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authorMarkos Chandras <markos.chandras@imgtec.com>2014-07-23 10:00:09 +0100
committerRalf Baechle <ralf@linux-mips.org>2014-09-22 13:35:51 +0200
commit39bcb7969a84aab3dcdb857b261a87d5d888f5a7 (patch)
treea8b6a4f1e4fd765cc9c904c5b3baf53f50d8b65a /arch/mips/net
parent011eeece0bb2e1b65b2d2fd618067425e8ccdbb4 (diff)
downloadop-kernel-dev-39bcb7969a84aab3dcdb857b261a87d5d888f5a7.zip
op-kernel-dev-39bcb7969a84aab3dcdb857b261a87d5d888f5a7.tar.gz
MIPS: BPF: Add new emit_long_instr macro
This macro uses the capitalized UASM_* macros to emit 32 or 64-bit instructions depending on the kernel configurations. This allows us to remove a few CONFIG_64BIT ifdefs from the code. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/7446/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/net')
-rw-r--r--arch/mips/net/bpf_jit.c51
1 files changed, 19 insertions, 32 deletions
diff --git a/arch/mips/net/bpf_jit.c b/arch/mips/net/bpf_jit.c
index ae8cc84..b14e214 100644
--- a/arch/mips/net/bpf_jit.c
+++ b/arch/mips/net/bpf_jit.c
@@ -163,6 +163,19 @@ do { \
(ctx)->idx++; \
} while (0)
+/*
+ * Similar to emit_instr but it must be used when we need to emit
+ * 32-bit or 64-bit instructions
+ */
+#define emit_long_instr(ctx, func, ...) \
+do { \
+ if ((ctx)->target != NULL) { \
+ u32 *p = &(ctx)->target[ctx->idx]; \
+ UASM_i_##func(&p, ##__VA_ARGS__); \
+ } \
+ (ctx)->idx++; \
+} while (0)
+
/* Determine if immediate is within the 16-bit signed range */
static inline bool is_range16(s32 imm)
{
@@ -218,13 +231,6 @@ static inline void emit_ori(unsigned int dst, unsigned src, u32 imm,
}
}
-
-static inline void emit_daddu(unsigned int dst, unsigned int src1,
- unsigned int src2, struct jit_ctx *ctx)
-{
- emit_instr(ctx, daddu, dst, src1, src2);
-}
-
static inline void emit_daddiu(unsigned int dst, unsigned int src,
int imm, struct jit_ctx *ctx)
{
@@ -283,11 +289,7 @@ static inline void emit_xori(ptr dst, ptr src, u32 imm, struct jit_ctx *ctx)
static inline void emit_stack_offset(int offset, struct jit_ctx *ctx)
{
- if (config_enabled(CONFIG_64BIT))
- emit_instr(ctx, daddiu, r_sp, r_sp, offset);
- else
- emit_instr(ctx, addiu, r_sp, r_sp, offset);
-
+ emit_long_instr(ctx, ADDIU, r_sp, r_sp, offset);
}
static inline void emit_subu(unsigned int dst, unsigned int src1,
@@ -365,10 +367,7 @@ static inline void emit_store_stack_reg(ptr reg, ptr base,
unsigned int offset,
struct jit_ctx *ctx)
{
- if (config_enabled(CONFIG_64BIT))
- emit_instr(ctx, sd, reg, offset, base);
- else
- emit_instr(ctx, sw, reg, offset, base);
+ emit_long_instr(ctx, SW, reg, offset, base);
}
static inline void emit_store(ptr reg, ptr base, unsigned int offset,
@@ -381,10 +380,7 @@ static inline void emit_load_stack_reg(ptr reg, ptr base,
unsigned int offset,
struct jit_ctx *ctx)
{
- if (config_enabled(CONFIG_64BIT))
- emit_instr(ctx, ld, reg, offset, base);
- else
- emit_instr(ctx, lw, reg, offset, base);
+ emit_long_instr(ctx, LW, reg, offset, base);
}
static inline void emit_load(unsigned int reg, unsigned int base,
@@ -458,10 +454,7 @@ static inline void emit_load_ptr(unsigned int dst, unsigned int src,
int imm, struct jit_ctx *ctx)
{
/* src contains the base addr of the 32/64-pointer */
- if (config_enabled(CONFIG_64BIT))
- emit_instr(ctx, ld, dst, imm, src);
- else
- emit_instr(ctx, lw, dst, imm, src);
+ emit_long_instr(ctx, LW, dst, imm, src);
}
/* load a function pointer to register */
@@ -483,10 +476,7 @@ static inline void emit_load_func(unsigned int reg, ptr imm,
/* Move to real MIPS register */
static inline void emit_reg_move(ptr dst, ptr src, struct jit_ctx *ctx)
{
- if (config_enabled(CONFIG_64BIT))
- emit_daddu(dst, src, r_zero, ctx);
- else
- emit_addu(dst, src, r_zero, ctx);
+ emit_long_instr(ctx, ADDU, dst, src, r_zero);
}
/* Move to JIT (32-bit) register */
@@ -623,10 +613,7 @@ static void save_bpf_jit_regs(struct jit_ctx *ctx, unsigned offset)
if (ctx->flags & SEEN_MEM) {
if (real_off % (RSIZE * 2))
real_off += RSIZE;
- if (config_enabled(CONFIG_64BIT))
- emit_daddiu(r_M, r_sp, real_off, ctx);
- else
- emit_addiu(r_M, r_sp, real_off, ctx);
+ emit_long_instr(ctx, ADDIU, r_M, r_sp, real_off);
}
}
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