index f5da02d0..e35165dc 100644
--- a/src/issue_read_operands.sv
+++ b/src/issue_read_operands.sv
@@ -128,9 +128,9 @@ module issue_read_operands import ariane_pkg::*; #(
// this obviously depends on the functional unit we need
always_comb begin : unit_busy
unique case (issue_instr_i.fu)
- NONE:
+ NONE, ALU, CTRL_FLOW:
fu_busy = 1'b0;
- ALU, CTRL_FLOW, CSR, MULT:
+ CSR, MULT:
fu_busy = ~flu_ready_i;
FPU, FPU_VEC:
fu_busy = ~fpu_ready_i;
@@ -336,11 +336,6 @@ module issue_read_operands import ariane_pkg::*; #(
issue_ack_o = 1'b1;
end
end
- // after a multiplication was issued we can only issue another multiplication
- // otherwise we will get contentions on the fixed latency bus
- if (mult_valid_q && issue_instr_i.fu != MULT) begin
- issue_ack_o = 1'b0;
- end
end
// ----------------------
--
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