nv50/ir: UCMP arguments are float, so make sure modifiers are applied

The first argument to UCMP needs to be compared against 0, but the
latter arguments are treated as float and need to be able to properly
apply neg/abs arguments. Adjust the inferSrcType function accordingly.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: "10.5 10.6" <mesa-stable@lists.freedesktop.org>

src/gallium/drivers/nouveau/codegen/nv50_ir_from_tgsi.cpp

@@ -434,7 +434,6 @@ nv50_ir::DataType Instruction::inferSrcType() const
    case TGSI_OPCODE_USLT:
    case TGSI_OPCODE_USNE:
    case TGSI_OPCODE_USHR:
-   case TGSI_OPCODE_UCMP:
    case TGSI_OPCODE_ATOMUADD:
    case TGSI_OPCODE_ATOMXCHG:
    case TGSI_OPCODE_ATOMCAS:
@@ -2570,6 +2569,8 @@ Converter::handleInstruction(const struct tgsi_full_instruction *insn)
       }
       break;
    case TGSI_OPCODE_UCMP:
+      srcTy = TYPE_U32;
+      /* fallthrough */
    case TGSI_OPCODE_CMP:
       FOR_EACH_DST_ENABLED_CHANNEL(0, c, tgsi) {
          src0 = fetchSrc(0, c);