diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_fs_generator.cpp')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_fs_generator.cpp | 17 |
1 files changed, 4 insertions, 13 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp index 0be0f86..ea46b1a 100644 --- a/src/mesa/drivers/dri/i965/brw_fs_generator.cpp +++ b/src/mesa/drivers/dri/i965/brw_fs_generator.cpp @@ -779,27 +779,18 @@ fs_generator::generate_tex(fs_inst *inst, struct brw_reg dst, struct brw_reg src brw_mark_surface_used(prog_data, sampler + base_binding_table_index); } else { /* Non-const sampler index */ - /* Note: this clobbers `dst` as a temporary before emitting the send */ struct brw_reg addr = vec1(retype(brw_address_reg(0), BRW_REGISTER_TYPE_UD)); - struct brw_reg temp = vec1(retype(dst, BRW_REGISTER_TYPE_UD)); - struct brw_reg sampler_reg = vec1(retype(sampler_index, BRW_REGISTER_TYPE_UD)); brw_push_insn_state(p); brw_set_default_mask_control(p, BRW_MASK_DISABLE); brw_set_default_access_mode(p, BRW_ALIGN_1); - /* Some care required: `sampler` and `temp` may alias: - * addr = sampler & 0xff - * temp = (sampler << 8) & 0xf00 - * addr = addr | temp - */ - brw_ADD(p, addr, sampler_reg, brw_imm_ud(base_binding_table_index)); - brw_SHL(p, temp, sampler_reg, brw_imm_ud(8u)); - brw_AND(p, temp, temp, brw_imm_ud(0x0f00)); - brw_AND(p, addr, addr, brw_imm_ud(0x0ff)); - brw_OR(p, addr, addr, temp); + /* addr = ((sampler * 0x101) + base_binding_table_index) & 0xfff */ + brw_MUL(p, addr, sampler_reg, brw_imm_ud(0x101)); + brw_ADD(p, addr, addr, brw_imm_ud(base_binding_table_index)); + brw_AND(p, addr, addr, brw_imm_ud(0xfff)); brw_pop_insn_state(p); |