Syntax
addg $s_reg1, $s_reg2, $d_reg
addg $d_reg/$s_reg1, $s_reg2
Description
Add G_floating adds the contents of $s_reg1 or $d_reg to the contents of $s_reg2 and places the result in $d_reg. When the sum of two operands is exactly 0, the sum has a positive sign for all rounding modes except round toward minus infinity (–¥). For that rounding mode, the sum has a negative sign.
Qualifiers
The following table describes the qualifiers for the addg instructions:
| Instruction | Qualifier description |
| no qualifier | VAX Rounding Mode: Normal rounding |
| VAX Trap Mode: Imprecise, underflow disabled | |
| addgc | VAX Rounding Mode: Chopped |
| addgu | VAX Trap Mode: Imprecise, underflow enabled |
| addguc | Combined meanings of addgc and addgu |
| addgs | VAX Trap Mode: Software, underflow disabled |
| addgsc | Combined meanings of addgs and addgc |
| addgsu | VAX Trap Mode: Software, underflow enabled |
| addgsuc | Combined meanings of addgs and addguc |