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Violators will be prosecuted for from ; Fri, 28 Oct 2016 15:18:46 -0200 From: Jose Ricardo Ziviani Date: Fri, 28 Oct 2016 15:18:02 -0200 In-Reply-To: <1477675084-7713-1-git-send-email-joserz@linux.vnet.ibm.com> References: <1477675084-7713-1-git-send-email-joserz@linux.vnet.ibm.com> Message-Id: <1477675084-7713-3-git-send-email-joserz@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v2 2/4] target-ppc: Implement bcdctn. instruction List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-ppc@nongnu.org Cc: qemu-devel@nongnu.org, david@gibson.dropbear.id.au, nikunj@linux.vnet.ibm.com, bharata@linux.vnet.ibm.com bcdctn. converts from BCD to National numeric format. National format uses a byte to represent a digit where the most significant nibble is always 0x3 and the least sign. nibbles is the digit itself. Signed-off-by: Jose Ricardo Ziviani --- target-ppc/helper.h | 1 + target-ppc/int_helper.c | 48 +++++++++++++++++++++++++++++++++++++ target-ppc/translate/vmx-impl.inc.c | 24 ++++++++++++++++++- 3 files changed, 72 insertions(+), 1 deletion(-) diff --git a/target-ppc/helper.h b/target-ppc/helper.h index 3b23eed..53d1e7a 100644 --- a/target-ppc/helper.h +++ b/target-ppc/helper.h @@ -372,6 +372,7 @@ DEF_HELPER_4(vpermxor, void, avr, avr, avr, avr) DEF_HELPER_4(bcdadd, i32, avr, avr, avr, i32) DEF_HELPER_4(bcdsub, i32, avr, avr, avr, i32) DEF_HELPER_3(bcdcfn, i32, avr, avr, i32) +DEF_HELPER_2(bcdctn, i32, avr, avr) DEF_HELPER_2(xsadddp, void, env, i32) DEF_HELPER_2(xssubdp, void, env, i32) diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c index 9d620a6..a58ed30 100644 --- a/target-ppc/int_helper.c +++ b/target-ppc/int_helper.c @@ -2506,6 +2506,15 @@ static uint8_t get_national_digit(ppc_avr_t *reg, int n) #endif } +static void set_national_digit(ppc_avr_t *reg, uint8_t val, int n) +{ +#if defined(HOST_WORDS_BIGENDIAN) + reg->u16[8 - n] = val; +#else + reg->u16[n] = val; +#endif +} + static int bcd_cmp_mag(ppc_avr_t *a, ppc_avr_t *b) { int i; @@ -2679,6 +2688,45 @@ uint32_t helper_bcdcfn(ppc_avr_t *r, ppc_avr_t *b, uint32_t ps) return cr; } +uint32_t helper_bcdctn(ppc_avr_t *r, ppc_avr_t *b) +{ + int i; + int cr = 0; + int sgnb = bcd_get_sgn(b); + int invalid = (sgnb == 0); + ppc_avr_t ret = { .u64 = { 0, 0 } }; + + int eq_flag = (b->u64[HI_IDX] == 0) && ((b->u64[LO_IDX] >> 4) == 0); + int ox_flag = (b->u64[HI_IDX] != 0) || ((b->u64[LO_IDX] >> 32) != 0); + + for (i = 1; i < 8; i++) { + set_national_digit(&ret, 0x30 + bcd_get_digit(b, i, &invalid), i); + + if (unlikely(invalid)) { + break; + } + } + set_national_digit(&ret, (sgnb == -1) ? NATIONAL_NEG : NATIONAL_PLUS, 0); + + if (!eq_flag) { + cr = (sgnb == -1) ? 1 << CRF_LT : 1 << CRF_GT; + } else { + cr = 1 << CRF_EQ; + } + + if (ox_flag) { + cr |= 1 << CRF_SO; + } + + if (unlikely(invalid)) { + cr = 1 << CRF_SO; + } + + *r = ret; + + return cr; +} + void helper_vsbox(ppc_avr_t *r, ppc_avr_t *a) { int i; diff --git a/target-ppc/translate/vmx-impl.inc.c b/target-ppc/translate/vmx-impl.inc.c index 06d28f2..e37fc11 100644 --- a/target-ppc/translate/vmx-impl.inc.c +++ b/target-ppc/translate/vmx-impl.inc.c @@ -968,9 +968,29 @@ static void gen_##op(DisasContext *ctx) \ tcg_temp_free_i32(ps); \ } +#define GEN_BCD3(op) \ +static void gen_##op(DisasContext *ctx) \ +{ \ + TCGv_ptr rb, rd; \ + \ + if (unlikely(!ctx->altivec_enabled)) { \ + gen_exception(ctx, POWERPC_EXCP_VPU); \ + return; \ + } \ + \ + rb = gen_avr_ptr(rB(ctx->opcode)); \ + rd = gen_avr_ptr(rD(ctx->opcode)); \ + \ + gen_helper_##op(cpu_crf[6], rd, rb); \ + \ + tcg_temp_free_ptr(rb); \ + tcg_temp_free_ptr(rd); \ +} + GEN_BCD(bcdadd) GEN_BCD(bcdsub) GEN_BCD2(bcdcfn) +GEN_BCD3(bcdctn) static void gen_xpnd04_1(DisasContext *ctx) { @@ -982,7 +1002,8 @@ static void gen_xpnd04_1(DisasContext *ctx) case 4: break; /* bcdctz. */ case 5: - break; /* bcdctn. */ + gen_bcdctn(ctx); + break; case 6: break; /* bcdcfz. */ case 7: @@ -1098,3 +1119,4 @@ GEN_VXFORM_DUAL(vsldoi, PPC_ALTIVEC, PPC_NONE, #undef GEN_VAFORM_PAIRED #undef GEN_BCD2 +#undef GEN_BCD3 -- 2.7.4