root / target-m68k / helper.c @ b42ec42d
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1 | e6e5906b | pbrook | /*
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2 | e6e5906b | pbrook | * m68k op helpers
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3 | 5fafdf24 | ths | *
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4 | 0633879f | pbrook | * Copyright (c) 2006-2007 CodeSourcery
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5 | e6e5906b | pbrook | * Written by Paul Brook
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6 | e6e5906b | pbrook | *
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7 | e6e5906b | pbrook | * This library is free software; you can redistribute it and/or
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8 | e6e5906b | pbrook | * modify it under the terms of the GNU Lesser General Public
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9 | e6e5906b | pbrook | * License as published by the Free Software Foundation; either
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10 | e6e5906b | pbrook | * version 2 of the License, or (at your option) any later version.
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11 | e6e5906b | pbrook | *
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12 | e6e5906b | pbrook | * This library is distributed in the hope that it will be useful,
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13 | e6e5906b | pbrook | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | e6e5906b | pbrook | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 | e6e5906b | pbrook | * General Public License for more details.
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16 | e6e5906b | pbrook | *
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17 | e6e5906b | pbrook | * You should have received a copy of the GNU Lesser General Public
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18 | e6e5906b | pbrook | * License along with this library; if not, write to the Free Software
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19 | fad6cb1a | aurel32 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
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20 | e6e5906b | pbrook | */
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21 | e6e5906b | pbrook | |
22 | e6e5906b | pbrook | #include <stdio.h> |
23 | 0402f767 | pbrook | #include <string.h> |
24 | e6e5906b | pbrook | |
25 | e6e5906b | pbrook | #include "config.h" |
26 | e6e5906b | pbrook | #include "cpu.h" |
27 | e6e5906b | pbrook | #include "exec-all.h" |
28 | ca10f867 | aurel32 | #include "qemu-common.h" |
29 | 56aebc89 | pbrook | #include "gdbstub.h" |
30 | e6e5906b | pbrook | |
31 | e1f3808e | pbrook | #include "helpers.h" |
32 | e1f3808e | pbrook | |
33 | e1f3808e | pbrook | #define SIGNBIT (1u << 31) |
34 | e1f3808e | pbrook | |
35 | 0402f767 | pbrook | enum m68k_cpuid {
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36 | 0402f767 | pbrook | M68K_CPUID_M5206, |
37 | 20dcee94 | pbrook | M68K_CPUID_M5208, |
38 | 0402f767 | pbrook | M68K_CPUID_CFV4E, |
39 | 0402f767 | pbrook | M68K_CPUID_ANY, |
40 | 0402f767 | pbrook | }; |
41 | 0402f767 | pbrook | |
42 | aaed909a | bellard | typedef struct m68k_def_t m68k_def_t; |
43 | aaed909a | bellard | |
44 | 0402f767 | pbrook | struct m68k_def_t {
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45 | 0402f767 | pbrook | const char * name; |
46 | 0402f767 | pbrook | enum m68k_cpuid id;
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47 | 0402f767 | pbrook | }; |
48 | 0402f767 | pbrook | |
49 | 0402f767 | pbrook | static m68k_def_t m68k_cpu_defs[] = {
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50 | 5fafdf24 | ths | {"m5206", M68K_CPUID_M5206},
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51 | 5fafdf24 | ths | {"m5208", M68K_CPUID_M5208},
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52 | 0402f767 | pbrook | {"cfv4e", M68K_CPUID_CFV4E},
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53 | 0402f767 | pbrook | {"any", M68K_CPUID_ANY},
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54 | 5fafdf24 | ths | {NULL, 0}, |
55 | 0402f767 | pbrook | }; |
56 | 0402f767 | pbrook | |
57 | 56aebc89 | pbrook | static int fpu_gdb_get_reg(CPUState *env, uint8_t *mem_buf, int n) |
58 | 56aebc89 | pbrook | { |
59 | 56aebc89 | pbrook | if (n < 8) { |
60 | 56aebc89 | pbrook | stfq_p(mem_buf, env->fregs[n]); |
61 | 56aebc89 | pbrook | return 8; |
62 | 56aebc89 | pbrook | } |
63 | 56aebc89 | pbrook | if (n < 11) { |
64 | 56aebc89 | pbrook | /* FP control registers (not implemented) */
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65 | 56aebc89 | pbrook | memset(mem_buf, 0, 4); |
66 | 56aebc89 | pbrook | return 4; |
67 | 56aebc89 | pbrook | } |
68 | 56aebc89 | pbrook | return 0; |
69 | 56aebc89 | pbrook | } |
70 | 56aebc89 | pbrook | |
71 | 56aebc89 | pbrook | static int fpu_gdb_set_reg(CPUState *env, uint8_t *mem_buf, int n) |
72 | 56aebc89 | pbrook | { |
73 | 56aebc89 | pbrook | if (n < 8) { |
74 | 56aebc89 | pbrook | env->fregs[n] = ldfq_p(mem_buf); |
75 | 56aebc89 | pbrook | return 8; |
76 | 56aebc89 | pbrook | } |
77 | 56aebc89 | pbrook | if (n < 11) { |
78 | 56aebc89 | pbrook | /* FP control registers (not implemented) */
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79 | 56aebc89 | pbrook | return 4; |
80 | 56aebc89 | pbrook | } |
81 | 56aebc89 | pbrook | return 0; |
82 | 56aebc89 | pbrook | } |
83 | 56aebc89 | pbrook | |
84 | 0402f767 | pbrook | static void m68k_set_feature(CPUM68KState *env, int feature) |
85 | 0402f767 | pbrook | { |
86 | 0402f767 | pbrook | env->features |= (1u << feature);
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87 | 0402f767 | pbrook | } |
88 | 0402f767 | pbrook | |
89 | aaed909a | bellard | static int cpu_m68k_set_model(CPUM68KState *env, const char *name) |
90 | 0402f767 | pbrook | { |
91 | 0402f767 | pbrook | m68k_def_t *def; |
92 | 0402f767 | pbrook | |
93 | 0402f767 | pbrook | for (def = m68k_cpu_defs; def->name; def++) {
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94 | 0402f767 | pbrook | if (strcmp(def->name, name) == 0) |
95 | 0402f767 | pbrook | break;
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96 | 0402f767 | pbrook | } |
97 | 0402f767 | pbrook | if (!def->name)
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98 | aaed909a | bellard | return -1; |
99 | 0402f767 | pbrook | |
100 | 0402f767 | pbrook | switch (def->id) {
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101 | 0402f767 | pbrook | case M68K_CPUID_M5206:
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102 | 0402f767 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); |
103 | 0402f767 | pbrook | break;
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104 | 20dcee94 | pbrook | case M68K_CPUID_M5208:
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105 | 20dcee94 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); |
106 | d315c888 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); |
107 | d315c888 | pbrook | m68k_set_feature(env, M68K_FEATURE_BRAL); |
108 | 20dcee94 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_EMAC); |
109 | 20dcee94 | pbrook | m68k_set_feature(env, M68K_FEATURE_USP); |
110 | 20dcee94 | pbrook | break;
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111 | 0402f767 | pbrook | case M68K_CPUID_CFV4E:
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112 | 0402f767 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); |
113 | 0402f767 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); |
114 | d315c888 | pbrook | m68k_set_feature(env, M68K_FEATURE_BRAL); |
115 | 0402f767 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_FPU); |
116 | 0402f767 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_EMAC); |
117 | 20dcee94 | pbrook | m68k_set_feature(env, M68K_FEATURE_USP); |
118 | 0402f767 | pbrook | break;
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119 | 0402f767 | pbrook | case M68K_CPUID_ANY:
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120 | 0402f767 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_ISA_A); |
121 | 0402f767 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_ISA_B); |
122 | d315c888 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_ISA_APLUSC); |
123 | d315c888 | pbrook | m68k_set_feature(env, M68K_FEATURE_BRAL); |
124 | 0402f767 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_FPU); |
125 | acf930aa | pbrook | /* MAC and EMAC are mututally exclusive, so pick EMAC.
