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qemu / qemu / d831c5fd868225882c5297b34a241929c267be13 / . / target / mips / tcg / tx79_translate.c
blob: dd6fb8a7bd7230a3369845c7bdc0892080e294fc [file] [log] [blame]
/*
* Toshiba TX79-specific instructions translation routines
*
* Copyright (c) 2018 Fredrik Noring
* Copyright (c) 2021 Philippe Mathieu-Daudé
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "translate.h"
#include "tcg/tcg-op-gvec.h"
/* Include the auto-generated decoder. */
#include "decode-tx79.c.inc"
/*
* Overview of the TX79-specific instruction set
* =============================================
*
* The R5900 and the C790 have 128-bit wide GPRs, where the upper 64 bits
* are only used by the specific quadword (128-bit) LQ/SQ load/store
* instructions and certain multimedia instructions (MMIs). These MMIs
* configure the 128-bit data path as two 64-bit, four 32-bit, eight 16-bit
* or sixteen 8-bit paths.
*
* Reference:
*
* The Toshiba TX System RISC TX79 Core Architecture manual,
* https://wiki.qemu.org/File:C790.pdf
*/
bool decode_ext_tx79(DisasContext *ctx, uint32_t insn)
{
if (TARGET_LONG_BITS == 64 && decode_tx79(ctx, insn)) {
return true;
}
return false;
}
/*
* Three-Operand Multiply and Multiply-Add (4 instructions)
* --------------------------------------------------------
* MADD [rd,] rs, rt Multiply/Add
* MADDU [rd,] rs, rt Multiply/Add Unsigned
* MULT [rd,] rs, rt Multiply (3-operand)
* MULTU [rd,] rs, rt Multiply Unsigned (3-operand)
*/
/*
* Multiply Instructions for Pipeline 1 (10 instructions)
* ------------------------------------------------------
* MULT1 [rd,] rs, rt Multiply Pipeline 1
* MULTU1 [rd,] rs, rt Multiply Unsigned Pipeline 1
* DIV1 rs, rt Divide Pipeline 1
* DIVU1 rs, rt Divide Unsigned Pipeline 1
* MADD1 [rd,] rs, rt Multiply-Add Pipeline 1
* MADDU1 [rd,] rs, rt Multiply-Add Unsigned Pipeline 1
* MFHI1 rd Move From HI1 Register
* MFLO1 rd Move From LO1 Register
* MTHI1 rs Move To HI1 Register
* MTLO1 rs Move To LO1 Register
*/
static bool trans_MFHI1(DisasContext *ctx, arg_r *a)
{
gen_store_gpr(cpu_HI[1], a->rd);
return true;
}
static bool trans_MFLO1(DisasContext *ctx, arg_r *a)
{
gen_store_gpr(cpu_LO[1], a->rd);
return true;
}
static bool trans_MTHI1(DisasContext *ctx, arg_r *a)
{
gen_load_gpr(cpu_HI[1], a->rs);
return true;
}
static bool trans_MTLO1(DisasContext *ctx, arg_r *a)
{
gen_load_gpr(cpu_LO[1], a->rs);
return true;
}
/*
* Arithmetic (19 instructions)
* ----------------------------
* PADDB rd, rs, rt Parallel Add Byte
* PSUBB rd, rs, rt Parallel Subtract Byte
* PADDH rd, rs, rt Parallel Add Halfword
* PSUBH rd, rs, rt Parallel Subtract Halfword
* PADDW rd, rs, rt Parallel Add Word
* PSUBW rd, rs, rt Parallel Subtract Word
* PADSBH rd, rs, rt Parallel Add/Subtract Halfword
* PADDSB rd, rs, rt Parallel Add with Signed Saturation Byte
* PSUBSB rd, rs, rt Parallel Subtract with Signed Saturation Byte
* PADDSH rd, rs, rt Parallel Add with Signed Saturation Halfword
* PSUBSH rd, rs, rt Parallel Subtract with Signed Saturation Halfword
