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pan/bi: Add FMA16 packing

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It's like the original FMA packing but with swizzles introduced.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4382>
This commit is contained in:
Alyssa Rosenzweig 2020-03-27 15:53:57 -04:00 • committed by Marge Bot
parent b5148b6b49
commit 158f2452f2
1 changed files with 51 additions and 12 deletions
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63
src/panfrost/bifrost/bi_pack.c
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@ -421,25 +421,64 @@ bi_get_src(bi_instruction *ins, struct bi_registers *regs, unsigned s, bool is_f
unreachable("Unknown src");
}
/* Constructs a packed 2-bit swizzle for a 16-bit vec2 source. Source must be
* 16-bit and written components must correspond to valid swizzles (component x
* or y). */
static unsigned
bi_swiz16(bi_instruction *ins, unsigned src)
{
assert(nir_alu_type_get_type_size(ins->src_types[src]) == 16);
unsigned swizzle = 0;
for (unsigned c = 0; c < 2; ++c) {
if (!bi_writes_component(ins, src)) continue;
unsigned k = ins->swizzle[src][c];
assert(k < 1);
swizzle |= (k << c);
}
return swizzle;
}
static unsigned
bi_pack_fma_fma(bi_instruction *ins, struct bi_registers *regs)
{
/* (-a)(-b) = ab, so we only need one negate bit */
bool negate_mul = ins->src_neg[0] ^ ins->src_neg[1];
struct bifrost_fma_fma pack = {
.src0 = bi_get_src(ins, regs, 0, true),
.src1 = bi_get_src(ins, regs, 1, true),
.src2 = bi_get_src(ins, regs, 2, true),
.src0_abs = ins->src_abs[0],
.src1_abs = ins->src_abs[1],
.src2_abs = ins->src_abs[2],
.src0_neg = negate_mul,
.src2_neg = ins->src_neg[2],
.op = BIFROST_FMA_OP_FMA
};
if (ins->dest_type == nir_type_float32) {
struct bifrost_fma_fma pack = {
.src0 = bi_get_src(ins, regs, 0, true),
.src1 = bi_get_src(ins, regs, 1, true),
.src2 = bi_get_src(ins, regs, 2, true),
.src0_abs = ins->src_abs[0],
.src1_abs = ins->src_abs[1],
.src2_abs = ins->src_abs[2],
.src0_neg = negate_mul,
.src2_neg = ins->src_neg[2],
.op = BIFROST_FMA_OP_FMA
};
RETURN_PACKED(pack);
RETURN_PACKED(pack);
} else if (ins->dest_type == nir_type_float16) {
struct bifrost_fma_fma16 pack = {
.src0 = bi_get_src(ins, regs, 0, true),
.src1 = bi_get_src(ins, regs, 1, true),
.src2 = bi_get_src(ins, regs, 2, true),
.swizzle_0 = bi_swiz16(ins, 0),
.swizzle_1 = bi_swiz16(ins, 1),
.swizzle_2 = bi_swiz16(ins, 2),
.src0_neg = negate_mul,
.src2_neg = ins->src_neg[2],
.op = BIFROST_FMA_OP_FMA16
};
RETURN_PACKED(pack);
} else {
unreachable("Invalid fma dest type");
}
}
static unsigned