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vkd3d-shader/hlsl: Use conditional moves for arithmetic operators instead of branching.

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Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
This commit is contained in:
Nikolay Sivov
2023-09-09 20:08:52 +02:00
committed by Alexandre Julliard
parent 34b1c0fe5d
commit 6d1ba83856
Notes: Alexandre Julliard 2023-09-22 22:46:41 +02:00 
Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Zebediah Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/336
5 changed files with 69 additions and 26 deletions
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35
libs/vkd3d-shader/hlsl_codegen.c
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@@ -2523,36 +2523,19 @@ static bool lower_casts_to_bool(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr
struct hlsl_ir_node *hlsl_add_conditional(struct hlsl_ctx *ctx, struct hlsl_block *instrs,
struct hlsl_ir_node *condition, struct hlsl_ir_node *if_true, struct hlsl_ir_node *if_false)
{
struct hlsl_block then_block, else_block;
struct hlsl_ir_node *iff, *store;
struct hlsl_ir_load *load;
struct hlsl_ir_var *var;
struct hlsl_ir_node *operands[HLSL_MAX_OPERANDS];
struct hlsl_ir_node *cond;
assert(hlsl_types_are_equal(if_true->data_type, if_false->data_type));
if (!(var = hlsl_new_synthetic_var(ctx, "conditional", if_true->data_type, &condition->loc)))
return NULL;
operands[0] = condition;
operands[1] = if_true;
operands[2] = if_false;
if (!(cond = hlsl_new_expr(ctx, HLSL_OP3_TERNARY, operands, if_true->data_type, &condition->loc)))
return false;
hlsl_block_add_instr(instrs, cond);
hlsl_block_init(&then_block);
hlsl_block_init(&else_block);
if (!(store = hlsl_new_simple_store(ctx, var, if_true)))
return NULL;
hlsl_block_add_instr(&then_block, store);
if (!(store = hlsl_new_simple_store(ctx, var, if_false)))
return NULL;
hlsl_block_add_instr(&else_block, store);
if (!(iff = hlsl_new_if(ctx, condition, &then_block, &else_block, &condition->loc)))
return NULL;
hlsl_block_add_instr(instrs, iff);
if (!(load = hlsl_new_var_load(ctx, var, &condition->loc)))
return NULL;
hlsl_block_add_instr(instrs, &load->node);
return &load->node;
return cond;
}
static bool lower_int_division(struct hlsl_ctx *ctx, struct hlsl_ir_node *instr, struct hlsl_block *block)