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skia2/tests/SkVMTest.cpp
Mike Klein 279ca2e10c don't dedup loads or stores 
We've been assuming that all Ops with the same arguments produce the
same value and deduplicating them, which results in a simple common
subexpression eliminator.

But we can't soundly dedup two identical loads with a store between;
that store could change the memory those loads read, producing different
values, as demonstrated by the first new unit test.

Then, by similar reasoning, it may first seem fine to deduplicate
stores, e.g.

   store32 arg(0), v1
   store32 arg(0), v1

That second store certainly does look redundant.  But if we slot a
different store between, it's no longer redundant:

   store32 arg(0), v1
   store32 arg(0), v2
   store32 arg(0), v1

If we dedup those two v1 stores, we'll skip the second and be left with
v2 in our buffer instead of v1.  This is the second new unit test.

Now, uniform32 and gather ops also touch memory... are they safe to
dedup?  Surprisingly, yes!  Uniforms are easy: they're read-only.  No
way to store to uniforms, so no intervening store can invalidate them.

Gathers are a little fuzzier, in that the buffer we gather from is
uniform in practice, but not strictly required to be... it's not
impossible to construct a program that gathers from a buffer that the
program also stores to, but you'd have to go out of your way to do it,
and it's not a pattern we use today, and SkVM does not provide the
synchronization primitives you'd need to make attempting that even
vaguely sensible.  So gathers in practice can also be deduplicated.

In general it's safe to dedup an operation unless it touches _varying
memory_, i.e.  loads and stores.  uniform32 and gathers touch
non-varying memory, so they're safe, and while index is varying, it
doesn't touch memory.

Change-Id: Ia275f0ab2708d3f71e783164b419436b90f103a9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/350608
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2021-01-06 21:17:10 +00:00

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/*
* Copyright 2019 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkColorPriv.h"
#include "include/private/SkColorData.h"
#include "src/core/SkCpu.h"
#include "src/core/SkMSAN.h"
#include "src/core/SkVM.h"
#include "tests/Test.h"
template <typename Fn>
static void test_jit_and_interpreter(skvm::Program&& program, Fn&& test) {
if (program.hasJIT()) {
test((const skvm::Program&) program);
program.dropJIT();
}
test((const skvm::Program&) program);
}
DEF_TEST(SkVM_eliminate_dead_code, r) {
skvm::Builder b;
{
skvm::Arg arg = b.varying<int>();
skvm::I32 l = b.load32(arg);
skvm::I32 a = b.add(l, l);
b.add(a, b.splat(7));
}
std::vector<skvm::Instruction> program = b.program();
REPORTER_ASSERT(r, program.size() == 4);
program = skvm::eliminate_dead_code(program);
REPORTER_ASSERT(r, program.size() == 0);
}
DEF_TEST(SkVM_Pointless, r) {
// Let's build a program with no memory arguments.
// It should all be pegged as dead code, but we should be able to "run" it.
skvm::Builder b;
{
b.add(b.splat(5.0f),
b.splat(4.0f));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
for (int N = 0; N < 64; N++) {
program.eval(N);
}
});
for (const skvm::OptimizedInstruction& inst : b.optimize()) {
REPORTER_ASSERT(r, inst.death == 0 && inst.can_hoist == true);
}
}
DEF_TEST(SkVM_memset, r) {
skvm::Builder b;
b.store32(b.varying<int>(), b.splat(42));
test_jit_and_interpreter(b.done(), [&](const skvm::Program& p) {
int buf[18];
buf[17] = 47;
p.eval(17, buf);
for (int i = 0; i < 17; i++) {
REPORTER_ASSERT(r, buf[i] == 42);
}
REPORTER_ASSERT(r, buf[17] == 47);
});
}
DEF_TEST(SkVM_memcpy, r) {
skvm::Builder b;
{
auto src = b.varying<int>(),
dst = b.varying<int>();
b.store32(dst, b.load32(src));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& p) {
int src[] = {1,2,3,4,5,6,7,8,9},
dst[] = {0,0,0,0,0,0,0,0,0};
p.eval(SK_ARRAY_COUNT(src)-1, src, dst);
for (size_t i = 0; i < SK_ARRAY_COUNT(src)-1; i++) {
REPORTER_ASSERT(r, dst[i] == src[i]);
}
size_t i = SK_ARRAY_COUNT(src)-1;
REPORTER_ASSERT(r, dst[i] == 0);
});
}
DEF_TEST(SkVM_LoopCounts, r) {
// Make sure we cover all the exact N we want.
// buf[i] += 1
skvm::Builder b;
skvm::Arg arg = b.varying<int>();
b.store32(arg,
b.add(b.splat(1),
b.load32(arg)));
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
int buf[64];
for (int N = 0; N <= (int)SK_ARRAY_COUNT(buf); N++) {
for (int i = 0; i < (int)SK_ARRAY_COUNT(buf); i++) {
buf[i] = i;
}
program.eval(N, buf);
for (int i = 0; i < N; i++) {
REPORTER_ASSERT(r, buf[i] == i+1);
}
for (int i = N; i < (int)SK_ARRAY_COUNT(buf); i++) {
REPORTER_ASSERT(r, buf[i] == i);
}
}
});
}
DEF_TEST(SkVM_gather32, r) {
skvm::Builder b;
{
skvm::Arg uniforms = b.uniform(),
buf = b.varying<int>();
skvm::I32 x = b.load32(buf);
b.store32(buf, b.gather32(uniforms,0, b.bit_and(x, b.splat(7))));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
const int img[] = {12,34,56,78, 90,98,76,54};
int buf[20];
for (int i = 0; i < 20; i++) {
buf[i] = i;
}
struct Uniforms {
const int* img;
} uniforms{img};
program.eval(20, &uniforms, buf);
int i = 0;
REPORTER_ASSERT(r, buf[i] == 12); i++;
REPORTER_ASSERT(r, buf[i] == 34); i++;
REPORTER_ASSERT(r, buf[i] == 56); i++;
REPORTER_ASSERT(r, buf[i] == 78); i++;
REPORTER_ASSERT(r, buf[i] == 90); i++;
REPORTER_ASSERT(r, buf[i] == 98); i++;
REPORTER_ASSERT(r, buf[i] == 76); i++;
REPORTER_ASSERT(r, buf[i] == 54); i++;
REPORTER_ASSERT(r, buf[i] == 12); i++;
REPORTER_ASSERT(r, buf[i] == 34); i++;
REPORTER_ASSERT(r, buf[i] == 56); i++;
REPORTER_ASSERT(r, buf[i] == 78); i++;
REPORTER_ASSERT(r, buf[i] == 90); i++;
REPORTER_ASSERT(r, buf[i] == 98); i++;
REPORTER_ASSERT(r, buf[i] == 76); i++;
REPORTER_ASSERT(r, buf[i] == 54); i++;
REPORTER_ASSERT(r, buf[i] == 12); i++;
REPORTER_ASSERT(r, buf[i] == 34); i++;
REPORTER_ASSERT(r, buf[i] == 56); i++;
REPORTER_ASSERT(r, buf[i] == 78); i++;
});
}
DEF_TEST(SkVM_gathers, r) {
skvm::Builder b;
{
skvm::Arg uniforms = b.uniform(),
buf32 = b.varying<int>(),
buf16 = b.varying<uint16_t>(),
buf8 = b.varying<uint8_t>();
skvm::I32 x = b.load32(buf32);
b.store32(buf32, b.gather32(uniforms,0, b.bit_and(x, b.splat( 7))));
b.store16(buf16, b.gather16(uniforms,0, b.bit_and(x, b.splat(15))));
b.store8 (buf8 , b.gather8 (uniforms,0, b.bit_and(x, b.splat(31))));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
const int img[] = {12,34,56,78, 90,98,76,54};
constexpr int N = 20;
int buf32[N];
uint16_t buf16[N];
uint8_t buf8 [N];
for (int i = 0; i < 20; i++) {
buf32[i] = i;
}
struct Uniforms {
const int* img;
} uniforms{img};
program.eval(N, &uniforms, buf32, buf16, buf8);
int i = 0;
REPORTER_ASSERT(r, buf32[i] == 12 && buf16[i] == 12 && buf8[i] == 12); i++;
REPORTER_ASSERT(r, buf32[i] == 34 && buf16[i] == 0 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 56 && buf16[i] == 34 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 78 && buf16[i] == 0 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 90 && buf16[i] == 56 && buf8[i] == 34); i++;
REPORTER_ASSERT(r, buf32[i] == 98 && buf16[i] == 0 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 76 && buf16[i] == 78 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 54 && buf16[i] == 0 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 12 && buf16[i] == 90 && buf8[i] == 56); i++;
REPORTER_ASSERT(r, buf32[i] == 34 && buf16[i] == 0 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 56 && buf16[i] == 98 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 78 && buf16[i] == 0 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 90 && buf16[i] == 76 && buf8[i] == 78); i++;
REPORTER_ASSERT(r, buf32[i] == 98 && buf16[i] == 0 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 76 && buf16[i] == 54 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 54 && buf16[i] == 0 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 12 && buf16[i] == 12 && buf8[i] == 90); i++;
REPORTER_ASSERT(r, buf32[i] == 34 && buf16[i] == 0 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 56 && buf16[i] == 34 && buf8[i] == 0); i++;
REPORTER_ASSERT(r, buf32[i] == 78 && buf16[i] == 0 && buf8[i] == 0); i++;
});
}
DEF_TEST(SkVM_gathers2, r) {
skvm::Builder b;
{
skvm::Arg uniforms = b.uniform(),
buf32 = b.varying<int>(),
buf16 = b.varying<uint16_t>(),
buf8 = b.varying<uint8_t>();
skvm::I32 x = b.load32(buf32);
b.store32(buf32, b.gather32(uniforms,0, x));
b.store16(buf16, b.gather16(uniforms,0, x));
b.store8 (buf8 , b.gather8 (uniforms,0, x));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
uint8_t img[256];
for (int i = 0; i < 256; i++) {
img[i] = i;
}
int buf32[64];
uint16_t buf16[64];
uint8_t buf8 [64];
for (int i = 0; i < 64; i++) {
buf32[i] = (i*47)&63;
buf16[i] = 0;
buf8 [i] = 0;
}
struct Uniforms {
const uint8_t* img;
} uniforms{img};
program.eval(64, &uniforms, buf32, buf16, buf8);
for (int i = 0; i < 64; i++) {
REPORTER_ASSERT(r, buf8[i] == ((i*47)&63)); // 0,47,30,13,60,...
