diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs.h | 1 | ||||
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs_emit.c | 52 |
2 files changed, 49 insertions, 4 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs.h b/src/mesa/drivers/dri/i965/brw_vs.h index 1e4f66091e..4a591365c9 100644 --- a/src/mesa/drivers/dri/i965/brw_vs.h +++ b/src/mesa/drivers/dri/i965/brw_vs.h @@ -58,6 +58,7 @@ struct brw_vs_compile { GLuint first_output; GLuint nr_outputs; + GLuint first_overflow_output; /**< VERT_ATTRIB_x */ GLuint first_tmp; GLuint last_tmp; diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c index 01364232a4..9467295d34 100644 --- a/src/mesa/drivers/dri/i965/brw_vs_emit.c +++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c @@ -133,6 +133,7 @@ static void brw_vs_alloc_regs( struct brw_vs_compile *c ) */ c->nr_outputs = 0; c->first_output = reg; + c->first_overflow_output = 0; mrf = 4; for (i = 0; i < VERT_RESULT_MAX; i++) { if (c->prog_data.outputs_written & (1 << i)) { @@ -148,8 +149,17 @@ static void brw_vs_alloc_regs( struct brw_vs_compile *c ) mrf++; /* just a placeholder? XXX fix later stages & remove this */ } else { - c->regs[PROGRAM_OUTPUT][i] = brw_message_reg(mrf); - mrf++; + if (mrf < 16) { + c->regs[PROGRAM_OUTPUT][i] = brw_message_reg(mrf); + mrf++; + } + else { + /* too many vertex results to fit in MRF, use GRF for overflow */ + if (!c->first_overflow_output) + c->first_overflow_output = i; + c->regs[PROGRAM_OUTPUT][i] = brw_vec8_grf(reg, 0); + reg++; + } } } } @@ -1067,6 +1077,7 @@ static void emit_vertex_write( struct brw_vs_compile *c) struct brw_reg m0 = brw_message_reg(0); struct brw_reg pos = c->regs[PROGRAM_OUTPUT][VERT_RESULT_HPOS]; struct brw_reg ndc; + int eot; if (c->key.copy_edgeflag) { brw_MOV(p, @@ -1145,18 +1156,51 @@ static void emit_vertex_write( struct brw_vs_compile *c) brw_MOV(p, offset(m0, 2), ndc); brw_MOV(p, offset(m0, 3), pos); + eot = (c->first_overflow_output == 0); + brw_urb_WRITE(p, brw_null_reg(), /* dest */ 0, /* starting mrf reg nr */ c->r0, /* src */ 0, /* allocate */ 1, /* used */ - c->nr_outputs + 3, /* msg len */ + MIN2(c->nr_outputs + 3, (BRW_MAX_MRF-1)), /* msg len */ 0, /* response len */ - 1, /* eot */ + eot, /* eot */ 1, /* writes complete */ 0, /* urb destination offset */ BRW_URB_SWIZZLE_INTERLEAVE); + + if (c->first_overflow_output > 0) { + /* Not all of the vertex outputs/results fit into the MRF. + * Move the overflowed attributes from the GRF to the MRF and + * issue another brw_urb_WRITE(). + */ + /* XXX I'm not 100% sure about which MRF regs to use here. Starting + * at mrf[4] atm... + */ + GLuint i, mrf = 0; + for (i = c->first_overflow_output; i < VERT_RESULT_MAX; i++) { + if (c->prog_data.outputs_written & (1 << i)) { + /* move from GRF to MRF */ + brw_MOV(p, brw_message_reg(4+mrf), c->regs[PROGRAM_OUTPUT][i]); + mrf++; + } + } + + brw_urb_WRITE(p, + brw_null_reg(), /* dest */ + 4, /* starting mrf reg nr */ + c->r0, /* src */ + 0, /* allocate */ + 1, /* used */ + mrf+1, /* msg len */ + 0, /* response len */ + 1, /* eot */ + 1, /* writes complete */ + BRW_MAX_MRF-1, /* urb destination offset */ + BRW_URB_SWIZZLE_INTERLEAVE); + } } |