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4.9 Branch Format Floating-Point Instructions
Alpha provides six floating conditional branch instructions. These
They do not interpret the bits tested in any way; specifically, they do not trap on
The test is based on the sign bit and whether the rest of the register is all zero bits. All 64 bits of the register are tested. The test is independent of the format of the operand in the register. Both plus and minus zero are equal to zero. A
The
Table
Mnemonic | Operation | Subset |
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FBEQ | Floating Branch Equal | Both |
FBGE | Floating Branch Greater Than or Equal | Both |
FBGT | Floating Branch Greater Than | Both |
FBLE | Floating Branch Less Than or Equal | Both |
FBLT | Floating Branch Less Than | Both |
FBNE | Floating Branch Not Equal | Both |
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Instruction Descriptions