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vkd3d-shader: Lower DIV to RCP + MUL for SM1.

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Signed-off-by: Zebediah Figura <zfigura@codeweavers.com>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Matteo Bruni <mbruni@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Zebediah Figura 2021-05-21 00:32:24 -05:00 committed by Alexandre Julliard
parent 6493953516
commit 100c65c967
1 changed files with 24 additions and 0 deletions
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24
libs/vkd3d-shader/hlsl_codegen.c
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@ -388,6 +388,27 @@ static bool fold_constants(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, voi
return true;
}
/* Lower DIV to RCP + MUL. */
static bool lower_division(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context)
{
struct hlsl_ir_expr *expr;
struct hlsl_ir_node *rcp;
if (instr->type != HLSL_IR_EXPR)
return false;
expr = hlsl_ir_expr(instr);
if (expr->op != HLSL_IR_BINOP_DIV)
return false;
if (!(rcp = hlsl_new_unary_expr(ctx, HLSL_IR_UNOP_RCP, expr->operands[1].node, instr->loc)))
return false;
list_add_before(&expr->node.entry, &rcp->entry);
expr->op = HLSL_IR_BINOP_MUL;
hlsl_src_remove(&expr->operands[1]);
hlsl_src_from_node(&expr->operands[1], rcp);
return true;
}
static bool dce(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, void *context)
{
switch (instr->type)
@ -1954,6 +1975,9 @@ int hlsl_emit_dxbc(struct hlsl_ctx *ctx, struct hlsl_ir_function_decl *entry_fun
while (transform_ir(ctx, split_struct_copies, entry_func->body, NULL));
while (transform_ir(ctx, fold_constants, entry_func->body, NULL));
if (ctx->profile->major_version < 4)
transform_ir(ctx, lower_division, entry_func->body, NULL);
do
compute_liveness(ctx, entry_func);
while (transform_ir(ctx, dce, entry_func->body, NULL));