From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46000) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1epFUi-0008T3-Q7 for qemu-devel@nongnu.org; Fri, 23 Feb 2018 10:42:45 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1epFUh-0005lG-NT for qemu-devel@nongnu.org; Fri, 23 Feb 2018 10:42:44 -0500 Received: from mail-wr0-x244.google.com ([2a00:1450:400c:c0c::244]:42892) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1epFUh-0005iY-DM for qemu-devel@nongnu.org; Fri, 23 Feb 2018 10:42:43 -0500 Received: by mail-wr0-x244.google.com with SMTP id k9so14528453wre.9 for ; Fri, 23 Feb 2018 07:42:43 -0800 (PST) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= Date: Fri, 23 Feb 2018 15:36:36 +0000 Message-Id: <20180223153636.29809-32-alex.bennee@linaro.org> In-Reply-To: <20180223153636.29809-1-alex.bennee@linaro.org> References: <20180223153636.29809-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Qemu-devel] [PATCH v3 31/31] arm/translate-a64: add all single op FP16 to handle_fp_1src_half List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-arm@nongnu.org Cc: qemu-devel@nongnu.org, richard.henderson@linaro.org, =?UTF-8?q?Alex=20Benn=C3=A9e?= , Peter Maydell This includes FMOV, FABS, FNEG, FSQRT and FRINT[NPMZAXI]. We re-use existing helpers to achieve this. Signed-off-by: Alex Bennée --- v3 - make fabs a bitwise operation - use read_vec_element_i32 to read value - properly wire into disas_fp_1rc --- target/arm/translate-a64.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c index 6704d66be7..be2bf50ddb 100644 --- a/target/arm/translate-a64.c +++ b/target/arm/translate-a64.c @@ -4596,6 +4596,65 @@ static void disas_fp_csel(DisasContext *s, uint32_t insn) tcg_temp_free_i64(t_true); } +/* Floating-point data-processing (1 source) - half precision */ +static void handle_fp_1src_half(DisasContext *s, int opcode, int rd, int rn) +{ + TCGv_ptr fpst = NULL; + TCGv_i32 tcg_op = tcg_temp_new_i32(); + TCGv_i32 tcg_res = tcg_temp_new_i32(); + + read_vec_element_i32(s, tcg_op, rn, 0, MO_16); + + switch (opcode) { + case 0x0: /* FMOV */ + tcg_gen_mov_i32(tcg_res, tcg_op); + break; + case 0x1: /* FABS */ + tcg_gen_andi_i32(tcg_res, tcg_op, 0x7fff); + break; + case 0x2: /* FNEG */ + tcg_gen_xori_i32(tcg_res, tcg_op, 0x8000); + break; + case 0x3: /* FSQRT */ + gen_helper_sqrt_f16(tcg_res, tcg_op, cpu_env); + break; + case 0x8: /* FRINTN */ + case 0x9: /* FRINTP */ + case 0xa: /* FRINTM */ + case 0xb: /* FRINTZ */ + case 0xc: /* FRINTA */ + { + TCGv_i32 tcg_rmode = tcg_const_i32(arm_rmode_to_sf(opcode & 7)); + fpst = get_fpstatus_ptr(true); + + gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst); + gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst); + + gen_helper_set_rmode(tcg_rmode, tcg_rmode, fpst); + tcg_temp_free_i32(tcg_rmode); + break; + } + case 0xe: /* FRINTX */ + fpst = get_fpstatus_ptr(true); + gen_helper_advsimd_rinth_exact(tcg_res, tcg_op, fpst); + break; + case 0xf: /* FRINTI */ + fpst = get_fpstatus_ptr(true); + gen_helper_advsimd_rinth(tcg_res, tcg_op, fpst); + break; + default: + abort(); + } + + write_fp_sreg(s, rd, tcg_res); + + if (fpst) { + tcg_temp_free_ptr(fpst); + } + tcg_temp_free_i32(tcg_op); + tcg_temp_free_i32(tcg_res); +} + /* Floating-point data-processing (1 source) - single precision */ static void handle_fp_1src_single(DisasContext *s, int opcode, int rd, int rn) { @@ -4825,6 +4884,18 @@ static void disas_fp_1src(DisasContext *s, uint32_t insn) handle_fp_1src_double(s, opcode, rd, rn); break; + case 3: + if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) { + unallocated_encoding(s); + return; + } + + if (!fp_access_check(s)) { + return; + } + + handle_fp_1src_half(s, opcode, rd, rn); + break; default: unallocated_encoding(s); } -- 2.15.1