diff options
| author | Kenneth Graunke <[email protected]> | 2012-03-30 13:58:06 -0700 |
|---|---|---|
| committer | Kenneth Graunke <[email protected]> | 2012-03-30 14:27:54 -0700 |
| commit | 01044fce6b3de11635ea5078b76ffee1a33b3802 (patch) | |
| tree | 7c237b2a3d4e7a5f876339d18cf1edb38f93bc06 /src/mesa | |
| parent | 99a192ce7d8690f44a1f23a432607b6ce5031942 (diff) | |
i965: Avoid explicit accumulator operands in SIMD16 mode on Gen7.
According to the BSpec ISA volume's "Accumulator Register" section:
"[DevIVB] SIMD16 execution on dwords is not allowed when accumulator is
explicit source or destination operand."
Fixes piglit tests:
- fs-multiply-const-ivec4
- fs-multiply-const-uvec4
- fs-multiply-ivec4-const
- fs-multiply-uvec4-const
Signed-off-by: Kenneth Graunke <[email protected]>
Diffstat (limited to 'src/mesa')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_visitor.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp index b4ef80b6546..a672ee624b2 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp @@ -337,6 +337,9 @@ fs_visitor::visit(ir_expression *ir) * FINISHME: Emit just the MUL if we know an operand is small * enough. */ + if (intel->gen >= 7 && c->dispatch_width == 16) + fail("16-wide explicit accumulator operands unsupported\n"); + struct brw_reg acc = retype(brw_acc_reg(), BRW_REGISTER_TYPE_D); emit(BRW_OPCODE_MUL, acc, op[0], op[1]); |