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Diffstat (limited to 'src/gallium/drivers/i965/brw_wm_pass2.c')
-rw-r--r--src/gallium/drivers/i965/brw_wm_pass2.c334
1 files changed, 0 insertions, 334 deletions
diff --git a/src/gallium/drivers/i965/brw_wm_pass2.c b/src/gallium/drivers/i965/brw_wm_pass2.c
deleted file mode 100644
index 19248b45195..00000000000
--- a/src/gallium/drivers/i965/brw_wm_pass2.c
+++ /dev/null
@@ -1,334 +0,0 @@
-/*
- Copyright (C) Intel Corp. 2006. All Rights Reserved.
- Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
- develop this 3D driver.
-
- Permission is hereby granted, free of charge, to any person obtaining
- a copy of this software and associated documentation files (the
- "Software"), to deal in the Software without restriction, including
- without limitation the rights to use, copy, modify, merge, publish,
- distribute, sublicense, and/or sell copies of the Software, and to
- permit persons to whom the Software is furnished to do so, subject to
- the following conditions:
-
- The above copyright notice and this permission notice (including the
- next paragraph) shall be included in all copies or substantial
- portions of the Software.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
- LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
- **********************************************************************/
- /*
- * Authors:
- * Keith Whitwell <[email protected]>
- */
-
-
-#include "brw_debug.h"
-#include "brw_wm.h"
-
-
-/* Use these to force spilling so that that functionality can be
- * tested with known-good examples rather than having to construct new
- * tests.
- */
-#define TEST_PAYLOAD_SPILLS 0
-#define TEST_DST_SPILLS 0
-
-static void spill_value(struct brw_wm_compile *c,
- struct brw_wm_value *value);
-
-static void prealloc_reg(struct brw_wm_compile *c,
- struct brw_wm_value *value,
- GLuint reg)
-{
- if (value->lastuse) {
- /* Set nextuse to zero, it will be corrected by
- * update_register_usage().
- */
- c->pass2_grf[reg].value = value;
- c->pass2_grf[reg].nextuse = 0;
-
- value->resident = &c->pass2_grf[reg];
- value->hw_reg = brw_vec8_grf(reg*2, 0);
-
- if (TEST_PAYLOAD_SPILLS)
- spill_value(c, value);
- }
-}
-
-
-/* Initialize all the register values. Do the initial setup
- * calculations for interpolants.
- */
-static void init_registers( struct brw_wm_compile *c )
-{
- GLuint reg = 0;
- GLuint j;
-
- for (j = 0; j < c->grf_limit; j++)
- c->pass2_grf[j].nextuse = BRW_WM_MAX_INSN;
-
- /* Pre-allocate incoming payload regs:
- */
- for (j = 0; j < c->key.nr_depth_regs; j++)
- prealloc_reg(c, &c->payload.depth[j], reg++);
-
- for (j = 0; j < c->nr_creg; j++)
- prealloc_reg(c, &c->creg[j], reg++);
-
- reg++; /* XXX: skip over position output */
-
- /* XXX: currently just hope the VS outputs line up with FS inputs:
- */
- for (j = 0; j < c->key.nr_inputs; j++)
- prealloc_reg(c, &c->payload.input_interp[j], reg++);
-
- c->prog_data.first_curbe_grf = c->key.nr_depth_regs * 2;
- c->prog_data.urb_read_length = (c->key.nr_inputs + 1) * 2;
- c->prog_data.curb_read_length = c->nr_creg * 2;
-
- /* Note this allocation:
- */
- c->max_wm_grf = reg * 2;
-}
-
-
-/* Update the nextuse value for each register in our file.
- */
-static void update_register_usage(struct brw_wm_compile *c,
- GLuint thisinsn)
-{
- GLuint i;
-
- for (i = 1; i < c->grf_limit; i++) {
- struct brw_wm_grf *grf = &c->pass2_grf[i];
-
- /* Only search those which can change:
- */
- if (grf->nextuse < thisinsn) {
- const struct brw_wm_ref *ref = grf->value->lastuse;
-
- /* Has last use of value been passed?
- */
- if (ref->insn < thisinsn) {
- grf->value->resident = 0;
- grf->value = 0;
- grf->nextuse = BRW_WM_MAX_INSN;
- }
- else {
- /* Else loop through chain to update:
- */
- while (ref->prevuse && ref->prevuse->insn >= thisinsn)
- ref = ref->prevuse;
-
- grf->nextuse = ref->insn;
- }
- }
- }
-}
-
-
-static void spill_value(struct brw_wm_compile *c,
- struct brw_wm_value *value)
-{
- /* Allocate a spill slot. Note that allocations start from 0x40 -
- * the first slot is reserved to mean "undef" in brw_wm_emit.c
- */
- if (!value->spill_slot) {
- c->last_scratch += 0x40;
- value->spill_slot = c->last_scratch;
- }
-
- /* The spill will be done in brw_wm_emit.c immediately after the
- * value is calculated, so we can just take this reg without any
- * further work.
- */
- value->resident->value = NULL;
- value->resident->nextuse = BRW_WM_MAX_INSN;
- value->resident = NULL;
-}
-
-
-
-/* Search for contiguous region with the most distant nearest
- * member. Free regs count as very distant.
