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-rw-r--r--src/mesa/drivers/dri/i965/brw_vs_emit.c74
1 files changed, 49 insertions, 25 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c
index 4e3338293b5..e0be3cc6e31 100644
--- a/src/mesa/drivers/dri/i965/brw_vs_emit.c
+++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c
@@ -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 */