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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: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
hifive-unleashed-5.1
Leonid Yegoshin 2014-11-18 16:24:15 +00:00 committed by Markos Chandras
parent 7fd08ca58a
commit 51eec48e12
1 changed files with 12 additions and 1 deletions
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13
arch/mips/mm/uasm.c
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@ -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");