- *
- * TODO: implement spill-to-reg so that we can rearrange discontigous
- * free regs and then spill the oldest non-free regs in sequence.
- * This would mean inserting instructions in this pass.
- */
-static GLuint search_contiguous_regs(struct brw_wm_compile *c,
- GLuint nr,
- GLuint thisinsn)
-{
- struct brw_wm_grf *grf = c->pass2_grf;
- GLuint furthest = 0;
- GLuint reg = 0;
- GLuint i, j;
-
- /* Start search at 1: r0 is special and can't be used or spilled.
- */
- for (i = 1; i < c->grf_limit && furthest < BRW_WM_MAX_INSN; i++) {
- GLuint group_nextuse = BRW_WM_MAX_INSN;
-
- for (j = 0; j < nr; j++) {
- if (grf[i+j].nextuse < group_nextuse)
- group_nextuse = grf[i+j].nextuse;
- }
-
- if (group_nextuse > furthest) {
- furthest = group_nextuse;
- reg = i;
- }
- }
-
- assert(furthest != thisinsn);
-
- /* Any non-empty regs will need to be spilled:
- */
- for (j = 0; j < nr; j++)
- if (grf[reg+j].value)
- spill_value(c, grf[reg+j].value);
-
- return reg;
-}
-
-
-static void alloc_contiguous_dest(struct brw_wm_compile *c,
- struct brw_wm_value *dst[],
- GLuint nr,
- GLuint thisinsn)
-{
- GLuint reg = search_contiguous_regs(c, nr, thisinsn);
- GLuint i;
-
- for (i = 0; i < nr; i++) {
- if (!dst[i]) {
- /* Need to grab a dummy value in TEX case. Don't introduce
- * it into the tracking scheme.
- */
- dst[i] = &c->vreg[c->nr_vreg++];
- }
- else {
- assert(!dst[i]->resident);
- assert(c->pass2_grf[reg+i].nextuse != thisinsn);
-
- c->pass2_grf[reg+i].value = dst[i];
- c->pass2_grf[reg+i].nextuse = thisinsn;
-
- dst[i]->resident = &c->pass2_grf[reg+i];
- }
-
- dst[i]->hw_reg = brw_vec8_grf((reg+i)*2, 0);
- }
-
- if ((reg+nr)*2 > c->max_wm_grf)
- c->max_wm_grf = (reg+nr) * 2;
-}
-
-
-static void load_args(struct brw_wm_compile *c,
- struct brw_wm_instruction *inst)
-{
- GLuint thisinsn = inst - c->instruction;
- GLuint i,j;
-
- for (i = 0; i < 3; i++) {
- for (j = 0; j < 4; j++) {
- struct brw_wm_ref *ref = inst->src[i][j];
-
- if (ref) {
- if (!ref->value->resident) {
- /* Need to bring the value in from scratch space. The code for
- * this will be done in brw_wm_emit.c, here we just do the
- * register allocation and mark the ref as requiring a fill.
- */
- GLuint reg = search_contiguous_regs(c, 1, thisinsn);
-
- c->pass2_grf[reg].value = ref->value;
- c->pass2_grf[reg].nextuse = thisinsn;
-
- ref->value->resident = &c->pass2_grf[reg];
-
- /* Note that a fill is required:
- */
- ref->unspill_reg = reg*2;
- }
-
- /* Adjust the hw_reg to point at the value's current location:
- */
- assert(ref->value == ref->value->resident->value);
- ref->hw_reg.nr += (ref->value->resident - c->pass2_grf) * 2;
- }
- }
- }
-}
-
-
-
-/* Step 3: Work forwards once again. Perform register allocations,
- * taking into account instructions like TEX which require contiguous
- * result registers. Where necessary spill registers to scratch space
- * and reload later.
- */
-void brw_wm_pass2( struct brw_wm_compile *c )
-{
- GLuint insn;
- GLuint i;
-
- init_registers(c);
-
- for (insn = 0; insn < c->nr_insns; insn++) {
- struct brw_wm_instruction *inst = &c->instruction[insn];
-
- /* Update registers' nextuse values:
- */
- update_register_usage(c, insn);
-
- /* May need to unspill some args.
- */
- load_args(c, inst);
-
- /* Allocate registers to hold results:
- */
- switch (inst->opcode) {
- case TGSI_OPCODE_TEX:
- case TGSI_OPCODE_TXB:
- case TGSI_OPCODE_TXP:
- alloc_contiguous_dest(c, inst->dst, 4, insn);
- break;
-
- default:
- for (i = 0; i < 4; i++) {
- if (inst->writemask & (1<<i)) {
- assert(inst->dst[i]);
- alloc_contiguous_dest(c, &inst->dst[i], 1, insn);
- }
- }
- break;
- }
-
- if (TEST_DST_SPILLS && inst->opcode != WM_PIXELXY) {
- for (i = 0; i < 4; i++)
- if (inst->dst[i])
- spill_value(c, inst->dst[i]);
- }
- }
-
- if (BRW_DEBUG & DEBUG_WM) {
- brw_wm_print_program(c, "pass2");
- }
-
- c->state = PASS2_DONE;
-
- if (BRW_DEBUG & DEBUG_WM) {
- brw_wm_print_program(c, "pass2/done");
- }
-}
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