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126 | acf930aa | pbrook | It's mostly backwards compatible. */
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127 | 0402f767 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_EMAC); |
128 | d315c888 | pbrook | m68k_set_feature(env, M68K_FEATURE_CF_EMAC_B); |
129 | 20dcee94 | pbrook | m68k_set_feature(env, M68K_FEATURE_USP); |
130 | 0402f767 | pbrook | m68k_set_feature(env, M68K_FEATURE_EXT_FULL); |
131 | d315c888 | pbrook | m68k_set_feature(env, M68K_FEATURE_WORD_INDEX); |
132 | 0402f767 | pbrook | break;
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133 | 0402f767 | pbrook | } |
134 | 0402f767 | pbrook | |
135 | 0402f767 | pbrook | register_m68k_insns(env); |
136 | 56aebc89 | pbrook | if (m68k_feature (env, M68K_FEATURE_CF_FPU)) {
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137 | 56aebc89 | pbrook | gdb_register_coprocessor(env, fpu_gdb_get_reg, fpu_gdb_set_reg, |
138 | 56aebc89 | pbrook | 11, "cf-fp.xml", 18); |
139 | 56aebc89 | pbrook | } |
140 | 56aebc89 | pbrook | /* TODO: Add [E]MAC registers. */
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141 | 4f6cf9e8 | bellard | return 0; |
142 | aaed909a | bellard | } |
143 | aaed909a | bellard | |
144 | aaed909a | bellard | void cpu_reset(CPUM68KState *env)
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145 | aaed909a | bellard | { |
146 | eca1bdf4 | aliguori | if (qemu_loglevel_mask(CPU_LOG_RESET)) {
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147 | eca1bdf4 | aliguori | qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
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148 | eca1bdf4 | aliguori | log_cpu_state(env, 0);
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149 | eca1bdf4 | aliguori | } |
150 | eca1bdf4 | aliguori | |
151 | aaed909a | bellard | memset(env, 0, offsetof(CPUM68KState, breakpoints));
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152 | aaed909a | bellard | #if !defined (CONFIG_USER_ONLY)
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153 | aaed909a | bellard | env->sr = 0x2700;
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154 | aaed909a | bellard | #endif
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155 | aaed909a | bellard | m68k_switch_sp(env); |
156 | aaed909a | bellard | /* ??? FP regs should be initialized to NaN. */
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157 | aaed909a | bellard | env->cc_op = CC_OP_FLAGS; |
158 | aaed909a | bellard | /* TODO: We should set PC from the interrupt vector. */
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159 | aaed909a | bellard | env->pc = 0;
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160 | aaed909a | bellard | tlb_flush(env, 1);
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161 | aaed909a | bellard | } |
162 | aaed909a | bellard | |
163 | aaed909a | bellard | CPUM68KState *cpu_m68k_init(const char *cpu_model) |
164 | aaed909a | bellard | { |
165 | aaed909a | bellard | CPUM68KState *env; |
166 | e1f3808e | pbrook | static int inited; |
167 | aaed909a | bellard | |
168 | 6ad1d22b | pbrook | env = qemu_mallocz(sizeof(CPUM68KState));
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169 | aaed909a | bellard | cpu_exec_init(env); |
170 | e1f3808e | pbrook | if (!inited) {
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171 | e1f3808e | pbrook | inited = 1;
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172 | e1f3808e | pbrook | m68k_tcg_init(); |
173 | e1f3808e | pbrook | } |
174 | aaed909a | bellard | |
175 | 01ba9816 | ths | env->cpu_model_str = cpu_model; |
176 | 01ba9816 | ths | |
177 | aaed909a | bellard | if (cpu_m68k_set_model(env, cpu_model) < 0) { |
178 | aaed909a | bellard | cpu_m68k_close(env); |
179 | aaed909a | bellard | return NULL; |
180 | aaed909a | bellard | } |
181 | 01ba9816 | ths | |
182 | aaed909a | bellard | cpu_reset(env); |
183 | aaed909a | bellard | return env;
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184 | aaed909a | bellard | } |
185 | 0402f767 | pbrook | |
186 | aaed909a | bellard | void cpu_m68k_close(CPUM68KState *env)
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187 | aaed909a | bellard | { |
188 | aaed909a | bellard | qemu_free(env); |
189 | 0402f767 | pbrook | } |
190 | 0402f767 | pbrook | |
191 | e6e5906b | pbrook | void cpu_m68k_flush_flags(CPUM68KState *env, int cc_op) |
192 | e6e5906b | pbrook | { |
193 | e6e5906b | pbrook | int flags;
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194 | e6e5906b | pbrook | uint32_t src; |
195 | e6e5906b | pbrook | uint32_t dest; |
196 | e6e5906b | pbrook | uint32_t tmp; |
197 | e6e5906b | pbrook | |
198 | e6e5906b | pbrook | #define HIGHBIT 0x80000000u |
199 | e6e5906b | pbrook | |
200 | e6e5906b | pbrook | #define SET_NZ(x) do { \ |
201 | e6e5906b | pbrook | if ((x) == 0) \ |
202 | e6e5906b | pbrook | flags |= CCF_Z; \ |
203 | e6e5906b | pbrook | else if ((int32_t)(x) < 0) \ |
204 | e6e5906b | pbrook | flags |= CCF_N; \ |
205 | e6e5906b | pbrook | } while (0) |
206 | e6e5906b | pbrook | |
207 | e6e5906b | pbrook | #define SET_FLAGS_SUB(type, utype) do { \ |
208 | e6e5906b | pbrook | SET_NZ((type)dest); \ |
209 | e6e5906b | pbrook | tmp = dest + src; \ |
210 | e6e5906b | pbrook | if ((utype) tmp < (utype) src) \
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211 | e6e5906b | pbrook | flags |= CCF_C; \ |
212 | e6e5906b | pbrook | if ((1u << (sizeof(type) * 8 - 1)) & (tmp ^ dest) & (tmp ^ src)) \ |
213 | e6e5906b | pbrook | flags |= CCF_V; \ |
214 | e6e5906b | pbrook | } while (0) |
215 | e6e5906b | pbrook | |
216 | e6e5906b | pbrook | flags = 0;
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217 | e6e5906b | pbrook | src = env->cc_src; |
218 | e6e5906b | pbrook | dest = env->cc_dest; |
219 | e6e5906b | pbrook | switch (cc_op) {
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220 | e6e5906b | pbrook | case CC_OP_FLAGS:
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221 | e6e5906b | pbrook | flags = dest; |
222 | e6e5906b | pbrook | break;
