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target/loongarch: Add LSX data type VReg

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Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20230504122810.4094787-2-gaosong@loongson.cn>
This commit is contained in:
Song Gao 2023-05-04 20:27:27 +08:00
parent eb5c3932a3
commit 16f5396cec
No known key found for this signature in database
GPG Key ID: 40A2FFF239263EDF
6 changed files with 119 additions and 13 deletions
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4
linux-user/loongarch64/signal.c
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@ -128,7 +128,7 @@ static void setup_sigframe(CPULoongArchState *env,
fpu_ctx = (struct target_fpu_context *)(info + 1);
for (i = 0; i < 32; ++i) {
__put_user(env->fpr[i], &fpu_ctx->regs[i]);
__put_user(env->fpr[i].vreg.D(0), &fpu_ctx->regs[i]);
}
__put_user(read_fcc(env), &fpu_ctx->fcc);
__put_user(env->fcsr0, &fpu_ctx->fcsr);
@ -193,7 +193,7 @@ static void restore_sigframe(CPULoongArchState *env,
uint64_t fcc;
for (i = 0; i < 32; ++i) {
__get_user(env->fpr[i], &fpu_ctx->regs[i]);
__get_user(env->fpr[i].vreg.D(0), &fpu_ctx->regs[i]);
}
__get_user(fcc, &fpu_ctx->fcc);
write_fcc(env, fcc);

2
target/loongarch/cpu.c
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@ -656,7 +656,7 @@ void loongarch_cpu_dump_state(CPUState *cs, FILE *f, int flags)
/* fpr */
if (flags & CPU_DUMP_FPU) {
for (i = 0; i < 32; i++) {
qemu_fprintf(f, " %s %016" PRIx64, fregnames[i], env->fpr[i]);
qemu_fprintf(f, " %s %016" PRIx64, fregnames[i], env->fpr[i].vreg.D(0));
if ((i & 3) == 3) {
qemu_fprintf(f, "\n");
}

21
target/loongarch/cpu.h
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@ -8,6 +8,7 @@
#ifndef LOONGARCH_CPU_H
#define LOONGARCH_CPU_H
#include "qemu/int128.h"
#include "exec/cpu-defs.h"
#include "fpu/softfloat-types.h"
#include "hw/registerfields.h"
@ -241,6 +242,24 @@ FIELD(TLB_MISC, ASID, 1, 10)
FIELD(TLB_MISC, VPPN, 13, 35)
FIELD(TLB_MISC, PS, 48, 6)
#define LSX_LEN (128)
typedef union VReg {
int8_t B[LSX_LEN / 8];
int16_t H[LSX_LEN / 16];
int32_t W[LSX_LEN / 32];
int64_t D[LSX_LEN / 64];
uint8_t UB[LSX_LEN / 8];
uint16_t UH[LSX_LEN / 16];
uint32_t UW[LSX_LEN / 32];
uint64_t UD[LSX_LEN / 64];
Int128 Q[LSX_LEN / 128];
}VReg;
typedef union fpr_t fpr_t;
union fpr_t {
VReg vreg;
};
struct LoongArchTLB {
uint64_t tlb_misc;
/* Fields corresponding to CSR_TLBELO0/1 */
@ -253,7 +272,7 @@ typedef struct CPUArchState {
uint64_t gpr[32];
uint64_t pc;
uint64_t fpr[32];
fpr_t fpr[32];
float_status fp_status;
bool cf[8];

4
target/loongarch/gdbstub.c
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@ -69,7 +69,7 @@ static int loongarch_gdb_get_fpu(CPULoongArchState *env,
GByteArray *mem_buf, int n)
{
if (0 <= n && n < 32) {
return gdb_get_reg64(mem_buf, env->fpr[n]);
return gdb_get_reg64(mem_buf, env->fpr[n].vreg.D(0));
} else if (n == 32) {
uint64_t val = read_fcc(env);
return gdb_get_reg64(mem_buf, val);
@ -85,7 +85,7 @@ static int loongarch_gdb_set_fpu(CPULoongArchState *env,
int length = 0;
if (0 <= n && n < 32) {
env->fpr[n] = ldq_p(mem_buf);
env->fpr[n].vreg.D(0) = ldq_p(mem_buf);
length = 8;
} else if (n == 32) {
uint64_t val = ldq_p(mem_buf);

