CS_LOCALS(r300);
if (fb->nr_cbufs) {
- if (fb->cbufs[0]->format == PIPE_FORMAT_R16G16B16A16_FLOAT)
+ if (fb->cbufs[0]->format == PIPE_FORMAT_R16G16B16A16_FLOAT) {
WRITE_CS_TABLE(blend->cb_noclamp, size);
- else
- WRITE_CS_TABLE(blend->cb_clamp, size);
+ } else {
+ unsigned swz = r300_surface(fb->cbufs[0])->colormask_swizzle;
+ WRITE_CS_TABLE(blend->cb_clamp[swz], size);
+ }
} else {
WRITE_CS_TABLE(blend->cb_no_readwrite, size);
}
struct r300_dsa_state* dsa = (struct r300_dsa_state*)state;
struct pipe_framebuffer_state* fb =
(struct pipe_framebuffer_state*)r300->fb_state.state;
+ boolean is_r500 = r300->screen->caps.is_r500;
CS_LOCALS(r300);
+ uint32_t alpha_func = dsa->alpha_function;
- if (fb->zsbuf) {
- if (fb->nr_cbufs && fb->cbufs[0]->format == PIPE_FORMAT_R16G16B16A16_FLOAT)
- WRITE_CS_TABLE(&dsa->cb_begin_fp16, size);
- else
- WRITE_CS_TABLE(&dsa->cb_begin, size);
- } else {
- if (fb->nr_cbufs && fb->cbufs[0]->format == PIPE_FORMAT_R16G16B16A16_FLOAT)
- WRITE_CS_TABLE(dsa->cb_fp16_zb_no_readwrite, size);
- else
- WRITE_CS_TABLE(dsa->cb_zb_no_readwrite, size);
+ /* Choose the alpha ref value between 8-bit (FG_ALPHA_FUNC.AM_VAL) and
+ * 16-bit (FG_ALPHA_VALUE). */
+ if (is_r500 && (alpha_func & R300_FG_ALPHA_FUNC_ENABLE)) {
+ if (fb->nr_cbufs && fb->cbufs[0]->format == PIPE_FORMAT_R16G16B16A16_FLOAT) {
+ alpha_func |= R500_FG_ALPHA_FUNC_FP16_ENABLE;
+ } else {
+ alpha_func |= R500_FG_ALPHA_FUNC_8BIT;
+ }
+ }
+
+ /* Setup alpha-to-coverage. */
+ if (r300->alpha_to_coverage && r300->msaa_enable) {
+ /* Always set 3/6, it improves precision even for 2x and 4x MSAA. */
+ alpha_func |= R300_FG_ALPHA_FUNC_MASK_ENABLE |
+ R300_FG_ALPHA_FUNC_CFG_3_OF_6;
}
+
+ BEGIN_CS(size);
+ OUT_CS_REG(R300_FG_ALPHA_FUNC, alpha_func);
+ OUT_CS_TABLE(fb->zsbuf ? &dsa->cb_begin : dsa->cb_zb_no_readwrite, size-2);
+ END_CS;
}
static void get_rc_constant_state(
case RC_STATE_R300_TEXSCALE_FACTOR:
tex = r300_resource(texstate->sampler_views[constant->u.State[1]]->base.texture);
/* Add a small number to the texture size to work around rounding errors in hw. */
- vec[0] = tex->b.b.b.width0 / (tex->tex.width0 + 0.001f);
- vec[1] = tex->b.b.b.height0 / (tex->tex.height0 + 0.001f);
- vec[2] = tex->b.b.b.depth0 / (tex->tex.depth0 + 0.001f);
+ vec[0] = tex->b.b.width0 / (tex->tex.width0 + 0.001f);
+ vec[1] = tex->b.b.height0 / (tex->tex.height0 + 0.001f);
+ vec[2] = tex->b.b.depth0 / (tex->tex.depth0 + 0.001f);
vec[3] = 1;
break;
OUT_CS_REG(R300_GB_AA_CONFIG, aa->aa_config);
if (aa->dest) {
- OUT_CS_REG(R300_RB3D_AARESOLVE_OFFSET, aa->dest->offset);
+ OUT_CS_REG_SEQ(R300_RB3D_AARESOLVE_OFFSET, 3);