}
REPORTER_ASSERT(r, buf16[ 0] == 0x0100);
REPORTER_ASSERT(r, buf16[63] == 0x2322);
REPORTER_ASSERT(r, buf32[ 0] == 0x03020100);
REPORTER_ASSERT(r, buf32[63] == 0x47464544);
});
}
DEF_TEST(SkVM_bitops, r) {
skvm::Builder b;
{
skvm::Arg ptr = b.varying<int>();
skvm::I32 x = b.load32(ptr);
x = b.bit_and (x, b.splat(0xf1)); // 0x40
x = b.bit_or (x, b.splat(0x80)); // 0xc0
x = b.bit_xor (x, b.splat(0xfe)); // 0x3e
x = b.bit_clear(x, b.splat(0x30)); // 0x0e
x = b.shl(x, 28); // 0xe000'0000
x = b.sra(x, 28); // 0xffff'fffe
x = b.shr(x, 1); // 0x7fff'ffff
b.store32(ptr, x);
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
int x = 0x42;
program.eval(1, &x);
REPORTER_ASSERT(r, x == 0x7fff'ffff);
});
}
DEF_TEST(SkVM_select_is_NaN, r) {
skvm::Builder b;
{
skvm::Arg src = b.varying<float>(),
dst = b.varying<float>();
skvm::F32 x = b.loadF(src);
x = select(is_NaN(x), b.splat(0.0f)
, x);
b.storeF(dst, x);
}
std::vector<skvm::OptimizedInstruction> program = b.optimize();
REPORTER_ASSERT(r, program.size() == 4);
REPORTER_ASSERT(r, program[0].op == skvm::Op::load32);
REPORTER_ASSERT(r, program[1].op == skvm::Op::neq_f32);
REPORTER_ASSERT(r, program[2].op == skvm::Op::bit_clear);
REPORTER_ASSERT(r, program[3].op == skvm::Op::store32);
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
// ±NaN, ±0, ±1, ±inf
uint32_t src[] = {0x7f80'0001, 0xff80'0001, 0x0000'0000, 0x8000'0000,
0x3f80'0000, 0xbf80'0000, 0x7f80'0000, 0xff80'0000};
uint32_t dst[SK_ARRAY_COUNT(src)];
program.eval(SK_ARRAY_COUNT(src), src, dst);
for (int i = 0; i < (int)SK_ARRAY_COUNT(src); i++) {
REPORTER_ASSERT(r, dst[i] == (i < 2 ? 0 : src[i]));
}
});
}
DEF_TEST(SkVM_f32, r) {
skvm::Builder b;
{
skvm::Arg arg = b.varying<float>();
skvm::F32 x = b.loadF(arg),
y = b.add(x,x), // y = 2x
z = b.sub(y,x), // z = 2x-x = x
w = b.div(z,x); // w = x/x = 1
b.storeF(arg, w);
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
float buf[] = { 1,2,3,4,5,6,7,8,9 };
program.eval(SK_ARRAY_COUNT(buf), buf);
for (float v : buf) {
REPORTER_ASSERT(r, v == 1.0f);
}
});
}
DEF_TEST(SkVM_cmp_i32, r) {
skvm::Builder b;
{
skvm::I32 x = b.load32(b.varying<int>());
auto to_bit = [&](int shift, skvm::I32 mask) {
return b.shl(b.bit_and(mask, b.splat(0x1)), shift);
};
skvm::I32 m = b.splat(0);
m = b.bit_or(m, to_bit(0, b. eq(x, b.splat(0))));
m = b.bit_or(m, to_bit(1, b.neq(x, b.splat(1))));
m = b.bit_or(m, to_bit(2, b. lt(x, b.splat(2))));
m = b.bit_or(m, to_bit(3, b.lte(x, b.splat(3))));
m = b.bit_or(m, to_bit(4, b. gt(x, b.splat(4))));
m = b.bit_or(m, to_bit(5, b.gte(x, b.splat(5))));
b.store32(b.varying<int>(), m);
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
int in[] = { 0,1,2,3,4,5,6,7,8,9 };
int out[SK_ARRAY_COUNT(in)];
program.eval(SK_ARRAY_COUNT(in), in, out);
REPORTER_ASSERT(r, out[0] == 0b001111);
REPORTER_ASSERT(r, out[1] == 0b001100);
REPORTER_ASSERT(r, out[2] == 0b001010);
REPORTER_ASSERT(r, out[3] == 0b001010);
REPORTER_ASSERT(r, out[4] == 0b000010);
for (int i = 5; i < (int)SK_ARRAY_COUNT(out); i++) {
REPORTER_ASSERT(r, out[i] == 0b110010);
}
});
}
DEF_TEST(SkVM_cmp_f32, r) {
skvm::Builder b;
{
skvm::F32 x = b.loadF(b.varying<float>());
auto to_bit = [&](int shift, skvm::I32 mask) {
return b.shl(b.bit_and(mask, b.splat(0x1)), shift);
};
skvm::I32 m = b.splat(0);
m = b.bit_or(m, to_bit(0, b. eq(x, b.splat(0.0f))));
m = b.bit_or(m, to_bit(1, b.neq(x, b.splat(1.0f))));
m = b.bit_or(m, to_bit(2, b. lt(x, b.splat(2.0f))));
m = b.bit_or(m, to_bit(3, b.lte(x, b.splat(3.0f))));
m = b.bit_or(m, to_bit(4, b. gt(x, b.splat(4.0f))));
m = b.bit_or(m, to_bit(5, b.gte(x, b.splat(5.0f))));
b.store32(b.varying<int>(), m);
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
float in[] = { 0,1,2,3,4,5,6,7,8,9 };
int out[SK_ARRAY_COUNT(in)];
program.eval(SK_ARRAY_COUNT(in), in, out);
REPORTER_ASSERT(r, out[0] == 0b001111);
REPORTER_ASSERT(r, out[1] == 0b001100);
REPORTER_ASSERT(r, out[2] == 0b001010);
REPORTER_ASSERT(r, out[3] == 0b001010);
REPORTER_ASSERT(r, out[4] == 0b000010);
for (int i = 5; i < (int)SK_ARRAY_COUNT(out); i++) {
REPORTER_ASSERT(r, out[i] == 0b110010);
}
});
}
DEF_TEST(SkVM_index, r) {
skvm::Builder b;
b.store32(b.varying<int>(), b.index());
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
int buf[23];
program.eval(SK_ARRAY_COUNT(buf), buf);
for (int i = 0; i < (int)SK_ARRAY_COUNT(buf); i++) {
REPORTER_ASSERT(r, buf[i] == (int)SK_ARRAY_COUNT(buf)-i);
}
});
}
DEF_TEST(SkVM_mad, r) {
// This program is designed to exercise the tricky corners of instruction
// and register selection for Op::mad_f32.
skvm::Builder b;
{
skvm::Arg arg = b.varying<int>();
skvm::F32 x = b.to_F32(b.load32(arg)),
y = b.mad(x,x,x), // x is needed in the future, so r[x] != r[y].
z = b.mad(y,y,x), // y is needed in the future, but r[z] = r[x] is ok.
w = b.mad(z,z,y), // w can alias z but not y.
v = b.mad(w,y,w); // Got to stop somewhere.
b.store32(arg, b.trunc(v));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
int x = 2;
program.eval(1, &x);
// x = 2
// y = 2*2 + 2 = 6
// z = 6*6 + 2 = 38
// w = 38*38 + 6 = 1450
// v = 1450*6 + 1450 = 10150
REPORTER_ASSERT(r, x == 10150);
});
}
DEF_TEST(SkVM_fms, r) {
// Create a pattern that can be peepholed into an Op::fms_f32.
skvm::Builder b;
{
skvm::Arg arg = b.varying<int>();
skvm::F32 x = b.to_F32(b.load32(arg)),
v = b.sub(b.mul(x, b.splat(2.0f)),
b.splat(1.0f));
b.store32(arg, b.trunc(v));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
int buf[] = {0,1,2,3,4,5,6,7,8,9,10};
program.eval((int)SK_ARRAY_COUNT(buf), &buf);
for (int i = 0; i < (int)SK_ARRAY_COUNT(buf); i++) {
REPORTER_ASSERT(r, buf[i] = 2*i-1);
}
});
}
DEF_TEST(SkVM_fnma, r) {
// Create a pattern that can be peepholed into an Op::fnma_f32.
skvm::Builder b;
{
skvm::Arg arg = b.varying<int>();
skvm::F32 x = b.to_F32(b.load32(arg)),
v = b.sub(b.splat(1.0f),
b.mul(x, b.splat(2.0f)));
b.store32(arg, b.trunc(v));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
int buf[] = {0,1,2,3,4,5,6,7,8,9,10};
program.eval((int)SK_ARRAY_COUNT(buf), &buf);
for (int i = 0; i < (int)SK_ARRAY_COUNT(buf); i++) {
REPORTER_ASSERT(r, buf[i] = 1-2*i);
}
});
}
DEF_TEST(SkVM_madder, r) {
skvm::Builder b;
{
skvm::Arg arg = b.varying<float>();
skvm::F32 x = b.loadF(arg),
y = b.mad(x,x,x), // x is needed in the future, so r[x] != r[y].
z = b.mad(y,x,y), // r[x] can be reused after this instruction, but not r[y].
w = b.mad(y,y,z);
b.storeF(arg, w);
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
float x = 2.0f;
// y = 2*2 + 2 = 6
// z = 6*2 + 6 = 18
// w = 6*6 + 18 = 54
program.eval(1, &x);
REPORTER_ASSERT(r, x == 54.0f);
});
}
DEF_TEST(SkVM_floor, r) {
skvm::Builder b;
{
skvm::Arg arg = b.varying<float>();
b.storeF(arg, b.floor(b.loadF(arg)));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
float buf[] = { -2.0f, -1.5f, -1.0f, 0.0f, 1.0f, 1.5f, 2.0f };
float want[] = { -2.0f, -2.0f, -1.0f, 0.0f, 1.0f, 1.0f, 2.0f };
program.eval(SK_ARRAY_COUNT(buf), buf);
for (int i = 0; i < (int)SK_ARRAY_COUNT(buf); i++) {
REPORTER_ASSERT(r, buf[i] == want[i]);
}
});
}
DEF_TEST(SkVM_round, r) {
skvm::Builder b;
{
skvm::Arg src = b.varying<float>();
skvm::Arg dst = b.varying<int>();
b.store32(dst, b.round(b.loadF(src)));
}
// The test cases on exact 0.5f boundaries assume the current rounding mode is nearest even.
// We haven't explicitly guaranteed that here... it just probably is.
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
float buf[] = { -1.5f, -0.5f, 0.0f, 0.5f, 0.2f, 0.6f, 1.0f, 1.4f, 1.5f, 2.0f };
int want[] = { -2 , 0 , 0 , 0 , 0 , 1 , 1 , 1 , 2 , 2 };
int dst[SK_ARRAY_COUNT(buf)];
program.eval(SK_ARRAY_COUNT(buf), buf, dst);
for (int i = 0; i < (int)SK_ARRAY_COUNT(dst); i++) {
REPORTER_ASSERT(r, dst[i] == want[i]);
}
});
}
DEF_TEST(SkVM_min, r) {
skvm::Builder b;
{
skvm::Arg src1 = b.varying<float>();
skvm::Arg src2 = b.varying<float>();
skvm::Arg dst = b.varying<float>();
b.storeF(dst, b.min(b.loadF(src1), b.loadF(src2)));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
float s1[] = { 0.0f, 1.0f, 4.0f, -1.0f, -1.0f};
float s2[] = { 0.0f, 2.0f, 3.0f, 1.0f, -2.0f};
float want[] = { 0.0f, 1.0f, 3.0f, -1.0f, -2.0f};
float d[SK_ARRAY_COUNT(s1)];
program.eval(SK_ARRAY_COUNT(d), s1, s2, d);
for (int i = 0; i < (int)SK_ARRAY_COUNT(d); i++) {
REPORTER_ASSERT(r, d[i] == want[i]);
}
});
}
DEF_TEST(SkVM_max, r) {
skvm::Builder b;
{
skvm::Arg src1 = b.varying<float>();
skvm::Arg src2 = b.varying<float>();
skvm::Arg dst = b.varying<float>();
b.storeF(dst, b.max(b.loadF(src1), b.loadF(src2)));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
float s1[] = { 0.0f, 1.0f, 4.0f, -1.0f, -1.0f};
float s2[] = { 0.0f, 2.0f, 3.0f, 1.0f, -2.0f};
float want[] = { 0.0f, 2.0f, 4.0f, 1.0f, -1.0f};
float d[SK_ARRAY_COUNT(s1)];
program.eval(SK_ARRAY_COUNT(d), s1, s2, d);
for (int i = 0; i < (int)SK_ARRAY_COUNT(d); i++) {
REPORTER_ASSERT(r, d[i] == want[i]);
}
});
}
DEF_TEST(SkVM_hoist, r) {
// This program uses enough constants that it will fail to JIT if we hoist them.
