Freescale Semiconductor StarCore SC140 - Manual (Page 405)

BMTSTC.W
SC140 DSP Core Reference Manual A-91
BMTSTC.W
Bit-Masked Test a
BMTSTC.W
16-Bit Operand in Memory If Clear (BMU)
Description
These operations use an unsigned 16-bit immediate data mask to determine if all selected bits in an
operand are cleared. If all the selected bits are cleared, the T bit is set; if not, the T bit is cleared. The
absolute addresses, offsets, and address register values must be word-aligned.
Operation Assembler Syntax
if (#u16 & (SP-u5)) == $0000, then 1
→T else 0→T
BMTSTC.W #u16,(SP–u5){0
≤ u16 < 2 16
}
{0
≤ u5 < 64,W}
if (#u16 & (SP+s16)) == $0000, then 1
→T else 0→T
BMTSTC.W #u16,(SP+s16){0
≤ u16 < 2 16
}
{–2
15 ≤ s16 < 2 15
,W}
if (#u16 & (Rn)) == $0000, then 1
→T else 0→T
BMTSTC.W #u16,(Rn){0
≤ u16 < 2 16
}
if (#u16 & (a16)) == $0000, then 1
→T else 0→T
BMTSTC.W #u16,(a16){0
≤ u16 < 2 16
}
{0
≤ a16 < 2 16
,W}
BMTSTC.W #u16,(SP–u5)
Tests selected bits in the contents of a memory address pointed to by the active stack pointer (SP) with an
unsigned 5-bit offset.
BMTSTC.W #u16,(SP+s16)
Tests selected bits in the contents of a memory address pointed to by the active stack pointer (SP) with a
signed 16-bit offset.
BMTSTC.W #u16,(Rn)
Tests selected bits in the contents of a memory address pointed to by an address register (Rn).
BMTSTC.W #u16,(a16)
Tests selected bits in the contents of a memory address pointed to by an absolute 16-bit address.