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i965: Add support for VS relative addressing of temporary arrays.

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Fixes glsl-vs-arrays.  Bug #27388.
This commit is contained in:
Eric Anholt
2010-07-23 10:34:29 -07:00
parent 41e7347a17
commit 35bbbf4742
1 changed files with 49 additions and 2 deletions
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51
src/mesa/drivers/dri/i965/brw_vs_emit.c
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@@ -1000,6 +1000,36 @@ static struct brw_reg deref( struct brw_vs_compile *c,
return tmp;
}
static void
move_to_reladdr_dst(struct brw_vs_compile *c,
const struct prog_instruction *inst,
struct brw_reg val)
{
struct brw_compile *p = &c->func;
int reg_size = 32;
struct brw_reg addr_reg = c->regs[PROGRAM_ADDRESS][0];
struct brw_reg vp_address = retype(vec1(addr_reg), BRW_REGISTER_TYPE_D);
struct brw_reg temp_base = c->regs[inst->DstReg.File][0];
GLuint byte_offset = temp_base.nr * 32 + temp_base.subnr;
struct brw_reg indirect = brw_vec4_indirect(0,0);
struct brw_reg acc = retype(vec1(get_tmp(c)), BRW_REGISTER_TYPE_UW);
byte_offset += inst->DstReg.Index * reg_size;
brw_push_insn_state(p);
brw_set_access_mode(p, BRW_ALIGN_1);
brw_MUL(p, acc, vp_address, brw_imm_uw(reg_size));
brw_ADD(p, brw_address_reg(0), acc, brw_imm_uw(byte_offset));
brw_MOV(p, indirect, val);
brw_MUL(p, acc, suboffset(vp_address, 4), brw_imm_uw(reg_size));
brw_ADD(p, brw_address_reg(0), acc,
brw_imm_uw(byte_offset + reg_size / 2));
brw_MOV(p, indirect, suboffset(val, 4));
brw_pop_insn_state(p);
}
/**
* Get brw reg corresponding to the instruction's [argIndex] src reg.
@@ -1155,8 +1185,17 @@ static struct brw_reg get_dst( struct brw_vs_compile *c,
switch (dst.File) {
case PROGRAM_TEMPORARY:
case PROGRAM_OUTPUT:
assert(c->regs[dst.File][dst.Index].nr != 0);
reg = c->regs[dst.File][dst.Index];
/* register-indirect addressing is only 1x1, not VxH, for
* destination regs. So, for RelAddr we'll return a temporary
* for the dest and do a move of the result to the RelAddr
* register after the instruction emit.
*/
if (dst.RelAddr) {
reg = get_tmp(c);
} else {
assert(c->regs[dst.File][dst.Index].nr != 0);
reg = c->regs[dst.File][dst.Index];
}
break;
case PROGRAM_ADDRESS:
assert(dst.Index == 0);
@@ -1843,6 +1882,14 @@ void brw_vs_emit(struct brw_vs_compile *c )
}
}
if (inst->DstReg.RelAddr && inst->DstReg.File == PROGRAM_TEMPORARY) {
/* We don't do RelAddr of PROGRAM_OUTPUT yet, because of the
* compute-to-mrf and the fact that we are allocating
* registers for only the used PROGRAM_OUTPUTs.
*/
move_to_reladdr_dst(c, inst, dst);
}
release_tmps(c);
}