+ OUT_CS(aa->dest->offset);
+ OUT_CS(aa->dest->pitch & R300_RB3D_AARESOLVE_PITCH_MASK);
+ OUT_CS(R300_RB3D_AARESOLVE_CTL_AARESOLVE_MODE_RESOLVE |
+ R300_RB3D_AARESOLVE_CTL_AARESOLVE_ALPHA_AVERAGE);
OUT_CS_RELOC(aa->dest);
- OUT_CS_REG(R300_RB3D_AARESOLVE_PITCH, aa->dest->pitch);
+ } else {
+ OUT_CS_REG(R300_RB3D_AARESOLVE_CTL, 0);
}
- OUT_CS_REG(R300_RB3D_AARESOLVE_CTL, aa->aaresolve_ctl);
END_CS;
}
BEGIN_CS(size);
- /* NUM_MULTIWRITES replicates COLOR[0] to all colorbuffers, which is not
- * what we usually want. */
if (r300->screen->caps.is_r500) {
rb3d_cctl = R300_RB3D_CCTL_INDEPENDENT_COLORFORMAT_ENABLE_ENABLE;
}
+ /* NUM_MULTIWRITES replicates COLOR[0] to all colorbuffers. */
if (fb->nr_cbufs && r300->fb_multiwrite) {
rb3d_cctl |= R300_RB3D_CCTL_NUM_MULTIWRITES(fb->nr_cbufs);
}
+ if (r300->cmask_in_use) {
+ rb3d_cctl |= R300_RB3D_CCTL_AA_COMPRESSION_ENABLE |
+ R300_RB3D_CCTL_CMASK_ENABLE;
+ }
OUT_CS_REG(R300_RB3D_CCTL, rb3d_cctl);
OUT_CS_REG(R300_RB3D_COLORPITCH0 + (4 * i), surf->pitch);
OUT_CS_RELOC(surf);
+
+ if (r300->cmask_in_use && i == 0) {
+ OUT_CS_REG(R300_RB3D_CMASK_OFFSET0, 0);
+ OUT_CS_REG(R300_RB3D_CMASK_PITCH0, surf->pitch_cmask);
+ OUT_CS_REG(R300_RB3D_COLOR_CLEAR_VALUE, r300->color_clear_value);
+ }
}
/* Set up the ZB part of the CBZB clear. */
OUT_CS_REG(R300_ZB_ZMASK_OFFSET, 0);
OUT_CS_REG(R300_ZB_ZMASK_PITCH, surf->pitch_zmask);
}
- /* Set up a dummy zbuffer. Otherwise occlusion queries won't work.
- * Use the first colorbuffer, we will disable writes in the DSA state
- * so as not to corrupt it. */
- } else if (fb->nr_cbufs) {
- surf = r300_surface(fb->cbufs[0]);
-
- OUT_CS_REG(R300_ZB_FORMAT, R300_DEPTHFORMAT_16BIT_INT_Z);
-
- OUT_CS_REG(R300_ZB_DEPTHOFFSET, 0);
- OUT_CS_RELOC(surf);
-
- OUT_CS_REG(R300_ZB_DEPTHPITCH, 4 | R300_DEPTHMICROTILE_TILED_SQUARE);
- OUT_CS_RELOC(surf);
}
END_CS;
r300_emit_hyperz_state(r300, r300->hyperz_state.size, &z);
}
+#define R300_NIBBLES(x0, y0, x1, y1, x2, y2, d0y, d0x) \
+ (((x0) & 0xf) | (((y0) & 0xf) << 4) | \
+ (((x1) & 0xf) << 8) | (((y1) & 0xf) << 12) | \
+ (((x2) & 0xf) << 16) | (((y2) & 0xf) << 20) | \
+ (((d0y) & 0xf) << 24) | (((d0x) & 0xf) << 28))
+
+static unsigned r300_get_mspos(int index, unsigned *p)
+{
+ unsigned reg, i, distx, disty, dist;
+
+ if (index == 0) {
+ /* MSPOS0 contains positions for samples 0,1,2 as (X,Y) pairs of nibbles,
+ * followed by a (Y,X) pair containing the minimum distance from the pixel
+ * edge:
+ * X0, Y0, X1, Y1, X2, Y2, D0_Y, D0_X
+ *
+ * There is a quirk when setting D0_X. The value represents the distance
+ * from the left edge of the pixel quad to the first sample in subpixels.
