From patchwork Mon Oct 15 16:39:05 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jia Liu X-Patchwork-Id: 191591 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 520DD2C00B9 for ; Tue, 16 Oct 2012 03:40:29 +1100 (EST) Received: from localhost ([::1]:58703 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TNniN-0006iO-6b for incoming@patchwork.ozlabs.org; Mon, 15 Oct 2012 12:40:27 -0400 Received: from eggs.gnu.org ([208.118.235.92]:34956) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TNni3-0006fH-Bs for qemu-devel@nongnu.org; Mon, 15 Oct 2012 12:40:10 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TNnhv-0005r1-DC for qemu-devel@nongnu.org; Mon, 15 Oct 2012 12:40:07 -0400 Received: from mail-pa0-f45.google.com ([209.85.220.45]:58915) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TNnhv-0005qu-0V for qemu-devel@nongnu.org; Mon, 15 Oct 2012 12:39:59 -0400 Received: by mail-pa0-f45.google.com with SMTP id fb10so4953000pad.4 for ; Mon, 15 Oct 2012 09:39:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references :content-type; bh=Ps//qmG0u88AchoQDHFtnjjno+ChJPNBQLEQh2RShyc=; b=aAM9xjjBKZMdKkIomBT+rvfNpJqOYnTIoXeX46zTFF4U4aonp4iAMDwXUiQVV8yaqw N5yOXTGMalRcnorrjTdfpmjg4IyPsKZqYJA9ILHzlWXhGqBDV/V/CN3jazDZkiMLK+RP MxXAnnBhq1jpm9sRrWtts1J32IbyFlXkC63ibKnpDYDEu3X6z4k73A0cKo/Kebq/BoGz nH+Wz+p/XsQCafxQBn43sh1wzIPfDKUxvLwfF0y2Nh0oOMCZGYP4fDK2bhQI3aPQFtnQ N7TAabYfghdEgWunDW1Fsckuwc1AyhmOfeKS86vm8y/2guuZ97tzHyLoDnypYp7taOCz KIuQ== Received: by 10.66.73.6 with SMTP id h6mr34349580pav.69.1350319198056; Mon, 15 Oct 2012 09:39:58 -0700 (PDT) Received: from localhost.localdomain ([123.150.196.81]) by mx.google.com with ESMTPS id ka4sm9289654pbc.61.2012.10.15.09.39.53 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 15 Oct 2012 09:39:56 -0700 (PDT) From: Jia Liu To: qemu-devel@nongnu.org Date: Tue, 16 Oct 2012 00:39:05 +0800 Message-Id: <1350319158-7263-2-git-send-email-proljc@gmail.com> X-Mailer: git-send-email 1.7.10.2 (Apple Git-33) In-Reply-To: <1350319158-7263-1-git-send-email-proljc@gmail.com> References: <1350319158-7263-1-git-send-email-proljc@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 209.85.220.45 Cc: aurelien@aurel32.net Subject: [Qemu-devel] [PATCH v11 01/14] target-mips: Add ASE DSP internal functions X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Add internal functions using by MIPS ASE DSP instructions. Signed-off-by: Jia Liu --- target-mips/Makefile.objs | 2 +- target-mips/dsp_helper.c | 1086 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 1087 insertions(+), 1 deletion(-) create mode 100644 target-mips/dsp_helper.c diff --git a/target-mips/Makefile.objs b/target-mips/Makefile.objs index 3eeeeac..119c816 100644 --- a/target-mips/Makefile.objs +++ b/target-mips/Makefile.objs @@ -1,2 +1,2 @@ -obj-y += translate.o op_helper.o lmi_helper.o helper.o cpu.o +obj-y += translate.o dsp_helper.o op_helper.o lmi_helper.o helper.o cpu.o obj-$(CONFIG_SOFTMMU) += machine.o diff --git a/target-mips/dsp_helper.c b/target-mips/dsp_helper.c new file mode 100644 index 0000000..1c656a0 --- /dev/null +++ b/target-mips/dsp_helper.c @@ -0,0 +1,1086 @@ +/* + * MIPS ASE DSP Instruction emulation helpers for QEMU. + * + * Copyright (c) 2012 Jia Liu + * Dongxue Zhang + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see . + */ + +#include "cpu.h" +#include "helper.h" + +/*** MIPS DSP internal functions begin ***/ +#define MIPSDSP_ABS(x) (((x) >= 0) ? x : -x) +#define MIPSDSP_OVERFLOW(a, b, c, d) (!