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author | fishsoupisgood <github@madingley.org> | 2019-04-29 01:17:54 +0100 |
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committer | fishsoupisgood <github@madingley.org> | 2019-05-27 03:43:43 +0100 |
commit | 3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch) | |
tree | 65ca85f13617aee1dce474596800950f266a456c /tcg/tcg-be-ldst.h | |
download | qemu-master.tar.gz qemu-master.tar.bz2 qemu-master.zip |
Diffstat (limited to 'tcg/tcg-be-ldst.h')
-rw-r--r-- | tcg/tcg-be-ldst.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/tcg/tcg-be-ldst.h b/tcg/tcg-be-ldst.h new file mode 100644 index 00000000..40a2369b --- /dev/null +++ b/tcg/tcg-be-ldst.h @@ -0,0 +1,88 @@ +/* + * TCG Backend Data: load-store optimization only. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#ifdef CONFIG_SOFTMMU + +typedef struct TCGLabelQemuLdst { + bool is_ld; /* qemu_ld: true, qemu_st: false */ + TCGMemOpIdx oi; + TCGType type; /* result type of a load */ + TCGReg addrlo_reg; /* reg index for low word of guest virtual addr */ + TCGReg addrhi_reg; /* reg index for high word of guest virtual addr */ + TCGReg datalo_reg; /* reg index for low word to be loaded or stored */ + TCGReg datahi_reg; /* reg index for high word to be loaded or stored */ + tcg_insn_unit *raddr; /* gen code addr of the next IR of qemu_ld/st IR */ + tcg_insn_unit *label_ptr[2]; /* label pointers to be updated */ + struct TCGLabelQemuLdst *next; +} TCGLabelQemuLdst; + +typedef struct TCGBackendData { + TCGLabelQemuLdst *labels; +} TCGBackendData; + + +/* + * Initialize TB backend data at the beginning of the TB. + */ + +static inline void tcg_out_tb_init(TCGContext *s) +{ + s->be->labels = NULL; +} + +/* + * Generate TB finalization at the end of block + */ + +static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l); +static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l); + +static void tcg_out_tb_finalize(TCGContext *s) +{ + TCGLabelQemuLdst *lb; + + /* qemu_ld/st slow paths */ + for (lb = s->be->labels; lb != NULL; lb = lb->next) { + if (lb->is_ld) { + tcg_out_qemu_ld_slow_path(s, lb); + } else { + tcg_out_qemu_st_slow_path(s, lb); + } + } +} + +/* + * Allocate a new TCGLabelQemuLdst entry. + */ + +static inline TCGLabelQemuLdst *new_ldst_label(TCGContext *s) +{ + TCGBackendData *be = s->be; + TCGLabelQemuLdst *l = tcg_malloc(sizeof(*l)); + + l->next = be->labels; + be->labels = l; + return l; +} +#else +#include "tcg-be-null.h" +#endif /* CONFIG_SOFTMMU */ |