projects / mirror_qemu.git / blame
| Commit | Line | Data |
|---|---|---|
| 9ca03622 ADF |
1 | /* |
| 2 | * Tiny Code Generator for QEMU | |
| 3 | * | |
| 4 | * Copyright (c) 2008 Fabrice Bellard | |
| 5 | * | |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
| 7 | * of this software and associated documentation files (the "Software"), to deal | |
| 8 | * in the Software without restriction, including without limitation the rights | |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| 10 | * copies of the Software, and to permit persons to whom the Software is | |
| 11 | * furnished to do so, subject to the following conditions: | |
| 12 | * | |
| 13 | * The above copyright notice and this permission notice shall be included in | |
| 14 | * all copies or substantial portions of the Software. | |
| 15 | * | |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
| 22 | * THE SOFTWARE. | |
| 23 | */ | |
| 24 | ||
| 25 | #ifndef TCG_COND_H | |
| 26 | #define TCG_COND_H | |
| 27 | ||
| 28 | /* | |
| 29 | * Conditions. Note that these are laid out for easy manipulation by | |
| 30 | * the functions below: | |
| 31 | * bit 0 is used for inverting; | |
| 32 | * bit 1 is signed, | |
| 33 | * bit 2 is unsigned, | |
| 34 | * bit 3 is used with bit 0 for swapping signed/unsigned. | |
| 35 | */ | |
| 36 | typedef enum { | |
| 37 | /* non-signed */ | |
| 38 | TCG_COND_NEVER = 0 | 0 | 0 | 0, | |
| 39 | TCG_COND_ALWAYS = 0 | 0 | 0 | 1, | |
| 40 | TCG_COND_EQ = 8 | 0 | 0 | 0, | |
| 41 | TCG_COND_NE = 8 | 0 | 0 | 1, | |
| 42 | /* signed */ | |
| 43 | TCG_COND_LT = 0 | 0 | 2 | 0, | |
| 44 | TCG_COND_GE = 0 | 0 | 2 | 1, | |
| 45 | TCG_COND_LE = 8 | 0 | 2 | 0, | |
| 46 | TCG_COND_GT = 8 | 0 | 2 | 1, | |
| 47 | /* unsigned */ | |
| 48 | TCG_COND_LTU = 0 | 4 | 0 | 0, | |
| 49 | TCG_COND_GEU = 0 | 4 | 0 | 1, | |
| 50 | TCG_COND_LEU = 8 | 4 | 0 | 0, | |
| 51 | TCG_COND_GTU = 8 | 4 | 0 | 1, | |
| 52 | } TCGCond; | |
| 53 | ||
| 54 | /* Invert the sense of the comparison. */ | |
| 55 | static inline TCGCond tcg_invert_cond(TCGCond c) | |
| 56 | { | |
| 57 | return (TCGCond)(c ^ 1); | |
| 58 | } | |
| 59 | ||
| 60 | /* Swap the operands in a comparison. */ | |
| 61 | static inline TCGCond tcg_swap_cond(TCGCond c) | |
| 62 | { | |
| 63 | return c & 6 ? (TCGCond)(c ^ 9) : c; | |
| 64 | } | |
| 65 | ||
| 66 | /* Create an "unsigned" version of a "signed" comparison. */ | |
| 67 | static inline TCGCond tcg_unsigned_cond(TCGCond c) | |
| 68 | { | |
| 69 | return c & 2 ? (TCGCond)(c ^ 6) : c; | |
| 70 | } | |
| 71 | ||
| 72 | /* Create a "signed" version of an "unsigned" comparison. */ | |
| 73 | static inline TCGCond tcg_signed_cond(TCGCond c) | |
| 74 | { | |
| 75 | return c & 4 ? (TCGCond)(c ^ 6) : c; | |
| 76 | } | |
| 77 | ||
| 78 | /* Must a comparison be considered unsigned? */ | |
| 79 | static inline bool is_unsigned_cond(TCGCond c) | |
| 80 | { | |
| 81 | return (c & 4) != 0; | |
| 82 | } | |
| 83 | ||
| 84 | /* | |
| 85 | * Create a "high" version of a double-word comparison. | |
| 86 | * This removes equality from a LTE or GTE comparison. | |
| 87 | */ | |
| 88 | static inline TCGCond tcg_high_cond(TCGCond c) | |
| 89 | { | |
| 90 | switch (c) { | |
| 91 | case TCG_COND_GE: | |
| 92 | case TCG_COND_LE: | |
| 93 | case TCG_COND_GEU: | |
| 94 | case TCG_COND_LEU: | |
| 95 | return (TCGCond)(c ^ 8); | |
| 96 | default: | |
| 97 | return c; | |
| 98 | } | |
| 99 | } | |
| 100 | ||
| 101 | #endif /* TCG_COND_H */ |