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-rw-r--r--sim/erc32/exec.c1597
1 files changed, 0 insertions, 1597 deletions
diff --git a/sim/erc32/exec.c b/sim/erc32/exec.c
deleted file mode 100644
index 8690cea..0000000
--- a/sim/erc32/exec.c
+++ /dev/null
@@ -1,1597 +0,0 @@
-/*
- * This file is part of SIS.
- *
- * SIS, SPARC instruction simulator V1.8 Copyright (C) 1995 Jiri Gaisler,
- * European Space Agency
- *
- * This program is free software; you can redistribute it and/or modify it under
- * the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * This program 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 General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 675
- * Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include "sis.h"
-#include "end.h"
-#include <math.h>
-#include <stdio.h>
-
-extern int32 ext_irl, irqpend, iurev0, sis_verbose;
-
-/* Load/store interlock delay */
-#define FLSTHOLD 1
-
-/* Load delay (delete if unwanted - speeds up simulation) */
-#define LOAD_DEL 1
-
-#define T_LD 2
-#define T_LDD 3
-#define T_ST 3
-#define T_STD 4
-#define T_LDST 4
-#define T_JMPL 2
-#define T_RETT 2
-
-#define FSR_QNE 0x2000
-#define FP_EXE_MODE 0
-#define FP_EXC_PE 1
-#define FP_EXC_MODE 2
-
-#define FBA 8
-#define FBN 0
-#define FBNE 1
-#define FBLG 2
-#define FBUL 3
-#define FBL 4
-#define FBUG 5
-#define FBG 6
-#define FBU 7
-
-#define FCC_E 0
-#define FCC_L 1
-#define FCC_G 2
-#define FCC_U 3
-
-#define PSR_ET 0x20
-#define PSR_EF 0x1000
-#define PSR_PS 0x40
-#define PSR_S 0x80
-#define PSR_N 0x0800000
-#define PSR_Z 0x0400000
-#define PSR_V 0x0200000
-#define PSR_C 0x0100000
-#define PSR_CC 0x0F00000
-#define PSR_CWP 0x7
-#define PSR_PIL 0x0f00
-
-#define ICC_N sregs->psr
-#define ICC_Z (sregs->psr << 1)
-#define ICC_V (sregs->psr << 2)
-#define ICC_C (sregs->psr << 3)
-
-#define TRAP_IEXC 1
-#define TRAP_UNIMP 2
-#define TRAP_PRIVI 3
-#define TRAP_FPDIS 4
-#define TRAP_WOFL 5
-#define TRAP_WUFL 6
-#define TRAP_UNALI 7
-#define TRAP_FPEXC 8
-#define TRAP_DEXC 9
-#define TRAP_TAG 10
-
-#define FSR_TT 0x1C000
-#define FP_IEEE 0x04000
-#define FP_UNIMP 0x0C000
-#define FP_SEQ_ERR 0x10000
-
-#define BICC_BN 0
-#define BICC_BE 1
-#define BICC_BLE 2
-#define BICC_BL 3
-#define BICC_BLEU 4
-#define BICC_BCS 5
-#define BICC_NEG 6
-#define BICC_BVS 7
-#define BICC_BA 8
-
-#define INST_SIMM13 0x1fff
-#define INST_RS2 0x1f
-#define INST_I 0x2000
-#define ADD 0x00
-#define ADDCC 0x10
-#define ADDX 0x08
-#define ADDXCC 0x18
-#define TADDCC 0x20
-#define TADDCCTV 0x22
-#define IAND 0x01
-#define IANDCC 0x11
-#define IANDN 0x05
-#define IANDNCC 0x15
-#define MULScc 0x24
-#define IOR 0x02
-#define IORCC 0x12
-#define IORN 0x06
-#define IORNCC 0x16
-#define SLL 0x25
-#define SRA 0x27
-#define SRL 0x26
-#define SUB 0x04
-#define SUBCC 0x14
-#define SUBX 0x0C
-#define SUBXCC 0x1C
-#define IXNOR 0x07
-#define IXNORCC 0x17
-#define IXOR 0x03
-#define IXORCC 0x13
-#define SETHI 0x04
-#define BICC 0x02
-#define FPBCC 0x06
-#define RDY 0x28
-#define RDPSR 0x29
-#define RDWIM 0x2A
-#define RDTBR 0x2B
-#define WRY 0x30
-#define WRPSR 0x31
-#define WRWIM 0x32
-#define WRTBR 0x33
-#define JMPL 0x38
-#define RETT 0x39
-#define TICC 0x3A
-#define SAVE 0x3C
-#define RESTORE 0x3D
-#define LDD 0x03
-#define LDDA 0x13
-#define LD 0x00
-#define LDA 0x10
-#define LDF 0x20
-#define LDDF 0x23
-#define LDSTUB 0x0D
-#define LDSTUBA 0x1D
-#define LDUB 0x01
-#define LDUBA 0x11
-#define LDSB 0x09
-#define LDSBA 0x19
-#define LDUH 0x02
-#define LDUHA 0x12
-#define LDSH 0x0A
-#define LDSHA 0x1A
-#define LDFSR 0x21
-#define ST 0x04
-#define STA 0x14
-#define STB 0x05
-#define STBA 0x15
-#define STD 0x07
-#define STDA 0x17
-#define STF 0x24
-#define STDFQ 0x26
-#define STDF 0x27
-#define STFSR 0x25
-#define STH 0x06
-#define STHA 0x16
-#define SWAP 0x0F
-#define SWAPA 0x1F
-
-/* # of cycles overhead when a trap is taken */
-#define TRAP_C 3
-
-int32 fpexec();
-extern struct estate ebase;
-extern int32 nfp;
-
-sub_cc(operand1, operand2, result, sregs)
- int32 operand1;
- int32 operand2;
- int32 result;
- struct pstate *sregs;
-{
- sregs->psr = ((sregs->psr & ~PSR_N) | ((result >> 8) & PSR_N));
- if (result)
- sregs->psr &= ~PSR_Z;
- else
- sregs->psr |= PSR_Z;