(!((a ^ b ^ -1) & (a ^ c) & d))) + +static inline void set_DSPControl_overflow_flag(uint32_t flag, int position, + CPUMIPSState *env) +{ + env->active_tc.DSPControl |= (target_ulong)flag << position; +} + +static inline void set_DSPControl_carryflag(uint32_t flag, CPUMIPSState *env) +{ + env->active_tc.DSPControl |= (target_ulong)flag << 13; +} + +static inline uint32_t get_DSPControl_carryflag(CPUMIPSState *env) +{ + return (env->active_tc.DSPControl >> 13) & 0x01; +} + +static inline void set_DSPControl_24(uint32_t flag, int len, CPUMIPSState *env) +{ + uint32_t filter; + + filter = ((0x01 << len) - 1) << 24; + filter = ~filter; + + env->active_tc.DSPControl &= filter; + env->active_tc.DSPControl |= (target_ulong)flag << 24; +} + +static inline uint32_t get_DSPControl_24(int len, CPUMIPSState *env) +{ + uint32_t filter; + + filter = (0x01 << len) - 1; + + return (env->active_tc.DSPControl >> 24) & filter; +} + +static inline void set_DSPControl_pos(uint32_t pos, CPUMIPSState *env) +{ + target_ulong dspc; + + dspc = env->active_tc.DSPControl; +#ifndef TARGET_MIPS64 + dspc = dspc & 0xFFFFFFC0; + dspc |= pos; +#else + dspc = dspc & 0xFFFFFF80; + dspc |= pos; +#endif + env->active_tc.DSPControl = dspc; +} + +static inline uint32_t get_DSPControl_pos(CPUMIPSState *env) +{ + target_ulong dspc; + uint32_t pos; + + dspc = env->active_tc.DSPControl; + +#ifndef TARGET_MIPS64 + pos = dspc & 0x3F; +#else + pos = dspc & 0x7F; +#endif + + return pos; +} + +static inline void set_DSPControl_efi(uint32_t flag, CPUMIPSState *env) +{ + env->active_tc.DSPControl &= 0xFFFFBFFF; + env->active_tc.DSPControl |= (target_ulong)flag << 14; +} + +#define DO_MIPS_SAT_ABS(size) \ +static inline int##size##_t mipsdsp_sat_abs##size(int##size##_t a, \ + CPUMIPSState *env) \ +{ \ + if (a == INT##size##_MIN) { \ + set_DSPControl_overflow_flag(1, 20, env); \ + return INT##size##_MAX; \ + } else { \ + return MIPSDSP_ABS(a); \ + } \ +} +DO_MIPS_SAT_ABS(8) +DO_MIPS_SAT_ABS(16) +DO_MIPS_SAT_ABS(32) +#undef DO_MIPS_SAT_ABS + +/* get sum value */ +static inline int16_t mipsdsp_add_i16(int16_t a, int16_t b, CPUMIPSState *env) +{ + int16_t tempI; + + tempI = a + b; + + if (MIPSDSP_OVERFLOW(a, b, tempI, 0x8000)) { + set_DSPControl_overflow_flag(1, 20, env); + } + + return tempI; +} + +static inline int16_t mipsdsp_sat_add_i16(int16_t a, int16_t b, + CPUMIPSState *env) +{ + int16_t tempS; + + tempS = a + b; + + if (MIPSDSP_OVERFLOW(a, b, tempS, 0x8000)) { + if (a > 0) { + tempS = 0x7FFF; + } else { + tempS = 0x8000; + } + set_DSPControl_overflow_flag(1, 20, env); + } + + return tempS; +} + +static inline int32_t mipsdsp_sat_add_i32(int32_t