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-rw-r--r--src/svm/svm_fifo.h26
1 files changed, 21 insertions, 5 deletions
diff --git a/src/svm/svm_fifo.h b/src/svm/svm_fifo.h
index 9cb93ff414d..f32ef41da7d 100644
--- a/src/svm/svm_fifo.h
+++ b/src/svm/svm_fifo.h
@@ -127,21 +127,37 @@ format_function_t format_svm_fifo;
always_inline ooo_segment_t *
svm_fifo_newest_ooo_segment (svm_fifo_t * f)
{
- return f->ooo_segments + f->ooos_newest;
+ if (f->ooos_newest == OOO_SEGMENT_INVALID_INDEX)
+ return 0;
+ return pool_elt_at_index (f->ooo_segments, f->ooos_newest);
+}
+
+always_inline u32
+ooo_segment_distance_to_tail (svm_fifo_t * f, u32 a)
+{
+ /* Ambiguous. Assumption is that ooo segments don't touch tail */
+ if (a == f->tail && f->tail == f->head)
+ return f->nitems;
+
+ return ((f->nitems + a - f->tail) % f->nitems);
}
always_inline u32
ooo_segment_offset (svm_fifo_t * f, ooo_segment_t * s)
{
-// return ((f->nitems + s->fifo_position - f->tail) % f->nitems);
- return s->start;
+ return ooo_segment_distance_to_tail (f, s->start);
}
always_inline u32
ooo_segment_end_offset (svm_fifo_t * f, ooo_segment_t * s)
{
-// return ((f->nitems + s->fifo_position + s->length - f->tail) % f->nitems);
- return s->start + s->length;
+ return ooo_segment_distance_to_tail (f, s->start) + s->length;
+}
+
+always_inline u32
+ooo_segment_length (svm_fifo_t * f, ooo_segment_t * s)
+{
+ return s->length;
}
always_inline ooo_segment_t *