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vkd3d-shader/hlsl: Implement the firstbithigh() intrinsic.

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This commit is contained in:
Petrichor Park
2024-07-29 13:12:09 -05:00
committed by Henri Verbeet
parent e49beca0d5
commit e6d840170d
Notes: Henri Verbeet 2025-09-22 11:46:20 +02:00 
Approved-by: Francisco Casas (@fcasas)
Approved-by: Elizabeth Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/965
7 changed files with 192 additions and 7 deletions
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73
libs/vkd3d-shader/hlsl_codegen.c
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@@ -11057,6 +11057,15 @@ static bool sm4_generate_vsir_instr_expr(struct hlsl_ctx *ctx,
generate_vsir_instr_expr_single_instr_op(ctx, program, expr, VSIR_OP_ROUND_PI, 0, 0, true);
return true;
case HLSL_OP1_CLZ:
VKD3D_ASSERT(hlsl_type_is_integer(dst_type));
VKD3D_ASSERT(hlsl_version_ge(ctx, 5, 0));
if (hlsl_type_is_signed_integer(src_type))
generate_vsir_instr_expr_single_instr_op(ctx, program, expr, VSIR_OP_FIRSTBIT_SHI, 0, 0, true);
else
generate_vsir_instr_expr_single_instr_op(ctx, program, expr, VSIR_OP_FIRSTBIT_HI, 0, 0, true);
return true;
case HLSL_OP1_COS:
VKD3D_ASSERT(type_is_float(dst_type));
sm4_generate_vsir_expr_with_two_destinations(ctx, program, VSIR_OP_SINCOS, expr, 1);
@@ -14290,6 +14299,69 @@ static bool lower_f32tof16(struct hlsl_ctx *ctx, struct hlsl_ir_node *node, stru
return true;
}
static bool lower_find_msb(struct hlsl_ctx *ctx, struct hlsl_ir_node *node, struct hlsl_block *block)
{
struct hlsl_ir_function_decl *func;
struct hlsl_ir_node *call, *rhs;
struct hlsl_ir_expr *expr;
struct hlsl_ir_var *lhs;
char *body;
/* For positive numbers, find_msb() returns the bit number of the most
* significant 1-bit. For negative numbers, it returns the bit number of
* the most significant 0-bit. Bit numbers count from the least
* significant bit. */
static const char template[] =
"typedef %s intX;\n"
"uint%u find_msb(intX v)\n"
"{\n"
" intX c, mask;\n"
" v = v < 0 ? ~v : v;\n"
" mask = v & 0xffff0000;\n"
" v = mask ? mask : v;\n"
" c = mask ? 16 : v ? 0 : -1;\n"
" mask = v & 0xff00ff00;\n"
" v = mask ? mask : v;\n"
" c = mask ? c + 8 : c;\n"
" mask = v & 0xf0f0f0f0;\n"
" v = mask ? mask : v;\n"
" c = mask ? c + 4 : c;\n"
" mask = v & 0xcccccccc;\n"
" v = mask ? mask : v;\n"
" c = mask ? c + 2 : c;\n"
" mask = v & 0xaaaaaaaa;\n"
" v = mask ? mask : v;\n"
" c = mask ? c + 1 : c;\n"
" return c;\n"
"}\n";
if (node->type != HLSL_IR_EXPR)
return false;
expr = hlsl_ir_expr(node);
if (expr->op != HLSL_OP1_FIND_MSB)
return false;
rhs = expr->operands[0].node;
if (!(body = hlsl_sprintf_alloc(ctx, template, rhs->data_type->name, hlsl_type_component_count(rhs->data_type))))
return false;
func = hlsl_compile_internal_function(ctx, "find_msb", body);
vkd3d_free(body);
if (!func)
return false;
lhs = func->parameters.vars[0];
hlsl_block_add_simple_store(ctx, block, lhs, rhs);
if (!(call = hlsl_new_call(ctx, func, &node->loc)))
return false;
hlsl_block_add_instr(block, call);
hlsl_block_add_simple_load(ctx, block, func->return_var, &node->loc);
return true;
}
static bool lower_isinf(struct hlsl_ctx *ctx, struct hlsl_ir_node *node, struct hlsl_block *block)
{
struct hlsl_ir_function_decl *func;
@@ -14409,6 +14481,7 @@ static void process_entry_function(struct hlsl_ctx *ctx, struct list *semantic_v
lower_ir(ctx, lower_countbits, body);
lower_ir(ctx, lower_f16tof32, body);
lower_ir(ctx, lower_f32tof16, body);
lower_ir(ctx, lower_find_msb, body);
}
lower_ir(ctx, lower_isinf, body);