AlexIndustrial/mesa
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

i965: Fix up the VUE handling for SNB, and hopefully clarify comments.

Browse Source
This commit is contained in:
Eric Anholt
2010-02-25 17:58:04 -08:00
parent 54ea39f768
commit c8e5100a39
1 changed files with 48 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/mesa/drivers/dri/i965/brw_vs_emit.c
+48 -24
View File
@@ -180,10 +180,12 @@ static void brw_vs_alloc_regs( struct brw_vs_compile *c )
c->first_output = reg;
c->first_overflow_output = 0;
if (intel->is_ironlake)
mrf = 8;
if (intel->gen >= 6)
mrf = 6;
else if (intel->is_ironlake)
mrf = 8;
else
mrf = 4;
mrf = 4;
for (i = 0; i < VERT_RESULT_MAX; i++) {
if (c->prog_data.outputs_written & BITFIELD64_BIT(i)) {
@@ -1195,7 +1197,7 @@ static void emit_vertex_write( struct brw_vs_compile *c)
struct brw_reg pos = c->regs[PROGRAM_OUTPUT][VERT_RESULT_HPOS];
struct brw_reg ndc;
int eot;
GLuint len_vertext_header = 2;
GLuint len_vertex_header = 2;
if (c->key.copy_edgeflag) {
brw_MOV(p,
@@ -1203,12 +1205,14 @@ static void emit_vertex_write( struct brw_vs_compile *c)
get_reg(c, PROGRAM_INPUT, VERT_ATTRIB_EDGEFLAG));
}
/* Build ndc coords */
ndc = get_tmp(c);
/* ndc = 1.0 / pos.w */
emit_math1(c, BRW_MATH_FUNCTION_INV, ndc, brw_swizzle1(pos, 3), BRW_MATH_PRECISION_FULL);
/* ndc.xyz = pos * ndc */
brw_MUL(p, brw_writemask(ndc, WRITEMASK_XYZ), pos, ndc);
if (intel->gen < 6) {
/* Build ndc coords */
ndc = get_tmp(c);
/* ndc = 1.0 / pos.w */
emit_math1(c, BRW_MATH_FUNCTION_INV, ndc, brw_swizzle1(pos, 3), BRW_MATH_PRECISION_FULL);
/* ndc.xyz = pos * ndc */
brw_MUL(p, brw_writemask(ndc, WRITEMASK_XYZ), pos, ndc);
}
/* Update the header for point size, user clipping flags, and -ve rhw
* workaround.
@@ -1271,21 +1275,41 @@ static void emit_vertex_write( struct brw_vs_compile *c)
* of zeros followed by two sets of NDC coordinates:
*/
brw_set_access_mode(p, BRW_ALIGN_1);
brw_MOV(p, offset(m0, 2), ndc);
if (intel->is_ironlake || intel->gen >= 6) {
/* There are 20 DWs (D0-D19) in VUE vertex header on Ironlake */
brw_MOV(p, offset(m0, 3), pos); /* a portion of vertex header */
/* m4, m5 contain the distances from vertex to the user clip planeXXX.
* Seems it is useless for us.
* m6 is used for aligning, so that the remainder of vertex element is
* reg-aligned.
*/
brw_MOV(p, offset(m0, 7), pos); /* the remainder of vertex element */
len_vertext_header = 6;
if (intel->gen >= 6) {
/* There are 16 DWs (D0-D15) in VUE header on Sandybridge:
* dword 0-3 (m1) of the header is indices, point width, clip flags.
* dword 4-7 (m2) is the 4D space position
* dword 8-15 (m3,m4) of the vertex header is the user clip distance.
* m5 is the first vertex data we fill, which is the vertex position.
*/
brw_MOV(p, offset(m0, 2), pos);
brw_MOV(p, offset(m0, 5), pos);
len_vertex_header = 4;
} else if (intel->is_ironlake) {
/* There are 20 DWs (D0-D19) in VUE header on Ironlake:
* dword 0-3 (m1) of the header is indices, point width, clip flags.
* dword 4-7 (m2) is the ndc position (set above)
* dword 8-11 (m3) of the vertex header is the 4D space position
* dword 12-19 (m4,m5) of the vertex header is the user clip distance.
* m6 is a pad so that the vertex element data is aligned
* m7 is the first vertex data we fill, which is the vertex position.
*/
brw_MOV(p, offset(m0, 2), ndc);
brw_MOV(p, offset(m0, 3), pos);
brw_MOV(p, offset(m0, 7), pos);
len_vertex_header = 6;
} else {
brw_MOV(p, offset(m0, 3), pos);
len_vertext_header = 2;
/* There are 8 dwords in VUE header pre-Ironlake:
* dword 0-3 (m1) is indices, point width, clip flags.
* dword 4-7 (m2) is ndc position (set above)
*
* dword 8-11 (m3) is the first vertex data, which we always have be the
* vertex position.
*/
brw_MOV(p, offset(m0, 2), ndc);
brw_MOV(p, offset(m0, 3), pos);
len_vertex_header = 2;
}
eot = (c->first_overflow_output == 0);
@@ -1296,7 +1320,7 @@ static void emit_vertex_write( struct brw_vs_compile *c)
c->r0, /* src */
0, /* allocate */
1, /* used */
MIN2(c->nr_outputs + 1 + len_vertext_header, (BRW_MAX_MRF-1)), /* msg len */
MIN2(c->nr_outputs + 1 + len_vertex_header, (BRW_MAX_MRF-1)), /* msg len */
0, /* response len */
eot, /* eot */
eot, /* writes complete */