nv50/ir: Add sat modifier for mul

Signed-off-by: Roy Spliet <rspliet@eclipso.eu>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

src/gallium/drivers/nouveau/codegen/nv50_ir_emit_nv50.cpp

@@ -1059,16 +1059,22 @@ CodeEmitterNV50::emitFMUL(const Instruction *i)
       emitForm_IMM(i);
       if (neg)
          code[0] |= 0x8000;
+      if (i->saturate)
+         code[0] |= 1 << 8;
    } else
    if (i->encSize == 8) {
       code[1] = i->rnd == ROUND_Z ? 0x0000c000 : 0;
       if (neg)
          code[1] |= 0x08000000;
+      if (i->saturate)
+         code[1] |= 1 << 20;
       emitForm_MAD(i);
    } else {
       emitForm_MUL(i);
       if (neg)
          code[0] |= 0x8000;
+      if (i->saturate)
+         code[0] |= 1 << 8;
    }
 }
 

src/gallium/drivers/nouveau/codegen/nv50_ir_target_nv50.cpp

@@ -84,7 +84,7 @@ static const struct opProperties _initProps[] =
    //           neg  abs  not  sat  c[]  s[], a[], imm
    { OP_ADD,    0x3, 0x0, 0x0, 0x8, 0x2, 0x1, 0x1, 0x2 },
    { OP_SUB,    0x3, 0x0, 0x0, 0x0, 0x2, 0x1, 0x1, 0x2 },
-   { OP_MUL,    0x3, 0x0, 0x0, 0x0, 0x2, 0x1, 0x1, 0x2 },
+   { OP_MUL,    0x3, 0x0, 0x0, 0x8, 0x2, 0x1, 0x1, 0x2 },
    { OP_MAX,    0x3, 0x3, 0x0, 0x0, 0x2, 0x1, 0x1, 0x0 },
    { OP_MIN,    0x3, 0x3, 0x0, 0x0, 0x2, 0x1, 0x1, 0x0 },
    { OP_MAD,    0x7, 0x0, 0x0, 0x8, 0x6, 0x1, 0x1, 0x0 }, // special constraint