i965/vec4: Replace vec4_instruction::regs_written with ::size_written field in bytes.

The previous regs_written field can be recovered by rewriting each
rvalue reference of regs_written like 'x = i.regs_written' to 'x =
DIV_ROUND_UP(i.size_written, reg_unit)', and each lvalue reference
like 'i.regs_written = x' to 'i.size_written = x * reg_unit'.

For the same reason as in the previous patches, this doesn't attempt
to be particularly clever about simplifying the result in the interest
of keeping the rather lengthy patch as obvious as possible.  I'll come
back later to clean up any ugliness introduced here.

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>

9 files changed, 12 insertions, 11 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_ir_vec4.h b/src/mesa/drivers/dri/i965/brw_ir_vec4.h
index a1a201b..5a79062 100644
--- a/src/mesa/drivers/dri/i965/brw_ir_vec4.h
+++ b/src/mesa/drivers/dri/i965/brw_ir_vec4.h
@@ -264,7 +264,8 @@ inline unsigned
 regs_written(const vec4_instruction *inst)
 {
    /* XXX - Take into account register-misaligned offsets correctly. */
-   return inst->regs_written;
+   assert(inst->dst.file != UNIFORM && inst->dst.file != IMM);
+   return DIV_ROUND_UP(inst->size_written, REG_SIZE);
 }
 
 /**
diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp b/src/mesa/drivers/dri/i965/brw_vec4.cpp
index 3e57add..e54971f 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp
@@ -1133,7 +1133,7 @@ vec4_visitor::opt_register_coalesce()
                                                   inst) {
          _scan_inst = scan_inst;
 
-         if (inst->src[0].in_range(scan_inst->dst, scan_inst->regs_written)) {
+         if (inst->src[0].in_range(scan_inst->dst, DIV_ROUND_UP(scan_inst->size_written, REG_SIZE))) {
             /* Found something writing to the reg we want to coalesce away. */
             if (to_mrf) {
                /* SEND instructions can't have MRF as a destination. */
@@ -1169,7 +1169,7 @@ vec4_visitor::opt_register_coalesce()
             }
 
             /* This doesn't handle coalescing of multiple registers. */
-            if (scan_inst->regs_written > 1)
+            if (scan_inst->size_written > REG_SIZE)
                break;
 
 	    /* Mark which channels we found unconditional writes for. */
@@ -1197,7 +1197,7 @@ vec4_visitor::opt_register_coalesce()
          /* If somebody else writes the same channels of our destination here,
           * we can't coalesce before that.
           */
-         if (inst->dst.in_range(scan_inst->dst, scan_inst->regs_written) &&
+         if (inst->dst.in_range(scan_inst->dst, DIV_ROUND_UP(scan_inst->size_written, REG_SIZE)) &&
              (inst->dst.writemask & scan_inst->dst.writemask) != 0) {
             break;
          }
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_cmod_propagation.cpp b/src/mesa/drivers/dri/i965/brw_vec4_cmod_propagation.cpp
index 17f9e15..e74bc15 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_cmod_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_cmod_propagation.cpp
@@ -69,7 +69,7 @@ opt_cmod_propagation_local(bblock_t *block)
       bool read_flag = false;
       foreach_inst_in_block_reverse_starting_from(vec4_instruction, scan_inst, inst) {
          if (inst->src[0].in_range(scan_inst->dst,
-                                   scan_inst->regs_written)) {
+                                   DIV_ROUND_UP(scan_inst->size_written, REG_SIZE))) {
             if ((scan_inst->predicate && scan_inst->opcode != BRW_OPCODE_SEL) ||
                 scan_inst->dst.offset / REG_SIZE != inst->src[0].offset / REG_SIZE ||
                 (scan_inst->dst.writemask != WRITEMASK_X &&
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp b/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp
index 1f77d22..f98c7ac 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_copy_propagation.cpp
@@ -72,7 +72,7 @@ is_channel_updated(vec4_instruction *inst, src_reg *values[4], int ch)
    if (!src || src->file != VGRF)
       return false;
 
-   return (src->in_range(inst->dst, inst->regs_written) &&
+   return (src->in_range(inst->dst, DIV_ROUND_UP(inst->size_written, REG_SIZE)) &&
            inst->dst.writemask & (1 << BRW_GET_SWZ(src->swizzle, ch)));
 }
 
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_cse.cpp b/src/mesa/drivers/dri/i965/brw_vec4_cse.cpp
index f0908b9..1b91db9 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_cse.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_cse.cpp
@@ -129,7 +129,7 @@ instructions_match(vec4_instruction *a, vec4_instruction *b)
           a->shadow_compare == b->shadow_compare &&
           a->dst.writemask == b->dst.writemask &&
           a->force_writemask_all == b->force_writemask_all &&
-          a->regs_written == b->regs_written &&
+          a->size_written == b->size_written &&
           operands_match(a, b);
 }
 
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
index 60f8783..ba3bbdf 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_nir.cpp
@@ -839,7 +839,7 @@ vec4_visitor::nir_emit_intrinsic(nir_intrinsic_instr *instr)
          vec4_builder(this).at_end().annotate(current_annotation, base_ir);
       const dst_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_UD, 2);
       bld.emit(SHADER_OPCODE_MEMORY_FENCE, tmp)
-         ->regs_written = 2;
+         ->size_written = 2 * REG_SIZE;
       break;
    }
 
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_surface_builder.cpp b/src/mesa/drivers/dri/i965/brw_vec4_surface_builder.cpp
index 1db349a..19c685f 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_surface_builder.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_surface_builder.cpp
@@ -145,7 +145,7 @@ namespace brw {
             vec4_instruction *inst =
                bld.emit(op, dst, src_reg(payload), usurface, brw_imm_ud(arg));
             inst->mlen = sz;
-            inst->regs_written = ret_sz;
+            inst->size_written = ret_sz * REG_SIZE;
             inst->header_size = header_sz;
             inst->predicate = pred;
 
diff --git a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
index b5204e8..a4e4f40 100644
--- a/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_vec4_visitor.cpp
@@ -46,7 +46,7 @@ vec4_instruction::vec4_instruction(enum opcode opcode, const dst_reg &dst,
    this->predicate = BRW_PREDICATE_NONE;
    this->predicate_inverse = false;
    this->target = 0;
-   this->regs_written = (dst.file == BAD_FILE ? 0 : 1);
+   this->size_written = (dst.file == BAD_FILE ? 0 : REG_SIZE);
    this->shadow_compare = false;
    this->ir = NULL;
    this->urb_write_flags = BRW_URB_WRITE_NO_FLAGS;
diff --git a/src/mesa/drivers/dri/i965/test_vec4_cmod_propagation.cpp b/src/mesa/drivers/dri/i965/test_vec4_cmod_propagation.cpp
index 1192938..1323b65 100644
--- a/src/mesa/drivers/dri/i965/test_vec4_cmod_propagation.cpp
+++ b/src/mesa/drivers/dri/i965/test_vec4_cmod_propagation.cpp
@@ -370,7 +370,7 @@ TEST_F(cmod_propagation_test, intervening_dest_write)
    src_reg zero(brw_imm_f(0.0f));
    bld.ADD(offset(dest, 2), src0, src1);
    bld.emit(SHADER_OPCODE_TEX, dest, src2)
-      ->regs_written = 4;
+      ->size_written = 4 * REG_SIZE;
    bld.CMP(bld.null_reg_f(), offset(src_reg(dest), 2), zero, BRW_CONDITIONAL_GE);
 
    /* = Before =