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agx/lower_parallel_copy: Lower 64-bit copies

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To 32-bit. This way we don't get into bad situations where we need to eg swap
unaligned 64-bit values or something funny like that.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23832>
This commit is contained in:
Alyssa Rosenzweig
2023-03-04 19:52:32 -05:00
committed by Marge Bot
parent bfdaab6512
commit 72e6b683f3
1 changed files with 27 additions and 2 deletions
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29
src/asahi/compiler/agx_lower_parallel_copy.c
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@@ -99,11 +99,34 @@ void
agx_emit_parallel_copies(agx_builder *b, struct agx_copy *copies,
unsigned num_copies)
{
struct copy_ctx _ctx = {.entry_count = num_copies};
/* First, lower away 64-bit copies to smaller chunks, since we don't have
* 64-bit ALU so we always want to split.
*/
struct agx_copy *copies2 = calloc(sizeof(copies[0]), num_copies * 2);
unsigned num_copies2 = 0;
struct copy_ctx *ctx = &_ctx;
for (unsigned i = 0; i < num_copies; ++i) {
struct agx_copy copy = copies[i];
if (copy.src.size == AGX_SIZE_64) {
copy.src.size = AGX_SIZE_32;
copies2[num_copies2++] = copy;
copy.src.value += 2;
copy.dest += 2;
copies2[num_copies2++] = copy;
} else {
copies2[num_copies2++] = copy;
}
}
copies = copies2;
num_copies = num_copies2;
/* Set up the bookkeeping */
struct copy_ctx _ctx = {.entry_count = num_copies};
struct copy_ctx *ctx = &_ctx;
memset(ctx->physreg_dest, 0, sizeof(ctx->physreg_dest));
memset(ctx->physreg_use_count, 0, sizeof(ctx->physreg_use_count));
@@ -262,4 +285,6 @@ agx_emit_parallel_copies(agx_builder *b, struct agx_copy *copies,
entry->done = true;
}
free(copies2);
}