4:352
Volume 4: Base IA-32 Instruction Reference
SBB—Integer Subtraction with Borrow
Description
Adds the source operand (second operand) and the carry (CF) flag, and subtracts the
result from the destination operand (first operand). The result of the subtraction is
stored in the destination operand. The destination operand can be a register or a
memory location; the source operand can be an immediate, a register, or a memory
location. The state of the CF flag represents a borrow from a previous subtraction.
When an immediate value is used as an operand, it is sign-extended to the length of
the destination operand format.
The SBB instruction does not distinguish between signed or unsigned operands.
Instead, the processor evaluates the result for both data types and sets the OF and CF
flags to indicate a borrow in the signed or unsigned result, respectively. The SF flag
indicates the sign of the signed result.
The SBB instruction is usually executed as part of a multibyte or multiword subtraction
in which a SUB instruction is followed by a SBB instruction.
Operation
DEST
DEST - (SRC + CF);
Flags Affected
The OF, SF, ZF, AF, PF, and CF flags are set according to the result.
Additional Itanium System Environment Exceptions
Itanium Reg Faults NaT Register Consumption Abort.
Opcode
Instruction
Description
1C
ib
SBB AL,
imm8
Subtract with borrow
imm8
from AL
1D
iw
SBB AX,
imm16
Subtract with borrow
imm16
from AX
1D
id
SBB EAX,
imm32
Subtract with borrow
imm32
from EAX
80 /3
ib
SBB
r/m8,imm8
Subtract with borrow
imm8
from
r/m8
81 /3
iw
SBB
r/m16,imm16
Subtract with borrow
imm16
from
r/m16
81 /3
id
SBB
r/m32,imm32
Subtract with borrow
imm32
from
r/m32
83 /3
ib
SBB
r/m16,imm8
Subtract with borrow sign-extended
imm8
from
r/m16
83 /3
ib
SBB
r/m32,imm8
Subtract with borrow sign-extended
imm8
from
r/m32
18 /
r
SBB
r/m8,r8
Subtract with borrow
r8
from
r/m8
19 /
r
SBB
r/m16,r16
Subtract with borrow
r16
from
r/m16
19 /
r
SBB
r/m32,r32
Subtract with borrow
r32
from
r/m32
1A /
r
SBB
r8,r/m8
Subtract with borrow
r/m8
from
r8
1B /
r
SBB
r16,r/m16
Subtract with borrow
r/m16
from
r16
1B /
r
SBB
r32,r/m32
Subtract with borrow
r/m32
from
r32
Summary of Contents for ITANIUM ARCHITECTURE - SOFTWARE DEVELOPERS VOLUME 3 REV 2.3
Page 1: ......
Page 11: ...x Intel Itanium Architecture Software Developer s Manual Rev 2 3 ...
Page 13: ...1 2 Intel Itanium Architecture Software Developer s Manual Rev 2 3 ...
Page 33: ...1 22 Volume 1 Part 1 Introduction to the Intel Itanium Architecture ...
Page 57: ...1 46 Volume 1 Part 1 Execution Environment ...
Page 147: ...1 136 Intel Itanium Architecture Software Developer s Manual Rev 2 3 ...
Page 149: ...1 138 Volume 1 Part 2 About the Optimization Guide ...
Page 191: ...1 180 Volume 1 Part 2 Predication Control Flow and Instruction Stream ...
Page 230: ......
Page 248: ...236 Intel Itanium Architecture Software Developer s Manual Rev 2 3 ...
Page 250: ...2 2 Intel Itanium Architecture Software Developer s Manual Rev 2 3 ...
Page 264: ...2 16 Volume 2 Part 1 Intel Itanium System Environment ...
Page 380: ...2 132 Volume 2 Part 1 Interruptions ...
Page 398: ...2 150 Volume 2 Part 1 Register Stack Engine ...
Page 486: ...2 238 Volume 2 Part 1 IA 32 Interruption Vector Descriptions ...
Page 750: ...2 502 Intel Itanium Architecture Software Developer s Manual Rev 2 3 ...
Page 754: ...2 506 Volume 2 Part 2 About the System Programmer s Guide ...
Page 796: ...2 548 Volume 2 Part 2 Interruptions and Serialization ...
Page 808: ...2 560 Volume 2 Part 2 Context Management ...
Page 842: ...2 594 Volume 2 Part 2 Floating point System Software ...
Page 850: ...2 602 Volume 2 Part 2 IA 32 Application Support ...
Page 862: ...2 614 Volume 2 Part 2 External Interrupt Architecture ...
Page 870: ...2 622 Volume 2 Part 2 Performance Monitoring Support ...
Page 891: ......
Page 1099: ...3 200 Volume 3 Instruction Reference padd Interruptions Illegal Operation fault ...
Page 1295: ...3 396 Volume 3 Resource and Dependency Semantics ...
Page 1296: ......
Page 1302: ...402 Intel Itanium Architecture Software Developer s Manual Rev 2 3 ...
Page 1494: ...4 192 Volume 4 Base IA 32 Instruction Reference FWAIT Wait See entry for WAIT ...
Page 1647: ...Volume 4 Base IA 32 Instruction Reference 4 345 ROL ROR Rotate See entry for RCL RCR ROL ROR ...
Page 1884: ...4 582 Volume 4 IA 32 SSE Instruction Reference ...
Page 1885: ...Index Intel Itanium Architecture Software Developer s Manual Rev 2 3 Index ...
Page 1886: ...Index Intel Itanium Architecture Software Developer s Manual Rev 2 3 ...
Page 1898: ...INDEX Index 12 Index for Volumes 1 2 3 and 4 ...