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i965/nir/vec4: Implement floating-point fused multiply-add 

Adds NIR ALU operation:
   * nir_op_ffma

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
This commit is contained in:
Antia Puentes 2015-06-17 09:51:10 +02:00 committed by Jason Ekstrand
parent d12e165dbb
commit b64bd1fdc3
1 changed files with 9 additions and 0 deletions
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9
src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
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@ -1193,6 +1193,15 @@ vec4_visitor::nir_emit_alu(nir_alu_instr *instr)
emit(SHR(dst, op[0], op[1]));
break;
case nir_op_ffma:
op[0] = fix_3src_operand(op[0]);
op[1] = fix_3src_operand(op[1]);
op[2] = fix_3src_operand(op[2]);
inst = emit(MAD(dst, op[2], op[1], op[0]));
inst->saturate = instr->dest.saturate;
break;
default:
unreachable("Unimplemented ALU operation");
}