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translate-c: Add support for vector expressions

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Includes vector types, __builtin_shufflevector, and __builtin_convertvector
This commit is contained in:
Evan Haas
2021-03-08 07:01:19 -08:00
committed by Andrew Kelley
parent 38d8aab4d2
commit 8de14a98a6
7 changed files with 515 additions and 8 deletions
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102
test/run_translated_c.zig
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@@ -1308,4 +1308,106 @@ pub fn addCases(cases: *tests.RunTranslatedCContext) void {
\\ ufoo = (uval += 100000000); // compile error if @truncate() not inserted
\\}
, "");
cases.add("basic vector expressions",
\\#include <stdlib.h>
\\#include <stdint.h>
\\typedef int16_t __v8hi __attribute__((__vector_size__(16)));
\\int main(int argc, char**argv) {
\\ __v8hi uninitialized;
\\ __v8hi empty_init = {};
\\ __v8hi partial_init = {0, 1, 2, 3};
\\
\\ __v8hi a = {0, 1, 2, 3, 4, 5, 6, 7};
\\ __v8hi b = (__v8hi) {100, 200, 300, 400, 500, 600, 700, 800};
\\
\\ __v8hi sum = a + b;
\\ for (int i = 0; i < 8; i++) {
\\ if (sum[i] != a[i] + b[i]) abort();
\\ }
\\ return 0;
\\}
, "");
cases.add("__builtin_shufflevector",
\\#include <stdlib.h>
\\#include <stdint.h>
\\typedef int16_t __v4hi __attribute__((__vector_size__(8)));
\\typedef int16_t __v8hi __attribute__((__vector_size__(16)));
\\int main(int argc, char**argv) {
\\ __v8hi v8_a = {0, 1, 2, 3, 4, 5, 6, 7};
\\ __v8hi v8_b = {100, 200, 300, 400, 500, 600, 700, 800};
\\ __v8hi shuffled = __builtin_shufflevector(v8_a, v8_b, 0, 1, 2, 3, 8, 9, 10, 11);
\\ for (int i = 0; i < 8; i++) {
\\ if (i < 4) {
\\ if (shuffled[i] != v8_a[i]) abort();
\\ } else {
\\ if (shuffled[i] != v8_b[i - 4]) abort();
\\ }
\\ }
\\ shuffled = __builtin_shufflevector(
\\ (__v8hi) {-1, -1, -1, -1, -1, -1, -1, -1},
\\ (__v8hi) {42, 42, 42, 42, 42, 42, 42, 42},
\\ 0, 1, 2, 3, 8, 9, 10, 11
\\ );
\\ for (int i = 0; i < 8; i++) {
\\ if (i < 4) {
\\ if (shuffled[i] != -1) abort();
\\ } else {
\\ if (shuffled[i] != 42) abort();
\\ }
\\ }
\\ __v4hi shuffled_to_fewer_elements = __builtin_shufflevector(v8_a, v8_b, 0, 1, 8, 9);
\\ for (int i = 0; i < 4; i++) {
\\ if (i < 2) {
\\ if (shuffled_to_fewer_elements[i] != v8_a[i]) abort();
\\ } else {
\\ if (shuffled_to_fewer_elements[i] != v8_b[i - 2]) abort();
\\ }
\\ }
\\ __v4hi v4_a = {0, 1, 2, 3};
\\ __v4hi v4_b = {100, 200, 300, 400};
\\ __v8hi shuffled_to_more_elements = __builtin_shufflevector(v4_a, v4_b, 0, 1, 2, 3, 4, 5, 6, 7);
\\ for (int i = 0; i < 4; i++) {
\\ if (shuffled_to_more_elements[i] != v4_a[i]) abort();
\\ if (shuffled_to_more_elements[i + 4] != v4_b[i]) abort();
\\ }
\\ return 0;
\\}
, "");
cases.add("__builtin_convertvector",
\\#include <stdlib.h>
\\#include <stdint.h>
\\typedef int16_t __v8hi __attribute__((__vector_size__(16)));
\\typedef uint16_t __v8hu __attribute__((__vector_size__(16)));
\\int main(int argc, char**argv) {
\\ __v8hi signed_vector = { 1, 2, 3, 4, -1, -2, -3,-4};
\\ __v8hu unsigned_vector = __builtin_convertvector(signed_vector, __v8hu);
\\
\\ for (int i = 0; i < 8; i++) {
\\ if (unsigned_vector[i] != (uint16_t)signed_vector[i]) abort();
\\ }
\\ return 0;
\\}
, "");
cases.add("vector casting",
\\#include <stdlib.h>
\\#include <stdint.h>
\\typedef int8_t __v8qi __attribute__((__vector_size__(8)));
\\typedef uint8_t __v8qu __attribute__((__vector_size__(8)));
\\int main(int argc, char**argv) {
\\ __v8qi signed_vector = { 1, 2, 3, 4, -1, -2, -3,-4};
\\
\\ uint64_t big_int = (uint64_t) signed_vector;
\\ if (big_int != 0x01020304FFFEFDFCULL && big_int != 0xFCFDFEFF04030201ULL) abort();
\\ __v8qu unsigned_vector = (__v8qu) big_int;
\\ for (int i = 0; i < 8; i++) {
\\ if (unsigned_vector[i] != (uint8_t)signed_vector[i] && unsigned_vector[i] != (uint8_t)signed_vector[7 - i]) abort();
\\ }
\\ return 0;
\\}
, "");
}