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[vulkan] Ensure staging buffer packets align to 16 bytes 

Unaligned packets make it rather unsafe to use vector instructions to
transfer data to them (which optimizing compilers like to do these
days).
This commit is contained in:
Bill Currie 2023-06-28 00:27:51 +09:00
parent 2bf52e748a
commit 03cfd2530b
1 changed files with 8 additions and 1 deletions
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9
libs/video/renderer/vulkan/staging.c
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@ -134,6 +134,12 @@ QFV_FlushStagingBuffer (qfv_stagebuf_t *stage, size_t offset, size_t size)
dfunc->vkFlushMappedMemoryRanges (device->dev, 1, &range);
}
static size_t
align (size_t x, size_t a)
{
return (x + a - 1) & ~(a - 1);
}
static void
release_space (qfv_stagebuf_t *stage, size_t offset, size_t length)
{
@ -146,7 +152,7 @@ release_space (qfv_stagebuf_t *stage, size_t offset, size_t length)
stage->space_end = 0;
stage->end = stage->size;
}
stage->space_end += length;
stage->space_end += align (length, 16);
}
static void *
@ -235,6 +241,7 @@ QFV_PacketAcquire (qfv_stagebuf_t *stage)
}
packet = RB_ACQUIRE (stage->packets, 1);
stage->space_start = align (stage->space_start, 16);
packet->offset = stage->space_start;
packet->length = 0;