* PADDSW rd, rs, rt Parallel Add with Signed Saturation Word
* PSUBSW rd, rs, rt Parallel Subtract with Signed Saturation Word
* PADDUB rd, rs, rt Parallel Add with Unsigned saturation Byte
* PSUBUB rd, rs, rt Parallel Subtract with Unsigned saturation Byte
* PADDUH rd, rs, rt Parallel Add with Unsigned saturation Halfword
* PSUBUH rd, rs, rt Parallel Subtract with Unsigned saturation Halfword
* PADDUW rd, rs, rt Parallel Add with Unsigned saturation Word
* PSUBUW rd, rs, rt Parallel Subtract with Unsigned saturation Word
*/
static bool trans_parallel_arith(DisasContext *ctx, arg_r *a,
void (*gen_logic_i64)(TCGv_i64, TCGv_i64, TCGv_i64))
{
TCGv_i64 ax, bx;
if (a->rd == 0) {
/* nop */
return true;
}
ax = tcg_temp_new_i64();
bx = tcg_temp_new_i64();
/* Lower half */
gen_load_gpr(ax, a->rs);
gen_load_gpr(bx, a->rt);
gen_logic_i64(cpu_gpr[a->rd], ax, bx);
/* Upper half */
gen_load_gpr_hi(ax, a->rs);
gen_load_gpr_hi(bx, a->rt);
gen_logic_i64(cpu_gpr_hi[a->rd], ax, bx);
return true;
}
/* Parallel Subtract Byte */
static bool trans_PSUBB(DisasContext *ctx, arg_r *a)
{
return trans_parallel_arith(ctx, a, tcg_gen_vec_sub8_i64);
}
/* Parallel Subtract Halfword */
static bool trans_PSUBH(DisasContext *ctx, arg_r *a)
{
return trans_parallel_arith(ctx, a, tcg_gen_vec_sub16_i64);
}
/* Parallel Subtract Word */
static bool trans_PSUBW(DisasContext *ctx, arg_r *a)
{
return trans_parallel_arith(ctx, a, tcg_gen_vec_sub32_i64);
}
/*
* Min/Max (4 instructions)
* ------------------------
* PMAXH rd, rs, rt Parallel Maximum Halfword
* PMINH rd, rs, rt Parallel Minimum Halfword
* PMAXW rd, rs, rt Parallel Maximum Word
* PMINW rd, rs, rt Parallel Minimum Word
*/
/*
* Absolute (2 instructions)
* -------------------------
* PABSH rd, rt Parallel Absolute Halfword
* PABSW rd, rt Parallel Absolute Word
*/
/*
* Logical (4 instructions)
* ------------------------
* PAND rd, rs, rt Parallel AND
* POR rd, rs, rt Parallel OR
* PXOR rd, rs, rt Parallel XOR
* PNOR rd, rs, rt Parallel NOR
*/
/* Parallel And */
static bool trans_PAND(DisasContext *ctx, arg_r *a)
{
return trans_parallel_arith(ctx, a, tcg_gen_and_i64);
}
/* Parallel Or */
static bool trans_POR(DisasContext *ctx, arg_r *a)
{
return trans_parallel_arith(ctx, a, tcg_gen_or_i64);
}
/* Parallel Exclusive Or */
static bool trans_PXOR(DisasContext *ctx, arg_r *a)
{
return trans_parallel_arith(ctx, a, tcg_gen_xor_i64);
}
/* Parallel Not Or */
static bool trans_PNOR(DisasContext *ctx, arg_r *a)
{
return trans_parallel_arith(ctx, a, tcg_gen_nor_i64);
}
/*
* Shift (9 instructions)
* ----------------------
* PSLLH rd, rt, sa Parallel Shift Left Logical Halfword
* PSRLH rd, rt, sa Parallel Shift Right Logical Halfword
* PSRAH rd, rt, sa Parallel Shift Right Arithmetic Halfword
* PSLLW rd, rt, sa Parallel Shift Left Logical Word
* PSRLW rd, rt, sa Parallel Shift Right Logical Word
* PSRAW rd, rt, sa Parallel Shift Right Arithmetic Word
* PSLLVW rd, rt, rs Parallel Shift Left Logical Variable Word
* PSRLVW rd, rt, rs Parallel Shift Right Logical Variable Word
* PSRAVW rd, rt, rs Parallel Shift Right Arithmetic Variable Word
*/
/*
* Compare (6 instructions)
* ------------------------
* PCGTB rd, rs, rt Parallel Compare for Greater Than Byte
* PCEQB rd, rs, rt Parallel Compare for Equal Byte
* PCGTH rd, rs, rt Parallel Compare for Greater Than Halfword
* PCEQH rd, rs, rt Parallel Compare for Equal Halfword
* PCGTW rd, rs, rt Parallel Compare for Greater Than Word
* PCEQW rd, rs, rt Parallel Compare for Equal Word
*/
static bool trans_parallel_compare(DisasContext *ctx, arg_r *a,
TCGCond cond, unsigned wlen)
{
TCGv_i64 c0, c1, ax, bx, t0, t1, t2;
if (a->rd == 0) {
/* nop */
return true;
}
c0 = tcg_constant_tl(0);
c1 = tcg_constant_tl(0xffffffff);
ax = tcg_temp_new_i64();
bx = tcg_temp_new_i64();
t0 = tcg_temp_new_i64();
t1 = tcg_temp_new_i64();
t2 = tcg_temp_new_i64();
/* Lower half */
gen_load_gpr(ax, a->rs);
gen_load_gpr(bx, a->rt);
for (int i = 0; i < (64 / wlen); i++) {
tcg_gen_sextract_i64(t0, ax, wlen * i, wlen);
tcg_gen_sextract_i64(t1, bx, wlen * i, wlen);
tcg_gen_movcond_i64(cond, t2, t1, t0, c1, c0);
tcg_gen_deposit_i64(cpu_gpr[a->rd], cpu_gpr[a->rd], t2, wlen * i, wlen);
}
/* Upper half */
gen_load_gpr_hi(ax, a->rs);
gen_load_gpr_hi(bx, a->rt);
for (int i = 0; i < (64 / wlen); i++) {
tcg_gen_sextract_i64(t0, ax, wlen * i, wlen);
tcg_gen_sextract_i64(t1, bx, wlen * i, wlen);
tcg_gen_movcond_i64(cond, t2, t1, t0, c1, c0);
tcg_gen_deposit_i64(cpu_gpr_hi[a->rd], cpu_gpr_hi[a->rd], t2, wlen * i, wlen);
}
return true;
}
/* Parallel Compare for Greater Than Byte */
static bool trans_PCGTB(DisasContext *ctx, arg_r *a)
{
return trans_parallel_compare(ctx, a, TCG_COND_GE, 8);
}
/* Parallel Compare for Equal Byte */
static bool trans_PCEQB(DisasContext *ctx, arg_r *a)
{
return trans_parallel_compare(ctx, a, TCG_COND_EQ, 8);
}
/* Parallel Compare for Greater Than Halfword */
static bool trans_PCGTH(DisasContext *ctx, arg_r *a)
{
return trans_parallel_compare(ctx, a, TCG_COND_GE, 16);
}
/* Parallel Compare for Equal Halfword */
static bool trans_PCEQH(DisasContext *ctx, arg_r *a)
{
return trans_parallel_compare(ctx, a, TCG_COND_EQ, 16);
}
/* Parallel Compare for Greater Than Word */
static bool trans_PCGTW(DisasContext *ctx, arg_r *a)
{
return trans_parallel_compare(ctx, a, TCG_COND_GE, 32);
}
/* Parallel Compare for Equal Word */
static bool trans_PCEQW(DisasContext *ctx, arg_r *a)
{
return trans_parallel_compare(ctx, a, TCG_COND_EQ, 32);
}
/*
* LZC (1 instruction)
* -------------------
* PLZCW rd, rs Parallel Leading Zero or One Count Word
*/
/*
* Quadword Load and Store (2 instructions)
* ----------------------------------------
* LQ rt, offset(base) Load Quadword
* SQ rt, offset(base) Store Quadword
*/
static bool trans_LQ(DisasContext *ctx, arg_i *a)
{
TCGv_i64 t0;
TCGv addr;
if (a->rt == 0) {
/* nop */
return true;
}
t0 = tcg_temp_new_i64();
addr = tcg_temp_new();
gen_base_offset_addr(ctx, addr, a->base, a->offset);
/*
* Clear least-significant four bits of the effective
* address, effectively creating an aligned address.
*/
tcg_gen_andi_tl(addr, addr, ~0xf);
/* Lower half */
tcg_gen_qemu_ld_i64(t0, addr, ctx->mem_idx, MO_TEUQ);
gen_store_gpr(t0, a->rt);
/* Upper half */
tcg_gen_addi_i64(addr, addr, 8);
tcg_gen_qemu_ld_i64(t0, addr, ctx->mem_idx, MO_TEUQ);
gen_store_gpr_hi(t0, a->rt);
return true;
}
static bool trans_SQ(DisasContext *ctx, arg_i *a)
{
TCGv_i64 t0 = tcg_temp_new_i64();
TCGv addr = tcg_temp_new();
gen_base_offset_addr(ctx, addr, a->base, a->offset);
/*
* Clear least-significant four bits of the effective
* address, effectively creating an aligned address.
*/
tcg_gen_andi_tl(addr, addr, ~0xf);
/* Lower half */
gen_load_gpr(t0, a->rt);
tcg_gen_qemu_st_i64(t0, addr, ctx->mem_idx, MO_TEUQ);
/* Upper half */
tcg_gen_addi_i64(addr, addr, 8);
gen_load_gpr_hi(t0, a->rt);
tcg_gen_qemu_st_i64(t0, addr, ctx->mem_idx, MO_TEUQ);
return true;
}
/*
* Multiply and Divide (19 instructions)
* -------------------------------------
* PMULTW rd, rs, rt Parallel Multiply Word
* PMULTUW rd, rs, rt Parallel Multiply Unsigned Word
* PDIVW rs, rt Parallel Divide Word
* PDIVUW rs, rt Parallel Divide Unsigned Word
* PMADDW rd, rs, rt Parallel Multiply-Add Word
* PMADDUW rd, rs, rt Parallel Multiply-Add Unsigned Word
* PMSUBW rd, rs, rt Parallel Multiply-Subtract Word
* PMULTH rd, rs, rt Parallel Multiply Halfword
* PMADDH rd, rs, rt Parallel Multiply-Add Halfword
* PMSUBH rd, rs, rt Parallel Multiply-Subtract Halfword
* PHMADH rd, rs, rt Parallel Horizontal Multiply-Add Halfword
* PHMSBH rd, rs, rt Parallel Horizontal Multiply-Subtract Halfword
* PDIVBW rs, rt Parallel Divide Broadcast Word
* PMFHI rd Parallel Move From HI Register
* PMFLO rd Parallel Move From LO Register
* PMTHI rs Parallel Move To HI Register
* PMTLO rs Parallel Move To LO Register
* PMFHL rd Parallel Move From HI/LO Register
* PMTHL rs Parallel Move To HI/LO Register
*/
/*
* Pack/Extend (11 instructions)
* -----------------------------
* PPAC5 rd, rt Parallel Pack to 5 bits
* PPACB rd, rs, rt Parallel Pack to Byte
* PPACH rd, rs, rt Parallel Pack to Halfword
* PPACW rd, rs, rt Parallel Pack to Word
* PEXT5 rd, rt Parallel Extend Upper from 5 bits
* PEXTUB rd, rs, rt Parallel Extend Upper from Byte
* PEXTLB rd, rs, rt Parallel Extend Lower from Byte
* PEXTUH rd, rs, rt Parallel Extend Upper from Halfword
* PEXTLH rd, rs, rt Parallel Extend Lower from Halfword
* PEXTUW rd, rs, rt Parallel Extend Upper from Word
* PEXTLW rd, rs, rt Parallel Extend Lower from Word
*/
/* Parallel Pack to Word */
static bool trans_PPACW(DisasContext *ctx, arg_r *a)
{
TCGv_i64 a0, b0, t0;
if (a->rd == 0) {
/* nop */
return true;
}
a0 = tcg_temp_new_i64();
b0 = tcg_temp_new_i64();
t0 = tcg_temp_new_i64();
gen_load_gpr(a0, a->rs);
gen_load_gpr(b0, a->rt);
gen_load_gpr_hi(t0, a->rt); /* b1 */
tcg_gen_deposit_i64(cpu_gpr[a->rd], b0, t0, 32, 32);
gen_load_gpr_hi(t0, a->rs); /* a1 */
tcg_gen_deposit_i64(cpu_gpr_hi[a->rd], a0, t0, 32, 32);
return true;
}
static void gen_pextw(TCGv_i64 dl, TCGv_i64 dh, TCGv_i64 a, TCGv_i64 b)
{
tcg_gen_deposit_i64(dl, b, a, 32, 32);
tcg_gen_shri_i64(b, b, 32);
tcg_gen_deposit_i64(dh, a, b, 0, 32);
}
static bool trans_PEXTLx(DisasContext *ctx, arg_r *a, unsigned wlen)
{
TCGv_i64 ax, bx;
if (a->rd == 0) {
/* nop */
return true;
}
ax = tcg_temp_new_i64();
bx = tcg_temp_new_i64();
gen_load_gpr(ax, a->rs);
gen_load_gpr(bx, a->rt);
/* Lower half */
for (int i = 0; i < 64 / (2 * wlen); i++) {
tcg_gen_deposit_i64(cpu_gpr[a->rd],
cpu_gpr[a->rd], bx, 2 * wlen * i, wlen);
tcg_gen_deposit_i64(cpu_gpr[a->rd],
cpu_gpr[a->rd], ax, 2 * wlen * i + wlen, wlen);
tcg_gen_shri_i64(bx, bx, wlen);
tcg_gen_shri_i64(ax, ax, wlen);
}
/* Upper half */
for (int i = 0; i < 64 / (2 * wlen); i++) {
tcg_gen_deposit_i64(cpu_gpr_hi[a->rd],
cpu_gpr_hi[a->rd], bx, 2 * wlen * i, wlen);
tcg_gen_deposit_i64(cpu_gpr_hi[a->rd],
cpu_gpr_hi[a->rd], ax, 2 * wlen * i + wlen, wlen);
tcg_gen_shri_i64(bx, bx, wlen);
tcg_gen_shri_i64(ax, ax, wlen);
}
return true;
}
/* Parallel Extend Lower from Byte */
static bool trans_PEXTLB(DisasContext *ctx, arg_r *a)
{
return trans_PEXTLx(ctx, a, 8);
}
/* Parallel Extend Lower from Halfword */
static bool trans_PEXTLH(DisasContext *ctx, arg_r *a)
{
return trans_PEXTLx(ctx, a, 16);
}
/* Parallel Extend Lower from Word */
static bool trans_PEXTLW(DisasContext *ctx, arg_r *a)
{
TCGv_i64 ax, bx;
if (a->rd == 0) {
/* nop */
return true;
}
ax = tcg_temp_new_i64();
bx = tcg_temp_new_i64();
gen_load_gpr(ax, a->rs);
gen_load_gpr(bx, a->rt);
gen_pextw(cpu_gpr[a->rd], cpu_gpr_hi[a->rd], ax, bx);
return true;
}
/* Parallel Extend Upper from Word */
static bool trans_PEXTUW(DisasContext *ctx, arg_r *a)
{
TCGv_i64 ax, bx;
if (a->rd == 0) {
/* nop */
return true;
}
ax = tcg_temp_new_i64();
bx = tcg_temp_new_i64();
gen_load_gpr_hi(ax, a->rs);
gen_load_gpr_hi(bx, a->rt);
gen_pextw(cpu_gpr[a->rd], cpu_gpr_hi[a->rd], ax, bx);
return true;
}
/*
* Others (16 instructions)
* ------------------------
* PCPYH rd, rt Parallel Copy Halfword
* PCPYLD rd, rs, rt Parallel Copy Lower Doubleword