a, int32_t b, + CPUMIPSState *env) +{ + int32_t tempI; + + tempI = a + b; + + if (MIPSDSP_OVERFLOW(a, b, tempI, 0x80000000)) { + if (a > 0) { + tempI = 0x7FFFFFFF; + } else { + tempI = 0x80000000; + } + set_DSPControl_overflow_flag(1, 20, env); + } + + return tempI; +} + +static inline uint8_t mipsdsp_add_u8(uint8_t a, uint8_t b, CPUMIPSState *env) +{ + uint16_t temp; + + temp = (uint16_t)a + (uint16_t)b; + + if (temp & 0x0100) { + set_DSPControl_overflow_flag(1, 20, env); + } + + return temp & 0xFF; +} + +static inline uint16_t mipsdsp_add_u16(uint16_t a, uint16_t b, + CPUMIPSState *env) +{ + uint32_t temp; + + temp = (uint32_t)a + (uint32_t)b; + + if (temp & 0x00010000) { + set_DSPControl_overflow_flag(1, 20, env); + } + + return temp & 0xFFFF; +} + +static inline uint8_t mipsdsp_sat_add_u8(uint8_t a, uint8_t b, + CPUMIPSState *env) +{ + uint8_t result; + uint16_t temp; + + temp = (uint16_t)a + (uint16_t)b; + result = temp & 0xFF; + + if (0x0100 & temp) { + result = 0xFF; + set_DSPControl_overflow_flag(1, 20, env); + } + + return result; +} + +static inline uint16_t mipsdsp_sat_add_u16(uint16_t a, uint16_t b, + CPUMIPSState *env) +{ + uint16_t result; + uint32_t temp; + + temp = (uint32_t)a + (uint32_t)b; + result = temp & 0xFFFF; + + if (0x00010000 & temp) { + result = 0xFFFF; + set_DSPControl_overflow_flag(1, 20, env); + } + + return result; +} + +static inline int32_t mipsdsp_sat32_acc_q31(int32_t acc, int32_t a, + CPUMIPSState *env) +{ + int64_t temp; + int32_t temp32, temp31, result; + int64_t temp_sum; + +#ifndef TARGET_MIPS64 + temp = ((uint64_t)env->active_tc.HI[acc] << 32) | + (uint64_t)env->active_tc.LO[acc]; +#else + temp = (uint64_t)env->active_tc.LO[acc]; +#endif + + temp_sum = (int64_t)a + temp; + + temp32 = (temp_sum >> 32) & 0x01; + temp31 = (temp_sum >> 31) & 0x01; + result = temp_sum & 0xFFFFFFFF; + + if (temp32 != temp31) { + if (temp32 == 0) { + result = 0x7FFFFFFF; + } else { + result = 0x80000000; + } + set_DSPControl_overflow_flag(1, 16 + acc, env); + } + + return result; +} + +/* a[0] is LO, a[1] is HI. */ +static inline void mipsdsp_sat64_acc_add_q63(int64_t *ret, + int32_t ac, + int64_t *a, + CPUMIPSState *env) +{ + int64_t temp[3]; + int64_t acc[3]; + int64_t temp_sum; + + temp[0] = a[0]; + temp[1] = a[1]; + if (temp[1] >= 0) { + temp[2] = 0x00; + } else { + temp[2] = ~0ull; + } + + acc[0] = env->active_tc.LO[ac]; + acc[1] = env->active_tc.HI[ac]; + if (acc[1] >= 0) { + acc[2] = 0x00; + } else { + acc[2] = ~0ull; + } + + temp_sum = temp[0] + acc[0]; + if (((uint64_t)temp_sum < (uint64_t)temp[0]) && + ((uint64_t)temp_sum < (uint64_t)acc[0])) { + temp[1] += 1; + if (temp[1] == 0) { + temp[2] += 1; + } + } + temp[0] = temp_sum; + + temp_sum = temp[1] + acc[1]; + if (((uint64_t)temp_sum < (uint64_t)temp[1]) && + ((uint64_t)temp_sum < (uint64_t)acc[1])) { + temp[2] += 1; + } + + if (MIPSDSP_OVERFLOW(temp[1], acc[1], temp_sum, INT64_MIN)) { + if (temp[1] > 0) { + ret[0] = 0x0; + ret[1] = 0x7FFFFFFFFFFFFFFFull; + } else { + ret[0] = 0x8000000000000000ull; + ret[1] = ~0ull; + } + set_DSPControl_overflow_flag(1, 