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[libc] Initialize rand for fma tests #88055

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Merged
merged 1 commit into from
Apr 9, 2024
Merged

[libc] Initialize rand for fma tests #88055

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2 changes: 2 additions & 0 deletions libc/test/src/math/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -1271,6 +1271,7 @@ add_fp_unittest(
DEPENDS
libc.src.math.fmaf
libc.src.stdlib.rand
libc.src.stdlib.srand
libc.src.__support.FPUtil.fp_bits
FLAGS
FMA_OPT__ONLY
Expand All @@ -1286,6 +1287,7 @@ add_fp_unittest(
DEPENDS
libc.src.math.fma
libc.src.stdlib.rand
libc.src.stdlib.srand
libc.src.__support.FPUtil.fp_bits
)

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3 changes: 3 additions & 0 deletions libc/test/src/math/FmaTest.h
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Expand Up @@ -11,6 +11,7 @@

#include "src/__support/FPUtil/FPBits.h"
#include "src/stdlib/rand.h"
#include "src/stdlib/srand.h"
#include "test/UnitTest/FPMatcher.h"
#include "test/UnitTest/Test.h"
#include "utils/MPFRWrapper/MPFRUtils.h"
Expand Down Expand Up @@ -76,6 +77,7 @@ class FmaTestTemplate : public LIBC_NAMESPACE::testing::Test {
void test_subnormal_range(Func func) {
constexpr StorageType COUNT = 100'001;
constexpr StorageType STEP = (MAX_SUBNORMAL - MIN_SUBNORMAL) / COUNT;
LIBC_NAMESPACE::srand(1);
for (StorageType v = MIN_SUBNORMAL, w = MAX_SUBNORMAL;
v <= MAX_SUBNORMAL && w >= MIN_SUBNORMAL; v += STEP, w -= STEP) {
T x = FPBits(get_random_bit_pattern()).get_val(), y = FPBits(v).get_val(),
Expand All @@ -89,6 +91,7 @@ class FmaTestTemplate : public LIBC_NAMESPACE::testing::Test {
void test_normal_range(Func func) {
constexpr StorageType COUNT = 100'001;
constexpr StorageType STEP = (MAX_NORMAL - MIN_NORMAL) / COUNT;
LIBC_NAMESPACE::srand(1);
for (StorageType v = MIN_NORMAL, w = MAX_NORMAL;
v <= MAX_NORMAL && w >= MIN_NORMAL; v += STEP, w -= STEP) {
T x = FPBits(v).get_val(), y = FPBits(w).get_val(),
Expand Down