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libs/vkd3d-shader: Add support for nested control flow.

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This commit is contained in:
Józef Kucia 2017-07-20 13:32:40 +02:00
parent 1e9a38005b
commit f6f70d8c02
1 changed files with 20 additions and 6 deletions
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26
libs/vkd3d-shader/spirv.c
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@ -1307,7 +1307,9 @@ struct vkd3d_dxbc_compiler
enum vkd3d_shader_type shader_type;
unsigned int branch_id;
struct vkd3d_control_flow_info control_flow_info;
unsigned int control_flow_depth;
struct vkd3d_control_flow_info *control_flow_info;
size_t control_flow_info_size;
const struct vkd3d_shader_signature *output_signature;
struct
@ -3007,20 +3009,26 @@ static void vkd3d_dxbc_compiler_emit_return(struct vkd3d_dxbc_compiler *compiler
static void vkd3d_dxbc_compiler_emit_control_flow_instruction(struct vkd3d_dxbc_compiler *compiler,
const struct vkd3d_shader_instruction *instruction)
{
struct vkd3d_control_flow_info *cf_info = &compiler->control_flow_info;
uint32_t merge_block_id, val_id, condition_id, true_label, false_label;
struct vkd3d_spirv_builder *builder = &compiler->spirv_builder;
const struct vkd3d_shader_src_param *src = instruction->src;
struct vkd3d_control_flow_info *cf_info;
cf_info = compiler->control_flow_depth
? &compiler->control_flow_info[compiler->control_flow_depth - 1] : NULL;
switch (instruction->handler_idx)
{
case VKD3DSIH_IF:
if (cf_info->current_block != VKD3D_BLOCK_MAIN)
if (!vkd3d_array_reserve((void **)&compiler->control_flow_info, &compiler->control_flow_info_size,
compiler->control_flow_depth + 1, sizeof(*compiler->control_flow_info)))
{
FIXME("Nested control flow not supported yet.\n");
ERR("Failed to allocate control flow info structure.\n");
return;
}
cf_info = &compiler->control_flow_info[compiler->control_flow_depth++];
val_id = vkd3d_dxbc_compiler_emit_load_reg(compiler,
&src->reg, src->swizzle, VKD3DSP_WRITEMASK_0);
condition_id = vkd3d_dxbc_compiler_emit_int_to_bool(compiler, instruction->flags, 1, val_id);
@ -3044,6 +3052,8 @@ static void vkd3d_dxbc_compiler_emit_control_flow_instruction(struct vkd3d_dxbc_
break;
case VKD3DSIH_ELSE:
assert(compiler->control_flow_depth);
if (cf_info->current_block == VKD3D_BLOCK_IF)
vkd3d_spirv_build_op_branch(builder, cf_info->merge_block_id);
@ -3052,6 +3062,7 @@ static void vkd3d_dxbc_compiler_emit_control_flow_instruction(struct vkd3d_dxbc_
break;
case VKD3DSIH_ENDIF:
assert(compiler->control_flow_depth);
assert(cf_info->current_block != VKD3D_BLOCK_MAIN);
if (cf_info->current_block == VKD3D_BLOCK_IF)
@ -3070,17 +3081,18 @@ static void vkd3d_dxbc_compiler_emit_control_flow_instruction(struct vkd3d_dxbc_
vkd3d_spirv_build_op_label(builder, cf_info->merge_block_id);
memset(cf_info, 0, sizeof(*cf_info));
--compiler->control_flow_depth;
break;
case VKD3DSIH_RET:
vkd3d_dxbc_compiler_emit_return(compiler, instruction);
if (cf_info->current_block == VKD3D_BLOCK_IF)
if (cf_info && cf_info->current_block == VKD3D_BLOCK_IF)
{
vkd3d_spirv_build_op_label(builder, cf_info->else_block_id);
cf_info->current_block = VKD3D_BLOCK_ELSE;
}
else
else if (cf_info)
{
cf_info->current_block = VKD3D_BLOCK_NONE;
}
@ -3376,6 +3388,8 @@ bool vkd3d_dxbc_compiler_generate_spirv(struct vkd3d_dxbc_compiler *compiler,
void vkd3d_dxbc_compiler_destroy(struct vkd3d_dxbc_compiler *compiler)
{
vkd3d_free(compiler->control_flow_info);
vkd3d_free(compiler->output_info);
vkd3d_spirv_builder_free(&compiler->spirv_builder);