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MIPS: Introduce accessors for MSA vector registers

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Introduce accessor functions allowing the kernel to access arbitrary
vector registers using an arbitrary data format. The accessors are
implemented in assembly, using macros to avoid massive duplication, in
order to make use of the existing support for MSA with & without
toolchain support. The accessors will be used in a later patch.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: linux-kernel@vger.kernel.org
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Manuel Lauss <manuel.lauss@gmail.com>
Patchwork: https://patchwork.linux-mips.org/patch/10572/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Paul Burton
2015-06-22 12:20:59 +01:00
committed by Ralf Baechle
parent 6701ca2df4
commit 6b35e11442
3 changed files with 261 additions and 0 deletions
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114
arch/mips/include/asm/asmmacro.h
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@@ -232,6 +232,30 @@
.set pop
.endm
.macro ld_b wd, off, base
.set push
.set mips32r2
.set msa
ld.b $w\wd, \off(\base)
.set pop
.endm
.macro ld_h wd, off, base
.set push
.set mips32r2
.set msa
ld.h $w\wd, \off(\base)
.set pop
.endm
.macro ld_w wd, off, base
.set push
.set mips32r2
.set msa
ld.w $w\wd, \off(\base)
.set pop
.endm
.macro ld_d wd, off, base
.set push
.set mips32r2
@@ -241,6 +265,30 @@
.set pop
.endm
.macro st_b wd, off, base
.set push
.set mips32r2
.set msa
st.b $w\wd, \off(\base)
.set pop
.endm
.macro st_h wd, off, base
.set push
.set mips32r2
.set msa
st.h $w\wd, \off(\base)
.set pop
.endm
.macro st_w wd, off, base
.set push
.set mips32r2
.set msa
st.w $w\wd, \off(\base)
.set pop
.endm
.macro st_d wd, off, base
.set push
.set mips32r2
@@ -290,7 +338,13 @@
#ifdef CONFIG_CPU_MICROMIPS
#define CFC_MSA_INSN 0x587e0056
#define CTC_MSA_INSN 0x583e0816
#define LDB_MSA_INSN 0x58000807
#define LDH_MSA_INSN 0x58000817
#define LDW_MSA_INSN 0x58000827
#define LDD_MSA_INSN 0x58000837
#define STB_MSA_INSN 0x5800080f
#define STH_MSA_INSN 0x5800081f
#define STW_MSA_INSN 0x5800082f
#define STD_MSA_INSN 0x5800083f
#define COPY_UW_MSA_INSN 0x58f00056
#define COPY_UD_MSA_INSN 0x58f80056
@@ -299,7 +353,13 @@
#else
#define CFC_MSA_INSN 0x787e0059
#define CTC_MSA_INSN 0x783e0819
#define LDB_MSA_INSN 0x78000820
#define LDH_MSA_INSN 0x78000821
#define LDW_MSA_INSN 0x78000822
#define LDD_MSA_INSN 0x78000823
#define STB_MSA_INSN 0x78000824
#define STH_MSA_INSN 0x78000825
#define STW_MSA_INSN 0x78000826
#define STD_MSA_INSN 0x78000827
#define COPY_UW_MSA_INSN 0x78f00059
#define COPY_UD_MSA_INSN 0x78f80059
@@ -329,6 +389,33 @@
.set pop
.endm
.macro ld_b wd, off, base
.set push
.set noat
SET_HARDFLOAT
addu $1, \base, \off
.word LDB_MSA_INSN | (\wd << 6)
.set pop
.endm
.macro ld_h wd, off, base
.set push
.set noat
SET_HARDFLOAT
addu $1, \base, \off
.word LDH_MSA_INSN | (\wd << 6)
.set pop
.endm
.macro ld_w wd, off, base
.set push
.set noat
SET_HARDFLOAT
addu $1, \base, \off
.word LDW_MSA_INSN | (\wd << 6)
.set pop
.endm
.macro ld_d wd, off, base
.set push
.set noat
@@ -338,6 +425,33 @@
.set pop
.endm
.macro st_b wd, off, base
.set push
.set noat
SET_HARDFLOAT
addu $1, \base, \off
.word STB_MSA_INSN | (\wd << 6)
.set pop
.endm
.macro st_h wd, off, base
.set push
.set noat
SET_HARDFLOAT
addu $1, \base, \off
.word STH_MSA_INSN | (\wd << 6)
.set pop
.endm
.macro st_w wd, off, base
.set push
.set noat
SET_HARDFLOAT
addu $1, \base, \off
.word STW_MSA_INSN | (\wd << 6)
.set pop
.endm
.macro st_d wd, off, base
.set push
.set noat