From 51eec48e1252ea39d21b5206e4962f09f823a369 Mon Sep 17 00:00:00 2001 From: Leonid Yegoshin Date: Tue, 18 Nov 2014 16:24:15 +0000 Subject: [PATCH] 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 Signed-off-by: Markos Chandras --- arch/mips/mm/uasm.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/mips/mm/uasm.c b/arch/mips/mm/uasm.c index 4adf30284813..f86d293463a6 100644 --- a/arch/mips/mm/uasm.c +++ b/arch/mips/mm/uasm.c @@ -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"); -- GitLab