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fn to-km miles: float -> _/xmm1: float {
var result/xmm1: float <- copy miles
# fill in the blanks to compute miles * 1.609
# 1.609 = 1609 / 1000 (use function `rational`)
return result
}
fn test-to-km {
# 0 miles = 0 km
var zero: float # Mu implicitly initializes variables in memory to 0
var result/xmm1: float <- to-km zero
compare result, zero
{
break-if-=
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "F - 0 miles = 0 km\n", 3/fg 0/bg
count-test-failure
}
# 1 mile = 1.609 km approximately
var one/eax: int <- copy 1
var one-float/xmm0: float <- convert one
result <- to-km one-float
var lower-bound/xmm0: float <- rational 0x649, 0x3e8 # 1609/1000 in hex
{
compare result, lower-bound
break-if-float>=
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "F - 1 mile > 1.609 km\n", 3/fg 0/bg
count-test-failure
}
var upper-bound/xmm0: float <- rational 0x64a, 0x3e8 # 1610/1000 in hex
{
compare result, upper-bound
break-if-float<=
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "F - 1 mile < 1.610 km\n", 3/fg 0/bg
count-test-failure
}
# 2 miles = 3.218 km approximately
var two/eax: int <- copy 2
var two-float/xmm0: float <- convert two
result <- to-km two-float
var lower-bound/xmm0: float <- rational 0xc92, 0x3e8 # 3218/1000 in hex
{
compare result, lower-bound
break-if-float>=
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "F - 2 miles > 3.218 km\n", 3/fg 0/bg
count-test-failure
}
var upper-bound/xmm0: float <- rational 0xc93, 0x3e8 # 3219/1000 in hex
{
compare result, upper-bound
break-if-float<=
draw-text-wrapping-right-then-down-from-cursor-over-full-screen 0/screen, "F - 2 miles < 3.219 km\n", 3/fg 0/bg
count-test-failure
}
}
fn main {
}
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