- sregs->psr = (sregs->psr & ~PSR_V) | ((
- ((operand1 & ~operand2 & ~result) |
- (~operand1 & operand2 & result)) >> 10) & PSR_V);
- sregs->psr = (sregs->psr & ~PSR_C) | ((
- ((~operand1 & operand2) |
- ((~operand1 | operand2) & result)) >> 11) & PSR_C);
-}
-
-add_cc(operand1, operand2, result, psr)
- int32 operand1;
- int32 operand2;
- int32 result;
- uint32 *psr;
-{
- *psr = ((*psr & ~PSR_N) | ((result >> 8) & PSR_N));
- if (result)
- *psr &= ~PSR_Z;
- else
- *psr |= PSR_Z;
- *psr = (*psr & ~PSR_V) | ((
- ((operand1 & operand2 & ~result) |
- (~operand1 & ~operand2 & result)) >> 10) & PSR_V);
- *psr = (*psr & ~PSR_C) | ((
- ((operand1 & operand2) |
- ((operand1 | operand2) & ~result)) >> 11) & PSR_C);
-}
-
-log_cc(result, sregs)
- int32 result;
- struct pstate *sregs;
-{
- sregs->psr &= ~(PSR_CC); /* Zero CC bits */
- sregs->psr = (sregs->psr | ((result >> 8) & PSR_N));
- if (result == 0)
- sregs->psr |= PSR_Z;
-}
-
-int
-dispatch_instruction(sregs)
- struct pstate *sregs;
-{
-
- uint32 cwp, op, op2, op3, opf, opc, asi, a, rd, cond, rs1,
- rs2;
- uint32 ldep;
- int32 operand1, operand2, *rdd, result, i, disp22, eicc,
- new_cwp;
- int32 pc, npc, data, address, ws, mexc, fcc;
-
- sregs->ninst++;
- sregs->icnt = 1;
- cwp = ((sregs->psr & PSR_CWP) << 4);
- op = sregs->inst >> 30;
- pc = sregs->npc;
- npc = sregs->npc + 4;
- if (op > 1) {
-
- op3 = (sregs->inst >> 19) & 0x3f;
- rs1 = (sregs->inst >> 14) & 0x1f;
- rd = (sregs->inst >> 25) & 0x1f;
-
-#ifdef LOAD_DEL
-
- /* Check if load dependecy is possible */
- ldep = ((ebase.simtime <= sregs->ildtime) && ((op3 & 0x38) != 0x28) &&
- ((op3 & 0x3e) != 0x34) && (sregs->ildreg != 0));
- if (sregs->inst & INST_I) {
- if (ldep && (sregs->ildreg == rs1))
- sregs->hold++;
- operand2 = sregs->inst & INST_SIMM13;
- if (operand2 > 0x0fff)
- operand2 |= 0xfffff000;
- } else {
- rs2 = sregs->inst & INST_RS2;
- if (rs2 > 7)
- operand2 = sregs->r[(cwp + rs2) & 0x7f];
- else
- operand2 = sregs->g[rs2];
- if (ldep && ((sregs->ildreg == rs1) || (sregs->ildreg == rs2)))
- sregs->hold++;
- }
-#else
- if (sregs->inst & INST_I) {
- operand2 = sregs->inst & INST_SIMM13;
- if (operand2 > 0x0fff)
- operand2 |= 0xfffff000;
- } else {
- rs2 = sregs->inst & INST_RS2;
- if (rs2 > 7)
- operand2 = sregs->r[(cwp + rs2) & 0x7f];
- else
- operand2 = sregs->g[rs2];
- }
-#endif
-
- if (rd > 7)
- rdd = &(sregs->r[(cwp + rd) & 0x7f]);
- else
- rdd = &(sregs->g[rd]);
- if (rs1 > 7)
- rs1 = sregs->r[(cwp + rs1) & 0x7f];
- else
- rs1 = sregs->g[rs1];
- }
- switch (op) {
- case 0:
- op2 = (sregs->inst >> 22) & 0x7;
- switch (op2) {
- case SETHI:
- rd = (sregs->inst >> 25) & 0x1f;
- if (rd > 7)
- rdd = &(sregs->r[(cwp + rd) & 0x7f]);
- else
- rdd = &(sregs->g[rd]);
- *rdd = sregs->inst << 10;
- break;
- case BICC:
-#ifdef STAT
- sregs->nbranch++;
-#endif
- cond = ((sregs->inst >> 25) & 0x0f);
- switch (cond & 0x7) {
- case BICC_BN:
- eicc = 0;
- break;
- case BICC_BE:
- eicc = ICC_Z;
- break;
- case BICC_BLE:
- eicc = ICC_Z | (ICC_N ^ ICC_V);
- break;
- case BICC_BL:
- eicc = (ICC_N ^ ICC_V);
- break;
- case BICC_BLEU:
- eicc = ICC_C | ICC_Z;
- break;
- case BICC_BCS:
- eicc = ICC_C;
- break;
- case BICC_NEG:
- eicc = ICC_N;
- break;
- case BICC_BVS:
- eicc = ICC_V;
- break;
- }
- eicc &= PSR_N;
- if (sregs->inst & 0x10000000)
- eicc = !eicc;
- a = sregs->inst & 0x20000000;
- if (eicc) {
- operand1 = sregs->inst & 0x3fffff;
- if (sregs->inst & 0x200000)
- operand1 |= 0xffc00000;
- npc = sregs->pc + (operand1 << 2);
- if ((cond == BICC_BA) && (a))
- sregs->annul = 1;
- } else {
- if (a)
- sregs->annul = 1;
- }
- break;
- case FPBCC:
-#ifdef STAT
- sregs->nbranch++;
-#endif
- if (!((sregs->psr & PSR_EF) && chk_fp(sregs))) {
- sregs->trap = TRAP_FPDIS;
- break;
- }
- if (ebase.simtime < sregs->ftime) {
- sregs->ftime = ebase.simtime + sregs->hold;
- }
- cond = ((sregs->inst >> 25) & 0x0f);
- fcc = (sregs->fsr >> 10) & 0x3;
- switch (cond & 0x7) {
- case FBN:
- eicc = 0;
- break;
- case FBNE:
- eicc = (fcc != FCC_E);
- break;
- case FBLG:
- eicc = (fcc == FCC_L) || (fcc == FCC_G);
- break;
- case FBUL:
- eicc = (fcc == FCC_L) || (fcc == FCC_U);
- break;
- case FBL:
- eicc = (fcc == FCC_L);
- break;
- case FBUG:
- eicc = (fcc == FCC_G) || (fcc == FCC_U);
- break;
- case FBG:
- eicc = (fcc == FCC_G);
- break;
- case FBU:
- eicc = (fcc == FCC_U);
- break;
- }
- if (sregs->inst & 0x10000000)
- eicc = !eicc;
- a = sregs->inst & 0x20000000;
- if (eicc) {
- operand1 = sregs->inst & 0x3fffff;
- if (sregs->inst & 0x200000)
- operand1 |= 0xffc00000;
- npc = sregs->pc + (operand1 << 2);
- if ((cond == FBA) && (a))
- sregs->annul = 1;
- } else {
- if (a)
- sregs->annul = 1;
- }
- break;
-
- default:
- sregs->trap = TRAP_UNIMP;
- break;
- }
- break;
- case 1: /* CALL */
-#ifdef STAT
- sregs->nbranch++;
-#endif
- sregs->r[(cwp + 15) & 0x7f] = sregs->pc;
- npc = sregs->pc + (sregs->inst << 2);
- break;
-
- case 2:
- if ((op3 >> 1) == 0x1a) {
- if (!((sregs->psr & PSR_EF) && chk_fp(sregs))) {
- sregs->trap = TRAP_FPDIS;
- } else {
- rs1 = (sregs->inst >> 14) & 0x1f;
- rs2 = sregs->inst & 0x1f;
- sregs->trap = fpexec(op3, rd, rs1, rs2, sregs);
- }
- } else {
-
- switch (op3) {
- case TICC:
- cond = ((sregs->inst >> 25) & 0x0f);
- switch (cond & 0x7) {
- case BICC_BN:
- eicc = 0;
- break;
- case BICC_BE:
- eicc = ICC_Z;
- break;
- case BICC_BLE:
- eicc = ICC_Z | (ICC_N ^ ICC_V);
- break;
- case BICC_BL:
- eicc = (ICC_N ^ ICC_V);
- break;
- case BICC_BLEU:
- eicc = ICC_C | ICC_Z;
- break;
- case BICC_BCS:
- eicc = ICC_C;
- break;
- case BICC_NEG:
- eicc = ICC_N;
- break;
- case BICC_BVS:
- eicc = ICC_V;
- break;
- }
- eicc &= PSR_N;
- if (sregs->inst & 0x10000000)
- eicc = !eicc;
- if (eicc) {
- sregs->trap = (0x80 | ((rs1 + operand2) & 0x7f));
- }
- break;
-
- case MULScc:
- operand1 =
- (((sregs->psr & PSR_V) ^ ((sregs->psr & PSR_N) >> 2))
- << 10) | (rs1 >> 1);
- if ((sregs->y & 1) == 0)
- operand2 = 0;
- *rdd = operand1 + operand2;
- sregs->y = (rs1 << 31) | (sregs->y >> 1);
- add_cc(operand1, operand2, *rdd, &sregs->psr);
- break;
- case IXNOR:
- *rdd = rs1 ^ ~operand2;
- break;
- case IXNORCC:
- *rdd = rs1 ^ ~operand2;
- log_cc(*rdd, sregs);
- break;
- case IXOR:
- *rdd = rs1 ^ operand2;
- break;
- case IXORCC:
- *rdd = rs1 ^ operand2;
- log_cc(*rdd, sregs);
- break;
- case IOR:
- *rdd = rs1 | operand2;
- break;
- case IORCC:
- *rdd = rs1 | operand2;
- log_cc(*rdd, sregs);
- break;
- case IORN:
- *rdd = rs1 | ~operand2;
- break;
- case IORNCC:
- *rdd = rs1 | ~operand2;
- log_cc(*rdd, sregs);
- break;
- case IANDNCC:
- *rdd = rs1 & ~operand2;
- log_cc(*rdd, sregs);
- break;
- case IANDN:
- *rdd = rs1 & ~operand2;
- break;
- case IAND:
- *rdd = rs1 & operand2;
- break;
- case IANDCC:
- *rdd = rs1 & operand2;
- log_cc(*rdd, sregs);
- break;
- case SUB:
- *rdd = rs1 - operand2;
- break;
- case SUBCC:
- *rdd = rs1 - operand2;
- sub_cc(rs1, operand2, *rdd, sregs);
- break;
- case SUBX:
- *rdd = rs1 - operand2 - ((sregs->psr >> 20) & 1);
- break;
- case SUBXCC:
- *rdd = rs1 - operand2 - ((sregs->psr >> 20) & 1);
- sub_cc(rs1, operand2, *rdd, sregs);
- break;
- case ADD:
- *rdd = rs1 + operand2;
- break;
- case ADDCC:
- *rdd = rs1 + operand2;
- add_cc(rs1, operand2, *rdd, &sregs->psr);
- break;
- case ADDX:
- *rdd = rs1 + operand2 + ((sregs->psr >> 20) & 1);
- break;
- case ADDXCC:
- *rdd = rs1 + operand2 + ((sregs->psr >> 20) & 1);
- add_cc(rs1, operand2, *rdd, &sregs->psr);
- break;
- case TADDCC:
- *rdd = rs1 + operand2;
- add_cc(rs1, operand2, *rdd, &sregs->psr);
- if ((rs1 | operand2) & 0x3)
- sregs->psr |= PSR_V;
- break;
- case TADDCCTV:
- *rdd = rs1 + operand2;
- result = 0;
- add_cc(rs1, operand2, *rdd, &result);
- if ((rs1 | operand2) & 0x3)
- result |= PSR_V;
- if (result & PSR_V) {
- sregs->trap = TRAP_TAG;
- } else {
- sregs->psr = (sregs->psr & PSR_CC) | result;
- }
- break;
- case SLL:
- *rdd = rs1 << (operand2 & 0x1f);
- break;
- case SRL:
- *rdd = rs1 >> (operand2 & 0x1f);
- break;
- case SRA:
- *rdd = ((int) rs1) >> (operand2 & 0x1f);
- break;
- case SAVE:
- new_cwp = ((sregs->psr & PSR_CWP) - 1) & PSR_CWP;
- if (sregs->wim & (1 << new_cwp)) {
- sregs->trap = TRAP_WOFL;
- break;
- }
- if (rd > 7)
- rdd = &(sregs->r[((new_cwp << 4) + rd) & 0x7f]);
- *rdd = rs1 + operand2;
- sregs->psr = (sregs->psr & ~PSR_CWP) | new_cwp;
- break;
- case RESTORE:
-
-#ifdef IUREV0
- if ((iurev0) && ((sregs->jmpltime + 1) == sregs->ninst)) {
- if (!(sregs->rett_err)) {
- sregs->rett_err = 1;
- if (sis_verbose)
- printf("IU rev.0 bug mode entered\n");
- }
- }
-#endif
-
- new_cwp = ((sregs->psr & PSR_CWP) + 1) & PSR_CWP;
- if (sregs->wim & (1 << new_cwp)) {
- sregs->trap = TRAP_WUFL;
- break;
- }
- if (rd > 7)
- rdd = &(sregs->r[((new_cwp << 4) + rd) & 0x7f]);
- *rdd = rs1 + operand2;
- sregs->psr = (sregs->psr & ~PSR_CWP) | new_cwp;
- break;
- case RDPSR:
- if (!(sregs->psr & PSR_S)) {
- sregs->trap = TRAP_PRIVI;
- break;
- }
- *rdd = sregs->psr;
-#ifdef IUREV0
-
- if (iurev0 & sregs->rett_err) {
- operand2 = sregs->psr;
- *rdd |= PSR_ET;
- *rdd &= ~(PSR_S);
- *rdd |= ((*rdd & PSR_PS) << 1);
- if (sis_verbose) {
- if (operand2 != *rdd)
- printf("rdpsr failed: %08X -> %08X\n", operand2, *rdd);
- }
- }
-#endif
- break;
- case RDY:
- if (!(sregs->psr & PSR_S)) {
- sregs->trap = TRAP_PRIVI;
- break;
- }
- *rdd = sregs->y;
- break;
- case RDWIM:
- if (!(sregs->psr & PSR_S)) {
- sregs->trap = TRAP_PRIVI;
- break;
- }
- *rdd = sregs->wim;
- break;
- case RDTBR:
- if (!(sregs->psr & PSR_S)) {
- sregs->trap = TRAP_PRIVI;
- break;
- }
- *rdd = sregs->tbr;
- break;
- case WRPSR:
- if ((sregs->psr & 0x1f) > 7) {
- sregs->trap = TRAP_UNIMP;
- break;
- }
- if (!(sregs->psr & PSR_S)) {
- sregs->trap = TRAP_PRIVI;
- break;
- }
- sregs->psr = (rs1 ^ operand2) & 0x00f03fff;
- break;
- case WRWIM:
- if (!(sregs->psr & PSR_S)) {
- sregs->trap = TRAP_PRIVI;
- break;
- }
- sregs->wim = (rs1 ^ operand2) & 0x0ff;
- break;
- case WRTBR:
- if (!(sregs->psr & PSR_S)) {
- sregs->trap = TRAP_PRIVI;
- break;
- }
- sregs->tbr = (sregs->tbr & 0x00000ff0) |
- ((rs1 ^ operand2) & 0xfffff000);
- break;
- case WRY:
- sregs->y = (rs1 ^ operand2);
- break;
- case JMPL:
-
-#ifdef IUREV0
- if (iurev0)
- sregs->jmpltime = sregs->ninst;
-#endif
-#ifdef STAT
- sregs->nbranch++;
-#endif
- sregs->icnt = T_JMPL; /* JMPL takes two cycles */
- if (rs1 & 0x3) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- *rdd = sregs->pc;
- npc = rs1 + operand2;
- break;
- case RETT:
-#ifdef IUREV0
- if (iurev0 && sregs->rett_err) {
- sregs->rett_err = 0;
- if (sis_verbose)
- printf("IU rev.0 bug mode reset\n");
- }
-#endif
-
- address = rs1 + operand2;
- new_cwp = ((sregs->psr & PSR_CWP) + 1) & PSR_CWP;
- sregs->icnt = T_RETT; /* RETT takes two cycles */
- if (sregs->psr & PSR_ET) {
- sregs->trap = TRAP_UNIMP;
- break;
- }
- if (!(sregs->psr & PSR_S)) {
- sregs->trap = TRAP_PRIVI;
- break;
- }
- if (sregs->wim & (1 << new_cwp)) {
- sregs->trap = TRAP_WUFL;
- break;
- }
- if (address & 0x3) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- sregs->psr = (sregs->psr & ~PSR_CWP) | new_cwp | PSR_ET;
- sregs->psr =
- (sregs->psr & ~PSR_S) | ((sregs->psr & PSR_PS) << 1);
- npc = address;
- break;
-
- default:
- sregs->trap = TRAP_UNIMP;
- break;
- }
- }
- break;
- case 3: /* Load/store instructions */
-
- address = rs1 + operand2;
-
- /* Check for load/store to alternate address space */
-
- if ((op3 >> 4) == 1) {
- if (!(sregs->psr & PSR_S)) {
- sregs->trap = TRAP_PRIVI;
- break;
- } else if (sregs->inst & INST_I) {
- sregs->trap = TRAP_UNIMP;
- break;
- } else
- asi = (sregs->inst >> 5) & 0x0ff;
- } else {
- if (sregs->psr & PSR_S)
- asi = 11;
- else
- asi = 10;
-#ifdef IUREV0
- if (iurev0 && sregs->rett_err) {
- asi &= ~0x1;
- asi |= ((sregs->psr & PSR_PS) >> 6);
- }
-#endif
- }
-
- if (op3 & 4) {
- sregs->icnt = T_ST; /* Set store instruction count */
-#ifdef STAT
- sregs->nstore++;
-#endif
- } else {
- sregs->icnt = T_LD; /* Set load instruction count */
-#ifdef STAT
- sregs->nload++;
-#endif
- }
-
- /* Decode load/store instructions */
-
- switch (op3) {
- case LDDA:
- case LDD:
- if (address & 0x7) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- if (rd & 1) {
- rd &= 0x1e;
- if (rd > 7)
- rdd = &(sregs->r[(cwp + rd) & 0x7f]);
- else
- rdd = &(sregs->g[rd]);
- }
- mexc = memory_read(asi, address, &data, &ws);
- sregs->hold += ws;
- sregs->icnt = T_LDD;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- } else {
- rdd[0] = data;
- address += 4;
- mexc = memory_read(asi, address, &data, &ws);
- sregs->hold += ws;
-#ifdef STAT
- sregs->nload++; /* Double load counts twice */
-#endif
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- } else {
- rdd[1] = data;
- }
- }
- break;
-
- case LDA:
- case LD:
- if (address & 0x3) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- mexc = memory_read(asi, address, &data, &ws);
- sregs->hold += ws;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- } else {
- *rdd = data;
- }
- break;
- case LDSTUB:
- case LDSTUBA:
- mexc = memory_read(asi, address, &data, &ws);
- sregs->hold += ws;
- sregs->icnt = T_LDST;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- break;
- }
- data = (data >> ((3 - (address & 0x3)) << 3)) & 0x0ff;
- *rdd = data;
- data = 0x0ff;
- mexc = memory_write(asi, address, &data, 0, &ws);
- sregs->hold += ws;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- }
-#ifdef STAT
- sregs->nload++;
-#endif
- break;
- case LDSBA:
- case LDUBA:
- case LDSB:
- case LDUB:
- mexc = memory_read(asi, address, &data, &ws);
- sregs->hold += ws;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- break;
- }
- data = (data >> ((3 - (address & 0x3)) << 3)) & 0x0ff;
- if ((op3 == LDSB) && (data >> 7))
- data |= 0xffffff00;
- *rdd = data;
- break;
- case LDSHA:
- case LDUHA:
- case LDSH:
- case LDUH:
- if (address & 0x1) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- mexc = memory_read(asi, address, &data, &ws);
- sregs->hold += ws;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- break;
- }
- if (!(address & 0x2))
- data >>= 16;
- data &= 0x0ffff;
- if ((op3 == LDSH) && (data >> 15))
- data |= 0xffff0000;
- *rdd = data;
- break;
- case LDF:
- if (!((sregs->psr & PSR_EF) && chk_fp(sregs))) {
- sregs->trap = TRAP_FPDIS;
- break;
- }
- if (address & 0x3) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- if (ebase.simtime < sregs->ftime) {
- if ((sregs->frd == rd) || (sregs->frs1 == rd) ||
- (sregs->frs2 == rd))
- sregs->fhold += (sregs->ftime - ebase.simtime);
- }
- mexc = memory_read(asi, address, &data, &ws);
- sregs->hold += ws;
- sregs->flrd = rd;
- sregs->ltime = ebase.simtime + sregs->icnt + FLSTHOLD +
- sregs->hold + sregs->fhold;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- } else {
- sregs->fs[rd] = *((float32 *) & data);
- }
- break;
- case LDDF:
- if (!((sregs->psr & PSR_EF) && chk_fp(sregs))) {
- sregs->trap = TRAP_FPDIS;
- break;
- }
- if (address & 0x7) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- if (ebase.simtime < sregs->ftime) {
- if (((sregs->frd >> 1) == (rd >> 1)) ||
- ((sregs->frs1 >> 1) == (rd >> 1)) ||
- ((sregs->frs2 >> 1) == (rd >> 1)))
- sregs->fhold += (sregs->ftime - ebase.simtime);
- }
- mexc = memory_read(asi, address, &data, &ws);
- sregs->hold += ws;
- sregs->icnt = T_LDD;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- } else {
- rd &= 0x1E;
- sregs->flrd = rd;
- sregs->fs[rd] = *((float32 *) & data);
- mexc = memory_read(asi, address + 4, &data, &ws);
- sregs->hold += ws;
-#ifdef STAT
- sregs->nload++; /* Double load counts twice */
-#endif
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- } else {
- sregs->fs[rd + 1] = *((float32 *) & data);
- sregs->ltime = ebase.simtime + sregs->icnt + FLSTHOLD +
- sregs->hold + sregs->fhold;
- }
- }
- break;
- case LDFSR:
- if (ebase.simtime < sregs->ftime) {
- sregs->fhold += (sregs->ftime - ebase.simtime);
- }
- if (!((sregs->psr & PSR_EF) && chk_fp(sregs))) {
- sregs->trap = TRAP_FPDIS;
- break;
- }
- if (address & 0x3) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- mexc = memory_read(asi, address, &data, &ws);
- sregs->hold += ws;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- } else {
- sregs->fsr =
- (sregs->fsr & 0x7FF000) | (data & ~0x7FF000);
- set_fsr(sregs->fsr);
- }
- break;
- case STFSR:
- if (!((sregs->psr & PSR_EF) && chk_fp(sregs))) {
- sregs->trap = TRAP_FPDIS;
- break;
- }
- if (address & 0x3) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- if (ebase.simtime < sregs->ftime) {
- sregs->fhold += (sregs->ftime - ebase.simtime);
- }
- mexc = memory_write(asi, address, &sregs->fsr, 2, &ws);
- sregs->hold += ws;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- }
- break;
-
- case ST:
- case STA:
- if (address & 0x3) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- mexc = memory_write(asi, address, rdd, 2, &ws);
- sregs->hold += ws;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- }
- break;
- case STB:
- case STBA:
- mexc = memory_write(asi, address, rdd, 0, &ws);
- sregs->hold += ws;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- }
- break;
- case STD:
- case STDA:
- if (address & 0x7) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- if (rd & 1) {
- rd &= 0x1e;
- if (rd > 7)
- rdd = &(sregs->r[(cwp + rd) & 0x7f]);
- else
- rdd = &(sregs->g[rd]);
- }
- mexc = memory_write(asi, address, rdd, 3, &ws);
- sregs->hold += ws;
- sregs->icnt = T_STD;
-#ifdef STAT
- sregs->nstore++; /* Double store counts twice */
-#endif
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- break;
- }
- break;
- case STDFQ:
- if ((sregs->psr & 0x1f) > 7) {
- sregs->trap = TRAP_UNIMP;
- break;
- }
- if (!((sregs->psr & PSR_EF) && chk_fp(sregs))) {
- sregs->trap = TRAP_FPDIS;
- break;
- }
- if (address & 0x7) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- if (!(sregs->fsr & FSR_QNE)) {
- sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_SEQ_ERR;
- break;
- }
- rdd = &(sregs->fpq[0]);
- mexc = memory_write(asi, address, rdd, 3, &ws);
- sregs->hold += ws;
- sregs->icnt = T_STD;
-#ifdef STAT
- sregs->nstore++; /* Double store counts twice */
-#endif
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- break;
- } else {
- sregs->fsr &= ~FSR_QNE;
- sregs->fpstate = FP_EXE_MODE;
- }
- break;
- case STHA:
- case STH:
- if (address & 0x1) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- mexc = memory_write(asi, address, rdd, 1, &ws);
- sregs->hold += ws;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- }
- break;
- case STF:
- if (!((sregs->psr & PSR_EF) && chk_fp(sregs))) {
- sregs->trap = TRAP_FPDIS;
- break;
- }
- if (address & 0x3) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- if (ebase.simtime < sregs->ftime) {
- if (sregs->frd == rd)
- sregs->fhold += (sregs->ftime - ebase.simtime);
- }
- mexc = memory_write(asi, address, &sregs->fsi[rd], 2, &ws);
- sregs->hold += ws;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- }
- break;
- case STDF:
- if (!((sregs->psr & PSR_EF) && chk_fp(sregs))) {
- sregs->trap = TRAP_FPDIS;
- break;
- }
- if (address & 0x7) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- rd &= 0x1E;
- if (ebase.simtime < sregs->ftime) {
- if ((sregs->frd == rd) || (sregs->frd + 1 == rd))
- sregs->fhold += (sregs->ftime - ebase.simtime);
- }
- mexc = memory_write(asi, address, &sregs->fsi[rd], 3, &ws);
- sregs->hold += ws;
- sregs->icnt = T_STD;
-#ifdef STAT
- sregs->nstore++; /* Double store counts twice */
-#endif
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- }
- break;
- case SWAP:
- case SWAPA:
- if (address & 0x3) {
- sregs->trap = TRAP_UNALI;
- break;
- }
- mexc = memory_read(asi, address, &data, &ws);
- sregs->hold += ws;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- break;
- }
- mexc = memory_write(asi, address, rdd, 2, &ws);
- sregs->hold += ws;
- sregs->icnt = T_LDST;
- if (mexc) {
- sregs->trap = TRAP_DEXC;
- break;
- } else
- *rdd = data;
-#ifdef STAT
- sregs->nload++;
-#endif
- break;
-
-
- default:
- sregs->trap = TRAP_UNIMP;
- break;
- }
-
-#ifdef LOAD_DEL
-
- if (!(op3 & 4)) {
- sregs->ildtime = ebase.simtime + sregs->hold + sregs->icnt;
- sregs->ildreg = rd;
- if ((op3 | 0x10) == 0x13)
- sregs->ildreg |= 1; /* Double load, odd register loaded
- * last */
- }
-#endif
- break;
-
- default:
- sregs->trap = TRAP_UNIMP;
- break;
- }
- sregs->g[0] = 0;
- if (!sregs->trap) {
- sregs->pc = pc;
- sregs->npc = npc;
- }
- return (0);
-}
-
-#define T_FABSs 2
-#define T_FADDs 4
-#define T_FADDd 4
-#define T_FCMPs 4
-#define T_FCMPd 4
-#define T_FDIVs 20
-#define T_FDIVd 35
-#define T_FMOVs 2
-#define T_FMULs 5
-#define T_FMULd 9
-#define T_FNEGs 2
-#define T_FSQRTs 37
-#define T_FSQRTd 65
-#define T_FSUBs 4
-#define T_FSUBd 4
-#define T_FdTOi 7
-#define T_FdTOs 3
-#define T_FiTOs 6
-#define T_FiTOd 6
-#define T_FsTOi 6
-#define T_FsTOd 2
-
-#define FABSs 0x09
-#define FADDs 0x41
-#define FADDd 0x42
-#define FCMPs 0x51
-#define FCMPd 0x52
-#define FCMPEs 0x55
-#define FCMPEd 0x56
-#define FDIVs 0x4D
-#define FDIVd 0x4E
-#define FMOVs 0x01
-#define FMULs 0x49
-#define FMULd 0x4A
-#define FNEGs 0x05
-#define FSQRTs 0x29
-#define FSQRTd 0x2A
-#define FSUBs 0x45
-#define FSUBd 0x46
-#define FdTOi 0xD2
-#define FdTOs 0xC6
-#define FiTOs 0xC4
-#define FiTOd 0xC8
-#define FsTOi 0xD1
