Certain instructions write more than one register. Texturing, for
example, returns 4 registers. (We set rlen to 4 even for TXS and float
shadow sampling.) Some math functions return 2. Most return 1.
The next commit introduces a use of this function.
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
(cherry picked from commit
8ab02b511882857a09fceed0e93bf4a0b25c17b2)
offset == inst->offset);
}
+ int regs_written()
+ {
+ if (is_tex())
+ return 4;
+
+ /* The SINCOS and INT_DIV_QUOTIENT_AND_REMAINDER math functions return 2,
+ * but we don't currently use them...nor do we have an opcode for them.
+ */
+
+ return 1;
+ }
+
bool is_tex()
{
return (opcode == SHADER_OPCODE_TEX ||