diff options
Diffstat (limited to 'target/ppc')
| -rw-r--r-- | target/ppc/cpu.h | 9 | ||||
| -rw-r--r-- | target/ppc/dfp_helper.c | 2 | ||||
| -rw-r--r-- | target/ppc/internal.h | 3 | ||||
| -rw-r--r-- | target/ppc/translate/fp-impl.inc.c | 69 | ||||
| -rw-r--r-- | target/ppc/translate/fp-ops.inc.c | 4 |
5 files changed, 84 insertions, 3 deletions
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index eaee1a5575..a23c6455b9 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -559,6 +559,9 @@ enum { /*****************************************************************************/ /* Floating point status and control register */ +#define FPSCR_DRN2 34 /* Decimal Floating-Point rounding control */ +#define FPSCR_DRN1 33 /* Decimal Floating-Point rounding control */ +#define FPSCR_DRN0 32 /* Decimal Floating-Point rounding control */ #define FPSCR_FX 31 /* Floating-point exception summary */ #define FPSCR_FEX 30 /* Floating-point enabled exception summary */ #define FPSCR_VX 29 /* Floating-point invalid operation exception summ. */ @@ -592,6 +595,7 @@ enum { #define FPSCR_NI 2 /* Floating-point non-IEEE mode */ #define FPSCR_RN1 1 #define FPSCR_RN0 0 /* Floating-point rounding control */ +#define fpscr_drn (((env->fpscr) & FP_DRN) >> FPSCR_DRN0) #define fpscr_fex (((env->fpscr) >> FPSCR_FEX) & 0x1) #define fpscr_vx (((env->fpscr) >> FPSCR_VX) & 0x1) #define fpscr_ox (((env->fpscr) >> FPSCR_OX) & 0x1) @@ -627,6 +631,10 @@ enum { #define fpscr_eex (((env->fpscr) >> FPSCR_XX) & ((env->fpscr) >> FPSCR_XE) & \ 0x1F) +#define FP_DRN2 (1ull << FPSCR_DRN2) +#define FP_DRN1 (1ull << FPSCR_DRN1) +#define FP_DRN0 (1ull << FPSCR_DRN0) +#define FP_DRN (FP_DRN2 | FP_DRN1 | FP_DRN0) #define FP_FX (1ull << FPSCR_FX) #define FP_FEX (1ull << FPSCR_FEX) #define FP_VX (1ull << FPSCR_VX) @@ -662,7 +670,6 @@ enum { #define FP_RN0 (1ull << FPSCR_RN0) #define FP_RN (FP_RN1 | FP_RN0) -#define FP_MODE FP_RN #define FP_ENABLES (FP_VE | FP_OE | FP_UE | FP_ZE | FP_XE) #define FP_STATUS (FP_FR | FP_FI | FP_FPRF) diff --git a/target/ppc/dfp_helper.c b/target/ppc/dfp_helper.c index f102177572..da8e08a35c 100644 --- a/target/ppc/dfp_helper.c +++ b/target/ppc/dfp_helper.c @@ -48,7 +48,7 @@ static void dfp_prepare_rounding_mode(decContext *context, uint64_t fpscr) { enum rounding rnd; - switch ((fpscr >> 32) & 0x7) { + switch ((fpscr & FP_DRN) >> FPSCR_DRN0) { case 0: rnd = DEC_ROUND_HALF_EVEN; break; diff --git a/target/ppc/internal.h b/target/ppc/internal.h index d3d327e548..15d655b356 100644 --- a/target/ppc/internal.h +++ b/target/ppc/internal.h @@ -157,6 +157,9 @@ EXTRACT_HELPER(FPL, 25, 1); EXTRACT_HELPER(FPFLM, 17, 8); EXTRACT_HELPER(FPW, 16, 1); +/* mffscrni */ +EXTRACT_HELPER(RM, 11, 2); + /* addpcis */ EXTRACT_HELPER_SPLIT_3(DX, 10, 6, 6, 5, 16, 1, 1, 0, 0) #if defined(TARGET_PPC64) diff --git a/target/ppc/translate/fp-impl.inc.c b/target/ppc/translate/fp-impl.inc.c index 7cd9d8db05..75f9523b07 100644 --- a/target/ppc/translate/fp-impl.inc.c +++ b/target/ppc/translate/fp-impl.inc.c @@ -634,11 +634,78 @@ static void gen_mffsl(DisasContext *ctx) gen_reset_fpstatus(); tcg_gen_extu_tl_i64(t0, cpu_fpscr); /* Mask everything except mode, status, and enables. */ - tcg_gen_andi_i64(t0, t0, FP_MODE | FP_STATUS | FP_ENABLES); + tcg_gen_andi_i64(t0, t0, FP_DRN | FP_STATUS | FP_ENABLES | FP_RN); set_fpr(rD(ctx->opcode), t0); tcg_temp_free_i64(t0); } +static void gen_helper_mffscrn(DisasContext *ctx, TCGv_i64 t1) +{ + TCGv_i64 t0 = tcg_temp_new_i64(); + TCGv_i32 mask = tcg_const_i32(0x0001); + + gen_reset_fpstatus(); + tcg_gen_extu_tl_i64(t0, cpu_fpscr); + tcg_gen_andi_i64(t0, t0, FP_DRN | FP_ENABLES | FP_RN); + set_fpr(rD(ctx->opcode), t0); + + /* Mask FPSCR value to clear RN. */ + tcg_gen_andi_i64(t0, t0, ~FP_RN); + + /* Merge RN into FPSCR value. */ + tcg_gen_or_i64(t0, t0, t1); + + gen_helper_store_fpscr(cpu_env, t0, mask); + + tcg_temp_free_i32(mask); + tcg_temp_free_i64(t0); +} + +/* mffscrn */ +static void gen_mffscrn(DisasContext *ctx) +{ + TCGv_i64 t1; + + if (unlikely(!(ctx->insns_flags2 & PPC2_ISA300))) { + return gen_mffs(ctx); + } + + if (unlikely(!ctx->fpu_enabled)) { + gen_exception(ctx, POWERPC_EXCP_FPU); + return; + } + + t1 = tcg_temp_new_i64(); + get_fpr(t1, rB(ctx->opcode)); + /* Mask FRB to get just RN. */ + tcg_gen_andi_i64(t1, t1, FP_RN); + + gen_helper_mffscrn(ctx, t1); + + tcg_temp_free_i64(t1); +} + +/* mffscrni */ +static void gen_mffscrni(DisasContext *ctx) +{ + TCGv_i64 t1; + + if (unlikely(!(ctx->insns_flags2 & PPC2_ISA300))) { + return gen_mffs(ctx); + } + + if (unlikely(!ctx->fpu_enabled)) { + gen_exception(ctx, POWERPC_EXCP_FPU); + return; + } + + t1 = tcg_const_i64((uint64_t)RM(ctx->opcode)); + + gen_helper_mffscrn(ctx, t1); + + tcg_temp_free_i64(t1); +} + /* mtfsb0 */ static void gen_mtfsb0(DisasContext *ctx) { diff --git a/target/ppc/translate/fp-ops.inc.c b/target/ppc/translate/fp-ops.inc.c index 88ebc2526c..f2bcf0e67b 100644 --- a/target/ppc/translate/fp-ops.inc.c +++ b/target/ppc/translate/fp-ops.inc.c @@ -107,6 +107,10 @@ GEN_HANDLER(mcrfs, 0x3F, 0x00, 0x02, 0x0063F801, PPC_FLOAT), GEN_HANDLER_E_2(mffs, 0x3F, 0x07, 0x12, 0x00, 0x00000000, PPC_FLOAT, PPC_NONE), GEN_HANDLER_E_2(mffsl, 0x3F, 0x07, 0x12, 0x18, 0x00000000, PPC_FLOAT, PPC2_ISA300), +GEN_HANDLER_E_2(mffscrn, 0x3F, 0x07, 0x12, 0x16, 0x00000000, PPC_FLOAT, + PPC_NONE), +GEN_HANDLER_E_2(mffscrni, 0x3F, 0x07, 0x12, 0x17, 0x00000000, PPC_FLOAT, + PPC_NONE), GEN_HANDLER(mtfsb0, 0x3F, 0x06, 0x02, 0x001FF800, PPC_FLOAT), GEN_HANDLER(mtfsb1, 0x3F, 0x06, 0x01, 0x001FF800, PPC_FLOAT), GEN_HANDLER(mtfsf, 0x3F, 0x07, 0x16, 0x00000000, PPC_FLOAT), |