mirror/v
1
0
Fork 0
mirror of https://github.com/vlang/v.git synced 2023-08-10 21:13:21 +03:00
Code Issues Projects Releases Wiki Activity

cgen: operator overloading

Browse Source
This commit is contained in:
Alexander Medvednikov
2020-04-08 22:12:42 +02:00
parent 3521b7ff89
commit a08e64f37f
6 changed files with 85 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
vlib/math/bits/bits.v
View File

@ -271,11 +271,11 @@ pub fn len_16(x u16) int {
pub fn len_32(x u32) int {
mut y := x
mut n := 0
if y >= 1<<16 {
if y >= (1<<16) {
y >>= 16
n = 16
}
if y >= 1<<8 {
if y >= (1<<8) {
y >>= 8
n += 8
}

36
vlib/math/bits/bits_test.v
View File

@ -6,32 +6,32 @@ module bits
fn test_bits(){
mut i := 0
mut i1:= u64(0)
//
// --- LeadingZeros ---
//
// 8 bit
i = 1
for x in 0..8 {
//C.printf("x:%02x lz: %d cmp: %d\n", i << x, leading_zeros_8(i << x), 7-x)
assert leading_zeros_8(byte(i << x)) == 7 - x
}
// 16 bit
i = 1
for x in 0..16 {
//C.printf("x:%04x lz: %d cmp: %d\n", u16(i) << x, leading_zeros_16(u16(i) << x), 15-x)
assert leading_zeros_16(u16(i) << x) == 15 - x
}
// 32 bit
i = 1
for x in 0..32 {
//C.printf("x:%08x lz: %d cmp: %d\n", u32(i) << x, leading_zeros_32(u32(i) << x), 31-x)
assert leading_zeros_32(u32(i) << x) == 31 - x
}
// 64 bit
i = 1
for x in 0..64 {
@ -50,7 +50,7 @@ fn test_bits(){
assert ones_count_8(byte(i)) == x
i = (i << 1) + 1
}
// 16 bit
i = 0
for x in 0..17 {
@ -58,7 +58,7 @@ fn test_bits(){
assert ones_count_16(u16(i)) == x
i = (i << 1) + 1
}
// 32 bit
i = 0
for x in 0..33 {
@ -66,7 +66,7 @@ fn test_bits(){
assert ones_count_32(u32(i)) == x
i = (i << 1) + 1
}
// 64 bit
i1 = 0
for x in 0..65 {
@ -76,7 +76,7 @@ fn test_bits(){
}
//
// --- rotate_left/right ---
// --- rotate_left/right ---
//
assert rotate_left_8( 0x12 , 4) == 0x21
assert rotate_left_16( 0x1234 , 8) == 0x3412
@ -86,7 +86,7 @@ fn test_bits(){
//
// --- reverse ---
//
// 8 bit
i = 0
for x in 0..9 {
@ -102,7 +102,7 @@ fn test_bits(){
assert reverse_8(byte(i)) == rv
i = (i << 1) + 1
}
// 16 bit
i = 0
for x in 0..17 {
@ -118,7 +118,7 @@ fn test_bits(){
assert reverse_16(u16(i)) == rv
i = (i << 1) + 1
}
// 32 bit
i = 0
for x in 0..33 {
@ -134,7 +134,7 @@ fn test_bits(){
assert reverse_32(u32(i)) == rv
i = (i << 1) + 1
}
// 64 bit
i1 = 0
for x in 0..64 {
@ -190,7 +190,7 @@ fn test_bits(){
//
// --- sub ---
//
// 32 bit
i = 1
for x in 1..32 {
@ -202,7 +202,7 @@ fn test_bits(){
diff, borrow_out = sub_32(v0, v1, u32(1))
//C.printf("x:%08x [%llu,%llu] %08x\n", u32(i) << x, diff, borrow_out, v0 - v1)
assert diff == (v1 - 1)
assert diff == (v1 - 1)
assert borrow_out == u32(0)
diff, borrow_out = sub_32(v1, v0, u32(1))
@ -221,7 +221,7 @@ fn test_bits(){
diff, borrow_out = sub_64(v0, v1, u64(1))
//C.printf("x:%08x [%llu,%llu] %08x\n", u64(i) << x, diff, borrow_out, v0 - v1)
assert diff == (v1 - 1)
assert diff == (v1 - 1)
assert borrow_out == u64(0)
diff, borrow_out = sub_64(v1, v0, u64(1))
@ -236,7 +236,7 @@ fn test_bits(){
// 32 bit
i = 1
for x in 0..32 {
v0 := u32(i) << x
v0 := (u32(i) << x)
v1 := v0 - 1
hi, lo := mul_32(v0, v1)
//C.printf("x:%08x [%llu,%llu] %llu\n", v0, hi, lo, u64(v0 * v1))
@ -285,5 +285,5 @@ fn test_bits(){
assert rem == rem1
assert rem == rem_64(hi, lo, y)
}
}