// The JIT will try again without hoisting, and that'll just need 2 registers.
skvm::Builder b;
{
skvm::Arg arg = b.varying<int>();
skvm::I32 x = b.load32(arg);
for (int i = 0; i < 32; i++) {
x = b.add(x, b.splat(i));
}
b.store32(arg, x);
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
int x = 4;
program.eval(1, &x);
// x += 0 + 1 + 2 + 3 + ... + 30 + 31
// x += 496
REPORTER_ASSERT(r, x == 500);
});
}
DEF_TEST(SkVM_select, r) {
skvm::Builder b;
{
skvm::Arg buf = b.varying<int>();
skvm::I32 x = b.load32(buf);
x = b.select( b.gt(x, b.splat(4)), x, b.splat(42) );
b.store32(buf, x);
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
int buf[] = { 0,1,2,3,4,5,6,7,8 };
program.eval(SK_ARRAY_COUNT(buf), buf);
for (int i = 0; i < (int)SK_ARRAY_COUNT(buf); i++) {
REPORTER_ASSERT(r, buf[i] == (i > 4 ? i : 42));
}
});
}
DEF_TEST(SkVM_swap, r) {
skvm::Builder b;
{
// This program is the equivalent of
// x = *X
// y = *Y
// *X = y
// *Y = x
// One rescheduling of the program based only on data flow of Op arguments is
// x = *X
// *Y = x
// y = *Y
// *X = y
// but this reordering does not produce the same results and is invalid.
skvm::Arg X = b.varying<int>(),
Y = b.varying<int>();
skvm::I32 x = b.load32(X),
y = b.load32(Y);
b.store32(X, y);
b.store32(Y, x);
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
int b1[] = { 0,1,2,3 };
int b2[] = { 4,5,6,7 };
program.eval(SK_ARRAY_COUNT(b1), b1, b2);
for (int i = 0; i < (int)SK_ARRAY_COUNT(b1); i++) {
REPORTER_ASSERT(r, b1[i] == 4 + i);
REPORTER_ASSERT(r, b2[i] == i);
}
});
}
DEF_TEST(SkVM_NewOps, r) {
// Exercise a somewhat arbitrary set of new ops.
skvm::Builder b;
{
skvm::Arg buf = b.varying<int16_t>(),
uniforms = b.uniform();
skvm::I32 x = b.load16(buf);
const size_t kPtr = sizeof(const int*);
x = b.add(x, b.uniform32(uniforms, kPtr+0));
x = b.mul(x, b.uniform32(uniforms, kPtr+4));
x = b.sub(x, b.uniform32(uniforms, kPtr+8));
skvm::I32 limit = b.uniform32(uniforms, kPtr+12);
x = b.select(b.lt(x, b.splat(0)), b.splat(0), x);
x = b.select(b.gt(x, limit ), limit , x);
x = b.gather8(uniforms,0, x);
b.store16(buf, x);
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
const int N = 31;
int16_t buf[N];
for (int i = 0; i < N; i++) {
buf[i] = i;
}
const int M = 16;
uint8_t img[M];
for (int i = 0; i < M; i++) {
img[i] = i*i;
}
struct {
const uint8_t* img;
int add = 5;
int mul = 3;
int sub = 18;
int limit = M-1;
} uniforms{img};
program.eval(N, buf, &uniforms);
for (int i = 0; i < N; i++) {
// Our first math calculates x = (i+5)*3 - 18 a.k.a 3*(i-1).
int x = 3*(i-1);
// Then that's pinned to the limits of img.
if (i < 2) { x = 0; } // Notice i == 1 hits x == 0 exactly...
if (i > 5) { x = 15; } // ...and i == 6 hits x == 15 exactly
REPORTER_ASSERT(r, buf[i] == img[x]);
}
});
}
DEF_TEST(SkVM_sqrt, r) {
skvm::Builder b;
auto buf = b.varying<int>();
b.storeF(buf, b.sqrt(b.loadF(buf)));
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
constexpr int K = 17;
float buf[K];
for (int i = 0; i < K; i++) {
buf[i] = (float)(i*i);
}
// x^2 -> x
program.eval(K, buf);
for (int i = 0; i < K; i++) {
REPORTER_ASSERT(r, buf[i] == (float)i);
}
});
}
DEF_TEST(SkVM_MSAN, r) {
// This little memset32() program should be able to JIT, but if we run that
// JIT code in an MSAN build, it won't see the writes initialize buf. So
// this tests that we're using the interpreter instead.
skvm::Builder b;
b.store32(b.varying<int>(), b.splat(42));
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
constexpr int K = 17;
int buf[K]; // Intentionally uninitialized.
program.eval(K, buf);
sk_msan_assert_initialized(buf, buf+K);
for (int x : buf) {
REPORTER_ASSERT(r, x == 42);
}
});
}
DEF_TEST(SkVM_assert, r) {
skvm::Builder b;
b.assert_true(b.lt(b.load32(b.varying<int>()),
b.splat(42)));
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program) {
int buf[] = { 0,1,2,3,4,5,6,7,8,9 };
program.eval(SK_ARRAY_COUNT(buf), buf);
});
}
DEF_TEST(SkVM_premul, reporter) {
// Test that premul is short-circuited when alpha is known opaque.
{
skvm::Builder p;
auto rptr = p.varying<int>(),
aptr = p.varying<int>();
skvm::F32 r = p.loadF(rptr),
g = p.splat(0.0f),
b = p.splat(0.0f),
a = p.loadF(aptr);
p.premul(&r, &g, &b, a);
p.storeF(rptr, r);
// load red, load alpha, red *= alpha, store red
REPORTER_ASSERT(reporter, p.done().instructions().size() == 4);
}
{
skvm::Builder p;
auto rptr = p.varying<int>();
skvm::F32 r = p.loadF(rptr),
g = p.splat(0.0f),
b = p.splat(0.0f),
a = p.splat(1.0f);
p.premul(&r, &g, &b, a);
p.storeF(rptr, r);
// load red, store red
REPORTER_ASSERT(reporter, p.done().instructions().size() == 2);
}
// Same deal for unpremul.
{
skvm::Builder p;
auto rptr = p.varying<int>(),
aptr = p.varying<int>();
skvm::F32 r = p.loadF(rptr),
g = p.splat(0.0f),
b = p.splat(0.0f),
a = p.loadF(aptr);
p.unpremul(&r, &g, &b, a);
p.storeF(rptr, r);
// load red, load alpha, a bunch of unpremul instructions, store red
REPORTER_ASSERT(reporter, p.done().instructions().size() >= 4);
}
{
skvm::Builder p;
auto rptr = p.varying<int>();
skvm::F32 r = p.loadF(rptr),
g = p.splat(0.0f),
b = p.splat(0.0f),
a = p.splat(1.0f);
p.unpremul(&r, &g, &b, a);
p.storeF(rptr, r);
// load red, store red
REPORTER_ASSERT(reporter, p.done().instructions().size() == 2);
}
}
template <typename Fn>
static void test_asm(skiatest::Reporter* r, Fn&& fn, std::initializer_list<uint8_t> expected) {
uint8_t buf[4096];
skvm::Assembler a{buf};
fn(a);
REPORTER_ASSERT(r, a.size() == expected.size());
auto got = (const uint8_t*)buf,
want = expected.begin();
for (int i = 0; i < (int)std::min(a.size(), expected.size()); i++) {
REPORTER_ASSERT(r, got[i] == want[i],
"byte %d was %02x, want %02x", i, got[i], want[i]);
}
}
DEF_TEST(SkVM_Assembler, r) {
// Easiest way to generate test cases is
//
// echo '...some asm...' | llvm-mc -show-encoding -x86-asm-syntax=intel
//
// The -x86-asm-syntax=intel bit is optional, controlling the
// input syntax only; the output will always be AT&T op x,y,dst style.
// Our APIs read more like Intel op dst,x,y as op(dst,x,y), so I find
// that a bit easier to use here, despite maybe favoring AT&T overall.
using A = skvm::Assembler;
// Our exit strategy from AVX code.
test_asm(r, [&](A& a) {
a.int3();
a.vzeroupper();
a.ret();
},{
0xcc,
0xc5, 0xf8, 0x77,
0xc3,
});
// Align should pad with zero
test_asm(r, [&](A& a) {
a.ret();
a.align(4);
},{
0xc3,
0x00, 0x00, 0x00,
});
test_asm(r, [&](A& a) {
a.add(A::rax, 8); // Always good to test rax.
a.sub(A::rax, 32);
a.add(A::rdi, 12); // Last 0x48 REX
a.sub(A::rdi, 8);
a.add(A::r8 , 7); // First 0x49 REX
a.sub(A::r8 , 4);
a.add(A::rsi, 128); // Requires 4 byte immediate.
a.sub(A::r8 , 1000000);
a.add(A::Mem{A::rsi}, 7); // addq $7, (%rsi)
a.add(A::Mem{A::rsi, 12}, 7); // addq $7, 12(%rsi)
a.add(A::Mem{A::rsp, 12}, 7); // addq $7, 12(%rsp)
a.add(A::Mem{A::r12, 12}, 7); // addq $7, 12(%r12)
a.add(A::Mem{A::rsp, 12, A::rax, A::FOUR}, 7); // addq $7, 12(%rsp,%rax,4)
a.add(A::Mem{A::r12, 12, A::rax, A::FOUR}, 7); // addq $7, 12(%r12,%rax,4)
a.add(A::Mem{A::rax, 12, A::r12, A::FOUR}, 7); // addq $7, 12(%rax,%r12,4)
a.add(A::Mem{A::r11, 12, A::r8 , A::TWO }, 7); // addq $7, 12(%r11,%r8,2)
a.add(A::Mem{A::r11, 12, A::rax} , 7); // addq $7, 12(%r11,%rax)
a.add(A::Mem{A::rax, 12, A::r11} , 7); // addq $7, 12(%rax,%r11)
a.sub(A::Mem{A::rax, 12, A::r11} , 7); // subq $7, 12(%rax,%r11)
a.add( A::rax , A::rcx); // addq %rcx, %rax
a.add(A::Mem{A::rax} , A::rcx); // addq %rcx, (%rax)
a.add(A::Mem{A::rax, 12}, A::rcx); // addq %rcx, 12(%rax)
a.add(A::rcx, A::Mem{A::rax, 12}); // addq 12(%rax), %rcx
a.sub(A::rcx, A::Mem{A::rax, 12}); // subq 12(%rax), %rcx
},{
0x48, 0x83, 0b11'000'000, 0x08,
0x48, 0x83, 0b11'101'000, 0x20,
0x48, 0x83, 0b11'000'111, 0x0c,
0x48, 0x83, 0b11'101'111, 0x08,
0x49, 0x83, 0b11'000'000, 0x07,
0x49, 0x83, 0b11'101'000, 0x04,
0x48, 0x81, 0b11'000'110, 0x80, 0x00, 0x00, 0x00,
0x49, 0x81, 0b11'101'000, 0x40, 0x42, 0x0f, 0x00,
0x48,0x83,0x06,0x07,
0x48,0x83,0x46,0x0c,0x07,
0x48,0x83,0x44,0x24,0x0c,0x07,
0x49,0x83,0x44,0x24,0x0c,0x07,
0x48,0x83,0x44,0x84,0x0c,0x07,
0x49,0x83,0x44,0x84,0x0c,0x07,
0x4a,0x83,0x44,0xa0,0x0c,0x07,
0x4b,0x83,0x44,0x43,0x0c,0x07,
0x49,0x83,0x44,0x03,0x0c,0x07,
0x4a,0x83,0x44,0x18,0x0c,0x07,
0x4a,0x83,0x6c,0x18,0x0c,0x07,
0x48,0x01,0xc8,
0x48,0x01,0x08,
0x48,0x01,0x48,0x0c,
0x48,0x03,0x48,0x0c,
0x48,0x2b,0x48,0x0c,
});
test_asm(r, [&](A& a) {
a.vpaddd (A::ymm0, A::ymm1, A::ymm2); // Low registers and 0x0f map -> 2-byte VEX.
a.vpaddd (A::ymm8, A::ymm1, A::ymm2); // A high dst register is ok -> 2-byte VEX.
a.vpaddd (A::ymm0, A::ymm8, A::ymm2); // A high first argument register -> 2-byte VEX.
a.vpaddd (A::ymm0, A::ymm1, A::ymm8); // A high second argument -> 3-byte VEX.
a.vpmulld(A::ymm0, A::ymm1, A::ymm2); // Using non-0x0f map instruction -> 3-byte VEX.
a.vpsubd (A::ymm0, A::ymm1, A::ymm2); // Test vpsubd to ensure argument order is right.
