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pan/mdg: Implement i/umul_high

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As imul with a .hi modifier, which implies a 64-bit computation.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6516>
This commit is contained in:
Alyssa Rosenzweig 2020-08-27 14:35:23 -04:00
parent fd41dece39
commit 3e2cb21e53
2 changed files with 15 additions and 1 deletions
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13
src/panfrost/midgard/midgard_compile.c
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@ -881,6 +881,8 @@ emit_alu(compiler_context *ctx, nir_alu_instr *instr)
ALU_CASE(iadd, iadd);
ALU_CASE(isub, isub);
ALU_CASE(imul, imul);
ALU_CASE(imul_high, imul);
ALU_CASE(umul_high, imul);
/* Zero shoved as second-arg */
ALU_CASE(iabs, iabsdiff);
@ -1059,7 +1061,9 @@ emit_alu(compiler_context *ctx, nir_alu_instr *instr)
unsigned outmod = 0;
bool is_int = midgard_is_integer_op(op);
if (midgard_is_integer_out_op(op)) {
if (instr->op == nir_op_umul_high || instr->op == nir_op_imul_high) {
outmod = midgard_outmod_int_high;
} else if (midgard_is_integer_out_op(op)) {
outmod = midgard_outmod_int_wrap;
} else if (instr->op == nir_op_fsat) {
outmod = midgard_outmod_sat;
@ -2392,6 +2396,13 @@ max_bitsize_for_alu(midgard_instruction *ins)
break;
}
/* High implies computing at a higher bitsize, e.g umul_high of 32-bit
* requires computing at 64-bit */
if (midgard_is_integer_out_op(ins->op) && ins->outmod == midgard_outmod_int_high) {
max_bitsize *= 2;
assert(max_bitsize <= 64);
}
return max_bitsize;
}

3
src/panfrost/midgard/midgard_schedule.c
View file

@ -212,6 +212,9 @@ mir_is_scalar(midgard_instruction *ains)
if (ains->src[1] != ~0)
could_scalar &= (sz1 == 16) || (sz1 == 32);
if (midgard_is_integer_out_op(ains->op) && ains->outmod != midgard_outmod_int_wrap)
return false;
return could_scalar;
}