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pan/bi: Pack register fields

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Now that we have ctrl, the rest is natural... sorta.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4242>
This commit is contained in:
Alyssa Rosenzweig 2020-03-17 22:17:39 -04:00 • committed by Marge Bot
parent 03a271bf15
commit 9080ea8b57
1 changed files with 53 additions and 4 deletions
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57
src/panfrost/bifrost/bi_pack.c
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@ -106,11 +106,52 @@ bi_pack_register_ctrl(struct bi_registers r)
return ctrl;
}
static unsigned
static uint64_t
bi_pack_registers(struct bi_registers regs)
{
/* TODO */
return 0;
enum bifrost_reg_control ctrl = bi_pack_register_ctrl(regs);
struct bifrost_regs s;
uint64_t packed = 0;
if (regs.enabled[1]) {
/* Gotta save that bit!~ Required by the 63-x trick */
assert(regs.port[1] > regs.port[0]);
assert(regs.enabled[0]);
/* Do the 63-x trick, see docs/disasm */
if (regs.port[0] > 31) {
regs.port[0] = 63 - regs.port[0];
regs.port[1] = 63 - regs.port[1];
}
assert(regs.port[0] <= 31);
assert(regs.port[1] <= 63);
s.ctrl = ctrl;
s.reg1 = regs.port[1];
s.reg0 = regs.port[0];
} else {
/* Port 1 disabled, so set to zero and use port 1 for ctrl */
s.reg1 = ctrl << 2;
if (regs.enabled[0]) {
/* Bit 0 upper bit of port 0 */
s.reg1 |= (regs.port[0] >> 5);
/* Rest of port 0 in usual spot */
s.reg0 = (regs.port[0] & 0b11111);
} else {
/* Bit 1 set if port 0 also disabled */
s.reg1 |= (1 << 1);
}
}
s.reg3 = regs.port[3];
s.reg2 = regs.port[2];
s.uniform_const = regs.uniform_constant;
memcpy(&packed, &s, sizeof(s));
return packed;
}
static unsigned
@ -135,7 +176,15 @@ struct bi_packed_bundle {
static struct bi_packed_bundle
bi_pack_bundle(bi_clause *clause, bi_bundle bundle)
{
unsigned reg = /*bi_pack_registers(clause, bundle)*/0;
struct bi_registers regs = {
.enabled = { true, true },
.port = { 34, 35, 3, 4 },
.write_fma = true,
.write_add = true,
.first_instruction = true,
};
uint64_t reg = bi_pack_registers(regs);
uint64_t fma = bi_pack_fma(clause, bundle);
uint64_t add = bi_pack_add(clause, bundle);