zig/std/math/x86_64/sqrt.zig

pub fn sqrt32(x: f32) f32 {
    return asm (
        \\sqrtss %%xmm0, %%xmm0
        : [ret] "={xmm0}" (-> f32)
        : [x] "{xmm0}" (x)
    );
}

pub fn sqrt64(x: f64) f64 {
    return asm (
        \\sqrtsd %%xmm0, %%xmm0
        : [ret] "={xmm0}" (-> f64)
        : [x] "{xmm0}" (x)
    );
}
syntax: functions require return type. remove `->` The purpose of this is: * Only one way to do things * Changing a function with void return type to return a possible error becomes a 1 character change, subtly encouraging people to use errors. See #632 Here are some imperfect sed commands for performing this update: remove arrow: ``` sed -i 's/\(\bfn\b.\)-> /\1/g' $(find . -name ".zig") ``` add void: ``` sed -i 's/\(\bfn\b.\))\s{/\1) void {/g' $(find ../ -name "*.zig") ``` Some cleanup may be necessary, but this should do the bulk of the work. 2018-01-25 17:10:11 +08:00			`pub fn sqrt32(x: f32) f32 {`
Add hw sqrt for x86_64 2018-01-10 14:53:36 +08:00			`return asm (`
			`\\sqrtss %%xmm0, %%xmm0`
			`: [ret] "={xmm0}" (-> f32)`
			`: [x] "{xmm0}" (x)`
			`);`
			`}`

syntax: functions require return type. remove `->` The purpose of this is: * Only one way to do things * Changing a function with void return type to return a possible error becomes a 1 character change, subtly encouraging people to use errors. See #632 Here are some imperfect sed commands for performing this update: remove arrow: ``` sed -i 's/\(\bfn\b.\)-> /\1/g' $(find . -name ".zig") ``` add void: ``` sed -i 's/\(\bfn\b.\))\s{/\1) void {/g' $(find ../ -name "*.zig") ``` Some cleanup may be necessary, but this should do the bulk of the work. 2018-01-25 17:10:11 +08:00			`pub fn sqrt64(x: f64) f64 {`
Add hw sqrt for x86_64 2018-01-10 14:53:36 +08:00			`return asm (`
			`\\sqrtsd %%xmm0, %%xmm0`
			`: [ret] "={xmm0}" (-> f64)`
			`: [x] "{xmm0}" (x)`
			`);`
			`}`