diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vec4.cpp | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/i965/brw_vec4.cpp index 5e60eb657a7..a7694089e93 100644 --- a/src/mesa/drivers/dri/i965/brw_vec4.cpp +++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp @@ -1066,6 +1066,13 @@ vec4_instruction::can_reswizzle(const struct gen_device_info *devinfo, if (devinfo->gen == 6 && is_math() && swizzle != BRW_SWIZZLE_XYZW) return false; + /* We can't swizzle implicit accumulator access. We'd have to + * reswizzle the producer of the accumulator value in addition + * to the consumer (i.e. both MUL and MACH). Just skip this. + */ + if (reads_accumulator_implicitly()) + return false; + if (!can_do_writemask(devinfo) && dst_writemask != WRITEMASK_XYZW) return false; |