diff options
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_vs_emit.c | 114 |
1 files changed, 68 insertions, 46 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_vs_emit.c b/src/mesa/drivers/dri/i965/brw_vs_emit.c index c307ddcfd3..7a252dde6c 100644 --- a/src/mesa/drivers/dri/i965/brw_vs_emit.c +++ b/src/mesa/drivers/dri/i965/brw_vs_emit.c @@ -764,22 +764,15 @@ get_constant(struct brw_vs_compile *c, { const struct prog_src_register *src = &inst->SrcReg[argIndex]; struct brw_compile *p = &c->func; - struct brw_reg const_reg; - struct brw_reg const2_reg; - const GLboolean relAddr = src->RelAddr; + struct brw_reg const_reg = c->current_const[argIndex].reg; assert(argIndex < 3); - if (c->current_const[argIndex].index != src->Index || relAddr) { + if (c->current_const[argIndex].index != src->Index) { struct brw_reg addrReg = c->regs[PROGRAM_ADDRESS][0]; - /* If using a non-relative-addressed constant, then keep track of it for - * later use without reloading. - */ - if (relAddr) - c->current_const[argIndex].index = -1; - else - c->current_const[argIndex].index = src->Index; + /* Keep track of the last constant loaded in this slot, for reuse. */ + c->current_const[argIndex].index = src->Index; #if 0 printf(" fetch const[%d] for arg %d into reg %d\n", @@ -787,48 +780,74 @@ get_constant(struct brw_vs_compile *c, #endif /* need to fetch the constant now */ brw_dp_READ_4_vs(p, - c->current_const[argIndex].reg,/* writeback dest */ + const_reg, /* writeback dest */ 0, /* oword */ - relAddr, /* relative indexing? */ + 0, /* relative indexing? */ addrReg, /* address register */ 16 * src->Index, /* byte offset */ SURF_INDEX_VERT_CONST_BUFFER /* binding table index */ ); - - if (relAddr) { - /* second read */ - const2_reg = get_tmp(c); - - /* use upper half of address reg for second read */ - addrReg = stride(addrReg, 0, 4, 0); - addrReg.subnr = 16; - - brw_dp_READ_4_vs(p, - const2_reg, /* writeback dest */ - 1, /* oword */ - relAddr, /* relative indexing? */ - addrReg, /* address register */ - 16 * src->Index, /* byte offset */ - SURF_INDEX_VERT_CONST_BUFFER - ); - } } - const_reg = c->current_const[argIndex].reg; + /* replicate lower four floats into upper half (to get XYZWXYZW) */ + const_reg = stride(const_reg, 0, 4, 0); + const_reg.subnr = 0; - if (relAddr) { - /* merge the two Owords into the constant register */ - /* const_reg[7..4] = const2_reg[7..4] */ - brw_MOV(p, - suboffset(stride(const_reg, 0, 4, 1), 4), - suboffset(stride(const2_reg, 0, 4, 1), 4)); - release_tmp(c, const2_reg); - } - else { - /* replicate lower four floats into upper half (to get XYZWXYZW) */ - const_reg = stride(const_reg, 0, 4, 0); - const_reg.subnr = 0; - } + return const_reg; +} + +static struct brw_reg +get_reladdr_constant(struct brw_vs_compile *c, + const struct prog_instruction *inst, + GLuint argIndex) +{ + const struct prog_src_register *src = &inst->SrcReg[argIndex]; + struct brw_compile *p = &c->func; + struct brw_reg const_reg = c->current_const[argIndex].reg; + struct brw_reg const2_reg; + struct brw_reg addrReg = c->regs[PROGRAM_ADDRESS][0]; + + assert(argIndex < 3); + + /* Can't reuse a reladdr constant load. */ + c->current_const[argIndex].index = -1; + + #if 0 + printf(" fetch const[a0.x+%d] for arg %d into reg %d\n", + src->Index, argIndex, c->current_const[argIndex].reg.nr); +#endif + + /* fetch the first vec4 */ + brw_dp_READ_4_vs(p, + const_reg, /* writeback dest */ + 0, /* oword */ + 1, /* relative indexing? */ + addrReg, /* address register */ + 16 * src->Index, /* byte offset */ + SURF_INDEX_VERT_CONST_BUFFER /* binding table index */ + ); + /* second vec4 */ + const2_reg = get_tmp(c); + + /* use upper half of address reg for second read */ + addrReg = stride(addrReg, 0, 4, 0); + addrReg.subnr = 16; + + brw_dp_READ_4_vs(p, + const2_reg, /* writeback dest */ + 1, /* oword */ + 1, /* relative indexing? */ + addrReg, /* address register */ + 16 * src->Index, /* byte offset */ + SURF_INDEX_VERT_CONST_BUFFER + ); + + /* merge the two Owords into the constant register */ + /* const_reg[7..4] = const2_reg[7..4] */ + brw_MOV(p, + suboffset(stride(const_reg, 0, 4, 1), 4), + suboffset(stride(const2_reg, 0, 4, 1), 4)); + release_tmp(c, const2_reg); return const_reg; } @@ -936,7 +955,10 @@ get_src_reg( struct brw_vs_compile *c, case PROGRAM_ENV_PARAM: case PROGRAM_LOCAL_PARAM: if (c->vp->use_const_buffer) { - return get_constant(c, inst, argIndex); + if (relAddr) + return get_reladdr_constant(c, inst, argIndex); + else + return get_constant(c, inst, argIndex); } else if (relAddr) { return deref(c, c->regs[PROGRAM_STATE_VAR][0], index); |