提交 51eec48e 编写于 作者: L Leonid Yegoshin 提交者: Markos Chandras

MIPS: mm: uasm: Add signed 9-bit immediate related macros

MIPS R6 redefines several instructions and reduces the immediate
field to 9-bits so add related macros for the microassembler.
Signed-off-by: NLeonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: NMarkos Chandras <markos.chandras@imgtec.com>
上级 7fd08ca5
......@@ -24,7 +24,8 @@ enum fields {
JIMM = 0x080,
FUNC = 0x100,
SET = 0x200,
SCIMM = 0x400
SCIMM = 0x400,
SIMM9 = 0x800,
};
#define OP_MASK 0x3f
......@@ -41,6 +42,8 @@ enum fields {
#define FUNC_SH 0
#define SET_MASK 0x7
#define SET_SH 0
#define SIMM9_SH 7
#define SIMM9_MASK 0x1ff
enum opcode {
insn_invalid,
......@@ -116,6 +119,14 @@ static inline u32 build_scimm(u32 arg)
return (arg & SCIMM_MASK) << SCIMM_SH;
}
static inline u32 build_scimm9(s32 arg)
{
WARN((arg > 0xff || arg < -0x100),
KERN_WARNING "Micro-assembler field overflow\n");
return (arg & SIMM9_MASK) << SIMM9_SH;
}
static inline u32 build_func(u32 arg)
{
WARN(arg & ~FUNC_MASK, KERN_WARNING "Micro-assembler field overflow\n");
......
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