16 + ac, env); + } else { + ret[0] = temp[0]; + ret[1] = temp_sum; + } +} + +/* a[0] is LO, a[1] is HI. */ +static inline void mipsdsp_sat64_acc_sub_q63(int64_t *ret, + int32_t ac, + int64_t *a, + CPUMIPSState *env) +{ + uint32_t temp64, temp63; + int64_t temp[2]; + int64_t acc[2]; + int64_t temp_sum; + + temp[0] = a[0]; + temp[1] = a[1]; + + acc[0] = env->active_tc.LO[ac]; + acc[1] = env->active_tc.HI[ac]; + + temp_sum = acc[0] - temp[0]; + if (MIPSDSP_OVERFLOW(acc[0], -temp[0], temp_sum, 0x8000000000000000ull)) { + acc[1] -= 1; + } + acc[0] = temp_sum; + + temp_sum = acc[1] - temp[1]; + acc[1] = temp_sum; + + temp64 = acc[1] & 0x01; + temp63 = (acc[0] >> 63) & 0x01; + + /* MIPSDSP_OVERFLOW only can check if a 64 bits sub is overflow, + * there are two 128 bits value subed then check the 63/64 bits are equal + * or not.*/ + if (temp64 != temp63) { + if (temp64 == 1) { + ret[0] = 0x8000000000000000ull; + ret[1] = ~0ull; + } else { + ret[0] = 0x0; + ret[1] = 0x7FFFFFFFFFFFFFFFull; + } + set_DSPControl_overflow_flag(1, 16 + ac, env); + } else { + ret[0] = acc[0]; + ret[1] = acc[1]; + } +} + +static inline int32_t mipsdsp_mul_i16_i16(int16_t a, int16_t b, + CPUMIPSState *env) +{ + int32_t temp; + + temp = (int32_t)a * (int32_t)b; + + if ((temp > 0x7FFF) || (temp < 0xFFFF8000)) { + set_DSPControl_overflow_flag(1, 21, env); + } + temp &= 0x0000FFFF; + + return temp; +} + +static inline int32_t mipsdsp_mul_u16_u16(int32_t a, int32_t b) +{ + return a * b; +} + +static inline int32_t mipsdsp_mul_i32_i32(int32_t a, int32_t b) +{ + return a * b; +} + +static inline int32_t mipsdsp_sat16_mul_i16_i16(int16_t a, int16_t b, + CPUMIPSState *env) +{ + int32_t temp; + + temp = (int32_t)a * (int32_t)b; + + if (temp > 0x7FFF) { + temp = 0x00007FFF; + set_DSPControl_overflow_flag(1, 21, env); + } else if (temp < 0x00007FFF) { + temp = 0xFFFF8000; + set_DSPControl_overflow_flag(1, 21, env); + } + temp &= 0x0000FFFF; + + return temp; +} + +static inline int32_t mipsdsp_mul_q15_q15_overflowflag21(uint16_t a, uint16_t b, + CPUMIPSState *env) +{ + int32_t temp; + + if ((a == 0x8000) && (b == 0x8000)) { + temp = 0x7FFFFFFF; + set_DSPControl_overflow_flag(1, 21, env); + } else { + temp = ((int32_t)(int16_t)a * (int32_t)(int16_t)b) << 1; + } + + return temp; +} + +/* right shift */ +static inline uint8_t mipsdsp_rshift_u8(uint8_t a, target_ulong mov) +{ + return a >> mov; +} + +static inline uint16_t mipsdsp_rshift_u16(uint16_t a, target_ulong mov) +{ + return a >> mov; +} + +static inline int8_t mipsdsp_rashift8(int8_t a, target_ulong mov) +{ + return a >> mov; +} + +static inline int16_t mipsdsp_rashift16(int16_t a, target_ulong mov) +{ + return a >> mov; +} + +static inline int32_t mipsdsp_rashift32(int32_t a, target_ulong mov) +{ + return a >> mov; +} + +static inline int16_t mipsdsp_rshift1_add_q16(int16_t a, int16_t b) +{ + int32_t temp; + + temp = (int32_t)a + (int32_t)b; + + return (temp >> 1) & 0xFFFF; +} + +/* round right shift */ +static inline int16_t mipsdsp_rrshift1_add_q16(int16_t a, int16_t b) +{ + int32_t