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223 | e6e5906b | pbrook | case CC_OP_LOGIC:
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224 | e6e5906b | pbrook | SET_NZ(dest); |
225 | e6e5906b | pbrook | break;
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226 | e6e5906b | pbrook | case CC_OP_ADD:
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227 | e6e5906b | pbrook | SET_NZ(dest); |
228 | e6e5906b | pbrook | if (dest < src)
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229 | e6e5906b | pbrook | flags |= CCF_C; |
230 | e6e5906b | pbrook | tmp = dest - src; |
231 | e6e5906b | pbrook | if (HIGHBIT & (src ^ dest) & ~(tmp ^ src))
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232 | e6e5906b | pbrook | flags |= CCF_V; |
233 | e6e5906b | pbrook | break;
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234 | e6e5906b | pbrook | case CC_OP_SUB:
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235 | e6e5906b | pbrook | SET_FLAGS_SUB(int32_t, uint32_t); |
236 | e6e5906b | pbrook | break;
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237 | e6e5906b | pbrook | case CC_OP_CMPB:
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238 | e6e5906b | pbrook | SET_FLAGS_SUB(int8_t, uint8_t); |
239 | e6e5906b | pbrook | break;
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240 | e6e5906b | pbrook | case CC_OP_CMPW:
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241 | e6e5906b | pbrook | SET_FLAGS_SUB(int16_t, uint16_t); |
242 | e6e5906b | pbrook | break;
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243 | e6e5906b | pbrook | case CC_OP_ADDX:
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244 | e6e5906b | pbrook | SET_NZ(dest); |
245 | e6e5906b | pbrook | if (dest <= src)
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246 | e6e5906b | pbrook | flags |= CCF_C; |
247 | e6e5906b | pbrook | tmp = dest - src - 1;
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248 | e6e5906b | pbrook | if (HIGHBIT & (src ^ dest) & ~(tmp ^ src))
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249 | e6e5906b | pbrook | flags |= CCF_V; |
250 | e6e5906b | pbrook | break;
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251 | e6e5906b | pbrook | case CC_OP_SUBX:
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252 | e6e5906b | pbrook | SET_NZ(dest); |
253 | e6e5906b | pbrook | tmp = dest + src + 1;
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254 | e6e5906b | pbrook | if (tmp <= src)
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255 | e6e5906b | pbrook | flags |= CCF_C; |
256 | e6e5906b | pbrook | if (HIGHBIT & (tmp ^ dest) & (tmp ^ src))
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257 | e6e5906b | pbrook | flags |= CCF_V; |
258 | e6e5906b | pbrook | break;
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259 | e1f3808e | pbrook | case CC_OP_SHIFT:
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260 | e1f3808e | pbrook | SET_NZ(dest); |
261 | e1f3808e | pbrook | if (src)
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262 | e6e5906b | pbrook | flags |= CCF_C; |
263 | e6e5906b | pbrook | break;
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264 | e6e5906b | pbrook | default:
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265 | e6e5906b | pbrook | cpu_abort(env, "Bad CC_OP %d", cc_op);
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266 | e6e5906b | pbrook | } |
267 | e6e5906b | pbrook | env->cc_op = CC_OP_FLAGS; |
268 | e6e5906b | pbrook | env->cc_dest = flags; |
269 | e6e5906b | pbrook | } |
270 | e6e5906b | pbrook | |
271 | e1f3808e | pbrook | void HELPER(movec)(CPUM68KState *env, uint32_t reg, uint32_t val)
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272 | 0633879f | pbrook | { |
273 | 0633879f | pbrook | switch (reg) {
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274 | 0633879f | pbrook | case 0x02: /* CACR */ |
275 | 20dcee94 | pbrook | env->cacr = val; |
276 | 20dcee94 | pbrook | m68k_switch_sp(env); |
277 | 20dcee94 | pbrook | break;
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278 | 20dcee94 | pbrook | case 0x04: case 0x05: case 0x06: case 0x07: /* ACR[0-3] */ |
279 | 20dcee94 | pbrook | /* TODO: Implement Access Control Registers. */
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280 | 0633879f | pbrook | break;
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281 | 0633879f | pbrook | case 0x801: /* VBR */ |
282 | 0633879f | pbrook | env->vbr = val; |
283 | 0633879f | pbrook | break;
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284 | 0633879f | pbrook | /* TODO: Implement control registers. */
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285 | 0633879f | pbrook | default:
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286 | 0633879f | pbrook | cpu_abort(env, "Unimplemented control register write 0x%x = 0x%x\n",
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287 | 0633879f | pbrook | reg, val); |
288 | 0633879f | pbrook | } |
289 | 0633879f | pbrook | } |
290 | 0633879f | pbrook | |
291 | e1f3808e | pbrook | void HELPER(set_macsr)(CPUM68KState *env, uint32_t val)
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292 | acf930aa | pbrook | { |
293 | acf930aa | pbrook | uint32_t acc; |
294 | acf930aa | pbrook | int8_t exthigh; |
295 | acf930aa | pbrook | uint8_t extlow; |
296 | acf930aa | pbrook | uint64_t regval; |
297 | acf930aa | pbrook | int i;
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298 | acf930aa | pbrook | if ((env->macsr ^ val) & (MACSR_FI | MACSR_SU)) {
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299 | acf930aa | pbrook | for (i = 0; i < 4; i++) { |
300 | acf930aa | pbrook | regval = env->macc[i]; |
301 | acf930aa | pbrook | exthigh = regval >> 40;
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302 | acf930aa | pbrook | if (env->macsr & MACSR_FI) {
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303 | acf930aa | pbrook | acc = regval >> 8;
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304 | acf930aa | pbrook | extlow = regval; |
305 | acf930aa | pbrook | } else {
