From: zlim.lnx@gmail.com (Zi Shen Lim)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 08/14] arm64: introduce aarch64_insn_gen_movewide()
Date: Fri, 18 Jul 2014 11:28:14 -0700 [thread overview]
Message-ID: <1405708100-13604-9-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 move wide (immediate) instructions.
Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
---
arch/arm64/include/asm/insn.h | 13 +++++++++++++
arch/arm64/kernel/insn.c | 43 +++++++++++++++++++++++++++++++++++++++++++
2 files changed, 56 insertions(+)
diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h
index 8fd31fc..49dec28 100644
--- a/arch/arm64/include/asm/insn.h
+++ b/arch/arm64/include/asm/insn.h
@@ -172,6 +172,12 @@ enum aarch64_insn_adsb_type {
AARCH64_INSN_ADSB_SUB_SETFLAGS
};
+enum aarch64_insn_movewide_type {
+ AARCH64_INSN_MOVEWIDE_ZERO,
+ AARCH64_INSN_MOVEWIDE_KEEP,
+ AARCH64_INSN_MOVEWIDE_INVERSE
+};
+
enum aarch64_insn_bitfield_type {
AARCH64_INSN_BITFIELD_MOVE,
AARCH64_INSN_BITFIELD_MOVE_UNSIGNED,
@@ -194,9 +200,12 @@ __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(movn, 0x7F800000, 0x12800000)
__AARCH64_INSN_FUNCS(sbfm, 0x7F800000, 0x13000000)
__AARCH64_INSN_FUNCS(bfm, 0x7F800000, 0x33000000)
+__AARCH64_INSN_FUNCS(movz, 0x7F800000, 0x52800000)
__AARCH64_INSN_FUNCS(ubfm, 0x7F800000, 0x53000000)
+__AARCH64_INSN_FUNCS(movk, 0x7F800000, 0x72800000)
__AARCH64_INSN_FUNCS(b, 0xFC000000, 0x14000000)
__AARCH64_INSN_FUNCS(bl, 0xFC000000, 0x94000000)
__AARCH64_INSN_FUNCS(cbz, 0xFE000000, 0x34000000)
@@ -252,6 +261,10 @@ u32 aarch64_insn_gen_bitfield(enum aarch64_insn_register dst,
int immr, int imms,
enum aarch64_insn_variant variant,
enum aarch64_insn_bitfield_type type);
+u32 aarch64_insn_gen_movewide(enum aarch64_insn_register dst,
+ int imm, int shift,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_movewide_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 e07d026..7aa2784 100644
--- a/arch/arm64/kernel/insn.c
+++ b/arch/arm64/kernel/insn.c
@@ -655,3 +655,46 @@ u32 aarch64_insn_gen_bitfield(enum aarch64_insn_register dst,
return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_S, insn, imms);
}
+
+u32 aarch64_insn_gen_movewide(enum aarch64_insn_register dst,
+ int imm, int shift,
+ enum aarch64_insn_variant variant,
+ enum aarch64_insn_movewide_type type)
+{
+ u32 insn;
+
+ switch (type) {
+ case AARCH64_INSN_MOVEWIDE_ZERO:
+ insn = aarch64_insn_get_movz_value();
+ break;
+ case AARCH64_INSN_MOVEWIDE_KEEP:
+ insn = aarch64_insn_get_movk_value();
+ break;
+ case AARCH64_INSN_MOVEWIDE_INVERSE:
+ insn = aarch64_insn_get_movn_value();
+ break;
+ default:
+ BUG_ON(1);
+ }
+
+ BUG_ON(imm & ~(SZ_64K - 1));
+
+ switch (variant) {
+ case AARCH64_INSN_VARIANT_32BIT:
+ BUG_ON(shift != 0 && shift != 16);
+ break;
+ case AARCH64_INSN_VARIANT_64BIT:
+ insn |= AARCH64_INSN_SF_BIT;
+ BUG_ON(shift != 0 && shift != 16 && shift != 32 &&
+ shift != 48);
+ break;
+ default:
+ BUG_ON(1);
+ }
+
+ insn |= (shift >> 4) << 21;
+
+ insn = aarch64_insn_encode_register(AARCH64_INSN_REGTYPE_RD, insn, dst);
+
+ return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_16, 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 ` [PATCH 06/14] arm64: introduce aarch64_insn_gen_add_sub_imm() Zi Shen Lim
2014-07-18 18:28 ` [PATCH 07/14] arm64: introduce aarch64_insn_gen_bitfield() Zi Shen Lim
2014-07-18 18:28 ` Zi Shen Lim [this message]
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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