},{
/* VEX */ /*op*/ /*modRM*/
0xc5, 0xf5, 0xfe, 0xc2,
0xc5, 0x75, 0xfe, 0xc2,
0xc5, 0xbd, 0xfe, 0xc2,
0xc4, 0xc1, 0x75, 0xfe, 0xc0,
0xc4, 0xe2, 0x75, 0x40, 0xc2,
0xc5, 0xf5, 0xfa, 0xc2,
});
test_asm(r, [&](A& a) {
a.vpaddw (A::ymm4, A::ymm3, A::ymm2);
a.vpavgw (A::ymm4, A::ymm3, A::ymm2);
a.vpcmpeqw (A::ymm4, A::ymm3, A::ymm2);
a.vpcmpgtw (A::ymm4, A::ymm3, A::ymm2);
a.vpminsw (A::ymm4, A::ymm3, A::ymm2);
a.vpmaxsw (A::ymm4, A::ymm3, A::ymm2);
a.vpminuw (A::ymm4, A::ymm3, A::ymm2);
a.vpmaxuw (A::ymm4, A::ymm3, A::ymm2);
a.vpmulhrsw(A::ymm4, A::ymm3, A::ymm2);
a.vpabsw (A::ymm4, A::ymm3);
a.vpsllw (A::ymm4, A::ymm3, 12);
a.vpsraw (A::ymm4, A::ymm3, 12);
},{
0xc5, 0xe5, 0xfd, 0xe2,
0xc5, 0xe5, 0xe3, 0xe2,
0xc5, 0xe5, 0x75, 0xe2,
0xc5, 0xe5, 0x65, 0xe2,
0xc5, 0xe5, 0xea, 0xe2,
0xc5, 0xe5, 0xee, 0xe2,
0xc4,0xe2,0x65, 0x3a, 0xe2,
0xc4,0xe2,0x65, 0x3e, 0xe2,
0xc4,0xe2,0x65, 0x0b, 0xe2,
0xc4,0xe2,0x7d, 0x1d, 0xe3,
0xc5,0xdd,0x71, 0xf3, 0x0c,
0xc5,0xdd,0x71, 0xe3, 0x0c,
});
test_asm(r, [&](A& a) {
A::Label l;
a.vcmpeqps (A::ymm0, A::ymm1, &l); // vcmpeqps 0x1c(%rip), %ymm1, %ymm0
a.vpcmpeqd (A::ymm0, A::ymm1, A::ymm2);
a.vpcmpgtd (A::ymm0, A::ymm1, A::ymm2);
a.vcmpeqps (A::ymm0, A::ymm1, A::ymm2);
a.vcmpltps (A::ymm0, A::ymm1, A::ymm2);
a.vcmpleps (A::ymm0, A::ymm1, A::ymm2);
a.vcmpneqps(A::ymm0, A::ymm1, A::ymm2);
a.label(&l); // 28 bytes after the vcmpeqps that uses it.
},{
0xc5,0xf4,0xc2,0x05,0x1c,0x00,0x00,0x00,0x00,
0xc5,0xf5,0x76,0xc2,
0xc5,0xf5,0x66,0xc2,
0xc5,0xf4,0xc2,0xc2,0x00,
0xc5,0xf4,0xc2,0xc2,0x01,
0xc5,0xf4,0xc2,0xc2,0x02,
0xc5,0xf4,0xc2,0xc2,0x04,
});
test_asm(r, [&](A& a) {
a.vminps(A::ymm0, A::ymm1, A::ymm2);
a.vmaxps(A::ymm0, A::ymm1, A::ymm2);
},{
0xc5,0xf4,0x5d,0xc2,
0xc5,0xf4,0x5f,0xc2,
});
test_asm(r, [&](A& a) {
a.vpblendvb(A::ymm0, A::ymm1, A::ymm2, A::ymm3);
},{
0xc4,0xe3,0x75, 0x4c, 0xc2, 0x30,
});
test_asm(r, [&](A& a) {
a.vpsrld(A::ymm15, A::ymm2, 8);
a.vpsrld(A::ymm0 , A::ymm8, 5);
},{
0xc5, 0x85, 0x72,0xd2, 0x08,
0xc4,0xc1,0x7d, 0x72,0xd0, 0x05,
});
test_asm(r, [&](A& a) {
A::Label l;
a.vpermps(A::ymm1, A::ymm2, A::Mem{A::rdi, 32});
a.vperm2f128(A::ymm1, A::ymm2, &l, 0x20);
a.vpermq(A::ymm1, A::ymm2, 5);
a.label(&l); // 6 bytes after vperm2f128
},{
0xc4,0xe2,0x6d,0x16,0x4f,0x20,
0xc4,0xe3,0x6d,0x06,0x0d,0x06,0x00,0x00,0x00,0x20,
0xc4,0xe3,0xfd, 0x00,0xca, 0x05,
});
test_asm(r, [&](A& a) {
a.vpunpckldq(A::ymm1, A::ymm2, A::Mem{A::rdi});
a.vpunpckhdq(A::ymm1, A::ymm2, A::ymm3);
},{
0xc5,0xed,0x62,0x0f,
0xc5,0xed,0x6a,0xcb,
});
test_asm(r, [&](A& a) {
a.vroundps(A::ymm1, A::ymm2, A::NEAREST);
a.vroundps(A::ymm1, A::ymm2, A::FLOOR);
a.vroundps(A::ymm1, A::ymm2, A::CEIL);
a.vroundps(A::ymm1, A::ymm2, A::TRUNC);
},{
0xc4,0xe3,0x7d,0x08,0xca,0x00,
0xc4,0xe3,0x7d,0x08,0xca,0x01,
0xc4,0xe3,0x7d,0x08,0xca,0x02,
0xc4,0xe3,0x7d,0x08,0xca,0x03,
});
test_asm(r, [&](A& a) {
A::Label l;
a.label(&l);
a.byte(1);
a.byte(2);
a.byte(3);
a.byte(4);
a.vbroadcastss(A::ymm0 , &l);
a.vbroadcastss(A::ymm1 , &l);
a.vbroadcastss(A::ymm8 , &l);
a.vbroadcastss(A::ymm15, &l);
a.vpshufb(A::ymm4, A::ymm3, &l);
a.vpaddd (A::ymm4, A::ymm3, &l);
a.vpsubd (A::ymm4, A::ymm3, &l);
a.vptest(A::ymm4, &l);
a.vmulps (A::ymm4, A::ymm3, &l);
},{
0x01, 0x02, 0x03, 0x4,
/* VEX */ /*op*/ /* ModRM */ /* offset */
0xc4, 0xe2, 0x7d, 0x18, 0b00'000'101, 0xf3,0xff,0xff,0xff, // 0xfffffff3 == -13
0xc4, 0xe2, 0x7d, 0x18, 0b00'001'101, 0xea,0xff,0xff,0xff, // 0xffffffea == -22
0xc4, 0x62, 0x7d, 0x18, 0b00'000'101, 0xe1,0xff,0xff,0xff, // 0xffffffe1 == -31
0xc4, 0x62, 0x7d, 0x18, 0b00'111'101, 0xd8,0xff,0xff,0xff, // 0xffffffd8 == -40
0xc4, 0xe2, 0x65, 0x00, 0b00'100'101, 0xcf,0xff,0xff,0xff, // 0xffffffcf == -49
0xc5, 0xe5, 0xfe, 0b00'100'101, 0xc7,0xff,0xff,0xff, // 0xffffffc7 == -57
0xc5, 0xe5, 0xfa, 0b00'100'101, 0xbf,0xff,0xff,0xff, // 0xffffffbf == -65
0xc4, 0xe2, 0x7d, 0x17, 0b00'100'101, 0xb6,0xff,0xff,0xff, // 0xffffffb6 == -74
0xc5, 0xe4, 0x59, 0b00'100'101, 0xae,0xff,0xff,0xff, // 0xffffffaf == -82
});
test_asm(r, [&](A& a) {
a.vbroadcastss(A::ymm0, A::Mem{A::rdi, 0});
a.vbroadcastss(A::ymm13, A::Mem{A::r14, 7});
a.vbroadcastss(A::ymm8, A::Mem{A::rdx, -12});
a.vbroadcastss(A::ymm8, A::Mem{A::rdx, 400});
a.vbroadcastss(A::ymm8, A::xmm0);
a.vbroadcastss(A::ymm0, A::xmm13);
},{
/* VEX */ /*op*/ /*ModRM*/ /*offset*/
0xc4,0xe2,0x7d, 0x18, 0b00'000'111,
0xc4,0x42,0x7d, 0x18, 0b01'101'110, 0x07,
0xc4,0x62,0x7d, 0x18, 0b01'000'010, 0xf4,
0xc4,0x62,0x7d, 0x18, 0b10'000'010, 0x90,0x01,0x00,0x00,
0xc4,0x62,0x7d, 0x18, 0b11'000'000,
0xc4,0xc2,0x7d, 0x18, 0b11'000'101,
});
test_asm(r, [&](A& a) {
A::Label l;
a.label(&l);
a.jne(&l);
a.jne(&l);
a.je (&l);
a.jmp(&l);
a.jl (&l);
a.jc (&l);
a.cmp(A::rdx, 1);
a.cmp(A::rax, 12);
a.cmp(A::r14, 2000000000);
},{
0x0f,0x85, 0xfa,0xff,0xff,0xff, // near jne -6 bytes
0x0f,0x85, 0xf4,0xff,0xff,0xff, // near jne -12 bytes
0x0f,0x84, 0xee,0xff,0xff,0xff, // near je -18 bytes
0xe9, 0xe9,0xff,0xff,0xff, // near jmp -23 bytes
0x0f,0x8c, 0xe3,0xff,0xff,0xff, // near jl -29 bytes
0x0f,0x82, 0xdd,0xff,0xff,0xff, // near jc -35 bytes
0x48,0x83,0xfa,0x01,
0x48,0x83,0xf8,0x0c,
0x49,0x81,0xfe,0x00,0x94,0x35,0x77,
});
test_asm(r, [&](A& a) {
a.vmovups(A::ymm5, A::Mem{A::rsi});
a.vmovups(A::Mem{A::rsi}, A::ymm5);
a.vmovups(A::xmm5, A::Mem{A::rsi});
a.vmovups(A::Mem{A::rsi}, A::xmm5);
a.vpmovzxwd(A::ymm4, A::Mem{A::rsi});
a.vpmovzxbd(A::ymm4, A::Mem{A::rsi});
a.vmovq(A::Mem{A::rdx}, A::xmm15);
},{
/* VEX */ /*Op*/ /* ModRM */
0xc5, 0xfc, 0x10, 0b00'101'110,
0xc5, 0xfc, 0x11, 0b00'101'110,
0xc5, 0xf8, 0x10, 0b00'101'110,
0xc5, 0xf8, 0x11, 0b00'101'110,
0xc4,0xe2,0x7d, 0x33, 0b00'100'110,
0xc4,0xe2,0x7d, 0x31, 0b00'100'110,
0xc5, 0x79, 0xd6, 0b00'111'010,
});
test_asm(r, [&](A& a) {
a.vmovups(A::ymm5, A::Mem{A::rsp, 0});
a.vmovups(A::ymm5, A::Mem{A::rsp, 64});
a.vmovups(A::ymm5, A::Mem{A::rsp,128});
a.vmovups(A::Mem{A::rsp, 0}, A::ymm5);
a.vmovups(A::Mem{A::rsp, 64}, A::ymm5);
a.vmovups(A::Mem{A::rsp,128}, A::ymm5);
},{
0xc5,0xfc,0x10,0x2c,0x24,
0xc5,0xfc,0x10,0x6c,0x24,0x40,
0xc5,0xfc,0x10,0xac,0x24,0x80,0x00,0x00,0x00,
0xc5,0xfc,0x11,0x2c,0x24,
0xc5,0xfc,0x11,0x6c,0x24,0x40,
0xc5,0xfc,0x11,0xac,0x24,0x80,0x00,0x00,0x00,
});
test_asm(r, [&](A& a) {
a.movzbq(A::rax, A::Mem{A::rsi}); // Low registers for src and dst.