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306 | acf930aa | pbrook | acc = regval; |
307 | acf930aa | pbrook | extlow = regval >> 32;
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308 | acf930aa | pbrook | } |
309 | acf930aa | pbrook | if (env->macsr & MACSR_FI) {
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310 | acf930aa | pbrook | regval = (((uint64_t)acc) << 8) | extlow;
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311 | acf930aa | pbrook | regval |= ((int64_t)exthigh) << 40;
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312 | acf930aa | pbrook | } else if (env->macsr & MACSR_SU) { |
313 | acf930aa | pbrook | regval = acc | (((int64_t)extlow) << 32);
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314 | acf930aa | pbrook | regval |= ((int64_t)exthigh) << 40;
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315 | acf930aa | pbrook | } else {
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316 | acf930aa | pbrook | regval = acc | (((uint64_t)extlow) << 32);
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317 | acf930aa | pbrook | regval |= ((uint64_t)(uint8_t)exthigh) << 40;
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318 | acf930aa | pbrook | } |
319 | acf930aa | pbrook | env->macc[i] = regval; |
320 | acf930aa | pbrook | } |
321 | acf930aa | pbrook | } |
322 | acf930aa | pbrook | env->macsr = val; |
323 | acf930aa | pbrook | } |
324 | acf930aa | pbrook | |
325 | 20dcee94 | pbrook | void m68k_switch_sp(CPUM68KState *env)
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326 | 20dcee94 | pbrook | { |
327 | 20dcee94 | pbrook | int new_sp;
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328 | 20dcee94 | pbrook | |
329 | 20dcee94 | pbrook | env->sp[env->current_sp] = env->aregs[7];
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330 | 20dcee94 | pbrook | new_sp = (env->sr & SR_S && env->cacr & M68K_CACR_EUSP) |
331 | 20dcee94 | pbrook | ? M68K_SSP : M68K_USP; |
332 | 20dcee94 | pbrook | env->aregs[7] = env->sp[new_sp];
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333 | 20dcee94 | pbrook | env->current_sp = new_sp; |
334 | 20dcee94 | pbrook | } |
335 | 20dcee94 | pbrook | |
336 | 0633879f | pbrook | /* MMU */
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337 | 0633879f | pbrook | |
338 | 0633879f | pbrook | /* TODO: This will need fixing once the MMU is implemented. */
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339 | 0633879f | pbrook | target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr) |
340 | 0633879f | pbrook | { |
341 | 0633879f | pbrook | return addr;
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342 | 0633879f | pbrook | } |
343 | 0633879f | pbrook | |
344 | 5fafdf24 | ths | #if defined(CONFIG_USER_ONLY)
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345 | 0633879f | pbrook | |
346 | 0633879f | pbrook | int cpu_m68k_handle_mmu_fault (CPUState *env, target_ulong address, int rw, |
347 | 6ebbf390 | j_mayer | int mmu_idx, int is_softmmu) |
348 | 0633879f | pbrook | { |
349 | 0633879f | pbrook | env->exception_index = EXCP_ACCESS; |
350 | 0633879f | pbrook | env->mmu.ar = address; |
351 | 0633879f | pbrook | return 1; |
352 | 0633879f | pbrook | } |
353 | 0633879f | pbrook | |
354 | 0633879f | pbrook | #else
|
355 | 0633879f | pbrook | |
356 | 0633879f | pbrook | int cpu_m68k_handle_mmu_fault (CPUState *env, target_ulong address, int rw, |
357 | 6ebbf390 | j_mayer | int mmu_idx, int is_softmmu) |
358 | 0633879f | pbrook | { |
359 | 0633879f | pbrook | int prot;
|
360 | 0633879f | pbrook | |
361 | 0633879f | pbrook | address &= TARGET_PAGE_MASK; |
362 | 0633879f | pbrook | prot = PAGE_READ | PAGE_WRITE; |
363 | 6ebbf390 | j_mayer | return tlb_set_page(env, address, address, prot, mmu_idx, is_softmmu);
|
364 | 0633879f | pbrook | } |
365 | 0633879f | pbrook | |
366 | 0633879f | pbrook | /* Notify CPU of a pending interrupt. Prioritization and vectoring should
|
367 | 0633879f | pbrook | be handled by the interrupt controller. Real hardware only requests
|
368 | 0633879f | pbrook | the vector when the interrupt is acknowledged by the CPU. For
|
369 | 0633879f | pbrook | simplicitly we calculate it when the interrupt is signalled. */
|
370 | 0633879f | pbrook | void m68k_set_irq_level(CPUM68KState *env, int level, uint8_t vector) |
371 | 0633879f | pbrook | { |
372 | 0633879f | pbrook | env->pending_level = level; |
373 | 0633879f | pbrook | env->pending_vector = vector; |
374 | 0633879f | pbrook | if (level)
|
375 | 0633879f | pbrook | cpu_interrupt(env, CPU_INTERRUPT_HARD); |
376 | 0633879f | pbrook | else
|
377 | 0633879f | pbrook | cpu_reset_interrupt(env, CPU_INTERRUPT_HARD); |
378 | 0633879f | pbrook | } |
379 | 0633879f | pbrook | |
380 | 0633879f | pbrook | #endif
|
381 | e1f3808e | pbrook | |
382 | e1f3808e | pbrook | uint32_t HELPER(bitrev)(uint32_t x) |
383 | e1f3808e | pbrook | { |
384 | e1f3808e | pbrook | x = ((x >> 1) & 0x55555555u) | ((x << 1) & 0xaaaaaaaau); |
385 | e1f3808e | pbrook | x = ((x >> 2) & 0x33333333u) | ((x << 2) & 0xccccccccu); |
386 | e1f3808e | pbrook | x = ((x >> 4) & 0x0f0f0f0fu) | ((x << 4) & 0xf0f0f0f0u); |
387 | e1f3808e | pbrook | return bswap32(x);
|
388 | e1f3808e | pbrook | } |
389 | e1f3808e | pbrook | |
390 | e1f3808e | pbrook | uint32_t HELPER(ff1)(uint32_t x) |
391 | e1f3808e | pbrook | { |
392 | e1f3808e | pbrook | int n;
|
393 | e1f3808e | pbrook | for (n = 32; x; n--) |
394 | e1f3808e | pbrook | x >>= 1;
|
395 | e1f3808e | pbrook | return n;
|
396 | e1f3808e | pbrook | } |
397 | e1f3808e | pbrook | |
398 | e1f3808e | pbrook | uint32_t HELPER(sats)(uint32_t val, uint32_t ccr) |
399 | e1f3808e | pbrook | { |
400 | e1f3808e | pbrook | /* The result has the opposite sign to the original value. */
|
401 | e1f3808e | pbrook | if (ccr & CCF_V)
|
402 | e1f3808e | pbrook | val = (((int32_t)val) >> 31) ^ SIGNBIT;
|
403 | e1f3808e | pbrook | return val;
|
404 | e1f3808e | pbrook | } |
405 | e1f3808e | pbrook | |
406 | e1f3808e | pbrook | uint32_t HELPER(subx_cc)(CPUState *env, uint32_t op1, uint32_t op2) |
407 | e1f3808e | pbrook | { |
