tgsi: add precise flag to tgsi_instruction

Signed-off-by: Karol Herbst <karolherbst@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>

src/gallium/auxiliary/tgsi/tgsi_build.c

@@ -642,6 +642,7 @@ tgsi_default_instruction( void )
    instruction.Label = 0;
    instruction.Texture = 0;
    instruction.Memory = 0;
+   instruction.Precise = 0;
    instruction.Padding = 0;
 
    return instruction;

src/gallium/include/pipe/p_shader_tokens.h

@@ -638,7 +638,8 @@ struct tgsi_instruction
    unsigned Label      : 1;
    unsigned Texture    : 1;
    unsigned Memory     : 1;
-   unsigned Padding    : 2;
+   unsigned Precise    : 1;
+   unsigned Padding    : 1;
 };
 
 /*