+ * All values less than eight should use the actual value, but „7‟ should
+ * be used for the distance „8‟. The hardware will convert 7 into 8 internally.
+ */
+ distx = 11;
+ for (i = 0; i < 12; i += 2) {
+ if (p[i] < distx)
+ distx = p[i];
+ }
+
+ disty = 11;
+ for (i = 1; i < 12; i += 2) {
+ if (p[i] < disty)
+ disty = p[i];
+ }
+
+ if (distx == 8)
+ distx = 7;
+
+ reg = R300_NIBBLES(p[0], p[1], p[2], p[3], p[4], p[5], disty, distx);
+ } else {
+ /* MSPOS1 contains positions for samples 3,4,5 as (X,Y) pairs of nibbles,
+ * followed by the minimum distance from the pixel edge (not sure if X or Y):
+ * X3, Y3, X4, Y4, X5, Y5, D1
+ */
+ dist = 11;
+ for (i = 0; i < 12; i++) {
+ if (p[i] < dist)
+ dist = p[i];
+ }
+
+ reg = R300_NIBBLES(p[6], p[7], p[8], p[9], p[10], p[11], dist, 0);
+ }
+ return reg;
+}
+
void r300_emit_fb_state_pipelined(struct r300_context *r300,
unsigned size, void *state)
{
+ /* The sample coordinates are in the range [0,11], because
+ * GB_TILE_CONFIG.SUBPIXEL is set to the 1/12 subpixel precision.
+ *
+ * Some sample coordinates reach to neighboring pixels and should not be used.
+ * (e.g. Y=11)
+ *
+ * The unused samples must be set to the positions of other valid samples. */
+ static unsigned sample_locs_1x[12] = {
+ 6,6, 6,6, 6,6, 6,6, 6,6, 6,6
+ };
+ static unsigned sample_locs_2x[12] = {
+ 3,9, 9,3, 9,3, 9,3, 9,3, 9,3
+ };
+ static unsigned sample_locs_4x[12] = {
+ 4,4, 8,8, 2,10, 10,2, 10,2, 10,2
+ };
+ static unsigned sample_locs_6x[12] = {
+ 3,1, 7,3, 11,5, 1,7, 5,9, 9,10
+ };
+
struct pipe_framebuffer_state* fb =
(struct pipe_framebuffer_state*)r300->fb_state.state;
unsigned i, num_cbufs = fb->nr_cbufs;
OUT_CS(R300_US_OUT_FMT_UNUSED);
}
- /* Multisampling. Depends on framebuffer sample count.
- * These are pipelined regs and as such cannot be moved
- * to the AA state. */
- mspos0 = 0x66666666;
- mspos1 = 0x6666666;
-
- if (fb->nr_cbufs && fb->cbufs[0]->texture->nr_samples > 1) {
- /* Subsample placement. These may not be optimal. */
- switch (fb->cbufs[0]->texture->nr_samples) {
- case 2:
- mspos0 = 0x33996633;
- mspos1 = 0x6666663;
- break;
- case 3:
- mspos0 = 0x33936933;
- mspos1 = 0x6666663;
- break;
- case 4:
- mspos0 = 0x33939933;
- mspos1 = 0x3966663;
- break;
- case 6:
- mspos0 = 0x22a2aa22;
- mspos1 = 0x2a65672;
- break;
- default:
- debug_printf("r300: Bad number of multisamples!\n");
- }
+ /* Set sample positions. It depends on the framebuffer sample count.
+ * These are pipelined regs and as such cannot be moved to the AA state.