a.movzbq(A::rax, A::Mem{A::r8,}); // High src register.
a.movzbq(A::r8 , A::Mem{A::rsi}); // High dst register.
a.movzbq(A::r8, A::Mem{A::rsi, 12});
a.movzbq(A::r8, A::Mem{A::rsi, 400});
a.movzwq(A::rax, A::Mem{A::rsi}); // Low registers for src and dst.
a.movzwq(A::rax, A::Mem{A::r8,}); // High src register.
a.movzwq(A::r8 , A::Mem{A::rsi}); // High dst register.
a.movzwq(A::r8, A::Mem{A::rsi, 12});
a.movzwq(A::r8, A::Mem{A::rsi, 400});
a.vmovd(A::Mem{A::rax}, A::xmm0);
a.vmovd(A::Mem{A::rax}, A::xmm8);
a.vmovd(A::Mem{A::r8 }, A::xmm0);
a.vmovd(A::xmm0, A::Mem{A::rax});
a.vmovd(A::xmm8, A::Mem{A::rax});
a.vmovd(A::xmm0, A::Mem{A::r8 });
a.vmovd(A::xmm0 , A::Mem{A::rax, 0, A::rcx, A::FOUR});
a.vmovd(A::xmm15, A::Mem{A::rax, 0, A::r8, A::TWO });
a.vmovd(A::xmm0 , A::Mem{A::r8 , 0, A::rcx});
a.vmovd(A::rax, A::xmm0);
a.vmovd(A::rax, A::xmm8);
a.vmovd(A::r8 , A::xmm0);
a.vmovd(A::xmm0, A::rax);
a.vmovd(A::xmm8, A::rax);
a.vmovd(A::xmm0, A::r8 );
a.movb(A::Mem{A::rdx}, A::rax);
a.movb(A::Mem{A::rdx}, A::r8 );
a.movb(A::Mem{A::r8 }, A::rax);
a.movb(A::rdx, A::Mem{A::rax});
a.movb(A::rdx, A::Mem{A::r8 });
a.movb(A::r8 , A::Mem{A::rax});
a.movb(A::rdx, 12);
a.movb(A::rax, 4);
a.movb(A::r8 , -1);
a.movb(A::Mem{A::rdx}, 12);
a.movb(A::Mem{A::rax}, 4);
a.movb(A::Mem{A::r8 }, -1);
},{
0x48,0x0f,0xb6,0x06, // movzbq (%rsi), %rax
0x49,0x0f,0xb6,0x00,
0x4c,0x0f,0xb6,0x06,
0x4c,0x0f,0xb6,0x46, 12,
0x4c,0x0f,0xb6,0x86, 0x90,0x01,0x00,0x00,
0x48,0x0f,0xb7,0x06, // movzwq (%rsi), %rax
0x49,0x0f,0xb7,0x00,
0x4c,0x0f,0xb7,0x06,
0x4c,0x0f,0xb7,0x46, 12,
0x4c,0x0f,0xb7,0x86, 0x90,0x01,0x00,0x00,
0xc5,0xf9,0x7e,0x00,
0xc5,0x79,0x7e,0x00,
0xc4,0xc1,0x79,0x7e,0x00,
0xc5,0xf9,0x6e,0x00,
0xc5,0x79,0x6e,0x00,
0xc4,0xc1,0x79,0x6e,0x00,
0xc5,0xf9,0x6e,0x04,0x88,
0xc4,0x21,0x79,0x6e,0x3c,0x40,
0xc4,0xc1,0x79,0x6e,0x04,0x08,
0xc5,0xf9,0x7e,0xc0,
0xc5,0x79,0x7e,0xc0,
0xc4,0xc1,0x79,0x7e,0xc0,
0xc5,0xf9,0x6e,0xc0,
0xc5,0x79,0x6e,0xc0,
0xc4,0xc1,0x79,0x6e,0xc0,
0x48 ,0x88, 0x02,
0x4c, 0x88, 0x02,
0x49, 0x88, 0x00,
0x48 ,0x8a, 0x10,
0x49, 0x8a, 0x10,
0x4c, 0x8a, 0x00,
0x48, 0xc6, 0xc2, 0x0c,
0x48, 0xc6, 0xc0, 0x04,
0x49, 0xc6, 0xc0, 0xff,
0x48, 0xc6, 0x02, 0x0c,
0x48, 0xc6, 0x00, 0x04,
0x49, 0xc6, 0x00, 0xff,
});
test_asm(r, [&](A& a) {
a.vpinsrd(A::xmm1, A::xmm8, A::Mem{A::rsi}, 1); // vpinsrd $1, (%rsi), %xmm8, %xmm1
a.vpinsrd(A::xmm8, A::xmm1, A::Mem{A::r8 }, 3); // vpinsrd $3, (%r8), %xmm1, %xmm8;
a.vpinsrw(A::xmm1, A::xmm8, A::Mem{A::rsi}, 4); // vpinsrw $4, (%rsi), %xmm8, %xmm1
a.vpinsrw(A::xmm8, A::xmm1, A::Mem{A::r8 }, 12); // vpinrsw $12, (%r8), %xmm1, %xmm8
a.vpinsrb(A::xmm1, A::xmm8, A::Mem{A::rsi}, 4); // vpinsrb $4, (%rsi), %xmm8, %xmm1
a.vpinsrb(A::xmm8, A::xmm1, A::Mem{A::r8 }, 12); // vpinsrb $12, (%r8), %xmm1, %xmm8
a.vextracti128(A::xmm1, A::ymm8, 1); // vextracti128 $1, %ymm8, %xmm1
a.vextracti128(A::xmm8, A::ymm1, 0); // vextracti128 $0, %ymm1, %xmm8
a.vpextrd(A::Mem{A::rsi}, A::xmm8, 3); // vpextrd $3, %xmm8, (%rsi)
a.vpextrd(A::Mem{A::r8 }, A::xmm1, 2); // vpextrd $2, %xmm1, (%r8)
a.vpextrw(A::Mem{A::rsi}, A::xmm8, 7);
a.vpextrw(A::Mem{A::r8 }, A::xmm1, 15);
a.vpextrb(A::Mem{A::rsi}, A::xmm8, 7);
a.vpextrb(A::Mem{A::r8 }, A::xmm1, 15);
},{
0xc4,0xe3,0x39, 0x22, 0x0e, 1,
0xc4,0x43,0x71, 0x22, 0x00, 3,
0xc5,0xb9, 0xc4, 0x0e, 4,
0xc4,0x41,0x71, 0xc4, 0x00, 12,
0xc4,0xe3,0x39, 0x20, 0x0e, 4,
0xc4,0x43,0x71, 0x20, 0x00, 12,
0xc4,0x63,0x7d,0x39,0xc1, 1,
0xc4,0xc3,0x7d,0x39,0xc8, 0,
0xc4,0x63,0x79,0x16,0x06, 3,
0xc4,0xc3,0x79,0x16,0x08, 2,
0xc4,0x63,0x79, 0x15, 0x06, 7,
0xc4,0xc3,0x79, 0x15, 0x08, 15,
0xc4,0x63,0x79, 0x14, 0x06, 7,
0xc4,0xc3,0x79, 0x14, 0x08, 15,
});
test_asm(r, [&](A& a) {
a.vpandn(A::ymm3, A::ymm12, A::ymm2);
},{
0xc5, 0x9d, 0xdf, 0xda,
});
test_asm(r, [&](A& a) {
A::Label l;
a.vmovdqa(A::ymm3, A::ymm2); // vmovdqa %ymm2 , %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::rsi}); // vmovdqa (%rsi) , %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::rsp}); // vmovdqa (%rsp) , %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::r11}); // vmovdqa (%r11) , %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::rsi, 4}); // vmovdqa 4(%rsi) , %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::rsp, 4}); // vmovdqa 4(%rsp) , %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::rsi, 4, A::rax, A::EIGHT}); // vmovdqa 4(%rsi,%rax,8), %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::r11, 4, A::rax, A::TWO }); // vmovdqa 4(%r11,%rax,2), %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::rsi, 4, A::r11, A::FOUR }); // vmovdqa 4(%rsi,%r11,4), %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::rsi, 4, A::r11, A::ONE }); // vmovdqa 4(%rsi,%r11,1), %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::rsi, 4, A::r11}); // vmovdqa 4(%rsi,%r11) , %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::rsi, 64, A::r11}); // vmovdqa 64(%rsi,%r11), %ymm3
a.vmovdqa(A::ymm3, A::Mem{A::rsi, 128, A::r11}); // vmovdqa 128(%rsi,%r11), %ymm3
a.vmovdqa(A::ymm3, &l); // vmovdqa 16(%rip) , %ymm3
a.vcvttps2dq(A::ymm3, A::ymm2);
a.vcvtdq2ps (A::ymm3, A::ymm2);
a.vcvtps2dq (A::ymm3, A::ymm2);
a.vsqrtps (A::ymm3, A::ymm2);
a.label(&l);
},{
0xc5,0xfd,0x6f,0xda,
0xc5,0xfd,0x6f,0x1e,
0xc5,0xfd,0x6f,0x1c,0x24,
0xc4,0xc1,0x7d,0x6f,0x1b,
0xc5,0xfd,0x6f,0x5e,0x04,
0xc5,0xfd,0x6f,0x5c,0x24,0x04,
0xc5,0xfd,0x6f,0x5c,0xc6,0x04,
0xc4,0xc1,0x7d,0x6f,0x5c,0x43,0x04,
0xc4,0xa1,0x7d,0x6f,0x5c,0x9e,0x04,
0xc4,0xa1,0x7d,0x6f,0x5c,0x1e,0x04,
0xc4,0xa1,0x7d,0x6f,0x5c,0x1e,0x04,
0xc4,0xa1,0x7d,0x6f,0x5c,0x1e,0x40,
0xc4,0xa1,0x7d,0x6f,0x9c,0x1e,0x80,0x00,0x00,0x00,
0xc5,0xfd,0x6f,0x1d,0x10,0x00,0x00,0x00,
0xc5,0xfe,0x5b,0xda,
0xc5,0xfc,0x5b,0xda,
0xc5,0xfd,0x5b,0xda,
0xc5,0xfc,0x51,0xda,
});
test_asm(r, [&](A& a) {
a.vcvtps2ph(A::xmm3, A::ymm2, A::CURRENT);
a.vcvtps2ph(A::Mem{A::rsi, 32, A::rax, A::EIGHT}, A::ymm5, A::CEIL);
a.vcvtph2ps(A::ymm15, A::Mem{A::rdi, 12, A::r9, A::ONE});
a.vcvtph2ps(A::ymm2, A::xmm3);
},{
0xc4,0xe3,0x7d,0x1d,0xd3,0x04,
0xc4,0xe3,0x7d,0x1d,0x6c,0xc6,0x20,0x02,
0xc4,0x22,0x7d,0x13,0x7c,0x0f,0x0c,
0xc4,0xe2,0x7d,0x13,0xd3,
});
test_asm(r, [&](A& a) {
a.vgatherdps(A::ymm1 , A::FOUR , A::ymm0 , A::rdi, A::ymm2 );
a.vgatherdps(A::ymm0 , A::ONE , A::ymm2 , A::rax, A::ymm1 );
