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agx: Use unconditional else instruction

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Rather than duplicating the condition. This matches the blob, so is presumably
the most energy-efficient way of expressing the logic.

No shader-db changes.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24635>
This commit is contained in:
Alyssa Rosenzweig
2023-07-29 20:58:53 -04:00
committed by Marge Bot
parent 41b7891673
commit 782055106f
1 changed files with 4 additions and 1 deletions
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5
src/asahi/compiler/agx_compile.c
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@@ -1878,8 +1878,11 @@ emit_if(agx_context *ctx, nir_if *nif)
agx_block *else_block = emit_cf_list(ctx, &nif->else_list);
agx_block *end_else = ctx->current_block;
/* Insert an else instruction at the beginning of the else block. We use
* "else_fcmp 0.0, 0.0, eq" as unconditional else, matching the blob.
*/
_b.cursor = agx_before_block(else_block);
agx_else_icmp(&_b, cond, agx_zero(), 1, AGX_ICOND_UEQ, false);
agx_else_fcmp(&_b, agx_zero(), agx_zero(), 1, AGX_FCOND_EQ, false);
ctx->after_block = agx_create_block(ctx);