+ */
+ switch (r300->num_samples) {
+ default:
+ mspos0 = r300_get_mspos(0, sample_locs_1x);
+ mspos1 = r300_get_mspos(1, sample_locs_1x);
+ break;
+ case 2:
+ mspos0 = r300_get_mspos(0, sample_locs_2x);
+ mspos1 = r300_get_mspos(1, sample_locs_2x);
+ break;
+ case 4:
+ mspos0 = r300_get_mspos(0, sample_locs_4x);
+ mspos1 = r300_get_mspos(1, sample_locs_4x);
+ break;
+ case 6:
+ mspos0 = r300_get_mspos(0, sample_locs_6x);
+ mspos1 = r300_get_mspos(1, sample_locs_6x);
+ break;
}
OUT_CS_REG_SEQ(R300_GB_MSPOS0, 2);
return;
BEGIN_CS(size);
- if (r300->screen->caps.family == CHIP_FAMILY_RV530) {
+ if (r300->screen->caps.family == CHIP_RV530) {
OUT_CS_REG(RV530_FG_ZBREG_DEST, RV530_FG_ZBREG_DEST_PIPE_SELECT_ALL);
} else {
OUT_CS_REG(R300_SU_REG_DEST, R300_RASTER_PIPE_SELECT_ALL);
if (query->begin_emitted == FALSE)
return;
- if (caps->family == CHIP_FAMILY_RV530) {
+ if (caps->family == CHIP_RV530) {
if (r300->screen->info.r300_num_z_pipes == 2)
rv530_emit_query_end_double_z(r300, query);
else
query->num_results += query->num_pipes;
/* XXX grab all the results and reset the counter. */
- if (query->num_results >= query->buffer_size / 4 - 4) {
- query->num_results = (query->buffer_size / 4) / 2;
+ if (query->num_results >= query->buf->size / 4 - 4) {
+ query->num_results = (query->buf->size / 4) / 2;
fprintf(stderr, "r300: Rewinding OQBO...\n");
}
}
END_CS;
}
+void r300_emit_sample_mask(struct r300_context *r300,
+ unsigned size, void *state)
+{
+ unsigned mask = (*(unsigned*)state) & ((1 << 6)-1);
+ CS_LOCALS(r300);
+
+ BEGIN_CS(size);
+ OUT_CS_REG(R300_SC_SCREENDOOR,
+ mask | (mask << 6) | (mask << 12) | (mask << 18));
+ END_CS;
+}
+
void r300_emit_scissor_state(struct r300_context* r300,
unsigned size, void* state)
{
void r300_emit_vertex_arrays(struct r300_context* r300, int offset,
boolean indexed, int instance_id)
{
- struct pipe_vertex_buffer *vbuf = r300->vbuf_mgr->vertex_buffer;
- struct pipe_resource **valid_vbuf = r300->vbuf_mgr->real_vertex_buffer;
+ struct pipe_vertex_buffer *vbuf = r300->vertex_buffer;
struct pipe_vertex_element *velem = r300->velems->velem;
struct r300_resource *buf;
int i;
}
for (i = 0; i < vertex_array_count; i++) {
- buf = r300_resource(valid_vbuf[velem[i].vertex_buffer_index]);
+ buf = r300_resource(vbuf[velem[i].vertex_buffer_index].buffer);
OUT_CS_RELOC(buf);
}
} else {
}
for (i = 0; i < vertex_array_count; i++) {
- buf = r300_resource(valid_vbuf[velem[i].vertex_buffer_index]);
+ buf = r300_resource(vbuf[velem[i].vertex_buffer_index].buffer);
OUT_CS_RELOC(buf);
}
}
(r300->vertex_info.size << 8));
OUT_CS(r300->draw_vbo_offset);
OUT_CS(0);
- OUT_CS_RELOC(r300_resource(r300->vbo));
+
+ assert(r300->vbo_cs);
+ cs_winsys->cs_write_reloc(cs_copy, r300->vbo_cs);
+ CS_USED_DW(2);
END_CS;
}
R300_PVS_VF_MAX_VTX_NUM(12) |
(r300screen->caps.is_r500 ? R500_TCL_STATE_OPTIMIZATION : 0));
- /* Emit flow control instructions. */
- if (code->num_fc_ops) {
-
