From aae4223fbd2d94f922339baa11ffefdb88896770 Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Tue, 16 Sep 2014 11:20:52 -0700 Subject: [PATCH] vc4: Restructure depth input/output in fragment shaders. The goal here is to have an argument for the depth write opcode so that I can do computed depth. In the process, this makes the calculations that will be emitted more obvious in the QIR. --- src/gallium/drivers/vc4/vc4_program.c | 5 ++--- src/gallium/drivers/vc4/vc4_qir.c | 2 +- src/gallium/drivers/vc4/vc4_qir.h | 3 ++- src/gallium/drivers/vc4/vc4_qpu_emit.c | 19 ++++++++++++------- 4 files changed, 17 insertions(+), 12 deletions(-) diff --git a/src/gallium/drivers/vc4/vc4_program.c b/src/gallium/drivers/vc4/vc4_program.c index 6ae8103960e..8a83913bbe5 100644 --- a/src/gallium/drivers/vc4/vc4_program.c +++ b/src/gallium/drivers/vc4/vc4_program.c @@ -831,7 +831,7 @@ emit_fragcoord_input(struct vc4_compile *c, int attr) c->inputs[attr * 4 + 1] = qir_FRAG_Y(c); c->inputs[attr * 4 + 2] = qir_FMUL(c, - qir_FRAG_Z(c), + qir_ITOF(c, qir_FRAG_Z(c)), qir_uniform_f(c, 1.0 / 0xffffff)); c->inputs[attr * 4 + 3] = qir_FRAG_RCP_W(c); } @@ -1238,8 +1238,7 @@ emit_frag_end(struct vc4_compile *c) qir_TLB_DISCARD_SETUP(c, c->discard); if (c->fs_key->depth_enabled) { - qir_emit(c, qir_inst(QOP_TLB_PASSTHROUGH_Z_WRITE, c->undef, - c->undef, c->undef)); + qir_TLB_Z_WRITE(c, qir_FRAG_Z(c)); } bool color_written = false; diff --git a/src/gallium/drivers/vc4/vc4_qir.c b/src/gallium/drivers/vc4/vc4_qir.c index 0ab81d4d714..640589d23c0 100644 --- a/src/gallium/drivers/vc4/vc4_qir.c +++ b/src/gallium/drivers/vc4/vc4_qir.c @@ -77,7 +77,7 @@ static const struct qir_op_info qir_op_info[] = { [QOP_VPM_WRITE] = { "vpm_write", 0, 1, true }, [QOP_VPM_READ] = { "vpm_read", 0, 1, true }, [QOP_TLB_DISCARD_SETUP] = { "discard", 0, 1, true }, - [QOP_TLB_PASSTHROUGH_Z_WRITE] = { "tlb_passthrough_z", 0, 0, true }, + [QOP_TLB_Z_WRITE] = { "tlb_z", 0, 1, true }, [QOP_TLB_COLOR_WRITE] = { "tlb_color", 0, 1, true }, [QOP_TLB_COLOR_READ] = { "tlb_color_read", 1, 0, true }, [QOP_VARY_ADD_C] = { "vary_add_c", 1, 1 }, diff --git a/src/gallium/drivers/vc4/vc4_qir.h b/src/gallium/drivers/vc4/vc4_qir.h index 539993f41b4..f26f8963f34 100644 --- a/src/gallium/drivers/vc4/vc4_qir.h +++ b/src/gallium/drivers/vc4/vc4_qir.h @@ -97,7 +97,7 @@ enum qop { QOP_VPM_WRITE, QOP_VPM_READ, QOP_TLB_DISCARD_SETUP, - QOP_TLB_PASSTHROUGH_Z_WRITE, + QOP_TLB_Z_WRITE, QOP_TLB_COLOR_WRITE, QOP_TLB_COLOR_READ, QOP_VARY_ADD_C, @@ -361,6 +361,7 @@ QIR_ALU0(FRAG_Z) QIR_ALU0(FRAG_RCP_W) QIR_ALU0(TEX_RESULT) QIR_ALU0(TLB_COLOR_READ) +QIR_NODST_1(TLB_Z_WRITE) QIR_NODST_1(TLB_DISCARD_SETUP) static inline struct qreg diff --git a/src/gallium/drivers/vc4/vc4_qpu_emit.c b/src/gallium/drivers/vc4/vc4_qpu_emit.c index 4dd8609d9ca..26520fec22f 100644 --- a/src/gallium/drivers/vc4/vc4_qpu_emit.c +++ b/src/gallium/drivers/vc4/vc4_qpu_emit.c @@ -243,8 +243,7 @@ vc4_generate_code(struct vc4_compile *c) if (qinst->src[i].file == QFILE_TEMP) reg_uses_remaining[qinst->src[i].index]++; } - if (qinst->op == QOP_TLB_PASSTHROUGH_Z_WRITE || - qinst->op == QOP_FRAG_Z) + if (qinst->op == QOP_FRAG_Z) reg_in_use[3 + 32 + QPU_R_FRAG_PAYLOAD_ZW] = true; } @@ -362,6 +361,12 @@ vc4_generate_code(struct vc4_compile *c) if (reg.mux != QPU_MUX_R4) continue; break; + case QOP_FRAG_Z: + if (reg.mux != QPU_MUX_B || + reg.addr != QPU_R_FRAG_PAYLOAD_ZW) { + continue; + } + break; default: if (reg.mux == QPU_MUX_R4) continue; @@ -492,8 +497,9 @@ vc4_generate_code(struct vc4_compile *c) break; case QOP_FRAG_Z: - queue(c, qpu_a_ITOF(dst, - qpu_rb(QPU_R_FRAG_PAYLOAD_ZW))); + /* QOP_FRAG_Z doesn't emit instructions, just + * allocates the register to the Z payload. + */ break; case QOP_FRAG_RCP_W: @@ -509,9 +515,8 @@ vc4_generate_code(struct vc4_compile *c) *last_inst(c) |= QPU_SF; break; - case QOP_TLB_PASSTHROUGH_Z_WRITE: - queue(c, qpu_a_MOV(qpu_ra(QPU_W_TLB_Z), - qpu_rb(QPU_R_FRAG_PAYLOAD_ZW))); + case QOP_TLB_Z_WRITE: + queue(c, qpu_a_MOV(qpu_ra(QPU_W_TLB_Z), src[0])); if (discard) { set_last_cond_add(c, QPU_COND_ZS); } -- 2.30.2