nvc0/ir: fix up an assertion in emitUADD()

It's illegal to have neg modifiers on both sources for OP_ADD,
and it's illegal to have OP_SUB with just src0 neg.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

diff --git a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp
index 1c3e519..8c9b867 100644 (file)
--- a/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp
+++ b/src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nvc0.cpp
@@ -698,16 +698,15 @@ CodeEmitterNVC0::emitUADD(const Instruction *i)
    uint32_t addOp = 0;
 
    assert(!i->src(0).mod.abs() && !i->src(1).mod.abs());
-   assert(!i->src(0).mod.neg() || !i->src(1).mod.neg());
 
    if (i->src(0).mod.neg())
       addOp |= 0x200;
    if (i->src(1).mod.neg())
       addOp |= 0x100;
-   if (i->op == OP_SUB) {
+   if (i->op == OP_SUB)
       addOp ^= 0x100;
-      assert(addOp != 0x300); // would be add-plus-one
-   }
+
+   assert(addOp != 0x300); // would be add-plus-one
 
    if (i->encSize == 8) {
       if (isLIMM(i->src(1), TYPE_U32)) {