- OUT_CS_REG(R300_VAP_PVS_FLOW_CNTL_OPC, code->fc_ops);
- if (r300screen->caps.is_r500) {
- OUT_CS_REG_SEQ(R500_VAP_PVS_FLOW_CNTL_ADDRS_LW_0, code->num_fc_ops * 2);
- OUT_CS_TABLE(code->fc_op_addrs.r500, code->num_fc_ops * 2);
- } else {
- OUT_CS_REG_SEQ(R300_VAP_PVS_FLOW_CNTL_ADDRS_0, code->num_fc_ops);
- OUT_CS_TABLE(code->fc_op_addrs.r300, code->num_fc_ops);
- }
- OUT_CS_REG_SEQ(R300_VAP_PVS_FLOW_CNTL_LOOP_INDEX_0, code->num_fc_ops);
- OUT_CS_TABLE(code->fc_loop_index, code->num_fc_ops);
+ /* Emit flow control instructions. Even if there are no fc instructions,
+ * we still need to write the registers to make sure they are cleared. */
+ OUT_CS_REG(R300_VAP_PVS_FLOW_CNTL_OPC, code->fc_ops);
+ if (r300screen->caps.is_r500) {
+ OUT_CS_REG_SEQ(R500_VAP_PVS_FLOW_CNTL_ADDRS_LW_0, R300_VS_MAX_FC_OPS * 2);
+ OUT_CS_TABLE(code->fc_op_addrs.r500, R300_VS_MAX_FC_OPS * 2);
+ } else {
+ OUT_CS_REG_SEQ(R300_VAP_PVS_FLOW_CNTL_ADDRS_0, R300_VS_MAX_FC_OPS);
+ OUT_CS_TABLE(code->fc_op_addrs.r300, R300_VS_MAX_FC_OPS);
}
+ OUT_CS_REG_SEQ(R300_VAP_PVS_FLOW_CNTL_LOOP_INDEX_0, R300_VS_MAX_FC_OPS);
+ OUT_CS_TABLE(code->fc_loop_index, R300_VS_MAX_FC_OPS);
END_CS;
}
tex = r300_resource(fb->zsbuf->texture);
BEGIN_CS(size);
+ OUT_CS_REG(R300_ZB_ZCACHE_CTLSTAT,
+ R300_ZB_ZCACHE_CTLSTAT_ZC_FLUSH_FLUSH_AND_FREE |
+ R300_ZB_ZCACHE_CTLSTAT_ZC_FREE_FREE);
OUT_CS_PKT3(R300_PACKET3_3D_CLEAR_HIZ, 2);
OUT_CS(0);
OUT_CS(tex->tex.hiz_dwords[fb->zsbuf->u.tex.level]);
tex = r300_resource(fb->zsbuf->texture);
BEGIN_CS(size);
+ OUT_CS_REG(R300_ZB_ZCACHE_CTLSTAT,
+ R300_ZB_ZCACHE_CTLSTAT_ZC_FLUSH_FLUSH_AND_FREE |
+ R300_ZB_ZCACHE_CTLSTAT_ZC_FREE_FREE);
OUT_CS_PKT3(R300_PACKET3_3D_CLEAR_ZMASK, 2);
OUT_CS(0);
OUT_CS(tex->tex.zmask_dwords[fb->zsbuf->u.tex.level]);
r300_mark_atom_dirty(r300, &r300->hyperz_state);
}
+void r300_emit_cmask_clear(struct r300_context *r300, unsigned size, void *state)
+{
+ struct pipe_framebuffer_state *fb =
+ (struct pipe_framebuffer_state*)r300->fb_state.state;
+ struct r300_resource *tex;
+ CS_LOCALS(r300);
+
+ tex = r300_resource(fb->cbufs[0]->texture);
+
+ BEGIN_CS(size);
+ OUT_CS_REG(R300_RB3D_DSTCACHE_CTLSTAT,
+ R300_RB3D_DSTCACHE_CTLSTAT_DC_FREE_FREE_3D_TAGS |
+ R300_RB3D_DSTCACHE_CTLSTAT_DC_FLUSH_FLUSH_DIRTY_3D);
+ OUT_CS_PKT3(R300_PACKET3_3D_CLEAR_CMASK, 2);
+ OUT_CS(0);
+ OUT_CS(tex->tex.cmask_dwords);
+ OUT_CS(0);
+ END_CS;
+
+ /* Mark the current zbuffer's zmask as in use. */
+ r300->cmask_in_use = TRUE;
+ r300_mark_fb_state_dirty(r300, R300_CHANGED_CMASK_ENABLE);
+}
+
void r300_emit_ztop_state(struct r300_context* r300,
unsigned size, void* state)
{
{
struct pipe_framebuffer_state *fb =
(struct pipe_framebuffer_state*)r300->fb_state.state;
+ struct r300_aa_state *aa = (struct r300_aa_state*)r300->aa_state.state;
struct r300_textures_state *texstate =
(struct r300_textures_state*)r300->textures_state.state;
struct r300_resource *tex;
for (i = 0; i < fb->nr_cbufs; i++) {
tex = r300_resource(fb->cbufs[i]->texture);