-#define FsTOd 0xC9
-
-
-int
-fpexec(op3, rd, rs1, rs2, sregs)
- uint32 op3, rd, rs1, rs2;
- struct pstate *sregs;
-{
- uint32 opf, tem, accex;
- float32 ftmps;
- float64 ftmpd;
- int32 fcc;
- char *res;
- uint32 ldadj;
-
- if (sregs->fpstate == FP_EXC_MODE) {
- sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_SEQ_ERR;
- sregs->fpstate == FP_EXC_PE;
- return (0);
- }
- if (sregs->fpstate == FP_EXC_PE) {
- sregs->fpstate = FP_EXC_MODE;
- return (TRAP_FPEXC);
- }
- opf = (sregs->inst >> 5) & 0x1ff;
-
- /*
- * Check if we already have an FPop in the pipe. If so, halt until it is
- * finished by incrementing fhold with the remaining execution time
- */
-
- if (ebase.simtime < sregs->ftime) {
- sregs->fhold = (sregs->ftime - ebase.simtime);
- } else {
- sregs->fhold = 0;
-
- /* Check load dependencies. */
-
- if (ebase.simtime < sregs->ltime) {
-
- /* Don't check rs1 if single operand instructions */
-
- if (((opf >> 6) == 0) || ((opf >> 6) == 3))
- rs1 = 32;
-
- /* Adjust for double floats */
-
- ldadj = opf & 1;
- if (!(((sregs->flrd - rs1) >> ldadj) && ((sregs->flrd - rs2) >> ldadj)))
- sregs->fhold++;
- }
- }
-
- sregs->finst++;
-
- sregs->frs1 = rs1; /* Store src and dst for dependecy check */
- sregs->frs2 = rs2;
- sregs->frd = rd;
-
- sregs->ftime = ebase.simtime + sregs->hold + sregs->fhold;
-
- /* SPARC is big-endian - swap double floats if host is little-endian */
- /* This is ugly - I know ... */
-#ifdef HOST_LITTLE_ENDIAN_FLOAT
- rs1 &= 0x1f;
- switch (opf) {
- case FADDd:
- case FDIVd:
- case FMULd:
- case FSQRTd:
- case FSUBd:
- case FCMPd:
- case FCMPEd:
- case FdTOi:
- case FdTOs:
- sregs->fdp[rs1 | 1] = sregs->fs[rs1 & ~1];
- sregs->fdp[rs1 & ~1] = sregs->fs[rs1 | 1];
- sregs->fdp[rs2 | 1] = sregs->fs[rs2 & ~1];
- sregs->fdp[rs2 & ~1] = sregs->fs[rs2 | 1];
- default:
- }
-#endif
-
- clear_accex();
-
- switch (opf) {
- case FABSs:
- sregs->fs[rd] = fabs(sregs->fs[rs2]);
- sregs->ftime += T_FABSs;
- sregs->frs1 = 32; /* rs1 ignored */
- break;
- case FADDs:
- sregs->fs[rd] = sregs->fs[rs1] + sregs->fs[rs2];
- sregs->ftime += T_FADDs;
- break;
- case FADDd:
- sregs->fd[rd >> 1] = sregs->fd[rs1 >> 1] + sregs->fd[rs2 >> 1];
- sregs->ftime += T_FADDd;
- break;
- case FCMPs:
- case FCMPEs:
- if (sregs->fs[rs1] == sregs->fs[rs2])
- fcc = 3;
- else if (sregs->fs[rs1] < sregs->fs[rs2])
- fcc = 2;
- else if (sregs->fs[rs1] > sregs->fs[rs2])
- fcc = 1;
- else
- fcc = 0;
- sregs->fsr |= 0x0C00;
- sregs->fsr &= ~(fcc << 10);
- sregs->ftime += T_FCMPs;
- sregs->frd = 32; /* rd ignored */
- if ((fcc == 0) && (opf == FCMPEs)) {
- sregs->fpstate == FP_EXC_PE;
- sregs->fsr = (sregs->fsr & ~0x1C000) | (1 << 14);
- }
- break;
- case FCMPd:
- case FCMPEd:
- if (sregs->fd[rs1 >> 1] == sregs->fd[rs2 >> 1])
- fcc = 3;
- else if (sregs->fd[rs1 >> 1] < sregs->fd[rs2 >> 1])
- fcc = 2;
- else if (sregs->fd[rs1 >> 1] > sregs->fd[rs2 >> 1])
- fcc = 1;
- else
- fcc = 0;
- sregs->fsr |= 0x0C00;
- sregs->fsr &= ~(fcc << 10);
- sregs->ftime += T_FCMPd;
- sregs->frd = 32; /* rd ignored */
- if ((fcc == 0) && (opf == FCMPEd)) {
- sregs->fpstate == FP_EXC_PE;
- sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_IEEE;
- }
- break;
- case FDIVs:
- sregs->fs[rd] = sregs->fs[rs1] / sregs->fs[rs2];
- sregs->ftime += T_FDIVs;
- break;
- case FDIVd:
- sregs->fd[rd >> 1] = sregs->fd[rs1 >> 1] / sregs->fd[rs2 >> 1];
- sregs->ftime += T_FDIVd;
- break;
- case FMOVs:
- sregs->fs[rd] = sregs->fs[rs2];
- sregs->ftime += T_FMOVs;
- sregs->frs1 = 32; /* rs1 ignored */
- break;
- case FMULs:
- sregs->fs[rd] = sregs->fs[rs1] * sregs->fs[rs2];
- sregs->ftime += T_FMULs;
- break;
- case FMULd:
- sregs->fd[rd >> 1] = sregs->fd[rs1 >> 1] * sregs->fd[rs2 >> 1];
- sregs->ftime += T_FMULd;
- break;
- case FNEGs:
- sregs->fs[rd] = -sregs->fs[rs2];
- sregs->ftime += T_FNEGs;
- sregs->frs1 = 32; /* rs1 ignored */
- break;
- case FSQRTs:
- if (sregs->fs[rs2] < 0.0) {
- sregs->fpstate == FP_EXC_PE;
- sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_IEEE;
- sregs->fsr = (sregs->fsr & 0x1f) | 0x10;
- break;
- }
- sregs->fs[rd] = sqrt(sregs->fs[rs2]);
- sregs->ftime += T_FSQRTs;
- sregs->frs1 = 32; /* rs1 ignored */
- break;
- case FSQRTd:
- if (sregs->fd[rs2 >> 1] < 0.0) {
- sregs->fpstate == FP_EXC_PE;
- sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_IEEE;
- sregs->fsr = (sregs->fsr & 0x1f) | 0x10;
- break;
- }
- sregs->fd[rd >> 1] = sqrt(sregs->fd[rs2 >> 1]);
- sregs->ftime += T_FSQRTd;
- sregs->frs1 = 32; /* rs1 ignored */
- break;
- case FSUBs:
- sregs->fs[rd] = sregs->fs[rs1] - sregs->fs[rs2];
- sregs->ftime += T_FSUBs;
- break;
- case FSUBd:
- sregs->fd[rd >> 1] = sregs->fd[rs1 >> 1] - sregs->fd[rs2 >> 1];
- sregs->ftime += T_FSUBd;
- break;
- case FdTOi:
- sregs->fsi[rd] = (int) sregs->fd[rs2 >> 1];
- sregs->ftime += T_FdTOi;
- sregs->frs1 = 32; /* rs1 ignored */
- break;
- case FdTOs:
- sregs->fs[rd] = (float32) sregs->fd[rs2 >> 1];
- sregs->ftime += T_FdTOs;
- sregs->frs1 = 32; /* rs1 ignored */
- break;
- case FiTOs:
- sregs->fs[rd] = (float32) sregs->fsi[rs2];
- sregs->ftime += T_FiTOs;
- sregs->frs1 = 32; /* rs1 ignored */
- break;
- case FiTOd:
- sregs->fd[rd >> 1] = (float64) sregs->fsi[rs2];
- sregs->ftime += T_FiTOd;
- sregs->frs1 = 32; /* rs1 ignored */
- break;
- case FsTOi:
- sregs->fsi[rd] = (int) sregs->fs[rs2];
- sregs->ftime += T_FsTOi;
- sregs->frs1 = 32; /* rs1 ignored */
- break;
- case FsTOd:
- sregs->fd[rd >> 1] = sregs->fs[rs2];
- sregs->ftime += T_FsTOd;
- sregs->frs1 = 32; /* rs1 ignored */
- break;
-
- default:
- sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_UNIMP;
- sregs->fpstate == FP_EXC_PE;
- }
-
- accex = get_accex();
-
-#ifdef HOST_LITTLE_ENDIAN_FLOAT
- switch (opf) {
- case FADDd:
- case FDIVd:
- case FMULd:
- case FSQRTd:
- case FSUBd:
- case FiTOd:
- case FsTOd:
- sregs->fs[rd & ~1] = sregs->fdp[rd | 1];
- sregs->fs[rd | 1] = sregs->fdp[rd & ~1];
- default:
- }
-#endif
- if (sregs->fpstate == FP_EXC_PE) {
- sregs->fpq[0] = sregs->pc;
- sregs->fpq[1] = sregs->inst;
- sregs->fsr |= FSR_QNE;
- } else {
- tem = (sregs->fsr >> 23) & 0x1f;
- if (tem & accex) {
- sregs->fpstate = FP_EXC_PE;
- sregs->fsr = (sregs->fsr & ~FSR_TT) | FP_IEEE;
- sregs->fsr = ((sregs->fsr & ~0x1f) | accex);
- } else {
- sregs->fsr = ((((sregs->fsr >> 5) | accex) << 5) | accex);
- }
- if (sregs->fpstate == FP_EXC_PE) {
- sregs->fpq[0] = sregs->pc;
- sregs->fpq[1] = sregs->inst;
- sregs->fsr |= FSR_QNE;
- }
- }
- clear_accex();
-
- return (0);
-
-
-}
-
-int
-execute_trap(sregs)
- struct pstate *sregs;
-{
- int32 cwp;
-
- if (sregs->trap == 256) {
- sregs->pc = 0;
- sregs->npc = 4;
- sregs->trap = 0;
- } else {
-
- if ((sregs->psr & PSR_ET) == 0)
- return (ERROR);
-
- sregs->tbr = (sregs->tbr & 0xfffff000) | (sregs->trap << 4);
- sregs->trap = 0;
- sregs->psr &= ~PSR_ET;
- sregs->psr |= ((sregs->psr & PSR_S) >> 1);
- sregs->annul = 0;
- sregs->psr = (((sregs->psr & PSR_CWP) - 1) & 0x7) | (sregs->psr & ~PSR_CWP);
- cwp = ((sregs->psr & PSR_CWP) << 4);
- sregs->r[(cwp + 17) & 0x7f] = sregs->pc;
- sregs->r[(cwp + 18) & 0x7f] = sregs->npc;
- sregs->psr |= PSR_S;
- sregs->pc = sregs->tbr;
- sregs->npc = sregs->tbr + 4;
-
- /* Increase simulator time */
- sregs->icnt = TRAP_C;
-
- }
-
-
- return (0);
-
-}
-
-extern struct irqcell irqarr[16];
-
-void
-check_interrupts(sregs)
- struct pstate *sregs;
-{
- if ((ext_irl) && (sregs->psr & PSR_ET) &&
- ((ext_irl == 15) || (ext_irl > ((sregs->psr & PSR_PIL) >> 8)))) {
- if (sregs->trap == 0) {
- sregs->trap = 16 + ext_irl;
- irqarr[ext_irl & 0x0f].callback(irqarr[ext_irl & 0x0f].arg);
- clear_int(ext_irl);
- }
- }
-}
-
-init_regs(sregs)
- struct pstate *sregs;
-{
- int32 i;
-
- sregs->pc = 0;
- sregs->npc = 4;
- sregs->trap = 0;
- sregs->psr &= 0x00f03fdf;
- sregs->psr |= 0x080; /* Set supervisor bit */
- sregs->breakpoint = 0;
- sregs->annul = 0;
- sregs->fpstate = FP_EXE_MODE;
- sregs->fpqn = 0;
- sregs->ftime = 0;
- sregs->ltime = 0;
- sregs->err_mode = 0;
- ext_irl = 0;
- irqpend = 0;
- sregs->g[0] = 0;
-#ifdef HOST_LITTLE_ENDIAN_FLOAT
- sregs->fdp = (float32 *) sregs->fd;
- sregs->fsi = (int32 *) sregs->fs;
-#else
- sregs->fs = (float32 *) sregs->fd;
- sregs->fsi = (int32 *) sregs->fd;
-#endif
- sregs->fsr = 0;
- sregs->fpu_pres = !nfp;
- set_fsr(sregs->fsr);
- sregs->bphit = 0;
- sregs->ildreg = 0;
- sregs->ildtime = 0;
-
- sregs->rett_err = 0;
- sregs->jmpltime = 0;
-}
-
-chk_fp(sregs)
- struct pstate *sregs;
-{
- return (sregs->fpu_pres);
-}
generated by cgit v1.1 at 2024-12-12 00:27:57 +0000