2014-11-01 08:28:41 +03:00
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/*
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* MIPS SIMD Architecture Module Instruction emulation helpers for QEMU.
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*
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* Copyright (c) 2014 Imagination Technologies
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "cpu.h"
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#include "exec/helper-proto.h"
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/* Data format min and max values */
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#define DF_BITS(df) (1 << ((df) + 3))
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#define DF_MAX_INT(df) (int64_t)((1LL << (DF_BITS(df) - 1)) - 1)
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#define M_MAX_INT(m) (int64_t)((1LL << ((m) - 1)) - 1)
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#define DF_MIN_INT(df) (int64_t)(-(1LL << (DF_BITS(df) - 1)))
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#define M_MIN_INT(m) (int64_t)(-(1LL << ((m) - 1)))
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#define DF_MAX_UINT(df) (uint64_t)(-1ULL >> (64 - DF_BITS(df)))
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#define M_MAX_UINT(m) (uint64_t)(-1ULL >> (64 - (m)))
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#define UNSIGNED(x, df) ((x) & DF_MAX_UINT(df))
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#define SIGNED(x, df) \
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((((int64_t)x) << (64 - DF_BITS(df))) >> (64 - DF_BITS(df)))
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/* Element-by-element access macros */
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#define DF_ELEMENTS(df) (MSA_WRLEN / DF_BITS(df))
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static inline void msa_move_v(wr_t *pwd, wr_t *pws)
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{
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uint32_t i;
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for (i = 0; i < DF_ELEMENTS(DF_DOUBLE); i++) {
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pwd->d[i] = pws->d[i];
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}
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}
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2014-11-01 08:28:43 +03:00
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#define MSA_FN_IMM8(FUNC, DEST, OPERATION) \
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void helper_msa_ ## FUNC(CPUMIPSState *env, uint32_t wd, uint32_t ws, \
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uint32_t i8) \
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{ \
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wr_t *pwd = &(env->active_fpu.fpr[wd].wr); \
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wr_t *pws = &(env->active_fpu.fpr[ws].wr); \
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uint32_t i; \
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for (i = 0; i < DF_ELEMENTS(DF_BYTE); i++) { \
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DEST = OPERATION; \
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} \
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}
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MSA_FN_IMM8(andi_b, pwd->b[i], pws->b[i] & i8)
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MSA_FN_IMM8(ori_b, pwd->b[i], pws->b[i] | i8)
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MSA_FN_IMM8(nori_b, pwd->b[i], ~(pws->b[i] | i8))
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MSA_FN_IMM8(xori_b, pwd->b[i], pws->b[i] ^ i8)
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#define BIT_MOVE_IF_NOT_ZERO(dest, arg1, arg2, df) \
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UNSIGNED(((dest & (~arg2)) | (arg1 & arg2)), df)
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MSA_FN_IMM8(bmnzi_b, pwd->b[i],
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BIT_MOVE_IF_NOT_ZERO(pwd->b[i], pws->b[i], i8, DF_BYTE))
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#define BIT_MOVE_IF_ZERO(dest, arg1, arg2, df) \
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UNSIGNED((dest & arg2) | (arg1 & (~arg2)), df)
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MSA_FN_IMM8(bmzi_b, pwd->b[i],
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BIT_MOVE_IF_ZERO(pwd->b[i], pws->b[i], i8, DF_BYTE))
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#define BIT_SELECT(dest, arg1, arg2, df) \
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UNSIGNED((arg1 & (~dest)) | (arg2 & dest), df)
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MSA_FN_IMM8(bseli_b, pwd->b[i],
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BIT_SELECT(pwd->b[i], pws->b[i], i8, DF_BYTE))
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#undef MSA_FN_IMM8
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#define SHF_POS(i, imm) (((i) & 0xfc) + (((imm) >> (2 * ((i) & 0x03))) & 0x03))
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void helper_msa_shf_df(CPUMIPSState *env, uint32_t df, uint32_t wd,
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uint32_t ws, uint32_t imm)
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{
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wr_t *pwd = &(env->active_fpu.fpr[wd].wr);
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wr_t *pws = &(env->active_fpu.fpr[ws].wr);
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wr_t wx, *pwx = &wx;
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uint32_t i;
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switch (df) {
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case DF_BYTE:
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for (i = 0; i < DF_ELEMENTS(DF_BYTE); i++) {
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pwx->b[i] = pws->b[SHF_POS(i, imm)];
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}
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break;
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case DF_HALF:
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for (i = 0; i < DF_ELEMENTS(DF_HALF); i++) {
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pwx->h[i] = pws->h[SHF_POS(i, imm)];
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}
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break;
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case DF_WORD:
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for (i = 0; i < DF_ELEMENTS(DF_WORD); i++) {
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pwx->w[i] = pws->w[SHF_POS(i, imm)];
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}
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break;
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default:
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assert(0);
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}
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msa_move_v(pwd, pwx);
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}
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