| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Floating-point, VMX/Altivec and VSX loads and stores |
| 3 | * for use in instruction emulation. |
| 4 | * |
| 5 | * Copyright 2010 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU General Public License |
| 9 | * as published by the Free Software Foundation; either version |
| 10 | * 2 of the License, or (at your option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #include <asm/processor.h> |
| 14 | #include <asm/ppc_asm.h> |
| 15 | #include <asm/ppc-opcode.h> |
| 16 | #include <asm/reg.h> |
| 17 | #include <asm/asm-offsets.h> |
| 18 | #include <asm/asm-compat.h> |
| 19 | #include <linux/errno.h> |
| 20 | |
| 21 | #ifdef CONFIG_PPC_FPU |
| 22 | |
| 23 | #define STKFRM (PPC_MIN_STKFRM + 16) |
| 24 | |
| 25 | /* Get the contents of frN into *p; N is in r3 and p is in r4. */ |
| 26 | _GLOBAL(get_fpr) |
| 27 | mflr r0 |
| 28 | mfmsr r6 |
| 29 | ori r7, r6, MSR_FP |
| 30 | MTMSRD(r7) |
| 31 | isync |
| 32 | rlwinm r3,r3,3,0xf8 |
| 33 | bcl 20,31,1f |
| 34 | reg = 0 |
| 35 | .rept 32 |
| 36 | stfd reg, 0(r4) |
| 37 | b 2f |
| 38 | reg = reg + 1 |
| 39 | .endr |
| 40 | 1: mflr r5 |
| 41 | add r5,r3,r5 |
| 42 | mtctr r5 |
| 43 | mtlr r0 |
| 44 | bctr |
| 45 | 2: MTMSRD(r6) |
| 46 | isync |
| 47 | blr |
| 48 | |
| 49 | /* Put the contents of *p into frN; N is in r3 and p is in r4. */ |
| 50 | _GLOBAL(put_fpr) |
| 51 | mflr r0 |
| 52 | mfmsr r6 |
| 53 | ori r7, r6, MSR_FP |
| 54 | MTMSRD(r7) |
| 55 | isync |
| 56 | rlwinm r3,r3,3,0xf8 |
| 57 | bcl 20,31,1f |
| 58 | reg = 0 |
| 59 | .rept 32 |
| 60 | lfd reg, 0(r4) |
| 61 | b 2f |
| 62 | reg = reg + 1 |
| 63 | .endr |
| 64 | 1: mflr r5 |
| 65 | add r5,r3,r5 |
| 66 | mtctr r5 |
| 67 | mtlr r0 |
| 68 | bctr |
| 69 | 2: MTMSRD(r6) |
| 70 | isync |
| 71 | blr |
| 72 | |
| 73 | #ifdef CONFIG_ALTIVEC |
| 74 | /* Get the contents of vrN into *p; N is in r3 and p is in r4. */ |
| 75 | _GLOBAL(get_vr) |
| 76 | mflr r0 |
| 77 | mfmsr r6 |
| 78 | oris r7, r6, MSR_VEC@h |
| 79 | MTMSRD(r7) |
| 80 | isync |
| 81 | rlwinm r3,r3,3,0xf8 |
| 82 | bcl 20,31,1f |
| 83 | reg = 0 |
| 84 | .rept 32 |
| 85 | stvx reg, 0, r4 |
| 86 | b 2f |
| 87 | reg = reg + 1 |
| 88 | .endr |
| 89 | 1: mflr r5 |
| 90 | add r5,r3,r5 |
| 91 | mtctr r5 |
| 92 | mtlr r0 |
| 93 | bctr |
| 94 | 2: MTMSRD(r6) |
| 95 | isync |
| 96 | blr |
| 97 | |
| 98 | /* Put the contents of *p into vrN; N is in r3 and p is in r4. */ |
| 99 | _GLOBAL(put_vr) |
| 100 | mflr r0 |
| 101 | mfmsr r6 |
| 102 | oris r7, r6, MSR_VEC@h |
| 103 | MTMSRD(r7) |
| 104 | isync |
| 105 | rlwinm r3,r3,3,0xf8 |
| 106 | bcl 20,31,1f |
| 107 | reg = 0 |
| 108 | .rept 32 |
| 109 | lvx reg, 0, r4 |
| 110 | b 2f |
| 111 | reg = reg + 1 |
| 112 | .endr |
| 113 | 1: mflr r5 |
| 114 | add r5,r3,r5 |
| 115 | mtctr r5 |
| 116 | mtlr r0 |
| 117 | bctr |
| 118 | 2: MTMSRD(r6) |
| 119 | isync |
| 120 | blr |
| 121 | #endif /* CONFIG_ALTIVEC */ |
| 122 | |
| 123 | #ifdef CONFIG_VSX |
| 124 | /* Get the contents of vsN into vs0; N is in r3. */ |
| 125 | _GLOBAL(get_vsr) |
| 126 | mflr r0 |
| 127 | rlwinm r3,r3,3,0x1f8 |
| 128 | bcl 20,31,1f |
| 129 | blr /* vs0 is already in vs0 */ |
| 130 | nop |
| 131 | reg = 1 |
| 132 | .rept 63 |
| 133 | XXLOR(0,reg,reg) |
| 134 | blr |
| 135 | reg = reg + 1 |
| 136 | .endr |
| 137 | 1: mflr r5 |
| 138 | add r5,r3,r5 |
| 139 | mtctr r5 |
| 140 | mtlr r0 |
| 141 | bctr |
| 142 | |
| 143 | /* Put the contents of vs0 into vsN; N is in r3. */ |
| 144 | _GLOBAL(put_vsr) |
| 145 | mflr r0 |
| 146 | rlwinm r3,r3,3,0x1f8 |
| 147 | bcl 20,31,1f |
| 148 | blr /* v0 is already in v0 */ |
| 149 | nop |
| 150 | reg = 1 |
| 151 | .rept 63 |
| 152 | XXLOR(reg,0,0) |
| 153 | blr |
| 154 | reg = reg + 1 |
| 155 | .endr |
| 156 | 1: mflr r5 |
| 157 | add r5,r3,r5 |
| 158 | mtctr r5 |
| 159 | mtlr r0 |
| 160 | bctr |
| 161 | |
| 162 | /* Load VSX reg N from vector doubleword *p. N is in r3, p in r4. */ |
| 163 | _GLOBAL(load_vsrn) |
| 164 | PPC_STLU r1,-STKFRM(r1) |
| 165 | mflr r0 |
| 166 | PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1) |
| 167 | mfmsr r6 |
| 168 | oris r7,r6,MSR_VSX@h |
| 169 | cmpwi cr7,r3,0 |
| 170 | li r8,STKFRM-16 |
| 171 | MTMSRD(r7) |
| 172 | isync |
| 173 | beq cr7,1f |
| 174 | STXVD2X(0,R1,R8) |
| 175 | 1: LXVD2X(0,R0,R4) |
| 176 | #ifdef __LITTLE_ENDIAN__ |
| 177 | XXSWAPD(0,0) |
| 178 | #endif |
| 179 | beq cr7,4f |
| 180 | bl put_vsr |
| 181 | LXVD2X(0,R1,R8) |
| 182 | 4: PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1) |
| 183 | mtlr r0 |
| 184 | MTMSRD(r6) |
| 185 | isync |
| 186 | addi r1,r1,STKFRM |
| 187 | blr |
| 188 | |
| 189 | /* Store VSX reg N to vector doubleword *p. N is in r3, p in r4. */ |
| 190 | _GLOBAL(store_vsrn) |
| 191 | PPC_STLU r1,-STKFRM(r1) |
| 192 | mflr r0 |
| 193 | PPC_STL r0,STKFRM+PPC_LR_STKOFF(r1) |
| 194 | mfmsr r6 |
| 195 | oris r7,r6,MSR_VSX@h |
| 196 | li r8,STKFRM-16 |
| 197 | MTMSRD(r7) |
| 198 | isync |
| 199 | STXVD2X(0,R1,R8) |
| 200 | bl get_vsr |
| 201 | #ifdef __LITTLE_ENDIAN__ |
| 202 | XXSWAPD(0,0) |
| 203 | #endif |
| 204 | STXVD2X(0,R0,R4) |
| 205 | LXVD2X(0,R1,R8) |
| 206 | PPC_LL r0,STKFRM+PPC_LR_STKOFF(r1) |
| 207 | mtlr r0 |
| 208 | MTMSRD(r6) |
| 209 | isync |
| 210 | mr r3,r9 |
| 211 | addi r1,r1,STKFRM |
| 212 | blr |
| 213 | #endif /* CONFIG_VSX */ |
| 214 | |
| 215 | /* Convert single-precision to double, without disturbing FPRs. */ |
| 216 | /* conv_sp_to_dp(float *sp, double *dp) */ |
| 217 | _GLOBAL(conv_sp_to_dp) |
| 218 | mfmsr r6 |
| 219 | ori r7, r6, MSR_FP |
| 220 | MTMSRD(r7) |
| 221 | isync |
| 222 | stfd fr0, -16(r1) |
| 223 | lfs fr0, 0(r3) |
| 224 | stfd fr0, 0(r4) |
| 225 | lfd fr0, -16(r1) |
| 226 | MTMSRD(r6) |
| 227 | isync |
| 228 | blr |
| 229 | |
| 230 | /* Convert single-precision to double, without disturbing FPRs. */ |
| 231 | /* conv_sp_to_dp(double *dp, float *sp) */ |
| 232 | _GLOBAL(conv_dp_to_sp) |
| 233 | mfmsr r6 |
| 234 | ori r7, r6, MSR_FP |
| 235 | MTMSRD(r7) |
| 236 | isync |
| 237 | stfd fr0, -16(r1) |
| 238 | lfd fr0, 0(r3) |
| 239 | stfs fr0, 0(r4) |
| 240 | lfd fr0, -16(r1) |
| 241 | MTMSRD(r6) |
| 242 | isync |
| 243 | blr |
| 244 | |
| 245 | #endif /* CONFIG_PPC_FPU */ |