76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
#include <gtest/gtest.h>
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#include "uint256_t.h"
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TEST(BitShift, right){
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// operator>>
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uint256_t val(0xffffffffffffffffULL);
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uint64_t exp = 0xffffffffffffffffULL;
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for(uint8_t i = 0; i < 64; i++){
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EXPECT_EQ(val >> i, exp >> i);
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}
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uint256_t zero(0);
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for(uint8_t i = 0; i < 64; i++){
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EXPECT_EQ(zero >> i, 0);
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}
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// operator>>=
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for(uint8_t i = 0; i < 64; i++){
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EXPECT_EQ(val >>= 1, exp >>= 1);
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}
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for(uint8_t i = 0; i < 64; i++){
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EXPECT_EQ(zero >>= 1, 0);
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}
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}
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TEST(External, shift_right){
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bool t = true;
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bool f = false;
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uint8_t u8 = 0xffULL;
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uint16_t u16 = 0xffffULL;
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uint32_t u32 = 0xffffffffULL;
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uint64_t u64 = 0xffffffffffffffffULL;
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const uint256_t zero(0);
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const uint256_t one(1);
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EXPECT_EQ(t >> zero, one);
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EXPECT_EQ(f >> zero, zero);
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EXPECT_EQ(u8 >> zero, u8);
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EXPECT_EQ(u16 >> zero, u16);
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EXPECT_EQ(u32 >> zero, u32);
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EXPECT_EQ(u64 >> zero, u64);
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EXPECT_EQ(t >>= zero, t);
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EXPECT_EQ(f >>= zero, f);
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EXPECT_EQ(u8 >>= zero, u8);
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EXPECT_EQ(u16 >>= zero, u16);
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EXPECT_EQ(u32 >>= zero, u32);
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EXPECT_EQ(u64 >>= zero, u64);
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EXPECT_EQ(t >> one, uint256_t(t) >> 1);
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EXPECT_EQ(f >> one, uint256_t(f) >> 1);
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EXPECT_EQ(u8 >> one, uint256_t(u8) >> 1);
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EXPECT_EQ(u16 >> one, uint256_t(u16) >> 1);
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EXPECT_EQ(u32 >> one, uint256_t(u32) >> 1);
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EXPECT_EQ(u64 >> one, uint256_t(u64) >> 1);
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EXPECT_EQ(t >>= one, false);
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EXPECT_EQ(f >>= one, false);
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EXPECT_EQ(u8 >>= one, (uint8_t) 0x7fULL);
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EXPECT_EQ(u16 >>= one, (uint16_t) 0x7fffULL);
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EXPECT_EQ(u32 >>= one, (uint32_t) 0x7fffffffULL);
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EXPECT_EQ(u64 >>= one, (uint64_t) 0x7fffffffffffffffULL);
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EXPECT_EQ(u8 >> uint256_t(7), zero);
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EXPECT_EQ(u16 >> uint256_t(15), zero);
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EXPECT_EQ(u32 >> uint256_t(31), zero);
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EXPECT_EQ(u64 >> uint256_t(63), zero);
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EXPECT_EQ(u8 >>= uint256_t(7), (uint8_t) 0);
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EXPECT_EQ(u16 >>= uint256_t(15), (uint16_t) 0);
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EXPECT_EQ(u32 >>= uint256_t(31), (uint32_t) 0);
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EXPECT_EQ(u64 >>= uint256_t(63), (uint64_t) 0);
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}
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