temp; + + temp = (int32_t)a + (int32_t)b; + temp += 1; + + return (temp >> 1) & 0xFFFF; +} + +static inline int32_t mipsdsp_rshift1_add_q32(int32_t a, int32_t b) +{ + int64_t temp; + + temp = (int64_t)a + (int64_t)b; + + return (temp >> 1) & 0xFFFFFFFF; +} + +static inline int32_t mipsdsp_rrshift1_add_q32(int32_t a, int32_t b) +{ + int64_t temp; + + temp = (int64_t)a + (int64_t)b; + temp += 1; + + return (temp >> 1) & 0xFFFFFFFF; +} + +static inline uint8_t mipsdsp_rshift1_add_u8(uint8_t a, uint8_t b) +{ + uint16_t temp; + + temp = (uint16_t)a + (uint16_t)b; + + return (temp >> 1) & 0x00FF; +} + +static inline uint8_t mipsdsp_rrshift1_add_u8(uint8_t a, uint8_t b) +{ + uint16_t temp; + + temp = (uint16_t)a + (uint16_t)b + 1; + + return (temp >> 1) & 0x00FF; +} + +static inline uint8_t mipsdsp_rshift1_sub_u8(uint8_t a, uint8_t b) +{ + uint16_t temp; + + temp = (uint16_t)a - (uint16_t)b; + + return (temp >> 1) & 0x00FF; +} + +static inline uint8_t mipsdsp_rrshift1_sub_u8(uint8_t a, uint8_t b) +{ + uint16_t temp; + + temp = (uint16_t)a - (uint16_t)b + 1; + + return (temp >> 1) & 0x00FF; +} + +static inline int64_t mipsdsp_rashift_short_acc(int32_t ac, + int32_t shift, + CPUMIPSState *env) +{ + int32_t sign, temp31; + int64_t temp, acc; + + sign = (env->active_tc.HI[ac] >> 31) & 0x01; + acc = ((int64_t)env->active_tc.HI[ac] << 32) | + ((int64_t)env->active_tc.LO[ac] & 0xFFFFFFFF); + if (shift == 0) { + temp = acc; + } else { + if (sign == 0) { + temp = (((int64_t)0x01 << (32 - shift + 1)) - 1) & (acc >> shift); + } else { + temp = ((((int64_t)0x01 << (shift + 1)) - 1) << (32 - shift)) | + (acc >> shift); + } + } + + temp31 = (temp >> 31) & 0x01; + if (sign != temp31) { + set_DSPControl_overflow_flag(1, 23, env); + } + + return temp; +} + +/* 128 bits long. p[0] is LO, p[1] is HI. */ +static inline void mipsdsp_rndrashift_short_acc(int64_t *p, + int32_t ac, + int32_t shift, + CPUMIPSState *env) +{ + int64_t acc; + + acc = ((int64_t)env->active_tc.HI[ac] << 32) | + ((int64_t)env->active_tc.LO[ac] & 0xFFFFFFFF); + if (shift == 0) { + p[0] = acc << 1; + p[1] = (acc >> 63) & 0x01; + } else { + p[0] = acc >> (shift - 1); + p[1] = 0; + } +} + +/* 128 bits long. p[0] is LO, p[1] is HI */ +static inline void mipsdsp_rashift_acc(uint64_t *p, + uint32_t ac, + uint32_t shift, + CPUMIPSState *env) +{ + uint64_t tempB, tempA; + + tempB = env->active_tc.HI[ac]; + tempA = env->active_tc.LO[ac]; + shift = shift & 0x1F; + + if (shift == 0) { + p[1] = tempB; + p[0] = tempA; + } else { + p[0] = (tempB << (64 - shift)) | (tempA >> shift); + p[1] = (int64_t)tempB >> shift; + } +} + +/* 128 bits long. p[0] is LO, p[1] is HI , p[2] is sign of HI.