Implement sin, cos, tan and sincos for Math (AssemblyScript#806)

Author: MaxGraey

std/assembly/math.ts

@@ -161,17 +161,16 @@
   i32.sub
   local.get $5
   i32.add
-  local.tee $1
   f64.convert_i32_s
+  local.tee $0
   f64.const 1.9082149292705877e-10
   f64.mul
   f64.add
   local.get $4
   f64.sub
   local.get $3
   f64.add
-  local.get $1
-  f64.convert_i32_s
+  local.get $0
   f64.const 0.6931471803691238
   f64.mul
   f64.add

tests/compiler/mandelbrot.optimized.wat

@@ -20,7 +20,7 @@
   (local $9 f64)
   (local $10 f64)
   (local $11 f64)
-  (local $12 i32)
+  (local $12 f64)
   local.get $0
   i64.reinterpret_f64
   local.set $1
@@ -197,14 +197,14 @@
   f64.add
   local.set $11
   local.get $3
+  f64.convert_i32_s
   local.set $12
   local.get $6
   local.get $5
   local.get $11
   f64.add
   f64.mul
   local.get $12
-  f64.convert_i32_s
   f64.const 1.9082149292705877e-10
   f64.mul
   f64.add
@@ -213,7 +213,6 @@
   local.get $4
   f64.add
   local.get $12
-  f64.convert_i32_s
   f64.const 0.6931471803691238
   f64.mul
   f64.add

tests/compiler/mandelbrot.untouched.wat

@@ -4188,7 +4188,7 @@
   if
    i32.const 0
    i32.const 3160
-   i32.const 1041
+   i32.const 1369
    i32.const 4
    call $~lib/builtins/abort
    unreachable
@@ -5724,7 +5724,7 @@
   if
    i32.const 3936
    i32.const 3160
-   i32.const 1048
+   i32.const 1376
    i32.const 24
    call $~lib/builtins/abort
    unreachable

tests/compiler/std/array.optimized.wat

@@ -6574,7 +6574,7 @@
   if
    i32.const 0
    i32.const 3160
-   i32.const 1041
+   i32.const 1369
    i32.const 4
    call $~lib/builtins/abort
    unreachable
@@ -8865,7 +8865,7 @@
   if
    i32.const 3936
    i32.const 3160
-   i32.const 1048
+   i32.const 1376
    i32.const 24
    call $~lib/builtins/abort
    unreachable