408 | e1f3808e | pbrook | uint32_t res; |
409 | e1f3808e | pbrook | uint32_t old_flags; |
410 | e1f3808e | pbrook | |
411 | e1f3808e | pbrook | old_flags = env->cc_dest; |
412 | e1f3808e | pbrook | if (env->cc_x) {
|
413 | e1f3808e | pbrook | env->cc_x = (op1 <= op2); |
414 | e1f3808e | pbrook | env->cc_op = CC_OP_SUBX; |
415 | e1f3808e | pbrook | res = op1 - (op2 + 1);
|
416 | e1f3808e | pbrook | } else {
|
417 | e1f3808e | pbrook | env->cc_x = (op1 < op2); |
418 | e1f3808e | pbrook | env->cc_op = CC_OP_SUB; |
419 | e1f3808e | pbrook | res = op1 - op2; |
420 | e1f3808e | pbrook | } |
421 | e1f3808e | pbrook | env->cc_dest = res; |
422 | e1f3808e | pbrook | env->cc_src = op2; |
423 | e1f3808e | pbrook | cpu_m68k_flush_flags(env, env->cc_op); |
424 | e1f3808e | pbrook | /* !Z is sticky. */
|
425 | e1f3808e | pbrook | env->cc_dest &= (old_flags | ~CCF_Z); |
426 | e1f3808e | pbrook | return res;
|
427 | e1f3808e | pbrook | } |
428 | e1f3808e | pbrook | |
429 | e1f3808e | pbrook | uint32_t HELPER(addx_cc)(CPUState *env, uint32_t op1, uint32_t op2) |
430 | e1f3808e | pbrook | { |
431 | e1f3808e | pbrook | uint32_t res; |
432 | e1f3808e | pbrook | uint32_t old_flags; |
433 | e1f3808e | pbrook | |
434 | e1f3808e | pbrook | old_flags = env->cc_dest; |
435 | e1f3808e | pbrook | if (env->cc_x) {
|
436 | e1f3808e | pbrook | res = op1 + op2 + 1;
|
437 | e1f3808e | pbrook | env->cc_x = (res <= op2); |
438 | e1f3808e | pbrook | env->cc_op = CC_OP_ADDX; |
439 | e1f3808e | pbrook | } else {
|
440 | e1f3808e | pbrook | res = op1 + op2; |
441 | e1f3808e | pbrook | env->cc_x = (res < op2); |
442 | e1f3808e | pbrook | env->cc_op = CC_OP_ADD; |
443 | e1f3808e | pbrook | } |
444 | e1f3808e | pbrook | env->cc_dest = res; |
445 | e1f3808e | pbrook | env->cc_src = op2; |
446 | e1f3808e | pbrook | cpu_m68k_flush_flags(env, env->cc_op); |
447 | e1f3808e | pbrook | /* !Z is sticky. */
|
448 | e1f3808e | pbrook | env->cc_dest &= (old_flags | ~CCF_Z); |
449 | e1f3808e | pbrook | return res;
|
450 | e1f3808e | pbrook | } |
451 | e1f3808e | pbrook | |
452 | e1f3808e | pbrook | uint32_t HELPER(xflag_lt)(uint32_t a, uint32_t b) |
453 | e1f3808e | pbrook | { |
454 | e1f3808e | pbrook | return a < b;
|
455 | e1f3808e | pbrook | } |
456 | e1f3808e | pbrook | |
457 | e1f3808e | pbrook | uint32_t HELPER(btest)(uint32_t x) |
458 | e1f3808e | pbrook | { |
459 | e1f3808e | pbrook | return x != 0; |
460 | e1f3808e | pbrook | } |
461 | e1f3808e | pbrook | |
462 | e1f3808e | pbrook | void HELPER(set_sr)(CPUState *env, uint32_t val)
|
463 | e1f3808e | pbrook | { |
464 | e1f3808e | pbrook | env->sr = val & 0xffff;
|
465 | e1f3808e | pbrook | m68k_switch_sp(env); |
466 | e1f3808e | pbrook | } |
467 | e1f3808e | pbrook | |
468 | e1f3808e | pbrook | uint32_t HELPER(shl_cc)(CPUState *env, uint32_t val, uint32_t shift) |
469 | e1f3808e | pbrook | { |
470 | e1f3808e | pbrook | uint32_t result; |
471 | e1f3808e | pbrook | uint32_t cf; |
472 | e1f3808e | pbrook | |
473 | e1f3808e | pbrook | shift &= 63;
|
474 | e1f3808e | pbrook | if (shift == 0) { |
475 | e1f3808e | pbrook | result = val; |
476 | e1f3808e | pbrook | cf = env->cc_src & CCF_C; |
477 | e1f3808e | pbrook | } else if (shift < 32) { |
478 | e1f3808e | pbrook | result = val << shift; |
479 | e1f3808e | pbrook | cf = (val >> (32 - shift)) & 1; |
480 | e1f3808e | pbrook | } else if (shift == 32) { |
481 | e1f3808e | pbrook | result = 0;
|
482 | e1f3808e | pbrook | cf = val & 1;
|
483 | e1f3808e | pbrook | } else /* shift > 32 */ { |
484 | e1f3808e | pbrook | result = 0;
|
485 | e1f3808e | pbrook | cf = 0;
|
486 | e1f3808e | pbrook | } |
487 | e1f3808e | pbrook | env->cc_src = cf; |
488 | e1f3808e | pbrook | env->cc_x = (cf != 0);
|
489 | e1f3808e | pbrook | env->cc_dest = result; |
490 | e1f3808e | pbrook | return result;
|
491 | e1f3808e | pbrook | } |
492 | e1f3808e | pbrook | |
493 | e1f3808e | pbrook | uint32_t HELPER(shr_cc)(CPUState *env, uint32_t val, uint32_t shift) |
494 | e1f3808e | pbrook | { |
495 | e1f3808e | pbrook | uint32_t result; |
496 | e1f3808e | pbrook | uint32_t cf; |
497 | e1f3808e | pbrook | |
498 | e1f3808e | pbrook | shift &= 63;
|
499 | e1f3808e | pbrook | if (shift == 0) { |
500 | e1f3808e | pbrook | result = val; |
501 | e1f3808e | pbrook | cf = env->cc_src & CCF_C; |
502 | e1f3808e | pbrook | } else if (shift < 32) { |
503 | e1f3808e | pbrook | result = val >> shift; |
504 | e1f3808e | pbrook | cf = (val >> (shift - 1)) & 1; |
505 | e1f3808e | pbrook | } else if (shift == 32) { |
506 | e1f3808e | pbrook | result = 0;
|
507 | e1f3808e | pbrook | cf = val >> 31;
|
508 | e1f3808e | pbrook | } else /* shift > 32 */ { |
509 | e1f3808e | pbrook | result = 0;
|
510 | e1f3808e | pbrook | cf = 0;
|
511 | e1f3808e | pbrook | } |
512 | e1f3808e | pbrook | env->cc_src = cf; |
513 | e1f3808e | pbrook | env->cc_x = (cf != 0);
|
514 | e1f3808e | pbrook | env->cc_dest = result; |
515 | e1f3808e | pbrook | return result;
|
516 | e1f3808e | pbrook | } |
517 | e1f3808e | pbrook | |
518 | e1f3808e | pbrook | uint32_t HELPER(sar_cc)(CPUState *env, uint32_t val, uint32_t shift) |
519 | e1f3808e | pbrook | { |
520 | e1f3808e | pbrook | uint32_t result; |
521 | e1f3808e | pbrook | uint32_t cf; |
522 | e1f3808e | pbrook | |
523 | e1f3808e | pbrook | shift &= 63;
|
524 | e1f3808e | pbrook | if (shift == 0) { |
525 | e1f3808e | pbrook | result = val; |
526 | e1f3808e | pbrook | cf = (env->cc_src & CCF_C) != 0;
|
527 | e1f3808e | pbrook | } else if (shift < 32) { |
528 | e1f3808e | pbrook | result = (int32_t)val >> shift; |
529 | e1f3808e | pbrook | cf = (val >> (shift - 1)) & 1; |
530 | e1f3808e | pbrook | } else /* shift >= 32 */ { |
531 | e1f3808e | pbrook | result = (int32_t)val >> 31;
|
532 | e1f3808e | pbrook | cf = val >> 31;
|
533 | e1f3808e | pbrook | } |
534 | e1f3808e | pbrook | env->cc_src = cf; |
535 | e1f3808e | pbrook | env->cc_x = cf; |
536 | e1f3808e | pbrook | env->cc_dest = result; |
537 | e1f3808e | pbrook | return result;
|
538 | e1f3808e | pbrook | } |
539 | e1f3808e | pbrook | |
540 | e1f3808e | pbrook | /* FPU helpers. */
|
