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mesa/st: add support for emitting fine derivative opcodes 

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Ilia Mirkin 2014-08-14 00:09:18 -04:00
parent 8ee74ce50f
commit 88b0c6403f
2 changed files with 10 additions and 2 deletions
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3
src/mesa/state_tracker/st_extensions.c
View File

@ -458,7 +458,8 @@ void st_init_extensions(struct pipe_screen *screen,
{ o(ARB_texture_multisample), PIPE_CAP_TEXTURE_MULTISAMPLE },
{ o(ARB_texture_query_lod), PIPE_CAP_TEXTURE_QUERY_LOD },
{ o(ARB_sample_shading), PIPE_CAP_SAMPLE_SHADING },
{ o(ARB_draw_indirect), PIPE_CAP_DRAW_INDIRECT }
{ o(ARB_draw_indirect), PIPE_CAP_DRAW_INDIRECT },
{ o(ARB_derivative_control), PIPE_CAP_TGSI_FS_FINE_DERIVATIVE },
};
/* Required: render target and sampler support */

9
src/mesa/state_tracker/st_glsl_to_tgsi.cpp
View File

@ -1462,9 +1462,15 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
break;
case ir_unop_dFdx:
case ir_unop_dFdx_coarse:
emit(ir, TGSI_OPCODE_DDX, result_dst, op[0]);
break;
case ir_unop_dFdx_fine:
emit(ir, TGSI_OPCODE_DDX_FINE, result_dst, op[0]);
break;
case ir_unop_dFdy:
case ir_unop_dFdy_coarse:
case ir_unop_dFdy_fine:
{
/* The X component contains 1 or -1 depending on whether the framebuffer
* is a FBO or the window system buffer, respectively.
@ -1485,7 +1491,8 @@ glsl_to_tgsi_visitor::visit(ir_expression *ir)
st_src_reg temp = get_temp(glsl_type::vec4_type);
emit(ir, TGSI_OPCODE_MUL, st_dst_reg(temp), transform_y, op[0]);
emit(ir, TGSI_OPCODE_DDY, result_dst, temp);
emit(ir, ir->operation == ir_unop_dFdy_fine ?
TGSI_OPCODE_DDY_FINE : TGSI_OPCODE_DDY, result_dst, temp);
break;
}