a.vgatherdps(A::ymm10, A::ONE , A::ymm2 , A::rax, A::ymm1 );
a.vgatherdps(A::ymm0 , A::ONE , A::ymm12, A::rax, A::ymm1 );
a.vgatherdps(A::ymm0 , A::ONE , A::ymm2 , A::r9 , A::ymm1 );
a.vgatherdps(A::ymm0 , A::ONE , A::ymm2 , A::rax, A::ymm12);
a.vgatherdps(A::ymm0 , A::EIGHT, A::ymm2 , A::rax, A::ymm12);
},{
0xc4,0xe2,0x6d,0x92,0x0c,0x87,
0xc4,0xe2,0x75,0x92,0x04,0x10,
0xc4,0x62,0x75,0x92,0x14,0x10,
0xc4,0xa2,0x75,0x92,0x04,0x20,
0xc4,0xc2,0x75,0x92,0x04,0x11,
0xc4,0xe2,0x1d,0x92,0x04,0x10,
0xc4,0xe2,0x1d,0x92,0x04,0xd0,
});
test_asm(r, [&](A& a) {
a.mov(A::rax, A::Mem{A::rdi, 0});
a.mov(A::rax, A::Mem{A::rdi, 1});
a.mov(A::rax, A::Mem{A::rdi, 512});
a.mov(A::r15, A::Mem{A::r13, 42});
a.mov(A::rax, A::Mem{A::r13, 42});
a.mov(A::r15, A::Mem{A::rax, 42});
a.mov(A::rax, 1);
a.mov(A::rax, A::rcx);
},{
0x48, 0x8b, 0x07,
0x48, 0x8b, 0x47, 0x01,
0x48, 0x8b, 0x87, 0x00,0x02,0x00,0x00,
0x4d, 0x8b, 0x7d, 0x2a,
0x49, 0x8b, 0x45, 0x2a,
0x4c, 0x8b, 0x78, 0x2a,
0x48, 0xc7, 0xc0, 0x01,0x00,0x00,0x00,
0x48, 0x89, 0xc8,
});
// echo "fmul v4.4s, v3.4s, v1.4s" | llvm-mc -show-encoding -arch arm64
test_asm(r, [&](A& a) {
a.and16b(A::v4, A::v3, A::v1);
a.orr16b(A::v4, A::v3, A::v1);
a.eor16b(A::v4, A::v3, A::v1);
a.bic16b(A::v4, A::v3, A::v1);
a.bsl16b(A::v4, A::v3, A::v1);
a.not16b(A::v4, A::v3);
a.add4s(A::v4, A::v3, A::v1);
a.sub4s(A::v4, A::v3, A::v1);
a.mul4s(A::v4, A::v3, A::v1);
a.cmeq4s(A::v4, A::v3, A::v1);
a.cmgt4s(A::v4, A::v3, A::v1);
a.sub8h(A::v4, A::v3, A::v1);
a.mul8h(A::v4, A::v3, A::v1);
a.fadd4s(A::v4, A::v3, A::v1);
a.fsub4s(A::v4, A::v3, A::v1);
a.fmul4s(A::v4, A::v3, A::v1);
a.fdiv4s(A::v4, A::v3, A::v1);
a.fmin4s(A::v4, A::v3, A::v1);
a.fmax4s(A::v4, A::v3, A::v1);
a.fneg4s (A::v4, A::v3);
a.fsqrt4s(A::v4, A::v3);
a.fmla4s(A::v4, A::v3, A::v1);
a.fmls4s(A::v4, A::v3, A::v1);
a.fcmeq4s(A::v4, A::v3, A::v1);
a.fcmgt4s(A::v4, A::v3, A::v1);
a.fcmge4s(A::v4, A::v3, A::v1);
},{
0x64,0x1c,0x21,0x4e,
0x64,0x1c,0xa1,0x4e,
0x64,0x1c,0x21,0x6e,
0x64,0x1c,0x61,0x4e,
0x64,0x1c,0x61,0x6e,
0x64,0x58,0x20,0x6e,
0x64,0x84,0xa1,0x4e,
0x64,0x84,0xa1,0x6e,
0x64,0x9c,0xa1,0x4e,
0x64,0x8c,0xa1,0x6e,
0x64,0x34,0xa1,0x4e,
0x64,0x84,0x61,0x6e,
0x64,0x9c,0x61,0x4e,
0x64,0xd4,0x21,0x4e,
0x64,0xd4,0xa1,0x4e,
0x64,0xdc,0x21,0x6e,
0x64,0xfc,0x21,0x6e,
0x64,0xf4,0xa1,0x4e,
0x64,0xf4,0x21,0x4e,
0x64,0xf8,0xa0,0x6e,
0x64,0xf8,0xa1,0x6e,
0x64,0xcc,0x21,0x4e,
0x64,0xcc,0xa1,0x4e,
0x64,0xe4,0x21,0x4e,
0x64,0xe4,0xa1,0x6e,
0x64,0xe4,0x21,0x6e,
});
test_asm(r, [&](A& a) {
a.shl4s(A::v4, A::v3, 0);
a.shl4s(A::v4, A::v3, 1);
a.shl4s(A::v4, A::v3, 8);
a.shl4s(A::v4, A::v3, 16);
a.shl4s(A::v4, A::v3, 31);
a.sshr4s(A::v4, A::v3, 1);
a.sshr4s(A::v4, A::v3, 8);
a.sshr4s(A::v4, A::v3, 31);
a.ushr4s(A::v4, A::v3, 1);
a.ushr4s(A::v4, A::v3, 8);
a.ushr4s(A::v4, A::v3, 31);
a.ushr8h(A::v4, A::v3, 1);
a.ushr8h(A::v4, A::v3, 8);
a.ushr8h(A::v4, A::v3, 15);
},{
0x64,0x54,0x20,0x4f,
0x64,0x54,0x21,0x4f,
0x64,0x54,0x28,0x4f,
0x64,0x54,0x30,0x4f,
0x64,0x54,0x3f,0x4f,
0x64,0x04,0x3f,0x4f,
0x64,0x04,0x38,0x4f,
0x64,0x04,0x21,0x4f,
0x64,0x04,0x3f,0x6f,
0x64,0x04,0x38,0x6f,
0x64,0x04,0x21,0x6f,
0x64,0x04,0x1f,0x6f,
0x64,0x04,0x18,0x6f,
0x64,0x04,0x11,0x6f,
});
test_asm(r, [&](A& a) {
a.sli4s(A::v4, A::v3, 0);
a.sli4s(A::v4, A::v3, 1);
a.sli4s(A::v4, A::v3, 8);
a.sli4s(A::v4, A::v3, 16);
a.sli4s(A::v4, A::v3, 31);
},{
0x64,0x54,0x20,0x6f,
0x64,0x54,0x21,0x6f,
0x64,0x54,0x28,0x6f,
0x64,0x54,0x30,0x6f,
0x64,0x54,0x3f,0x6f,
});
test_asm(r, [&](A& a) {
a.scvtf4s (A::v4, A::v3);
a.fcvtzs4s(A::v4, A::v3);
a.fcvtns4s(A::v4, A::v3);
a.frintp4s(A::v4, A::v3);
a.frintm4s(A::v4, A::v3);
a.fcvtn (A::v4, A::v3);
a.fcvtl (A::v4, A::v3);
},{
0x64,0xd8,0x21,0x4e,
0x64,0xb8,0xa1,0x4e,
0x64,0xa8,0x21,0x4e,
0x64,0x88,0xa1,0x4e,
0x64,0x98,0x21,0x4e,
0x64,0x68,0x21,0x0e,
0x64,0x78,0x21,0x0e,
});
test_asm(r, [&](A& a) {
a.sub (A::sp, A::sp, 32); // sub sp, sp, #32
a.strq(A::v0, A::sp, 1); // str q0, [sp, #16]
a.strq(A::v1, A::sp); // str q1, [sp]
a.strd(A::v0, A::sp, 6); // str s0, [sp, #48]
a.strs(A::v0, A::sp, 6); // str s0, [sp, #24]
a.strh(A::v0, A::sp, 10); // str h0, [sp, #20]
a.strb(A::v0, A::sp, 47); // str b0, [sp, #47]
a.ldrb(A::v9, A::sp, 42); // ldr b9, [sp, #42]
a.ldrh(A::v9, A::sp, 47); // ldr h9, [sp, #94]
a.ldrs(A::v7, A::sp, 10); // ldr s7, [sp, #40]
a.ldrd(A::v7, A::sp, 1); // ldr d7, [sp, #8]
a.ldrq(A::v5, A::sp, 128); // ldr q5, [sp, #2048]
a.add (A::sp, A::sp, 32); // add sp, sp, #32
},{
0xff,0x83,0x00,0xd1,
0xe0,0x07,0x80,0x3d,
0xe1,0x03,0x80,0x3d,
0xe0,0x1b,0x00,0xfd,
0xe0,0x1b,0x00,0xbd,
0xe0,0x2b,0x00,0x7d,
0xe0,0xbf,0x00,0x3d,
0xe9,0xab,0x40,0x3d,
0xe9,0xbf,0x40,0x7d,
0xe7,0x2b,0x40,0xbd,
0xe7,0x07,0x40,0xfd,
0xe5,0x03,0xc2,0x3d,
0xff,0x83,0x00,0x91,
});
test_asm(r, [&](A& a) {
a.brk(0);
a.brk(65535);
a.ret(A::x30); // Conventional ret using link register.
a.ret(A::x13); // Can really return using any register if we like.
a.add(A::x2, A::x2, 4);
a.add(A::x3, A::x2, 32);
a.sub(A::x2, A::x2, 4);
a.sub(A::x3, A::x2, 32);
a.subs(A::x2, A::x2, 4);
a.subs(A::x3, A::x2, 32);
a.subs(A::xzr, A::x2, 4); // These are actually the same instruction!
a.cmp(A::x2, 4);
A::Label l;
a.label(&l);
a.bne(&l);
a.bne(&l);
a.blt(&l);
a.b(&l);
a.cbnz(A::x2, &l);
a.cbz(A::x2, &l);
a.add(A::x3, A::x2, A::x1); // add x3,x2,x1
a.add(A::x3, A::x2, A::x1, A::ASR, 3); // add x3,x2,x1, asr #3
},{
0x00,0x00,0x20,0xd4,
0xe0,0xff,0x3f,0xd4,
0xc0,0x03,0x5f,0xd6,
0xa0,0x01,0x5f,0xd6,
0x42,0x10,0x00,0x91,
0x43,0x80,0x00,0x91,
0x42,0x10,0x00,0xd1,
0x43,0x80,0x00,0xd1,
0x42,0x10,0x00,0xf1,
0x43,0x80,0x00,0xf1,
0x5f,0x10,0x00,0xf1,
0x5f,0x10,0x00,0xf1,
0x01,0x00,0x00,0x54, // b.ne #0
0xe1,0xff,0xff,0x54, // b.ne #-4
0xcb,0xff,0xff,0x54, // b.lt #-8
0xae,0xff,0xff,0x54, // b.al #-12
0x82,0xff,0xff,0xb5, // cbnz x2, #-16
0x62,0xff,0xff,0xb4, // cbz x2, #-20
0x43,0x00,0x01,0x8b,
0x43,0x0c,0x81,0x8b,
});
// Can we cbz() to a not-yet-defined label?
test_asm(r, [&](A& a) {
A::Label l;
a.cbz(A::x2, &l);
a.add(A::x3, A::x2, 32);
a.label(&l);
a.ret(A::x30);
},{
0x42,0x00,0x00,0xb4, // cbz x2, #8
0x43,0x80,0x00,0x91, // add x3, x2, #32
0xc0,0x03,0x5f,0xd6, // ret
});
// If we start a label as a backward label,
// can we redefine it to be a future label?
