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i965: Add "discard" support to the new FS backend.

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Fixes 3 testcases related to discard.
This commit is contained in:
Eric Anholt 2010-08-28 22:56:33 -07:00
parent 4ff25c2106
commit b0a933a4d9
1 changed files with 19 additions and 1 deletions
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20
src/mesa/drivers/dri/i965/brw_fs.cpp
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@ -70,6 +70,7 @@ enum fs_opcodes {
FS_OPCODE_TEX,
FS_OPCODE_TXB,
FS_OPCODE_TXL,
FS_OPCODE_DISCARD,
};
static int using_new_fs = -1;
@ -433,6 +434,7 @@ public:
struct brw_reg *src);
void generate_tex(fs_inst *inst, struct brw_reg dst, struct brw_reg src);
void generate_math(fs_inst *inst, struct brw_reg dst, struct brw_reg *src);
void generate_discard(fs_inst *inst);
void emit_dummy_fs();
void emit_interpolation();
@ -995,7 +997,9 @@ fs_visitor::visit(ir_swizzle *ir)
void
fs_visitor::visit(ir_discard *ir)
{
assert(!"FINISHME");
assert(ir->condition == NULL); /* FINISHME */
emit(fs_inst(FS_OPCODE_DISCARD));
}
void
@ -1460,6 +1464,17 @@ fs_visitor::generate_tex(fs_inst *inst, struct brw_reg dst, struct brw_reg src)
BRW_SAMPLER_SIMD_MODE_SIMD8);
}
void
fs_visitor::generate_discard(fs_inst *inst)
{
struct brw_reg g0 = retype(brw_vec1_grf(0, 0), BRW_REGISTER_TYPE_UW);
brw_push_insn_state(p);
brw_set_mask_control(p, BRW_MASK_DISABLE);
brw_NOT(p, c->emit_mask_reg, brw_mask_reg(1)); /* IMASK */
brw_AND(p, g0, c->emit_mask_reg, g0);
brw_pop_insn_state(p);
}
static void
trivial_assign_reg(int header_size, fs_reg *reg)
{
@ -1694,6 +1709,9 @@ fs_visitor::generate_code()
case FS_OPCODE_TXL:
generate_tex(inst, dst, src[0]);
break;
case FS_OPCODE_DISCARD:
generate_discard(inst);
break;
case FS_OPCODE_FB_WRITE:
generate_fb_write(inst);
break;