assert(tex && tex->buf && "cbuf is marked, but NULL!");
- r300->rws->cs_add_reloc(r300->cs, tex->cs_buf, 0,
+ r300->rws->cs_add_reloc(r300->cs, tex->cs_buf,
+ RADEON_USAGE_READWRITE,
r300_surface(fb->cbufs[i])->domain);
}
/* ...depth buffer... */
if (fb->zsbuf) {
tex = r300_resource(fb->zsbuf->texture);
assert(tex && tex->buf && "zsbuf is marked, but NULL!");
- r300->rws->cs_add_reloc(r300->cs, tex->cs_buf, 0,
+ r300->rws->cs_add_reloc(r300->cs, tex->cs_buf,
+ RADEON_USAGE_READWRITE,
r300_surface(fb->zsbuf)->domain);
}
}
+ /* The AA resolve buffer. */
+ if (r300->aa_state.dirty) {
+ if (aa->dest) {
+ r300->rws->cs_add_reloc(r300->cs, aa->dest->cs_buf,
+ RADEON_USAGE_WRITE,
+ aa->dest->domain);
+ }
+ }
if (r300->textures_state.dirty) {
/* ...textures... */
for (i = 0; i < texstate->count; i++) {
}
tex = r300_resource(texstate->sampler_views[i]->base.texture);
- r300->rws->cs_add_reloc(r300->cs, tex->cs_buf, tex->domain, 0);
+ r300->rws->cs_add_reloc(r300->cs, tex->cs_buf, RADEON_USAGE_READ,
+ tex->domain);
}
}
/* ...occlusion query buffer... */
if (r300->query_current)
r300->rws->cs_add_reloc(r300->cs, r300->query_current->cs_buf,
- 0, r300->query_current->domain);
+ RADEON_USAGE_WRITE, RADEON_DOMAIN_GTT);
/* ...vertex buffer for SWTCL path... */
- if (r300->vbo)
- r300->rws->cs_add_reloc(r300->cs, r300_resource(r300->vbo)->cs_buf,
- r300_resource(r300->vbo)->domain, 0);
+ if (r300->vbo_cs)
+ r300->rws->cs_add_reloc(r300->cs, r300->vbo_cs,
+ RADEON_USAGE_READ, RADEON_DOMAIN_GTT);
/* ...vertex buffers for HWTCL path... */
if (do_validate_vertex_buffers && r300->vertex_arrays_dirty) {
- struct pipe_resource **buf = r300->vbuf_mgr->real_vertex_buffer;
- struct pipe_resource **last = r300->vbuf_mgr->real_vertex_buffer +
- r300->vbuf_mgr->nr_real_vertex_buffers;
- for (; buf != last; buf++) {
- if (!*buf)
+ struct pipe_vertex_buffer *vbuf = r300->vertex_buffer;
+ struct pipe_vertex_buffer *last = r300->vertex_buffer +
+ r300->nr_vertex_buffers;
+ struct pipe_resource *buf;
+
+ for (; vbuf != last; vbuf++) {
+ buf = vbuf->buffer;
+ if (!buf)
continue;
- r300->rws->cs_add_reloc(r300->cs, r300_resource(*buf)->cs_buf,
- r300_resource(*buf)->domain, 0);
+ r300->rws->cs_add_reloc(r300->cs, r300_resource(buf)->cs_buf,
+ RADEON_USAGE_READ,
+ r300_resource(buf)->domain);
}
}
/* ...and index buffer for HWTCL path. */
if (index_buffer)
r300->rws->cs_add_reloc(r300->cs, r300_resource(index_buffer)->cs_buf,
- r300_resource(index_buffer)->domain, 0);
+ RADEON_USAGE_READ,
+ r300_resource(index_buffer)->domain);
/* Now do the validation (flush is called inside cs_validate on failure). */
if (!r300->rws->cs_validate(r300->cs)) {
dwords += 26; /* emit_query_end */
dwords += r300->hyperz_state.size + 2; /* emit_hyperz_end + zcache flush */
if (r300->screen->caps.is_r500)
- dwords += 2;
+ dwords += 2; /* emit_index_bias */
+ if (r300->screen->info.drm_minor >= 6)
+ dwords += 3; /* MSPOS */
return dwords;
}