*/ +static inline void mipsdsp_rndrashift_acc(uint64_t *p, + uint32_t ac, + uint32_t shift, + CPUMIPSState *env) +{ + int64_t tempB, tempA; + + tempB = env->active_tc.HI[ac]; + tempA = env->active_tc.LO[ac]; + shift = shift & 0x3F; + + if (shift == 0) { + p[2] = tempB >> 63; + p[1] = (tempB << 1) | (tempA >> 63); + p[0] = tempA << 1; + } else { + p[0] = (tempB << (65 - shift)) | (tempA >> (shift - 1)); + p[1] = (int64_t)tempB >> (shift - 1); + if (tempB >= 0) { + p[2] = 0x0; + } else { + p[2] = ~0ull; + } + } +} + +static inline int32_t mipsdsp_mul_q15_q15(int32_t ac, uint16_t a, uint16_t b, + CPUMIPSState *env) +{ + int32_t temp; + + if ((a == 0x8000) && (b == 0x8000)) { + temp = 0x7FFFFFFF; + set_DSPControl_overflow_flag(1, 16 + ac, env); + } else { + temp = ((uint32_t)a * (uint32_t)b) << 1; + } + + return temp; +} + +static inline int64_t mipsdsp_mul_q31_q31(int32_t ac, uint32_t a, uint32_t b, + CPUMIPSState *env) +{ + uint64_t temp; + + if ((a == 0x80000000) && (b == 0x80000000)) { + temp = 0x7FFFFFFFFFFFFFFFull; + set_DSPControl_overflow_flag(1, 16 + ac, env); + } else { + temp = ((uint64_t)a * (uint64_t)b) << 1; + } + + return temp; +} + +static inline uint16_t mipsdsp_mul_u8_u8(uint8_t a, uint8_t b) +{ + return (uint16_t)a * (uint16_t)b; +} + +static inline uint16_t mipsdsp_mul_u8_u16(uint8_t a, uint16_t b, + CPUMIPSState *env) +{ + uint32_t tempI; + + tempI = (uint32_t)a * (uint32_t)b; + if (tempI > 0x0000FFFF) { + tempI = 0x0000FFFF; + set_DSPControl_overflow_flag(1, 21, env); + } + + return tempI & 0x0000FFFF; +} + +static inline uint64_t mipsdsp_mul_u32_u32(uint32_t a, uint32_t b) +{ + return (uint64_t)a * (uint64_t)b; +} + +static inline int16_t mipsdsp_rndq15_mul_q15_q15(uint16_t a, uint16_t b, + CPUMIPSState *env) +{ + uint32_t temp; + + if ((a == 0x8000) && (b == 0x8000)) { + temp = 0x7FFF0000; + set_DSPControl_overflow_flag(1, 21, env); + } else { + temp = (a * b) << 1; + temp = temp + 0x00008000; + } + + return (temp & 0xFFFF0000) >> 16; +} + +static inline int32_t mipsdsp_sat16_mul_q15_q15(uint16_t a, uint16_t b, + CPUMIPSState *env) +{ + int32_t temp; + + if ((a == 0x8000) && (b == 0x8000)) { + temp = 0x7FFF0000; + set_DSPControl_overflow_flag(1, 21, env); + } else { + temp = ((uint32_t)a * (uint32_t)b); + temp = temp << 1; + } + + return (temp >> 16) & 0x0000FFFF; +} + +static inline uint16_t mipsdsp_trunc16_sat16_round(int32_t a, + CPUMIPSState *env) +{ + int64_t temp; + + temp = (int32_t)a + 0x00008000; + + if (a > 0x7fff8000) { + temp = 0x7FFFFFFF; + set_DSPControl_overflow_flag(1, 22, env); + } + + return (temp >> 16) & 0xFFFF; +} + +static inline uint8_t mipsdsp_sat8_reduce_precision(uint16_t a, + CPUMIPSState *env) +{ + uint16_t mag; + uint32_t sign; + + sign = (a >> 15) & 0x01; + mag = a & 0x7FFF; + + if (sign == 0) { + if (mag > 0x7F80) { + set_DSPControl_overflow_flag(1, 22, env); + return 0xFF; + } else { + return (mag >> 7) & 0xFFFF; + } + } else { + set_DSPControl_overflow_flag(1, 22, env); + return 0x00; + } +} + +static inline uint8_t mipsdsp_lshift8(uint8_t a, uint8_t s, CPUMIPSState *env) +{ + uint8_t sign; + uint8_t discard; + + if (s == 0) { + return a; + } else { + sign = (a >> 7) & 0x01; + if (sign != 0) { + discard = (((0x01 << (8 - s)) - 1) << s) | + ((a >> (6 - (s - 1))) & ((0x01 << s) - 1)); + } else { + discard = a >> (6 - (s - 1)); + } + + if (discard != 0x00) { + set_DSPControl_overflow_flag(1, 22, env); + } + return a << s; + } +} + +static inline uint16_t