541 | e1f3808e | pbrook | uint32_t HELPER(f64_to_i32)(CPUState *env, float64 val) |
542 | e1f3808e | pbrook | { |
543 | e1f3808e | pbrook | return float64_to_int32(val, &env->fp_status);
|
544 | e1f3808e | pbrook | } |
545 | e1f3808e | pbrook | |
546 | e1f3808e | pbrook | float32 HELPER(f64_to_f32)(CPUState *env, float64 val) |
547 | e1f3808e | pbrook | { |
548 | e1f3808e | pbrook | return float64_to_float32(val, &env->fp_status);
|
549 | e1f3808e | pbrook | } |
550 | e1f3808e | pbrook | |
551 | e1f3808e | pbrook | float64 HELPER(i32_to_f64)(CPUState *env, uint32_t val) |
552 | e1f3808e | pbrook | { |
553 | e1f3808e | pbrook | return int32_to_float64(val, &env->fp_status);
|
554 | e1f3808e | pbrook | } |
555 | e1f3808e | pbrook | |
556 | e1f3808e | pbrook | float64 HELPER(f32_to_f64)(CPUState *env, float32 val) |
557 | e1f3808e | pbrook | { |
558 | e1f3808e | pbrook | return float32_to_float64(val, &env->fp_status);
|
559 | e1f3808e | pbrook | } |
560 | e1f3808e | pbrook | |
561 | e1f3808e | pbrook | float64 HELPER(iround_f64)(CPUState *env, float64 val) |
562 | e1f3808e | pbrook | { |
563 | e1f3808e | pbrook | return float64_round_to_int(val, &env->fp_status);
|
564 | e1f3808e | pbrook | } |
565 | e1f3808e | pbrook | |
566 | e1f3808e | pbrook | float64 HELPER(itrunc_f64)(CPUState *env, float64 val) |
567 | e1f3808e | pbrook | { |
568 | e1f3808e | pbrook | return float64_trunc_to_int(val, &env->fp_status);
|
569 | e1f3808e | pbrook | } |
570 | e1f3808e | pbrook | |
571 | e1f3808e | pbrook | float64 HELPER(sqrt_f64)(CPUState *env, float64 val) |
572 | e1f3808e | pbrook | { |
573 | e1f3808e | pbrook | return float64_sqrt(val, &env->fp_status);
|
574 | e1f3808e | pbrook | } |
575 | e1f3808e | pbrook | |
576 | e1f3808e | pbrook | float64 HELPER(abs_f64)(float64 val) |
577 | e1f3808e | pbrook | { |
578 | e1f3808e | pbrook | return float64_abs(val);
|
579 | e1f3808e | pbrook | } |
580 | e1f3808e | pbrook | |
581 | e1f3808e | pbrook | float64 HELPER(chs_f64)(float64 val) |
582 | e1f3808e | pbrook | { |
583 | e1f3808e | pbrook | return float64_chs(val);
|
584 | e1f3808e | pbrook | } |
585 | e1f3808e | pbrook | |
586 | e1f3808e | pbrook | float64 HELPER(add_f64)(CPUState *env, float64 a, float64 b) |
587 | e1f3808e | pbrook | { |
588 | e1f3808e | pbrook | return float64_add(a, b, &env->fp_status);
|
589 | e1f3808e | pbrook | } |
590 | e1f3808e | pbrook | |
591 | e1f3808e | pbrook | float64 HELPER(sub_f64)(CPUState *env, float64 a, float64 b) |
592 | e1f3808e | pbrook | { |
593 | e1f3808e | pbrook | return float64_sub(a, b, &env->fp_status);
|
594 | e1f3808e | pbrook | } |
595 | e1f3808e | pbrook | |
596 | e1f3808e | pbrook | float64 HELPER(mul_f64)(CPUState *env, float64 a, float64 b) |
597 | e1f3808e | pbrook | { |
598 | e1f3808e | pbrook | return float64_mul(a, b, &env->fp_status);
|
599 | e1f3808e | pbrook | } |
600 | e1f3808e | pbrook | |
601 | e1f3808e | pbrook | float64 HELPER(div_f64)(CPUState *env, float64 a, float64 b) |
602 | e1f3808e | pbrook | { |
603 | e1f3808e | pbrook | return float64_div(a, b, &env->fp_status);
|
604 | e1f3808e | pbrook | } |
605 | e1f3808e | pbrook | |
606 | e1f3808e | pbrook | float64 HELPER(sub_cmp_f64)(CPUState *env, float64 a, float64 b) |
607 | e1f3808e | pbrook | { |
608 | e1f3808e | pbrook | /* ??? This may incorrectly raise exceptions. */
|
609 | e1f3808e | pbrook | /* ??? Should flush denormals to zero. */
|
610 | e1f3808e | pbrook | float64 res; |
611 | e1f3808e | pbrook | res = float64_sub(a, b, &env->fp_status); |
612 | e1f3808e | pbrook | if (float64_is_nan(res)) {
|
613 | e1f3808e | pbrook | /* +/-inf compares equal against itself, but sub returns nan. */
|
614 | e1f3808e | pbrook | if (!float64_is_nan(a)
|
615 | e1f3808e | pbrook | && !float64_is_nan(b)) { |
616 | e1f3808e | pbrook | res = float64_zero; |
617 | e1f3808e | pbrook | if (float64_lt_quiet(a, res, &env->fp_status))
|
618 | e1f3808e | pbrook | res = float64_chs(res); |
619 | e1f3808e | pbrook | } |
620 | e1f3808e | pbrook | } |
621 | e1f3808e | pbrook | return res;
|
622 | e1f3808e | pbrook | } |
623 | e1f3808e | pbrook | |
624 | e1f3808e | pbrook | uint32_t HELPER(compare_f64)(CPUState *env, float64 val) |
625 | e1f3808e | pbrook | { |
626 | e1f3808e | pbrook | return float64_compare_quiet(val, float64_zero, &env->fp_status);
|
627 | e1f3808e | pbrook | } |
628 | e1f3808e | pbrook | |
629 | e1f3808e | pbrook | /* MAC unit. */
|
630 | e1f3808e | pbrook | /* FIXME: The MAC unit implementation is a bit of a mess. Some helpers
|
631 | e1f3808e | pbrook | take values, others take register numbers and manipulate the contents
|
632 | e1f3808e | pbrook | in-place. */
|
633 | e1f3808e | pbrook | void HELPER(mac_move)(CPUState *env, uint32_t dest, uint32_t src)
|
634 | e1f3808e | pbrook | { |
635 | e1f3808e | pbrook | uint32_t mask; |
636 | e1f3808e | pbrook | env->macc[dest] = env->macc[src]; |
637 | e1f3808e | pbrook | mask = MACSR_PAV0 << dest; |
638 | e1f3808e | pbrook | if (env->macsr & (MACSR_PAV0 << src))
|
639 | e1f3808e | pbrook | env->macsr |= mask; |
640 | e1f3808e | pbrook | else
|
641 | e1f3808e | pbrook | env->macsr &= ~mask; |
642 | e1f3808e | pbrook | } |
643 | e1f3808e | pbrook | |
644 | e1f3808e | pbrook | uint64_t HELPER(macmuls)(CPUState *env, uint32_t op1, uint32_t op2) |
645 | e1f3808e | pbrook | { |
646 | e1f3808e | pbrook | int64_t product; |
647 | e1f3808e | pbrook | int64_t res; |
648 | e1f3808e | pbrook | |
649 | e1f3808e | pbrook | product = (uint64_t)op1 * op2; |
650 | e1f3808e | pbrook | res = (product << 24) >> 24; |
651 | e1f3808e | pbrook | if (res != product) {
|
652 | e1f3808e | pbrook | env->macsr |= MACSR_V; |
653 | e1f3808e | pbrook | if (env->macsr & MACSR_OMC) {
|
654 | e1f3808e | pbrook | /* Make sure the accumulate operation overflows. */
|
655 | e1f3808e | pbrook | if (product < 0) |
656 | e1f3808e | pbrook | res = ~(1ll << 50); |
657 | e1f3808e | pbrook | else
|
658 | e1f3808e | pbrook | res = 1ll << 50; |
659 | e1f3808e | pbrook | } |
660 | e1f3808e | pbrook | } |
661 | e1f3808e | pbrook | return res;
|
662 | e1f3808e | pbrook | } |
663 | e1f3808e | pbrook | |
