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| author | Ilia Mirkin <imirkin@alum.mit.edu> | 2014-09-28 22:00:34 -0400 |
|---|---|---|
| committer | Emil Velikov <emil.l.velikov@gmail.com> | 2014-10-29 17:44:21 +0000 |
| commit | 3b1a59259ba470bf78abfddd681269c0c552e646 (patch) | |
| tree | 97f60a4a643eac5f82c845c8eab005abd01a0efa /src | |
| parent | 74a92b1f34c9b6b368b25016c08fa23b59cd9ea0 (diff) | |
freedreno/ir3: add ISSG support
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
(cherry picked from commit 347bc197a6f245c1ac3954acfefd15995f34d0f5)
Diffstat (limited to 'src')
| -rw-r--r-- | src/gallium/drivers/freedreno/ir3/ir3_compiler.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/gallium/drivers/freedreno/ir3/ir3_compiler.c b/src/gallium/drivers/freedreno/ir3/ir3_compiler.c index 4250401e7e5..83c687f266f 100644 --- a/src/gallium/drivers/freedreno/ir3/ir3_compiler.c +++ b/src/gallium/drivers/freedreno/ir3/ir3_compiler.c @@ -1589,6 +1589,44 @@ trans_ucmp(const struct instr_translater *t, put_dst(ctx, inst, dst); } +/* + * ISSG(a) = a < 0 ? -1 : a > 0 ? 1 : 0 + * cmps.s.lt tmp_neg, a, 0 # 1 if a is negative + * cmps.s.gt tmp_pos, a, 0 # 1 if a is positive + * sub.u dst, tmp_pos, tmp_neg + */ +static void +trans_issg(const struct instr_translater *t, + struct ir3_compile_context *ctx, + struct tgsi_full_instruction *inst) +{ + struct ir3_instruction *instr; + struct tgsi_dst_register *dst = get_dst(ctx, inst); + struct tgsi_src_register *a = &inst->Src[0].Register; + struct tgsi_dst_register neg_dst, pos_dst; + struct tgsi_src_register *neg_src, *pos_src; + + neg_src = get_internal_temp(ctx, &neg_dst); + pos_src = get_internal_temp(ctx, &pos_dst); + + /* cmps.s.lt neg, a, 0 */ + instr = instr_create(ctx, 2, OPC_CMPS_S); + instr->cat2.condition = IR3_COND_LT; + vectorize(ctx, instr, &neg_dst, 2, a, 0, 0, IR3_REG_IMMED); + + /* cmps.s.gt pos, a, 0 */ + instr = instr_create(ctx, 2, OPC_CMPS_S); + instr->cat2.condition = IR3_COND_GT; + vectorize(ctx, instr, &pos_dst, 2, a, 0, 0, IR3_REG_IMMED); + + /* sub.u dst, pos, neg */ + instr = instr_create(ctx, 2, OPC_SUB_U); + vectorize(ctx, instr, dst, 2, pos_src, 0, neg_src, 0); + + put_dst(ctx, inst, dst); +} + + /* * Conditional / Flow control @@ -2416,6 +2454,7 @@ static const struct instr_translater translaters[TGSI_OPCODE_LAST] = { INSTR(ISLT, trans_icmp, .opc = OPC_CMPS_S), INSTR(USLT, trans_icmp, .opc = OPC_CMPS_U), INSTR(UCMP, trans_ucmp), + INSTR(ISSG, trans_issg), INSTR(IF, trans_if, .opc = OPC_CMPS_F), INSTR(UIF, trans_if, .opc = OPC_CMPS_U), INSTR(ELSE, trans_else), |