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Tue, 13 Mar 2018 12:00:18 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1evmLT-0002xA-0e for qemu-devel@nongnu.org; Tue, 13 Mar 2018 12:00:17 -0400 Received: from mout.kundenserver.de ([212.227.126.134]:47197) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1evmLS-0002wD-Me for qemu-devel@nongnu.org; Tue, 13 Mar 2018 12:00:10 -0400 Received: from localhost.localdomain ([78.238.229.36]) by mrelayeu.kundenserver.de (mreue004 [212.227.15.167]) with ESMTPSA (Nemesis) id 0MZhpC-1fDrj514Lm-00LTW2; Tue, 13 Mar 2018 17:00:09 +0100 From: Laurent Vivier To: qemu-devel@nongnu.org Date: Tue, 13 Mar 2018 16:59:14 +0100 Message-Id: <20180313155918.23591-8-laurent@vivier.eu> X-Mailer: git-send-email 2.14.3 In-Reply-To: <20180313155918.23591-1-laurent@vivier.eu> References: <20180313155918.23591-1-laurent@vivier.eu> X-Provags-ID: V03:K0:zMEaGY3B2lZFHulRsg53j/S/i2ma/v9WAKjHNLFYCI6biYZFDhQ dzHwekAE98P9bT3+KOMtuf4TzJu5tLEAI3/U3JbeV/Kw+csgN0B5F7gMIP4BjuKWDfhCkkl oeRA8B5pVs8pynC6D3o8zYHbeNjqPxUAy76gj9zyHpVoz2A0OdASvRAC8+PjFK36fSBGDzn j0J25SXPNHDZ7hm73C8AQ== X-UI-Out-Filterresults: notjunk:1;V01:K0:WpgTlbl0ijc=:kw+jzcA+QLDSSY4NQYkjsT DGwpx8iqSxx9fq0wNoD4LX9tCXWeBq1l/OVZeGJwHEVk0XTRrHJubhSESaEUIiNC19LUBXmeG U5EZ1gNkrnVpU51LAcPB6efb0LBQw2aWExZ0AlvfuZubHqAvbQcomDlWAnAika8OFUhSiMyIF doT2Nf9sbPjlmWi4nles+ldzJlDz4q6ViIwKhgzU1cQJjr+lVEQhgiyQlWE9IbJ+vMUh2zzSC A7AzlLikdVzpWY90xeIkyXVbnrNitcXy92Qew+mxRNEkajdQ4kw7XDH5jzOaAhjH0nONVi5sY ZetQxrOyUFM0m7JFu8sg1WbvtQBvufjC3QpvZXrBEuOEPhh7mcJMRFz9mwgFsS+uJ14B+X25e sfElwhjYPbRMIPlaT1elNmDW0mBfKkl+MUcwzGi8Mi/7P8pZauBIRTEcluzNVTaeMU0IImIGx 8wA4zQr92C5iLPmlV6ZWIaM86EzhrvNTma9dABT0zACfKAPx8dNkUjL2Mn9fznlTEwIbYv76g +u1yM22jWVUuptSSzMcOHaC2AE4sEsElHpZx4bTm4sXWxBJbamgYJ3hR9VJftrkTmNYplFewe Zpd7NMgxRusVOL/vM2TD/jsJ0Mv1agrKb3n7ny4ME3o2tlmzexJAhMqNaBp3FnCQWV1xKXmqJ /4pi9sx7Nke2YTt7kaZyne/JXNZWAflvipydWTrFGByC/JYsOmqrJViW4ugjfjez3N/NXf+be 1xwVPgIiUpdiK1YAeN3hLieLNowJ8lUfiPUd0w== X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 212.227.126.134 Subject: [Qemu-devel] [PULL 07/11] target/m68k: implement facos X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Using a local m68k floatx80_acos() [copied from previous: Written by Andreas Grabher for Previous, NeXT Computer Emulator.] Signed-off-by: Laurent Vivier Message-Id: <20180312202728.23790-8-laurent@vivier.eu> --- target/m68k/fpu_helper.c | 5 ++++ target/m68k/helper.h | 1 + target/m68k/softfloat.c | 70 ++++++++++++++++++++++++++++++++++++++++++++= ++++ target/m68k/softfloat.h | 1 + target/m68k/translate.c | 3 +++ 5 files changed, 80 insertions(+) diff --git a/target/m68k/fpu_helper.c b/target/m68k/fpu_helper.c index 972cc97d96..18ad6999cb 100644 --- a/target/m68k/fpu_helper.c +++ b/target/m68k/fpu_helper.c @@ -628,3 +628,8 @@ void HELPER(fasin)(CPUM68KState *env, FPReg *res, FPReg= *val) { res->d =3D floatx80_asin(val->d, &env->fp_status); } + +void HELPER(facos)(CPUM68KState *env, FPReg *res, FPReg *val) +{ + res->d =3D floatx80_acos(val->d, &env->fp_status); +} diff --git a/target/m68k/helper.h b/target/m68k/helper.h index e1aca375e0..83247a8143 100644 --- a/target/m68k/helper.h +++ b/target/m68k/helper.h @@ -81,6 +81,7 @@ DEF_HELPER_3(fcos, void, env, fp, fp) DEF_HELPER_4(fsincos, void, env, fp, fp, fp) DEF_HELPER_3(fatan, void, env, fp, fp) DEF_HELPER_3(fasin, void, env, fp, fp) +DEF_HELPER_3(facos, void, env, fp, fp) =20 DEF_HELPER_3(mac_move, void, env, i32, i32) DEF_HELPER_3(macmulf, i64, env, i32, i32) diff --git a/target/m68k/softfloat.c b/target/m68k/softfloat.c index 91f0435ac3..3d66f6946f 100644 --- a/target/m68k/softfloat.c +++ b/target/m68k/softfloat.c @@ -23,6 +23,7 @@ #include "fpu/softfloat-macros.h" #include "softfloat_fpsp_tables.h" =20 +#define pi_exp 0x4000 #define piby2_exp 0x3FFF #define pi_sig LIT64(0xc90fdaa22168c235) =20 @@ -2232,3 +2233,72 @@ floatx80 floatx80_asin(floatx80 a, float_status *sta= tus) =20 return a; } + +/*------------------------------------------------------------------------= ---- + | Arc cosine + *------------------------------------------------------------------------= ----*/ + +floatx80 floatx80_acos(floatx80 a, float_status *status) +{ + flag aSign; + int32_t aExp; + uint64_t aSig; + + int8_t user_rnd_mode, user_rnd_prec; + + int32_t compact; + floatx80 fp0, fp1, one; + + aSig =3D extractFloatx80Frac(a); + aExp =3D extractFloatx80Exp(a); + aSign =3D extractFloatx80Sign(a); + + if (aExp =3D=3D 0x7FFF && (uint64_t) (aSig << 1)) { + return propagateFloatx80NaNOneArg(a, status); + } + if (aExp =3D=3D 0 && aSig =3D=3D 0) { + float_raise(float_flag_inexact, status); + return roundAndPackFloatx80(status->floatx80_rounding_precision, 0, + piby2_exp, pi_sig, 0, status); + } + + compact =3D floatx80_make_compact(aExp, aSig); + + if (compact >=3D 0x3FFF8000) { /* |X| >=3D 1 */ + if (aExp =3D=3D one_exp && aSig =3D=3D one_sig) { /* |X| =3D=3D 1 = */ + if (aSign) { /* X =3D=3D -1 */ + a =3D packFloatx80(0, pi_exp, pi_sig); + float_raise(float_flag_inexact, status); + return floatx80_move(a, status); + } else { /* X =3D=3D +1 */ + return packFloatx80(0, 0, 0); + } + } else { /* |X| > 1 */ + float_raise(float_flag_invalid, status); + return floatx80_default_nan(status); + } + } /* |X| < 1 */ + + user_rnd_mode =3D status->float_rounding_mode; + user_rnd_prec =3D status->floatx80_rounding_precision; + status->float_rounding_mode =3D float_round_nearest_even; + status->floatx80_rounding_precision =3D 80; + + one =3D packFloatx80(0, one_exp, one_sig); + fp0 =3D a; + + fp1 =3D floatx80_add(one, fp0, status); /* 1 + X */ + fp0 =3D floatx80_sub(one, fp0, status); /* 1 - X */ + fp0 =3D floatx80_div(fp0, fp1, status); /* (1-X)/(1+X) */ + fp0 =3D floatx80_sqrt(fp0, status); /* SQRT((1-X)/(1+X)) */ + fp0 =3D floatx80_atan(fp0, status); /* ATAN(SQRT((1-X)/(1+X))) */ + + status->float_rounding_mode =3D user_rnd_mode; + status->floatx80_rounding_precision =3D user_rnd_prec; + + a =3D floatx80_add(fp0, fp0, status); /* 2 * ATAN(SQRT((1-X)/(1+X)= )) */ + + float_raise(float_flag_inexact, status); + + return a; +} diff --git a/target/m68k/softfloat.h b/target/m68k/softfloat.h index ca0eb674aa..1140491c81 100644 --- a/target/m68k/softfloat.h +++ b/target/m68k/softfloat.h @@ -39,4 +39,5 @@ floatx80 floatx80_sin(floatx80 a, float_status *status); floatx80 floatx80_cos(floatx80 a, float_status *status); floatx80 floatx80_atan(floatx80 a, float_status *status); floatx80 floatx80_asin(floatx80 a, float_status *status); +floatx80 floatx80_acos(floatx80 a, float_status *status); #endif diff --git a/target/m68k/translate.c b/target/m68k/translate.c index d4169c4533..5fad76c785 100644 --- a/target/m68k/translate.c +++ b/target/m68k/translate.c @@ -5105,6 +5105,9 @@ DISAS_INSN(fpu) case 0x5e: /* fdneg */ gen_helper_fdneg(cpu_env, cpu_dest, cpu_src); break; + case 0x1c: /* facos */ + gen_helper_facos(cpu_env, cpu_dest, cpu_src); + break; case 0x1d: /* fcos */ gen_helper_fcos(cpu_env, cpu_dest, cpu_src); break; --=20 2.14.3