mipsdsp_lshift16(uint16_t a, uint8_t s, + CPUMIPSState *env) +{ + uint8_t sign; + uint16_t discard; + + if (s == 0) { + return a; + } else { + sign = (a >> 15) & 0x01; + if (sign != 0) { + discard = (((0x01 << (16 - s)) - 1) << s) | + ((a >> (14 - (s - 1))) & ((0x01 << s) - 1)); + } else { + discard = a >> (14 - (s - 1)); + } + + if ((discard != 0x0000) && (discard != 0xFFFF)) { + set_DSPControl_overflow_flag(1, 22, env); + } + return a << s; + } +} + + +static inline uint32_t mipsdsp_lshift32(uint32_t a, uint8_t s, + CPUMIPSState *env) +{ + uint32_t discard; + + if (s == 0) { + return a; + } else { + discard = (int32_t)a >> (31 - (s - 1)); + + if ((discard != 0x00000000) && (discard != 0xFFFFFFFF)) { + set_DSPControl_overflow_flag(1, 22, env); + } + return a << s; + } +} + +static inline uint16_t mipsdsp_sat16_lshift(uint16_t a, uint8_t s, + CPUMIPSState *env) +{ + uint8_t sign; + uint16_t discard; + + if (s == 0) { + return a; + } else { + sign = (a >> 15) & 0x01; + if (sign != 0) { + discard = (((0x01 << (16 - s)) - 1) << s) | + ((a >> (14 - (s - 1))) & ((0x01 << s) - 1)); + } else { + discard = a >> (14 - (s - 1)); + } + + if ((discard != 0x0000) && (discard != 0xFFFF)) { + set_DSPControl_overflow_flag(1, 22, env); + return (sign == 0) ? 0x7FFF : 0x8000; + } else { + return a << s; + } + } +} + +static inline uint32_t mipsdsp_sat32_lshift(uint32_t a, uint8_t s, + CPUMIPSState *env) +{ + uint8_t sign; + uint32_t discard; + + if (s == 0) { + return a; + } else { + sign = (a >> 31) & 0x01; + if (sign != 0) { + discard = (((0x01 << (32 - s)) - 1) << s) | + ((a >> (30 - (s - 1))) & ((0x01 << s) - 1)); + } else { + discard = a >> (30 - (s - 1)); + } + + if ((discard != 0x00000000) && (discard != 0xFFFFFFFF)) { + set_DSPControl_overflow_flag(1, 22, env); + return (sign == 0) ? 0x7FFFFFFF : 0x80000000; + } else { + return a << s; + } + } +} + +static inline uint8_t mipsdsp_rnd8_rashift(uint8_t a, uint8_t s) +{ + uint32_t temp; + + if (s == 0) { + temp = (uint32_t)a << 1; + } else { + temp = (int32_t)(int8_t)a >> (s - 1); + } + + return (temp + 1) >> 1; +} + +static inline uint16_t mipsdsp_rnd16_rashift(uint16_t a, uint8_t s) +{ + uint32_t temp; + + if (s == 0) { + temp = (uint32_t)a << 1; + } else { + temp = (int32_t)(int16_t)a >> (s - 1); + } + + return (temp + 1) >> 1; +} + +static inline uint32_t mipsdsp_rnd32_rashift(uint32_t a, uint8_t s) +{ + int64_t temp; + + if (s == 0) { + temp = a << 1; + } else { + temp = (int64_t)(int32_t)a >> (s - 1); + } + temp += 1; + + return (temp >> 1) & 0x00000000FFFFFFFFull; +} + +static inline uint16_t mipsdsp_sub_i16(int16_t a, int16_t b, CPUMIPSState *env) +{ + int16_t temp; + + temp = a - b; + if (MIPSDSP_OVERFLOW(a, -b, temp, 0x8000)) { + set_DSPControl_overflow_flag(1, 20, env); + } + + return temp; +} + +static inline uint16_t mipsdsp_sat16_sub(int16_t a, int16_t b, + CPUMIPSState *env) +{ + int16_t temp; + + temp = a - b; + if (MIPSDSP_OVERFLOW(a, -b, temp, 0x8000)) { + if (a > 0) { + temp = 0x7FFF; + } else { + temp = 0x8000; + } + set_DSPControl_overflow_flag(1, 