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authorDimitar Dimitrov <dimitar@dinux.eu>2022-11-11 20:14:13 +0200
committerDimitar Dimitrov <dimitar@dinux.eu>2022-11-12 15:10:07 +0200
commit7bee555bb712b74749b749d80566f9c0d2094312 (patch)
tree3a88471f78ae789677ea9146ba39f886601d58d0 /sim/pru
parent7149607f6ae572fa198116b0d0fb69a3e0fde458 (diff)
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sim: pru: Fix behaviour when loop count is zero
If the counter for LOOP instruction is provided by a register with value zero, then the instruction must cause a PC jump directly to the loop end. But in that particular case simulator must not initialize its internal loop variables, because loop body will not be executed. Instead, simulator must obtain the loop's end address directly from the LOOP instruction. Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
Diffstat (limited to 'sim/pru')
-rw-r--r--sim/pru/pru.isa4
1 files changed, 2 insertions, 2 deletions
diff --git a/sim/pru/pru.isa b/sim/pru/pru.isa
index b7d8b4a..be8cdfd 100644
--- a/sim/pru/pru.isa
+++ b/sim/pru/pru.isa
@@ -222,7 +222,7 @@ INSTRUCTION (loop,
OP2 = (IO ? IMM8 + 1 : RS2_w0);
if (OP2 == 0)
{
- PC = LOOPEND;
+ PC = PC + LOOP_JMPOFFS;
}
else
{
@@ -237,7 +237,7 @@ INSTRUCTION (iloop,
OP2 = (IO ? IMM8 + 1 : RS2_w0);
if (OP2 == 0)
{
- PC = LOOPEND;
+ PC = PC + LOOP_JMPOFFS;
}
else
{