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i965/vec4/nir: implement double comparisons

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v2:
- Added newline before if() (Matt)

Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Iago Toral Quiroga 2015-08-13 15:34:24 -07:00 • committed by Samuel Iglesias Gonsálvez
parent 8a3ba03339
commit 8cdbbbd2cf
1 changed files with 19 additions and 3 deletions
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22
src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
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@ -1394,10 +1394,26 @@ vec4_visitor::nir_emit_alu(nir_alu_instr *instr)
case nir_op_flt:
case nir_op_fge:
case nir_op_feq:
case nir_op_fne:
emit(CMP(dst, op[0], op[1],
brw_conditional_for_nir_comparison(instr->op)));
case nir_op_fne: {
enum brw_conditional_mod conditional_mod =
brw_conditional_for_nir_comparison(instr->op);
if (nir_src_bit_size(instr->src[0].src) < 64) {
emit(CMP(dst, op[0], op[1], conditional_mod));
} else {
/* Produce a 32-bit boolean result from the DF comparison by selecting
* only the low 32-bit in each DF produced. Do this in a temporary
* so we can then move from there to the result using align16 again
* to honor the original writemask.
*/
dst_reg temp = dst_reg(this, glsl_type::dvec4_type);
emit(CMP(temp, op[0], op[1], conditional_mod));
dst_reg result = dst_reg(this, glsl_type::bvec4_type);
emit(VEC4_OPCODE_PICK_LOW_32BIT, result, src_reg(temp));
emit(MOV(dst, src_reg(result)));
}
break;
}
case nir_op_ball_iequal2:
case nir_op_ball_iequal3: