wine/vkd3d
0
0
Fork 0
mirror of https://gitlab.winehq.org/wine/vkd3d.git synced 2025-09-12 18:50:22 -07:00
Code Issues Packages Projects Releases Wiki Activity

vkd3d-shader/hlsl: Implement normalization of binary expressions.

Browse Source 
We normalize binary expressions by attempting to group constants
together, in order to facilitate further simplification of the
expressions.

For any binary operator OP, non-constants x, y, and constants a, b, we
apply the following rewrite rules:

  a OP x -> x OP a, if OP is commutative.

  (x OP a) OP b -> x OP (a OP b), if OP is associative.

  (x OP a) OP y -> (x OP y) OP a, if OP is associative and commutative.

  x OP (y OP a) -> (x OP y) OP a, if OP is associative.

Note that we consider floating point operations to be
non-associative.
This commit is contained in:
Shaun Ren
2024-12-06 17:07:13 -05:00
committed by Henri Verbeet
parent 65b67e84a8
commit 2c9cf7c78b
Notes: Henri Verbeet 2024-12-11 15:37:25 +01:00 
Approved-by: Elizabeth Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/1307
4 changed files with 161 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
libs/vkd3d-shader/hlsl_codegen.c
View File

@@ -6569,6 +6569,7 @@ void hlsl_run_const_passes(struct hlsl_ctx *ctx, struct hlsl_block *body)
{
progress = hlsl_transform_ir(ctx, hlsl_fold_constant_exprs, body, NULL);
progress |= hlsl_transform_ir(ctx, hlsl_fold_constant_identities, body, NULL);
progress |= hlsl_transform_ir(ctx, hlsl_normalize_binary_exprs, body, NULL);
progress |= hlsl_transform_ir(ctx, hlsl_fold_constant_swizzles, body, NULL);
progress |= hlsl_copy_propagation_execute(ctx, body);
progress |= hlsl_transform_ir(ctx, fold_swizzle_chains, body, NULL);