20, env); + } + + return temp; +} + +static inline uint32_t mipsdsp_sat32_sub(int32_t a, int32_t b, + CPUMIPSState *env) +{ + int32_t temp; + + temp = a - b; + if (MIPSDSP_OVERFLOW(a, -b, temp, 0x80000000)) { + if (a > 0) { + temp = 0x7FFFFFFF; + } else { + temp = 0x80000000; + } + set_DSPControl_overflow_flag(1, 20, env); + } + + return temp & 0x00000000FFFFFFFFull; +} + +static inline uint16_t mipsdsp_rshift1_sub_q16(int16_t a, int16_t b) +{ + int32_t temp; + + temp = (int32_t)a - (int32_t)b; + + return (temp >> 1) & 0x0000FFFF; +} + +static inline uint16_t mipsdsp_rrshift1_sub_q16(int16_t a, int16_t b) +{ + int32_t temp; + + temp = (int32_t)a - (int32_t)b; + temp += 1; + + return (temp >> 1) & 0x0000FFFF; +} + +static inline uint32_t mipsdsp_rshift1_sub_q32(int32_t a, int32_t b) +{ + int64_t temp; + + temp = (int64_t)a - (int64_t)b; + + return (temp >> 1) & 0x00000000FFFFFFFFull; +} + +static inline uint32_t mipsdsp_rrshift1_sub_q32(int32_t a, int32_t b) +{ + int64_t temp; + + temp = (int64_t)a - (int64_t)b; + temp += 1; + + return (temp >> 1) & 0x00000000FFFFFFFFull; +} + +static inline uint16_t mipsdsp_sub_u16_u16(uint16_t a, uint16_t b, + CPUMIPSState *env) +{ + uint8_t temp16; + uint32_t temp; + + temp = (uint32_t)a - (uint32_t)b; + temp16 = (temp >> 16) & 0x01; + if (temp16 == 1) { + set_DSPControl_overflow_flag(1, 20, env); + } + return temp & 0x0000FFFF; +} + +static inline uint16_t mipsdsp_satu16_sub_u16_u16(uint16_t a, uint16_t b, + CPUMIPSState *env) +{ + uint8_t temp16; + uint32_t temp; + + temp = (uint32_t)a - (uint32_t)b; + temp16 = (temp >> 16) & 0x01; + + if (temp16 == 1) { + temp = 0x0000; + set_DSPControl_overflow_flag(1, 20, env); + } + + return temp & 0x0000FFFF; +} + +static inline uint8_t mipsdsp_sub_u8(uint8_t a, uint8_t b, CPUMIPSState *env) +{ + uint8_t temp8; + uint16_t temp; + + temp = (uint16_t)a - (uint16_t)b; + temp8 = (temp >> 8) & 0x01; + if (temp8 == 1) { + set_DSPControl_overflow_flag(1, 20, env); + } + + return temp & 0x00FF; +} + +static inline uint8_t mipsdsp_satu8_sub(uint8_t a, uint8_t b, CPUMIPSState *env) +{ + uint8_t temp8; + uint16_t temp; + + temp = (uint16_t)a - (uint16_t)b; + temp8 = (temp >> 8) & 0x01; + if (temp8 == 1) { + temp = 0x00; + set_DSPControl_overflow_flag(1, 20, env); + } + + return temp & 0x00FF; +} + +static inline uint32_t mipsdsp_sub32(int32_t a, int32_t b, CPUMIPSState *env) +{ + int32_t temp; + + temp = a - b; + if (MIPSDSP_OVERFLOW(a, -b, temp, 0x80000000)) { + set_DSPControl_overflow_flag(1, 20, env); + } + + return temp; +} + +static inline int32_t mipsdsp_add_i32(int32_t a, int32_t b, CPUMIPSState *env) +{ + int32_t temp; + + temp = a + b; + + if (MIPSDSP_OVERFLOW(a, b, temp, 0x80000000)) { + set_DSPControl_overflow_flag(1, 20, env); + } + + return temp; +} + +static inline int32_t mipsdsp_cmp_eq(uint32_t a, uint32_t b) +{ + return a == b; +} + +static inline int32_t mipsdsp_cmp_le(uint32_t a, uint32_t b) +{ + return a <= b; +} + +static inline int32_t mipsdsp_cmp_lt(uint32_t a, uint32_t b) +{ + return a < b; +} +/*** MIPS DSP internal functions end ***/