Add int to float conversions

src/basic/math/convert_i16_expsign_to_FAC1.s

@@ -0,0 +1,24 @@
+;; #LAYOUT# STD *       #TAKE
+;; #LAYOUT# *   BASIC_0 #TAKE
+;; #LAYOUT# *   *       #IGNORE
+
+;
+; Math package - convert i16 with exponent in X and sign in C to FAC1
+
+convert_i16_expsign_to_FAC1:
+
+    lda #$00                    
+    sta FAC1_mantissa+2         ; Clear high bytes of mantissa
+    sta FAC1_mantissa+3
+    stx FAC1_exponent
+    sta FAC1_sign
+    bcs @1
+
+    ; Handle signed int
+    lda FAC1_mantissa+1          ; Clear sign bit of int 16
+    and #$7F
+    sta FAC1_mantissa+1
+    ldy #>CONST_NEG_32768       ; Subtract with 32768 to invert negative number
+    lda #<CONST_NEG_32768
+    jsr add_MEM_FAC1
+@1: jmp normal_FAC1