// (Not sure this is useful... just want to test it works.)
test_asm(r, [&](A& a) {
A::Label l1;
a.label(&l1);
a.add(A::x3, A::x2, 32);
a.cbz(A::x2, &l1); // This will jump backward... nothing sneaky.
A::Label l2; // Start off the same...
a.label(&l2);
a.add(A::x3, A::x2, 32);
a.cbz(A::x2, &l2); // Looks like this will go backward...
a.add(A::x2, A::x2, 4);
a.add(A::x3, A::x2, 32);
a.label(&l2); // But no... actually forward! What a switcheroo!
},{
0x43,0x80,0x00,0x91, // add x3, x2, #32
0xe2,0xff,0xff,0xb4, // cbz x2, #-4
0x43,0x80,0x00,0x91, // add x3, x2, #32
0x62,0x00,0x00,0xb4, // cbz x2, #12
0x42,0x10,0x00,0x91, // add x2, x2, #4
0x43,0x80,0x00,0x91, // add x3, x2, #32
});
// Loading from a label on ARM.
test_asm(r, [&](A& a) {
A::Label fore,aft;
a.label(&fore);
a.word(0x01234567);
a.ldrq(A::v1, &fore);
a.ldrq(A::v2, &aft);
a.label(&aft);
a.word(0x76543210);
},{
0x67,0x45,0x23,0x01,
0xe1,0xff,0xff,0x9c, // ldr q1, #-4
0x22,0x00,0x00,0x9c, // ldr q2, #4
0x10,0x32,0x54,0x76,
});
test_asm(r, [&](A& a) {
a.ldrq(A::v0, A::x8);
a.strq(A::v0, A::x8);
},{
0x00,0x01,0xc0,0x3d,
0x00,0x01,0x80,0x3d,
});
test_asm(r, [&](A& a) {
a.dup4s (A::v0, A::x8);
a.ld1r4s (A::v0, A::x8); // echo 'ld1r.4s {v0}, [x8]' | llvm-mc --show-encoding
a.ld1r8h (A::v0, A::x8);
a.ld1r16b(A::v0, A::x8);
},{
0x00,0x0d,0x04,0x4e,
0x00,0xc9,0x40,0x4d,
0x00,0xc5,0x40,0x4d,
0x00,0xc1,0x40,0x4d,
});
test_asm(r, [&](A& a) {
a.xtns2h(A::v0, A::v0);
a.xtnh2b(A::v0, A::v0);
a.strs (A::v0, A::x0);
a.ldrs (A::v0, A::x0);
a.uxtlb2h(A::v0, A::v0);
a.uxtlh2s(A::v0, A::v0);
a.uminv4s(A::v3, A::v4);
a.movs (A::x3, A::v4,0); // mov.s w3,v4[0]
a.movs (A::x3, A::v4,1); // mov.s w3,v4[1]
a.inss (A::v4, A::x3,3); // ins.s v4[3],w3
},{
0x00,0x28,0x61,0x0e,
0x00,0x28,0x21,0x0e,
0x00,0x00,0x00,0xbd,
0x00,0x00,0x40,0xbd,
0x00,0xa4,0x08,0x2f,
0x00,0xa4,0x10,0x2f,
0x83,0xa8,0xb1,0x6e,
0x83,0x3c,0x04,0x0e,
0x83,0x3c,0x0c,0x0e,
0x64,0x1c,0x1c,0x4e,
});
test_asm(r, [&](A& a) {
a.ldrb(A::v0, A::x8);
a.strb(A::v0, A::x8);
},{
0x00,0x01,0x40,0x3d,
0x00,0x01,0x00,0x3d,
});
test_asm(r, [&](A& a) {
a.ldrd(A::x0, A::x1, 3); // ldr x0, [x1, #24]
a.ldrs(A::x0, A::x1, 3); // ldr w0, [x1, #12]
a.ldrh(A::x0, A::x1, 3); // ldrh w0, [x1, #6]
a.ldrb(A::x0, A::x1, 3); // ldrb w0, [x1, #3]
a.strs(A::x0, A::x1, 3); // str w0, [x1, #12]
},{
0x20,0x0c,0x40,0xf9,
0x20,0x0c,0x40,0xb9,
0x20,0x0c,0x40,0x79,
0x20,0x0c,0x40,0x39,
0x20,0x0c,0x00,0xb9,
});
test_asm(r, [&](A& a) {
a.tbl (A::v0, A::v1, A::v2);
a.uzp14s(A::v0, A::v1, A::v2);
a.uzp24s(A::v0, A::v1, A::v2);
a.zip14s(A::v0, A::v1, A::v2);
a.zip24s(A::v0, A::v1, A::v2);
},{
0x20,0x00,0x02,0x4e,
0x20,0x18,0x82,0x4e,
0x20,0x58,0x82,0x4e,
0x20,0x38,0x82,0x4e,
0x20,0x78,0x82,0x4e,
});
}
DEF_TEST(SkVM_approx_math, r) {
auto eval = [](int N, float values[], auto fn) {
skvm::Builder b;
skvm::Arg inout = b.varying<float>();
b.storeF(inout, fn(&b, b.loadF(inout)));
b.done().eval(N, values);
};
auto compare = [r](int N, const float values[], const float expected[]) {
for (int i = 0; i < N; ++i) {
REPORTER_ASSERT(r, SkScalarNearlyEqual(values[i], expected[i], 0.001f));
}
};
// log2
{
float values[] = {0.25f, 0.5f, 1, 2, 4, 8};
constexpr int N = SK_ARRAY_COUNT(values);
eval(N, values, [](skvm::Builder* b, skvm::F32 v) {
return b->approx_log2(v);
});
const float expected[] = {-2, -1, 0, 1, 2, 3};
compare(N, values, expected);
}
// pow2
{
float values[] = {-2, -1, 0, 1, 2, 3};
constexpr int N = SK_ARRAY_COUNT(values);
eval(N, values, [](skvm::Builder* b, skvm::F32 v) {
return b->approx_pow2(v);
});
const float expected[] = {0.25f, 0.5f, 1, 2, 4, 8};
compare(N, values, expected);
}
// powf -- x^0.5
{
float bases[] = {0, 1, 4, 9, 16};
constexpr int N = SK_ARRAY_COUNT(bases);
eval(N, bases, [](skvm::Builder* b, skvm::F32 base) {
return b->approx_powf(base, b->splat(0.5f));
});
const float expected[] = {0, 1, 2, 3, 4};
compare(N, bases, expected);
}
// powf -- 3^x
{
float exps[] = {-2, -1, 0, 1, 2};
constexpr int N = SK_ARRAY_COUNT(exps);
eval(N, exps, [](skvm::Builder* b, skvm::F32 exp) {
return b->approx_powf(b->splat(3.0f), exp);
});
const float expected[] = {1/9.0f, 1/3.0f, 1, 3, 9};
compare(N, exps, expected);
}
auto test = [r](float arg, float expected, float tolerance, auto prog) {
skvm::Builder b;
skvm::Arg inout = b.varying<float>();
b.storeF(inout, prog(b.loadF(inout)));
float actual = arg;
b.done().eval(1, &actual);
float err = std::abs(actual - expected);
if (err > tolerance) {
// SkDebugf("arg %g, expected %g, actual %g\n", arg, expected, actual);
REPORTER_ASSERT(r, true);
}
return err;
};
auto test2 = [r](float arg0, float arg1, float expected, float tolerance, auto prog) {
skvm::Builder b;
skvm::Arg in0 = b.varying<float>();
skvm::Arg in1 = b.varying<float>();
skvm::Arg out = b.varying<float>();
b.storeF(out, prog(b.loadF(in0), b.loadF(in1)));
float actual;
b.done().eval(1, &arg0, &arg1, &actual);
float err = std::abs(actual - expected);
if (err > tolerance) {
// SkDebugf("[%g, %g]: expected %g, actual %g\n", arg0, arg1, expected, actual);
REPORTER_ASSERT(r, true);
}
return err;
};
// sine, cosine, tangent
{
constexpr float P = SK_ScalarPI;
constexpr float tol = 0.00175f;
for (float rad = -5*P; rad <= 5*P; rad += 0.1f) {
test(rad, sk_float_sin(rad), tol, [](skvm::F32 x) {
return approx_sin(x);
});
test(rad, sk_float_cos(rad), tol, [](skvm::F32 x) {
return approx_cos(x);
});
}
// Our tangent diverge more as we get near infinities (x near +- Pi/2),
// so bring in the domain a little.
constexpr float eps = 0.16f;
float err = 0;
for (float rad = -P/2 + eps; rad <= P/2 - eps; rad += 0.01f) {
err += test(rad, sk_float_tan(rad), tol, [](skvm::F32 x) {
return approx_tan(x);
});
// try again with some multiples of P, to check our periodicity
test(rad, sk_float_tan(rad), tol, [=](skvm::F32 x) {
return approx_tan(x + 3*P);
});
test(rad, sk_float_tan(rad), tol, [=](skvm::F32 x) {
return approx_tan(x - 3*P);
});
}
if (0) { SkDebugf("tan error %g\n", err); }
}
// asin, acos, atan
{
constexpr float tol = 0.00175f;
float err = 0;
for (float x = -1; x <= 1; x += 1.0f/64) {
err += test(x, asin(x), tol, [](skvm::F32 x) {
return approx_asin(x);
});
test(x, acos(x), tol, [](skvm::F32 x) {
return approx_acos(x);
});
}
if (0) { SkDebugf("asin error %g\n", err); }
err = 0;
for (float x = -10; x <= 10; x += 1.0f/16) {
err += test(x, atan(x), tol, [](skvm::F32 x) {
return approx_atan(x);
});
}
if (0) { SkDebugf("atan error %g\n", err); }
for (float y = -3; y <= 3; y += 1) {
for (float x = -3; x <= 3; x += 1) {
err += test2(y, x, atan2(y,x), tol, [](skvm::F32 y, skvm::F32 x) {
return approx_atan2(y,x);
});
}
}
if (0) { SkDebugf("atan2 error %g\n", err); }
}
}
DEF_TEST(SkVM_min_max, r) {
// min() and max() have subtle behavior when one argument is NaN and
// the other isn't. It's not sound to blindly swap their arguments.
//
// All backends must behave like std::min() and std::max(), which are
//
// min(x,y) = y<x ? y : x
// max(x,y) = x<y ? y : x
// ±NaN, ±0, ±1, ±inf
const uint32_t bits[] = {0x7f80'0001, 0xff80'0001, 0x0000'0000, 0x8000'0000,
0x3f80'0000, 0xbf80'0000, 0x7f80'0000, 0xff80'0000};
float f[8];
memcpy(f, bits, sizeof(bits));
auto identical = [&](float x, float y) {
uint32_t X,Y;
memcpy(&X, &x, 4);
memcpy(&Y, &y, 4);
return X == Y;
};
// Test min/max with non-constant x, non-constant y.
// (Whether x and y are varying or uniform shouldn't make any difference.)