664 | e1f3808e | pbrook | uint64_t HELPER(macmulu)(CPUState *env, uint32_t op1, uint32_t op2) |
665 | e1f3808e | pbrook | { |
666 | e1f3808e | pbrook | uint64_t product; |
667 | e1f3808e | pbrook | |
668 | e1f3808e | pbrook | product = (uint64_t)op1 * op2; |
669 | e1f3808e | pbrook | if (product & (0xffffffull << 40)) { |
670 | e1f3808e | pbrook | env->macsr |= MACSR_V; |
671 | e1f3808e | pbrook | if (env->macsr & MACSR_OMC) {
|
672 | e1f3808e | pbrook | /* Make sure the accumulate operation overflows. */
|
673 | e1f3808e | pbrook | product = 1ll << 50; |
674 | e1f3808e | pbrook | } else {
|
675 | e1f3808e | pbrook | product &= ((1ull << 40) - 1); |
676 | e1f3808e | pbrook | } |
677 | e1f3808e | pbrook | } |
678 | e1f3808e | pbrook | return product;
|
679 | e1f3808e | pbrook | } |
680 | e1f3808e | pbrook | |
681 | e1f3808e | pbrook | uint64_t HELPER(macmulf)(CPUState *env, uint32_t op1, uint32_t op2) |
682 | e1f3808e | pbrook | { |
683 | e1f3808e | pbrook | uint64_t product; |
684 | e1f3808e | pbrook | uint32_t remainder; |
685 | e1f3808e | pbrook | |
686 | e1f3808e | pbrook | product = (uint64_t)op1 * op2; |
687 | e1f3808e | pbrook | if (env->macsr & MACSR_RT) {
|
688 | e1f3808e | pbrook | remainder = product & 0xffffff;
|
689 | e1f3808e | pbrook | product >>= 24;
|
690 | e1f3808e | pbrook | if (remainder > 0x800000) |
691 | e1f3808e | pbrook | product++; |
692 | e1f3808e | pbrook | else if (remainder == 0x800000) |
693 | e1f3808e | pbrook | product += (product & 1);
|
694 | e1f3808e | pbrook | } else {
|
695 | e1f3808e | pbrook | product >>= 24;
|
696 | e1f3808e | pbrook | } |
697 | e1f3808e | pbrook | return product;
|
698 | e1f3808e | pbrook | } |
699 | e1f3808e | pbrook | |
700 | e1f3808e | pbrook | void HELPER(macsats)(CPUState *env, uint32_t acc)
|
701 | e1f3808e | pbrook | { |
702 | e1f3808e | pbrook | int64_t tmp; |
703 | e1f3808e | pbrook | int64_t result; |
704 | e1f3808e | pbrook | tmp = env->macc[acc]; |
705 | e1f3808e | pbrook | result = ((tmp << 16) >> 16); |
706 | e1f3808e | pbrook | if (result != tmp) {
|
707 | e1f3808e | pbrook | env->macsr |= MACSR_V; |
708 | e1f3808e | pbrook | } |
709 | e1f3808e | pbrook | if (env->macsr & MACSR_V) {
|
710 | e1f3808e | pbrook | env->macsr |= MACSR_PAV0 << acc; |
711 | e1f3808e | pbrook | if (env->macsr & MACSR_OMC) {
|
712 | e1f3808e | pbrook | /* The result is saturated to 32 bits, despite overflow occuring
|
713 | e1f3808e | pbrook | at 48 bits. Seems weird, but that's what the hardware docs
|
714 | e1f3808e | pbrook | say. */
|
715 | e1f3808e | pbrook | result = (result >> 63) ^ 0x7fffffff; |
716 | e1f3808e | pbrook | } |
717 | e1f3808e | pbrook | } |
718 | e1f3808e | pbrook | env->macc[acc] = result; |
719 | e1f3808e | pbrook | } |
720 | e1f3808e | pbrook | |
721 | e1f3808e | pbrook | void HELPER(macsatu)(CPUState *env, uint32_t acc)
|
722 | e1f3808e | pbrook | { |
723 | e1f3808e | pbrook | uint64_t val; |
724 | e1f3808e | pbrook | |
725 | e1f3808e | pbrook | val = env->macc[acc]; |
726 | e1f3808e | pbrook | if (val & (0xffffull << 48)) { |
727 | e1f3808e | pbrook | env->macsr |= MACSR_V; |
728 | e1f3808e | pbrook | } |
729 | e1f3808e | pbrook | if (env->macsr & MACSR_V) {
|
730 | e1f3808e | pbrook | env->macsr |= MACSR_PAV0 << acc; |
731 | e1f3808e | pbrook | if (env->macsr & MACSR_OMC) {
|
732 | e1f3808e | pbrook | if (val > (1ull << 53)) |
733 | e1f3808e | pbrook | val = 0;
|
734 | e1f3808e | pbrook | else
|
735 | e1f3808e | pbrook | val = (1ull << 48) - 1; |
736 | e1f3808e | pbrook | } else {
|
737 | e1f3808e | pbrook | val &= ((1ull << 48) - 1); |
738 | e1f3808e | pbrook | } |
739 | e1f3808e | pbrook | } |
740 | e1f3808e | pbrook | env->macc[acc] = val; |
741 | e1f3808e | pbrook | } |
742 | e1f3808e | pbrook | |
743 | e1f3808e | pbrook | void HELPER(macsatf)(CPUState *env, uint32_t acc)
|
744 | e1f3808e | pbrook | { |
745 | e1f3808e | pbrook | int64_t sum; |
746 | e1f3808e | pbrook | int64_t result; |
747 | e1f3808e | pbrook | |
748 | e1f3808e | pbrook | sum = env->macc[acc]; |
749 | e1f3808e | pbrook | result = (sum << 16) >> 16; |
750 | e1f3808e | pbrook | if (result != sum) {
|
751 | e1f3808e | pbrook | env->macsr |= MACSR_V; |
752 | e1f3808e | pbrook | } |
753 | e1f3808e | pbrook | if (env->macsr & MACSR_V) {
|
754 | e1f3808e | pbrook | env->macsr |= MACSR_PAV0 << acc; |
755 | e1f3808e | pbrook | if (env->macsr & MACSR_OMC) {
|
756 | e1f3808e | pbrook | result = (result >> 63) ^ 0x7fffffffffffll; |
757 | e1f3808e | pbrook | } |
758 | e1f3808e | pbrook | } |
759 | e1f3808e | pbrook | env->macc[acc] = result; |
760 | e1f3808e | pbrook | } |
761 | e1f3808e | pbrook | |
762 | e1f3808e | pbrook | void HELPER(mac_set_flags)(CPUState *env, uint32_t acc)
|
763 | e1f3808e | pbrook | { |
764 | e1f3808e | pbrook | uint64_t val; |
765 | e1f3808e | pbrook | val = env->macc[acc]; |
766 | e1f3808e | pbrook | if (val == 0) |
767 | e1f3808e | pbrook | env->macsr |= MACSR_Z; |
768 | e1f3808e | pbrook | else if (val & (1ull << 47)); |
769 | e1f3808e | pbrook | env->macsr |= MACSR_N; |
770 | e1f3808e | pbrook | if (env->macsr & (MACSR_PAV0 << acc)) {
|
771 | e1f3808e | pbrook | env->macsr |= MACSR_V; |
772 | e1f3808e | pbrook | } |
773 | e1f3808e | pbrook | if (env->macsr & MACSR_FI) {
|
774 | e1f3808e | pbrook | val = ((int64_t)val) >> 40;
|
775 | e1f3808e | pbrook | if (val != 0 && val != -1) |
776 | e1f3808e | pbrook | env->macsr |= MACSR_EV; |
777 | e1f3808e | pbrook | } else if (env->macsr & MACSR_SU) { |
778 | e1f3808e | pbrook | val = ((int64_t)val) >> 32;
|
779 | e1f3808e | pbrook | if (val != 0 && val != -1) |
780 | e1f3808e | pbrook | env->macsr |= MACSR_EV; |
781 | e1f3808e | pbrook | } else {
|
782 | e1f3808e | pbrook | if ((val >> 32) != 0) |
783 | e1f3808e | pbrook | env->macsr |= MACSR_EV; |
784 | e1f3808e | pbrook | } |
785 | e1f3808e | pbrook | } |
786 | e1f3808e | pbrook | |
787 | e1f3808e | pbrook | void HELPER(flush_flags)(CPUState *env, uint32_t cc_op)
|
788 | e1f3808e | pbrook | { |
789 | e1f3808e | pbrook | cpu_m68k_flush_flags(env, cc_op); |
790 | e1f3808e | pbrook | } |
791 | e1f3808e | pbrook | |
