Commit 30304420 authored by David Gibson's avatar David Gibson Committed by Alexander Graf
Browse files

target-ppc: Extend FPU state for newer POWER CPUs



This patch adds some extra FPU state to CPUPPCState.  Specifically,
fpscr is extended to a target_ulong bits, since some recent (64 bit)
CPUs now have more status bits than fit inside 32 bits.  Also, we add
the 32 VSR registers present on CPUs with VSX (these extend the
standard FP regs, which together with the Altivec/VMX registers form a
64 x 128bit register file for VSX).

We don't actually support the instructions using these extra registers
in TCG yet, but we still need a place to store the state so we can
sync it with KVM and savevm/loadvm it.  This patch updates the savevm
code to not fail on the extended state, but also does not actually
save it - that's a project for another patch.
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent ac7d12ba
......@@ -963,7 +963,7 @@ struct CPUPPCState {
/* floating point registers */
float64 fpr[32];
/* floating point status and control register */
uint32_t fpscr;
target_ulong fpscr;
/* Next instruction pointer */
target_ulong nip;
......@@ -1014,6 +1014,8 @@ struct CPUPPCState {
/* Altivec registers */
ppc_avr_t avr[32];
uint32_t vscr;
/* VSX registers */
uint64_t vsr[32];
/* SPE registers */
uint64_t spe_acc;
uint32_t spe_fscr;
......
......@@ -6,6 +6,7 @@ void cpu_save(QEMUFile *f, void *opaque)
{
CPUPPCState *env = (CPUPPCState *)opaque;
unsigned int i, j;
uint32_t fpscr;
for (i = 0; i < 32; i++)
qemu_put_betls(f, &env->gpr[i]);
......@@ -30,7 +31,8 @@ void cpu_save(QEMUFile *f, void *opaque)
u.d = env->fpr[i];
qemu_put_be64(f, u.l);
}
qemu_put_be32s(f, &env->fpscr);
fpscr = env->fpscr;
qemu_put_be32s(f, &fpscr);
qemu_put_sbe32s(f, &env->access_type);
#if defined(TARGET_PPC64)
qemu_put_betls(f, &env->asr);
......@@ -90,6 +92,7 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id)
CPUPPCState *env = (CPUPPCState *)opaque;
unsigned int i, j;
target_ulong sdr1;
uint32_t fpscr;
for (i = 0; i < 32; i++)
qemu_get_betls(f, &env->gpr[i]);
......@@ -114,7 +117,8 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id)
u.l = qemu_get_be64(f);
env->fpr[i] = u.d;
}
qemu_get_be32s(f, &env->fpscr);
qemu_get_be32s(f, &fpscr);
env->fpscr = fpscr;
qemu_get_sbe32s(f, &env->access_type);
#if defined(TARGET_PPC64)
qemu_get_betls(f, &env->asr);
......
......@@ -68,7 +68,7 @@ static TCGv cpu_cfar;
#endif
static TCGv cpu_xer;
static TCGv cpu_reserve;
static TCGv_i32 cpu_fpscr;
static TCGv cpu_fpscr;
static TCGv_i32 cpu_access_type;
#include "gen-icount.h"
......@@ -163,8 +163,8 @@ void ppc_translate_init(void)
offsetof(CPUPPCState, reserve_addr),
"reserve_addr");
cpu_fpscr = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUPPCState, fpscr), "fpscr");
cpu_fpscr = tcg_global_mem_new(TCG_AREG0,
offsetof(CPUPPCState, fpscr), "fpscr");
cpu_access_type = tcg_global_mem_new_i32(TCG_AREG0,