* PCPYUD rd, rs, rt Parallel Copy Upper Doubleword
* PREVH rd, rt Parallel Reverse Halfword
* PINTH rd, rs, rt Parallel Interleave Halfword
* PINTEH rd, rs, rt Parallel Interleave Even Halfword
* PEXEH rd, rt Parallel Exchange Even Halfword
* PEXCH rd, rt Parallel Exchange Center Halfword
* PEXEW rd, rt Parallel Exchange Even Word
* PEXCW rd, rt Parallel Exchange Center Word
* QFSRV rd, rs, rt Quadword Funnel Shift Right Variable
* MFSA rd Move from Shift Amount Register
* MTSA rs Move to Shift Amount Register
* MTSAB rs, immediate Move Byte Count to Shift Amount Register
* MTSAH rs, immediate Move Halfword Count to Shift Amount Register
* PROT3W rd, rt Parallel Rotate 3 Words
*/
/* Parallel Copy Halfword */
static bool trans_PCPYH(DisasContext *s, arg_r *a)
{
if (a->rd == 0) {
/* nop */
return true;
}
if (a->rt == 0) {
tcg_gen_movi_i64(cpu_gpr[a->rd], 0);
tcg_gen_movi_i64(cpu_gpr_hi[a->rd], 0);
return true;
}
tcg_gen_deposit_i64(cpu_gpr[a->rd], cpu_gpr[a->rt], cpu_gpr[a->rt], 16, 16);
tcg_gen_deposit_i64(cpu_gpr[a->rd], cpu_gpr[a->rd], cpu_gpr[a->rd], 32, 32);
tcg_gen_deposit_i64(cpu_gpr_hi[a->rd], cpu_gpr_hi[a->rt], cpu_gpr_hi[a->rt], 16, 16);
tcg_gen_deposit_i64(cpu_gpr_hi[a->rd], cpu_gpr_hi[a->rd], cpu_gpr_hi[a->rd], 32, 32);
return true;
}
/* Parallel Copy Lower Doubleword */
static bool trans_PCPYLD(DisasContext *s, arg_r *a)
{
if (a->rd == 0) {
/* nop */
return true;
}
if (a->rs == 0) {
tcg_gen_movi_i64(cpu_gpr_hi[a->rd], 0);
} else {
tcg_gen_mov_i64(cpu_gpr_hi[a->rd], cpu_gpr[a->rs]);
}
if (a->rt == 0) {
tcg_gen_movi_i64(cpu_gpr[a->rd], 0);
} else if (a->rd != a->rt) {
tcg_gen_mov_i64(cpu_gpr[a->rd], cpu_gpr[a->rt]);
}
return true;
}
/* Parallel Copy Upper Doubleword */
static bool trans_PCPYUD(DisasContext *s, arg_r *a)
{
if (a->rd == 0) {
/* nop */
return true;
}
gen_load_gpr_hi(cpu_gpr[a->rd], a->rs);
if (a->rt == 0) {
tcg_gen_movi_i64(cpu_gpr_hi[a->rd], 0);
} else if (a->rd != a->rt) {
tcg_gen_mov_i64(cpu_gpr_hi[a->rd], cpu_gpr_hi[a->rt]);
}
return true;
}
/* Parallel Rotate 3 Words Left */
static bool trans_PROT3W(DisasContext *ctx, arg_r *a)
{
TCGv_i64 ax;
if (a->rd == 0) {
/* nop */
return true;
}
if (a->rt == 0) {
tcg_gen_movi_i64(cpu_gpr[a->rd], 0);
tcg_gen_movi_i64(cpu_gpr_hi[a->rd], 0);
return true;
}
ax = tcg_temp_new_i64();
tcg_gen_mov_i64(ax, cpu_gpr_hi[a->rt]);
tcg_gen_deposit_i64(cpu_gpr_hi[a->rd], ax, cpu_gpr[a->rt], 0, 32);
tcg_gen_deposit_i64(cpu_gpr[a->rd], cpu_gpr[a->rt], ax, 0, 32);
tcg_gen_rotri_i64(cpu_gpr[a->rd], cpu_gpr[a->rd], 32);
return true;
}