trx/scheduler: Use integer math for TOA (Timing of Arrival)

There's no need to express TOA as a float:
* We receive it as signed 16bit integer in units 1/256 symbol periods
* We pass it to L1SAP as signed integer in 1/4 symbol periods

So turn it into an int16_t with 1/256 symbol period accuracy throughout
the code to avoid both float arithmetic as well as loosing any precision.

Change-Id: Idce4178e0b1f7e940ebc22b3e2f340fcd544d4ec

1 files changed, 5 insertions, 5 deletions

diff --git a/src/osmo-bts-virtual/scheduler_virtbts.c b/src/osmo-bts-virtual/scheduler_virtbts.c
index 2283be1f..5782c0a5 100644
--- a/src/osmo-bts-virtual/scheduler_virtbts.c
+++ b/src/osmo-bts-virtual/scheduler_virtbts.c
@@ -480,7 +480,7 @@ send_burst:
 
 int rx_rach_fn(struct l1sched_trx *l1t, uint8_t tn, uint32_t fn,
 	enum trx_chan_type chan, uint8_t bid, sbit_t *bits, uint16_t nbits,
-	int8_t rssi, float toa)
+	int8_t rssi, int16_t toa256)
 {
 	return 0;
 }
@@ -488,28 +488,28 @@ int rx_rach_fn(struct l1sched_trx *l1t, uint8_t tn, uint32_t fn,
 /*! \brief a single burst was received by the PHY, process it */
 int rx_data_fn(struct l1sched_trx *l1t, uint8_t tn, uint32_t fn,
 	enum trx_chan_type chan, uint8_t bid, sbit_t *bits, uint16_t nbits,
-	int8_t rssi, float toa)
+	int8_t rssi, int16_t toa256)
 {
 	return 0;
 }
 
 int rx_pdtch_fn(struct l1sched_trx *l1t, uint8_t tn, uint32_t fn,
 	enum trx_chan_type chan, uint8_t bid, sbit_t *bits, uint16_t nbits,
-	int8_t rssi, float toa)
+	int8_t rssi, int16_t toa256)
 {
 	return 0;
 }
 
 int rx_tchf_fn(struct l1sched_trx *l1t, uint8_t tn, uint32_t fn,
 	enum trx_chan_type chan, uint8_t bid, sbit_t *bits, uint16_t nbits,
-	int8_t rssi, float toa)
+	int8_t rssi, int16_t toa256)
 {
 	return 0;
 }
 
 int rx_tchh_fn(struct l1sched_trx *l1t, uint8_t tn, uint32_t fn,
 	enum trx_chan_type chan, uint8_t bid, sbit_t *bits, uint16_t nbits,
-	int8_t rssi, float toa)
+	int8_t rssi, int16_t toa256)
 {
 	return 0;
 }