792 | e1f3808e | pbrook | uint32_t HELPER(get_macf)(CPUState *env, uint64_t val) |
793 | e1f3808e | pbrook | { |
794 | e1f3808e | pbrook | int rem;
|
795 | e1f3808e | pbrook | uint32_t result; |
796 | e1f3808e | pbrook | |
797 | e1f3808e | pbrook | if (env->macsr & MACSR_SU) {
|
798 | e1f3808e | pbrook | /* 16-bit rounding. */
|
799 | e1f3808e | pbrook | rem = val & 0xffffff;
|
800 | e1f3808e | pbrook | val = (val >> 24) & 0xffffu; |
801 | e1f3808e | pbrook | if (rem > 0x800000) |
802 | e1f3808e | pbrook | val++; |
803 | e1f3808e | pbrook | else if (rem == 0x800000) |
804 | e1f3808e | pbrook | val += (val & 1);
|
805 | e1f3808e | pbrook | } else if (env->macsr & MACSR_RT) { |
806 | e1f3808e | pbrook | /* 32-bit rounding. */
|
807 | e1f3808e | pbrook | rem = val & 0xff;
|
808 | e1f3808e | pbrook | val >>= 8;
|
809 | e1f3808e | pbrook | if (rem > 0x80) |
810 | e1f3808e | pbrook | val++; |
811 | e1f3808e | pbrook | else if (rem == 0x80) |
812 | e1f3808e | pbrook | val += (val & 1);
|
813 | e1f3808e | pbrook | } else {
|
814 | e1f3808e | pbrook | /* No rounding. */
|
815 | e1f3808e | pbrook | val >>= 8;
|
816 | e1f3808e | pbrook | } |
817 | e1f3808e | pbrook | if (env->macsr & MACSR_OMC) {
|
818 | e1f3808e | pbrook | /* Saturate. */
|
819 | e1f3808e | pbrook | if (env->macsr & MACSR_SU) {
|
820 | e1f3808e | pbrook | if (val != (uint16_t) val) {
|
821 | e1f3808e | pbrook | result = ((val >> 63) ^ 0x7fff) & 0xffff; |
822 | e1f3808e | pbrook | } else {
|
823 | e1f3808e | pbrook | result = val & 0xffff;
|
824 | e1f3808e | pbrook | } |
825 | e1f3808e | pbrook | } else {
|
826 | e1f3808e | pbrook | if (val != (uint32_t)val) {
|
827 | e1f3808e | pbrook | result = ((uint32_t)(val >> 63) & 0x7fffffff); |
828 | e1f3808e | pbrook | } else {
|
829 | e1f3808e | pbrook | result = (uint32_t)val; |
830 | e1f3808e | pbrook | } |
831 | e1f3808e | pbrook | } |
832 | e1f3808e | pbrook | } else {
|
833 | e1f3808e | pbrook | /* No saturation. */
|
834 | e1f3808e | pbrook | if (env->macsr & MACSR_SU) {
|
835 | e1f3808e | pbrook | result = val & 0xffff;
|
836 | e1f3808e | pbrook | } else {
|
837 | e1f3808e | pbrook | result = (uint32_t)val; |
838 | e1f3808e | pbrook | } |
839 | e1f3808e | pbrook | } |
840 | e1f3808e | pbrook | return result;
|
841 | e1f3808e | pbrook | } |
842 | e1f3808e | pbrook | |
843 | e1f3808e | pbrook | uint32_t HELPER(get_macs)(uint64_t val) |
844 | e1f3808e | pbrook | { |
845 | e1f3808e | pbrook | if (val == (int32_t)val) {
|
846 | e1f3808e | pbrook | return (int32_t)val;
|
847 | e1f3808e | pbrook | } else {
|
848 | e1f3808e | pbrook | return (val >> 61) ^ ~SIGNBIT; |
849 | e1f3808e | pbrook | } |
850 | e1f3808e | pbrook | } |
851 | e1f3808e | pbrook | |
852 | e1f3808e | pbrook | uint32_t HELPER(get_macu)(uint64_t val) |
853 | e1f3808e | pbrook | { |
854 | e1f3808e | pbrook | if ((val >> 32) == 0) { |
855 | e1f3808e | pbrook | return (uint32_t)val;
|
856 | e1f3808e | pbrook | } else {
|
857 | e1f3808e | pbrook | return 0xffffffffu; |
858 | e1f3808e | pbrook | } |
859 | e1f3808e | pbrook | } |
860 | e1f3808e | pbrook | |
861 | e1f3808e | pbrook | uint32_t HELPER(get_mac_extf)(CPUState *env, uint32_t acc) |
862 | e1f3808e | pbrook | { |
863 | e1f3808e | pbrook | uint32_t val; |
864 | e1f3808e | pbrook | val = env->macc[acc] & 0x00ff;
|
865 | e1f3808e | pbrook | val = (env->macc[acc] >> 32) & 0xff00; |
866 | e1f3808e | pbrook | val |= (env->macc[acc + 1] << 16) & 0x00ff0000; |
867 | e1f3808e | pbrook | val |= (env->macc[acc + 1] >> 16) & 0xff000000; |
868 | e1f3808e | pbrook | return val;
|
869 | e1f3808e | pbrook | } |
870 | e1f3808e | pbrook | |
871 | e1f3808e | pbrook | uint32_t HELPER(get_mac_exti)(CPUState *env, uint32_t acc) |
872 | e1f3808e | pbrook | { |
873 | e1f3808e | pbrook | uint32_t val; |
874 | e1f3808e | pbrook | val = (env->macc[acc] >> 32) & 0xffff; |
875 | e1f3808e | pbrook | val |= (env->macc[acc + 1] >> 16) & 0xffff0000; |
876 | e1f3808e | pbrook | return val;
|
877 | e1f3808e | pbrook | } |
878 | e1f3808e | pbrook | |
879 | e1f3808e | pbrook | void HELPER(set_mac_extf)(CPUState *env, uint32_t val, uint32_t acc)
|
880 | e1f3808e | pbrook | { |
881 | e1f3808e | pbrook | int64_t res; |
882 | e1f3808e | pbrook | int32_t tmp; |
883 | e1f3808e | pbrook | res = env->macc[acc] & 0xffffffff00ull;
|
884 | e1f3808e | pbrook | tmp = (int16_t)(val & 0xff00);
|
885 | e1f3808e | pbrook | res |= ((int64_t)tmp) << 32;
|
886 | e1f3808e | pbrook | res |= val & 0xff;
|
887 | e1f3808e | pbrook | env->macc[acc] = res; |
888 | e1f3808e | pbrook | res = env->macc[acc + 1] & 0xffffffff00ull; |
889 | e1f3808e | pbrook | tmp = (val & 0xff000000);
|
890 | e1f3808e | pbrook | res |= ((int64_t)tmp) << 16;
|
891 | e1f3808e | pbrook | res |= (val >> 16) & 0xff; |
892 | e1f3808e | pbrook | env->macc[acc + 1] = res;
|
893 | e1f3808e | pbrook | } |
894 | e1f3808e | pbrook | |
895 | e1f3808e | pbrook | void HELPER(set_mac_exts)(CPUState *env, uint32_t val, uint32_t acc)
|
896 | e1f3808e | pbrook | { |
897 | e1f3808e | pbrook | int64_t res; |
898 | e1f3808e | pbrook | int32_t tmp; |
899 | e1f3808e | pbrook | res = (uint32_t)env->macc[acc]; |
900 | e1f3808e | pbrook | tmp = (int16_t)val; |
901 | e1f3808e | pbrook | res |= ((int64_t)tmp) << 32;
|
902 | e1f3808e | pbrook | env->macc[acc] = res; |
903 | e1f3808e | pbrook | res = (uint32_t)env->macc[acc + 1];
|
904 | e1f3808e | pbrook | tmp = val & 0xffff0000;
|
905 | e1f3808e | pbrook | res |= (int64_t)tmp << 16;
|
906 | e1f3808e | pbrook | env->macc[acc + 1] = res;
|
907 | e1f3808e | pbrook | } |
908 | e1f3808e | pbrook | |
909 | e1f3808e | pbrook | void HELPER(set_mac_extu)(CPUState *env, uint32_t val, uint32_t acc)
|
910 | e1f3808e | pbrook | { |
911 | e1f3808e | pbrook | uint64_t res; |
912 | e1f3808e | pbrook | res = (uint32_t)env->macc[acc]; |
913 | e1f3808e | pbrook | res |= ((uint64_t)(val & 0xffff)) << 32; |
914 | e1f3808e | pbrook | env->macc[acc] = res; |
915 | e1f3808e | pbrook | res = (uint32_t)env->macc[acc + 1];
|
916 | e1f3808e | pbrook | res |= (uint64_t)(val & 0xffff0000) << 16; |
917 | e1f3808e | pbrook | env->macc[acc + 1] = res;
|
918 | e1f3808e | pbrook | } |