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i965/fs: implement d2b

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v2: Use subscript() instead of stride() (Curro)

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Iago Toral Quiroga 2016-01-18 11:23:33 +01:00 • committed by Samuel Iglesias Gonsálvez
parent 80f60a4302
commit e0c45182e3
1 changed files with 13 additions and 0 deletions
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13
src/mesa/drivers/dri/i965/brw_fs_nir.cpp
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@ -1107,6 +1107,19 @@ fs_visitor::nir_emit_alu(const fs_builder &bld, nir_alu_instr *instr)
case nir_op_f2b:
bld.CMP(result, op[0], brw_imm_f(0.0f), BRW_CONDITIONAL_NZ);
break;
case nir_op_d2b: {
/* two-argument instructions can't take 64-bit immediates */
fs_reg zero = vgrf(glsl_type::double_type);
bld.MOV(zero, brw_imm_df(0.0));
/* A SIMD16 execution needs to be split in two instructions, so use
* a vgrf instead of the flag register as dst so instruction splitting
* works
*/
fs_reg tmp = vgrf(glsl_type::double_type);
bld.CMP(tmp, op[0], zero, BRW_CONDITIONAL_NZ);
bld.MOV(result, subscript(tmp, BRW_REGISTER_TYPE_UD, 0));
break;
}
case nir_op_i2b:
bld.CMP(result, op[0], brw_imm_d(0), BRW_CONDITIONAL_NZ);
break;