f64 values off the stack, gives the sign of the second one (either plus or minus) to the first
value, and then pushes it back on to the stack. If the second value is negative then this makes sure the first value is
also negative and pushes the result onto the stack.
f64.copysign
| f64 | The value to have its sign reset if required. |
| f64 | The value sign the result must have. |
| f64 | The first value with the sign that matches the second value. |
;; Push the f64 value 3.142 onto the stack f64.const 3.142 ;; Push the f64 value 2.718 onto the stack f64.const 2.718 ;; Pop the two f64 values off the stack, copy the sign part ;; and push it back onto the stack f64.copysign ;; The stack contains an f64 value of 3.142
;; Push the f64 value -3.142 onto the stack f64.const -3.142 ;; Push the f64 value 2.718 onto the stack f64.const 2.718 ;; Pop the two f64 values off the stack, copy the sign part ;; and push it back onto the stack f64.copysign ;; The stack contains an f64 value of 3.142
;; Push the f64 value 3.142 onto the stack f64.const 3.142 ;; Push the f64 value -2.718 onto the stack f64.const -2.718 ;; Pop the two f64 values off the stack, copy the sign part ;; and push it back onto the stack f64.copysign ;; The stack contains an f64 value of -3.142
;; Push the f64 value -3.142 onto the stack f64.const -3.142 ;; Push the f64 value -2.718 onto the stack f64.const -2.718 ;; Pop the two f64 values off the stack, copy the sign part ;; and push it back onto the stack f64.copysign ;; The stack contains an f64 value of -3.142