22
target/loongarch/internals.h
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@ -21,6 +21,28 @@
/* Global bit for huge page */
#define LOONGARCH_HGLOBAL_SHIFT 12
#if HOST_BIG_ENDIAN
#define B(x) B[15 - (x)]
#define H(x) H[7 - (x)]
#define W(x) W[3 - (x)]
#define D(x) D[1 - (x)]
#define UB(x) UB[15 - (x)]
#define UH(x) UH[7 - (x)]
#define UW(x) UW[3 - (x)]
#define UD(x) UD[1 -(x)]
#define Q(x) Q[x]
#else
#define B(x) B[x]
#define H(x) H[x]
#define W(x) W[x]
#define D(x) D[x]
#define UB(x) UB[x]
#define UH(x) UH[x]
#define UW(x) UW[x]
#define UD(x) UD[x]
#define Q(x) Q[x]
#endif
void loongarch_translate_init(void);
void loongarch_cpu_dump_state(CPUState *cpu, FILE *f, int flags);

79
target/loongarch/machine.c
View File

@ -10,6 +10,72 @@
#include "migration/cpu.h"
#include "internals.h"
static const VMStateDescription vmstate_fpu_reg = {
.name = "fpu_reg",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT64(UD(0), VReg),
VMSTATE_END_OF_LIST()
}
};
#define VMSTATE_FPU_REGS(_field, _state, _start) \
VMSTATE_STRUCT_SUB_ARRAY(_field, _state, _start, 32, 0, \
vmstate_fpu_reg, fpr_t)
static bool fpu_needed(void *opaque)
{
LoongArchCPU *cpu = opaque;
return FIELD_EX64(cpu->env.cpucfg[2], CPUCFG2, FP);
}
static const VMStateDescription vmstate_fpu = {
.name = "cpu/fpu",
.version_id = 1,
.minimum_version_id = 1,
.needed = fpu_needed,
.fields = (VMStateField[]) {
VMSTATE_FPU_REGS(env.fpr, LoongArchCPU, 0),
VMSTATE_UINT32(env.fcsr0, LoongArchCPU),
VMSTATE_BOOL_ARRAY(env.cf, LoongArchCPU, 8),
VMSTATE_END_OF_LIST()
},
};
static const VMStateDescription vmstate_lsxh_reg = {
.name = "lsxh_reg",
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT64(UD(1), VReg),
VMSTATE_END_OF_LIST()
}
};
#define VMSTATE_LSXH_REGS(_field, _state, _start) \
VMSTATE_STRUCT_SUB_ARRAY(_field, _state, _start, 32, 0, \
vmstate_lsxh_reg, fpr_t)
static bool lsx_needed(void *opaque)
{
LoongArchCPU *cpu = opaque;
return FIELD_EX64(cpu->env.cpucfg[2], CPUCFG2, LSX);
}
static const VMStateDescription vmstate_lsx = {
.name = "cpu/lsx",
.version_id = 1,
.minimum_version_id = 1,
.needed = lsx_needed,
.fields = (VMStateField[]) {
VMSTATE_LSXH_REGS(env.fpr, LoongArchCPU, 0),
VMSTATE_END_OF_LIST()
},
};
/* TLB state */
const VMStateDescription vmstate_tlb = {
.name = "cpu/tlb",
@ -24,18 +90,13 @@ const VMStateDescription vmstate_tlb = {
};
/* LoongArch CPU state */
const VMStateDescription vmstate_loongarch_cpu = {
.name = "cpu",
.version_id = 0,
.minimum_version_id = 0,
.version_id = 1,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINTTL_ARRAY(env.gpr, LoongArchCPU, 32),
VMSTATE_UINTTL(env.pc, LoongArchCPU),
VMSTATE_UINT64_ARRAY(env.fpr, LoongArchCPU, 32),
VMSTATE_UINT32(env.fcsr0, LoongArchCPU),
VMSTATE_BOOL_ARRAY(env.cf, LoongArchCPU, 8),
/* Remaining CSRs */
VMSTATE_UINT64(env.CSR_CRMD, LoongArchCPU),
@ -99,4 +160,8 @@ const VMStateDescription vmstate_loongarch_cpu = {
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription*[]) {
&vmstate_fpu,
&vmstate_lsx,
}
};