offsetof(CPUPPCState, access_type), "access_type");
......@@ -2302,6 +2302,7 @@ GEN_FLOAT_B(neg, 0x08, 0x01, 0, PPC_FLOAT);
/* mcrfs */
static void gen_mcrfs(DisasContext *ctx)
{
TCGv tmp = tcg_temp_new();
int bfa;
if (unlikely(!ctx->fpu_enabled)) {
......@@ -2309,9 +2310,11 @@ static void gen_mcrfs(DisasContext *ctx)
return;
}
bfa = 4 * (7 - crfS(ctx->opcode));
tcg_gen_shri_i32(cpu_crf[crfD(ctx->opcode)], cpu_fpscr, bfa);
tcg_gen_shri_tl(tmp, cpu_fpscr, bfa);
tcg_gen_trunc_tl_i32(cpu_crf[crfD(ctx->opcode)], tmp);
tcg_temp_free(tmp);
tcg_gen_andi_i32(cpu_crf[crfD(ctx->opcode)], cpu_crf[crfD(ctx->opcode)], 0xf);
tcg_gen_andi_i32(cpu_fpscr, cpu_fpscr, ~(0xF << bfa));
tcg_gen_andi_tl(cpu_fpscr, cpu_fpscr, ~(0xF << bfa));
}
/* mffs */
......@@ -2322,7 +2325,7 @@ static void gen_mffs(DisasContext *ctx)
return;
}
gen_reset_fpstatus();
tcg_gen_extu_i32_i64(cpu_fpr[rD(ctx->opcode)], cpu_fpscr);
tcg_gen_extu_tl_i64(cpu_fpr[rD(ctx->opcode)], cpu_fpscr);
gen_compute_fprf(cpu_fpr[rD(ctx->opcode)], 0, Rc(ctx->opcode) != 0);
}
......@@ -2346,7 +2349,8 @@ static void gen_mtfsb0(DisasContext *ctx)
tcg_temp_free_i32(t0);
}
if (unlikely(Rc(ctx->opcode) != 0)) {
tcg_gen_shri_i32(cpu_crf[1], cpu_fpscr, FPSCR_OX);
tcg_gen_trunc_tl_i32(cpu_crf[1], cpu_fpscr);
tcg_gen_shri_i32(cpu_crf[1], cpu_crf[1], FPSCR_OX);
}
}
......@@ -2371,7 +2375,8 @@ static void gen_mtfsb1(DisasContext *ctx)
tcg_temp_free_i32(t0);
}
if (unlikely(Rc(ctx->opcode) != 0)) {
tcg_gen_shri_i32(cpu_crf[1], cpu_fpscr, FPSCR_OX);
tcg_gen_trunc_tl_i32(cpu_crf[1], cpu_fpscr);
tcg_gen_shri_i32(cpu_crf[1], cpu_crf[1], FPSCR_OX);
}
/* We can raise a differed exception */
gen_helper_float_check_status(cpu_env);
......@@ -2397,7 +2402,8 @@ static void gen_mtfsf(DisasContext *ctx)
gen_helper_store_fpscr(cpu_env, cpu_fpr[rB(ctx->opcode)], t0);
tcg_temp_free_i32(t0);
if (unlikely(Rc(ctx->opcode) != 0)) {
tcg_gen_shri_i32(cpu_crf[1], cpu_fpscr, FPSCR_OX);
tcg_gen_trunc_tl_i32(cpu_crf[1], cpu_fpscr);
tcg_gen_shri_i32(cpu_crf[1], cpu_crf[1], FPSCR_OX);
}
/* We can raise a differed exception */
gen_helper_float_check_status(cpu_env);
......@@ -2425,7 +2431,8 @@ static void gen_mtfsfi(DisasContext *ctx)
tcg_temp_free_i64(t0);
tcg_temp_free_i32(t1);
if (unlikely(Rc(ctx->opcode) != 0)) {
tcg_gen_shri_i32(cpu_crf[1], cpu_fpscr, FPSCR_OX);
tcg_gen_trunc_tl_i32(cpu_crf[1], cpu_fpscr);
tcg_gen_shri_i32(cpu_crf[1], cpu_crf[1], FPSCR_OX);
}
/* We can raise a differed exception */
gen_helper_float_check_status(cpu_env);
......@@ -9463,7 +9470,7 @@ void cpu_dump_state (CPUPPCState *env, FILE *f, fprintf_function cpu_fprintf,
if ((i & (RFPL - 1)) == (RFPL - 1))
cpu_fprintf(f, "\n");
}
cpu_fprintf(f, "FPSCR %08x\n", env->fpscr);
cpu_fprintf(f, "FPSCR " TARGET_FMT_lx "\n", env->fpscr);
#if !defined(CONFIG_USER_ONLY)
cpu_fprintf(f, " SRR0 " TARGET_FMT_lx " SRR1 " TARGET_FMT_lx
" PVR " TARGET_FMT_lx " VRSAVE " TARGET_FMT_lx "\n",
......
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment