From: zlim.lnx@gmail.com (Zi Shen Lim)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 06/14] arm64: introduce aarch64_insn_gen_add_sub_imm()
Date: Fri, 18 Jul 2014 11:28:12 -0700 [thread overview]
Message-ID: <1405708100-13604-7-git-send-email-zlim.lnx@gmail.com> (raw)
In-Reply-To: <1405708100-13604-1-git-send-email-zlim.lnx@gmail.com>
Introduce function to generate add/subtract (immediate) instructions.
Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
---
arch/arm64/include/asm/insn.h | 16 ++++++++++++++++
arch/arm64/kernel/insn.c | 44 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 60 insertions(+)
diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h
index eef8f1e..29386aa 100644
--- a/arch/arm64/include/asm/insn.h
+++ b/arch/arm64/include/asm/insn.h
@@ -75,6 +75,7 @@ enum aarch64_insn_register_type {
AARCH64_INSN_REGTYPE_RN,
AARCH64_INSN_REGTYPE_RT2,
AARCH64_INSN_REGTYPE_RM,
+ AARCH64_INSN_REGTYPE_RD,
};
enum aarch64_insn_register {
@@ -162,6 +163,13 @@ enum aarch64_insn_ldst_type {
AARCH64_INSN_LDST_STORE_PAIR_POST_INDEX,
};
+enum aarch64_insn_adsb_type {
+ AARCH64_INSN_ADSB_ADD,
+ AARCH64_INSN_ADSB_SUB,
+ AARCH64_INSN_ADSB_ADD_SETFLAGS,
+ AARCH64_INSN_ADSB_SUB_SETFLAGS
+};
+
#define __AARCH64_INSN_FUNCS(abbr, mask, val) \
static __always_inline bool aarch64_insn_is_##abbr(u32 code) \
{ return (code & (mask)) == (val); } \
@@ -174,6 +182,10 @@ __AARCH64_INSN_FUNCS(stp_post, 0x7FC00000, 0x28800000)
__AARCH64_INSN_FUNCS(ldp_post, 0x7FC00000, 0x28C00000)
__AARCH64_INSN_FUNCS(stp_pre, 0x7FC00000, 0x29800000)
__AARCH64_INSN_FUNCS(ldp_pre, 0x7FC00000, 0x29C00000)
+__AARCH64_INSN_FUNCS(add_imm, 0x7F000000, 0x11000000)
+__AARCH64_INSN_FUNCS(adds_imm, 0x7F000000, 0x31000000)
+__AARCH64_INSN_FUNCS(sub_imm, 0x7F000000, 0x51000000)
+__AARCH64_INSN_FUNCS(subs_imm, 0x7F000000, 0x71000000)
__AARCH64_INSN_FUNCS(b, 0xFC000000, 0x14000000)
__AARCH64_INSN_FUNCS(bl, 0xFC000000, 0x94000000)
__AARCH64_INSN_FUNCS(cbz, 0xFE000000, 0x34000000)
@@ -220,6 +232,10 @@ u32 aarch64_insn_gen_load_store_pair(enum aarch64_insn_register reg1,
int offset,
enum aarch64_insn_variant variant,
enum aarch64_insn_ldst_type type);
+u32 aarch64_insn_gen_add_sub_imm(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ int imm, enum aarch64_insn_variant variant,
+ enum aarch64_insn_adsb_type type);
bool aarch64_insn_hotpatch_safe(u32 old_insn, u32 new_insn);
diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c
index 7880c06..ec3a902 100644
--- a/arch/arm64/kernel/insn.c
+++ b/arch/arm64/kernel/insn.c
@@ -285,6 +285,7 @@ static u32 aarch64_insn_encode_register(enum aarch64_insn_register_type type,
switch (type) {
case AARCH64_INSN_REGTYPE_RT:
+ case AARCH64_INSN_REGTYPE_RD:
shift = 0;
break;
case AARCH64_INSN_REGTYPE_RN:
@@ -555,3 +556,46 @@ u32 aarch64_insn_gen_load_store_pair(enum aarch64_insn_register reg1,
return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_7, insn,
offset >> shift);
}
+
+u32 aarch64_insn_gen_add_sub_imm(enum aarch64_insn_register dst,
+ enum aarch64_insn_register src,
+ int imm, enum aarch64_insn_variant variant,
+ enum aarch64_insn_adsb_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_ADSB_ADD:
+ insn = aarch64_insn_get_add_imm_value();
+ break;
+ case AARCH64_INSN_ADSB_SUB:
+ insn = aarch64_insn_get_sub_imm_value();
+ break;
+ case AARCH64_INSN_ADSB_ADD_SETFLAGS:
+ insn = aarch64_insn_get_adds_imm_value();
+ break;
+ case AARCH64_INSN_ADSB_SUB_SETFLAGS:
+ insn = aarch64_insn_get_subs_imm_value();
+ break;
+ default:
+ BUG_ON(1);
+ }
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT;
+ break;
+ default:
+ BUG_ON(1);
+ }
+
+ BUG_ON(imm & ~(SZ_4K - 1));
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RN, insn, src);
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_12, insn, imm);
+}
--
1.9.1
next prev parent reply other threads:[~2014-07-18 18:28 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-18 18:28 [PATCH 00/14] arm64: eBPF JIT compiler Zi Shen Lim
2014-07-18 18:28 ` [PATCH 01/14] arm64: introduce aarch64_insn_gen_comp_branch_imm() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 02/14] arm64: introduce aarch64_insn_gen_branch_reg() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 03/14] arm64: introduce aarch64_insn_gen_cond_branch_imm() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 04/14] arm64: introduce aarch64_insn_gen_load_store_reg() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 05/14] arm64: introduce aarch64_insn_gen_load_store_pair() Zi Shen Lim
2014-07-18 18:28 ` Zi Shen Lim [this message]
2014-07-18 18:28 ` [PATCH 07/14] arm64: introduce aarch64_insn_gen_bitfield() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 08/14] arm64: introduce aarch64_insn_gen_movewide() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 09/14] arm64: introduce aarch64_insn_gen_add_sub_shifted_reg() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 10/14] arm64: introduce aarch64_insn_gen_data1() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 11/14] arm64: introduce aarch64_insn_gen_data2() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 12/14] arm64: introduce aarch64_insn_gen_data3() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 13/14] arm64: introduce aarch64_insn_gen_logical_shifted_reg() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 14/14] arm64: eBPF JIT compiler Zi Shen Lim
2014-07-21 9:16 ` [PATCH 00/14] " Will Deacon
2014-07-21 15:49 ` Alexei Starovoitov
2014-07-23 5:24 ` Z Lim
2014-07-23 21:57 ` David Miller
2014-07-23 10:32 ` Catalin Marinas
2014-07-24 4:55 ` Z Lim
2014-07-24 11:32 ` Will Deacon
2014-08-26 9:58 ` Will Deacon
2014-08-27 2:02 ` Z Lim
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