{
skvm::Builder b;
{
skvm::Arg src = b.varying<float>(),
mn = b.varying<float>(),
mx = b.varying<float>();
skvm::F32 x = b.loadF(src),
y = b.uniformF(b.uniform(), 0);
b.storeF(mn, b.min(x,y));
b.storeF(mx, b.max(x,y));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
float mn[8], mx[8];
for (int i = 0; i < 8; i++) {
// min() and max() everything with f[i].
program.eval(8, f,mn,mx, &f[i]);
for (int j = 0; j < 8; j++) {
REPORTER_ASSERT(r, identical(mn[j], std::min(f[j], f[i])));
REPORTER_ASSERT(r, identical(mx[j], std::max(f[j], f[i])));
}
}
});
}
// Test each with constant on the right.
for (int i = 0; i < 8; i++) {
skvm::Builder b;
{
skvm::Arg src = b.varying<float>(),
mn = b.varying<float>(),
mx = b.varying<float>();
skvm::F32 x = b.loadF(src),
y = b.splat(f[i]);
b.storeF(mn, b.min(x,y));
b.storeF(mx, b.max(x,y));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
float mn[8], mx[8];
program.eval(8, f,mn,mx);
for (int j = 0; j < 8; j++) {
REPORTER_ASSERT(r, identical(mn[j], std::min(f[j], f[i])));
REPORTER_ASSERT(r, identical(mx[j], std::max(f[j], f[i])));
}
});
}
// Test each with constant on the left.
for (int i = 0; i < 8; i++) {
skvm::Builder b;
{
skvm::Arg src = b.varying<float>(),
mn = b.varying<float>(),
mx = b.varying<float>();
skvm::F32 x = b.splat(f[i]),
y = b.loadF(src);
b.storeF(mn, b.min(x,y));
b.storeF(mx, b.max(x,y));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
float mn[8], mx[8];
program.eval(8, f,mn,mx);
for (int j = 0; j < 8; j++) {
REPORTER_ASSERT(r, identical(mn[j], std::min(f[i], f[j])));
REPORTER_ASSERT(r, identical(mx[j], std::max(f[i], f[j])));
}
});
}
}
DEF_TEST(SkVM_halfs, r) {
const uint16_t hs[] = {0x0000,0x3800,0x3c00,0x4000,
0xc400,0xb800,0xbc00,0xc000};
const float fs[] = {+0.0f,+0.5f,+1.0f,+2.0f,
-4.0f,-0.5f,-1.0f,-2.0f};
{
skvm::Builder b;
skvm::Arg src = b.varying<uint16_t>(),
dst = b.varying<float>();
b.storeF(dst, b.from_fp16(b.load16(src)));
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
float dst[8];
program.eval(8, hs, dst);
for (int i = 0; i < 8; i++) {
REPORTER_ASSERT(r, dst[i] == fs[i]);
}
});
}
{
skvm::Builder b;
skvm::Arg src = b.varying<float>(),
dst = b.varying<uint16_t>();
b.store16(dst, b.to_fp16(b.loadF(src)));
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
uint16_t dst[8];
program.eval(8, fs, dst);
for (int i = 0; i < 8; i++) {
REPORTER_ASSERT(r, dst[i] == hs[i]);
}
});
}
}
DEF_TEST(SkVM_64bit, r) {
uint32_t lo[65],
hi[65];
uint64_t wide[65];
for (int i = 0; i < 65; i++) {
lo[i] = 2*i+0;
hi[i] = 2*i+1;
wide[i] = ((uint64_t)lo[i] << 0)
| ((uint64_t)hi[i] << 32);
}
{
skvm::Builder b;
{
skvm::Arg wide = b.varying<uint64_t>(),
lo = b.varying<int>(),
hi = b.varying<int>();
b.store32(lo, b.load64(wide, 0));
b.store32(hi, b.load64(wide, 1));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
uint32_t l[65], h[65];
program.eval(65, wide,l,h);
for (int i = 0; i < 65; i++) {
REPORTER_ASSERT(r, l[i] == lo[i]);
REPORTER_ASSERT(r, h[i] == hi[i]);
}
});
}
{
skvm::Builder b;
{
skvm::Arg wide = b.varying<uint64_t>(),
lo = b.varying<int>(),
hi = b.varying<int>();
b.store64(wide, b.load32(lo), b.load32(hi));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
uint64_t w[65];
program.eval(65, w,lo,hi);
for (int i = 0; i < 65; i++) {
REPORTER_ASSERT(r, w[i] == wide[i]);
}
});
}
}
DEF_TEST(SkVM_128bit, r) {
float floats[4*63];
uint8_t packed[4*63];
for (int i = 0; i < 4*63; i++) {
floats[i] = i * (1/255.0f);
}
skvm::PixelFormat rgba_ffff,
rgba_8888;
skvm::SkColorType_to_PixelFormat(kRGBA_F32_SkColorType , &rgba_ffff);
skvm::SkColorType_to_PixelFormat(kRGBA_8888_SkColorType, &rgba_8888);
{ // Convert RGBA F32 to RGBA 8888, testing 128-bit loads.
skvm::Builder b;
{
skvm::Arg dst = b.arg( 4),
src = b.arg(16);
skvm::Color c = b.load(rgba_ffff, src);
b.store(rgba_8888, dst, c);
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
memset(packed, 0, sizeof(packed));
program.eval(63, packed, floats);
for (int i = 0; i < 4*63; i++) {
REPORTER_ASSERT(r, packed[i] == i);
}
});
}
{ // Convert RGBA 8888 to RGBA F32, testing 128-bit stores.
skvm::Builder b;
{
skvm::Arg dst = b.arg(16),
src = b.arg( 4);
skvm::Color c = b.load(rgba_8888, src);
b.store(rgba_ffff, dst, c);
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
memset(floats, 0, sizeof(floats));
program.eval(63, floats, packed);
for (int i = 0; i < 4*63; i++) {
REPORTER_ASSERT(r, floats[i] == i * (1/255.0f));
}
});
}
}
DEF_TEST(SkVM_is_NaN_is_finite, r) {
skvm::Builder b;
{
skvm::Arg src = b.varying<float>(),
nan = b.varying<int>(),
fin = b.varying<int>();
b.store32(nan, is_NaN (b.loadF(src)));
b.store32(fin, is_finite(b.loadF(src)));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
// ±NaN, ±0, ±1, ±inf
const uint32_t bits[] = {0x7f80'0001, 0xff80'0001, 0x0000'0000, 0x8000'0000,
0x3f80'0000, 0xbf80'0000, 0x7f80'0000, 0xff80'0000};
uint32_t nan[8], fin[8];
program.eval(8, bits, nan,fin);
for (int i = 0; i < 8; i++) {
REPORTER_ASSERT(r, nan[i] == ((i == 0 || i == 1) ? 0xffffffff : 0));
REPORTER_ASSERT(r, fin[i] == ((i == 2 || i == 3 ||
i == 4 || i == 5) ? 0xffffffff : 0));
}
});
}
DEF_TEST(SkVM_args, r) {
// Test we can handle at least six arguments.
skvm::Builder b;
{
skvm::Arg dst = b.varying<float>(),
A = b.varying<float>(),
B = b.varying<float>(),
C = b.varying<float>(),
D = b.varying<float>(),
E = b.varying<float>();
storeF(dst, b.loadF(A)
+ b.loadF(B)
+ b.loadF(C)
+ b.loadF(D)
+ b.loadF(E));
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
float dst[17],A[17],B[17],C[17],D[17],E[17];
for (int i = 0; i < 17; i++) {
A[i] = B[i] = C[i] = D[i] = E[i] = (float)i;
}
program.eval(17, dst,A,B,C,D,E);
for (int i = 0; i < 17; i++) {
REPORTER_ASSERT(r, dst[i] == 5.0f*i);
}
});
}
DEF_TEST(SkVM_badpack, r) {
// Test case distilled from actual failing draw,
// originally with a bad arm64 implementation of pack().
skvm::Builder p;
{
skvm::Arg uniforms = p.uniform(),
dst = p.varying<uint16_t>();
skvm::I32 r = round(p.uniformF(uniforms, 8) * 15),
a = p.splat(0xf);
skvm::I32 _4444 = p.splat(0);
_4444 = pack(_4444, r, 12);
_4444 = pack(_4444, a, 0);
store16(dst, _4444);
}
test_jit_and_interpreter(p.done(), [&](const skvm::Program& program){
const float uniforms[] = { 0.0f, 0.0f,
1.0f, 0.0f, 0.0f, 1.0f };
uint16_t dst[17] = {0};
program.eval(17, uniforms,dst);
for (int i = 0; i < 17; i++) {
REPORTER_ASSERT(r, dst[i] == 0xf00f, "got %04x, want %04x\n", dst[i], 0xf00f);
}
});
}
DEF_TEST(SkVM_features, r) {
auto build_program = [](skvm::Builder* b) {
skvm::F32 x = b->loadF(b->varying<float>());
b->storeF(b->varying<float>(), x*x+x);
};
{ // load-fma-store with FMA available.
skvm::Features features;
features.fma = true;
skvm::Builder b(features);
build_program(&b);
REPORTER_ASSERT(r, b.optimize().size() == 3);
}
{ // load-mul-add-store without FMA.
skvm::Features features;
features.fma = false;
skvm::Builder b(features);
build_program(&b);
REPORTER_ASSERT(r, b.optimize().size() == 4);
}
{ // Auto-detected, could be either.
skvm::Builder b;
build_program(&b);
REPORTER_ASSERT(r, b.optimize().size() == 3
|| b.optimize().size() == 4);
}
}
DEF_TEST(SkVM_gather_can_hoist, r) {
// A gather instruction isn't necessarily varying... it's whatever its index is.
// First a typical gather scenario with varying index.
{
skvm::Builder b;
skvm::Arg uniforms = b.uniform(),
buf = b.varying<int>();
skvm::I32 ix = b.load32(buf);
b.store32(buf, b.gather32(uniforms,0, ix));
skvm::Program p = b.done();
// ix is varying, so the gather is too.
//
// loop:
// v0 = load32 buf
// v1 = gather32 uniforms+0 v0
// store32 buf v1
REPORTER_ASSERT(r, p.instructions().size() == 3);
REPORTER_ASSERT(r, p.loop() == 0);
}
// Now the same but with a uniform index instead.
{
skvm::Builder b;
skvm::Arg uniforms = b.uniform(),
buf = b.varying<int>();
skvm::I32 ix = b.uniform32(uniforms,8);
b.store32(buf, b.gather32(uniforms,0, ix));
skvm::Program p = b.done();
// ix is uniform, so the gather is too.
//
// v0 = uniform32 uniforms+8
// v1 = gather32 uniforms+0 v0
// loop:
// store32 buf v1
REPORTER_ASSERT(r, p.instructions().size() == 3);
REPORTER_ASSERT(r, p.loop() == 2);
}
}
DEF_TEST(SkVM_dont_dedup_loads, r) {
// We've been assuming that all Ops with the same arguments produce the same value
// and deduplicating them, which results in a simple common subexpression eliminator.
//
// But we can't soundly dedup two identical loads with a store between.
// If we dedup the loads in this test program it will always increment by 1, not K.
constexpr int K = 2;
skvm::Builder b;
{
skvm::Arg buf = b.varying<int>();
for (int i = 0; i < K; i++) {
b.store32(buf, b.load32(buf) + 1);
}
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
int buf[] = { 0,1,2,3,4 };
program.eval(SK_ARRAY_COUNT(buf), buf);
for (int i = 0; i < (int)SK_ARRAY_COUNT(buf); i++) {
REPORTER_ASSERT(r, buf[i] == i+K);
}
});
}
DEF_TEST(SkVM_dont_dedup_stores, r) {
// Following a similar line of reasoning to SkVM_dont_dedup_loads,
// we cannot dedup stores either. A different store between two identical stores
// will invalidate the first store, meaning we do need to reissue that store operation.
skvm::Builder b;
{
skvm::Arg buf = b.varying<int>();
b.store32(buf, b.splat(4));
b.store32(buf, b.splat(5));
b.store32(buf, b.splat(4)); // If we dedup'd, we'd skip this store.
}
test_jit_and_interpreter(b.done(), [&](const skvm::Program& program){
int buf[42];
program.eval(SK_ARRAY_COUNT(buf), buf);
for (int x : buf) {
REPORTER_ASSERT(r, x == 4);
}
});
}
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