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| 1 : | anton | 1.1 | \ ASSEMBLER, CODE etc. |
| 2 : | |||
| 3 : | anton | 1.23 | \ Copyright (C) 1995,1996,1997,1999,2003,2007,2010 Free Software Foundation, Inc. |
| 4 : | anton | 1.2 | |
| 5 : | \ This file is part of Gforth. | ||
| 6 : | |||
| 7 : | \ Gforth is free software; you can redistribute it and/or | ||
| 8 : | \ modify it under the terms of the GNU General Public License | ||
| 9 : | anton | 1.16 | \ as published by the Free Software Foundation, either version 3 |
| 10 : | anton | 1.2 | \ of the License, or (at your option) any later version. |
| 11 : | |||
| 12 : | \ This program is distributed in the hope that it will be useful, | ||
| 13 : | \ but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 : | \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 15 : | \ GNU General Public License for more details. | ||
| 16 : | |||
| 17 : | \ You should have received a copy of the GNU General Public License | ||
| 18 : | anton | 1.16 | \ along with this program. If not, see http://www.gnu.org/licenses/. |
| 19 : | anton | 1.2 | |
| 20 : | anton | 1.1 | \ does not include the actual assembler (which is machine-dependent), |
| 21 : | \ only words like CODE that are implementation-dependent, but can be | ||
| 22 : | \ defined for all machines. | ||
| 23 : | |||
| 24 : | vocabulary assembler ( -- ) \ tools-ext | ||
| 25 : | anton | 1.21 | \g A vocubulary: Replaces the wordlist at the top of the search order |
| 26 : | \g with the assembler wordlist. | ||
| 27 : | anton | 1.1 | |
| 28 : | crook | 1.9 | : init-asm ( -- ) \ gforth |
| 29 : | anton | 1.21 | \g Pushes the assembler wordlist on the search order. |
| 30 : | anton | 1.1 | also assembler ; |
| 31 : | anton | 1.21 | |
| 32 : | anton | 1.7 | : code ( "name" -- colon-sys ) \ tools-ext |
| 33 : | anton | 1.21 | \G Start a native code definition that runs in the context of the |
| 34 : | \G Gforth virtual machine (engine). Such a definition is not | ||
| 35 : | \G portable between Gforth installations, so we recommend using | ||
| 36 : | \G @code{abi-code} instead of @code{code}. You have to end a | ||
| 37 : | \G @code{code} definition with a dispatch to the next virtual | ||
| 38 : | \G machine instruction. | ||
| 39 : | anton | 1.6 | header |
| 40 : | anton | 1.12 | here >body cfa, |
| 41 : | anton | 1.6 | defstart init-asm ; |
| 42 : | anton | 1.1 | |
| 43 : | dvdkhlng | 1.19 | [ifdef] doabicode: |
| 44 : | anton | 1.22 | : abi-code ( "name" -- colon-sys ) \ gforth abi-code |
| 45 : | dvdkhlng | 1.20 | \G Start a native code definition that is called using the platform's |
| 46 : | \G ABI conventions corresponding to the C-prototype: | ||
| 47 : | \G @example | ||
| 48 : | anton | 1.21 | \G Cell *function(Cell *sp, Float **fpp); |
| 49 : | dvdkhlng | 1.20 | \G @end example |
| 50 : | anton | 1.21 | \G The FP stack pointer is passed in by providing a reference to a |
| 51 : | \G memory location containing the FP stack pointer and is passed | ||
| 52 : | \G out by storing the changed FP stack pointer there (if necessary). | ||
| 53 : | dvdkhlng | 1.18 | header |
| 54 : | doabicode: cfa, | ||
| 55 : | defstart init-asm ; | ||
| 56 : | dvdkhlng | 1.19 | [endif] |
| 57 : | dvdkhlng | 1.18 | |
| 58 : | anton | 1.1 | : (;code) ( -- ) \ gforth |
| 59 : | \ execution semantics of @code{;code} | ||
| 60 : | anton | 1.15 | r> latestxt code-address! ; |
| 61 : | anton | 1.1 | |
| 62 : | anton | 1.6 | :noname ( -- colon-sys ) |
| 63 : | anton | 1.15 | align here latestxt code-address! |
| 64 : | anton | 1.6 | defstart init-asm ; |
| 65 : | pazsan | 1.4 | :noname ( colon-sys1 -- colon-sys2 ) \ tools-ext semicolon-code |
| 66 : | anton | 1.1 | ( create the [;code] part of a low level defining word ) |
| 67 : | anton | 1.13 | ;-hook postpone (;code) basic-block-end finish-code ?struc postpone [ |
| 68 : | anton | 1.3 | defstart init-asm ; |
| 69 : | anton | 1.7 | interpret/compile: ;code ( compilation. colon-sys1 -- colon-sys2 ) \ tools-ext semicolon-code |
| 70 : | anton | 1.21 | \g The code after @code{;code} becomes the behaviour of the last |
| 71 : | \g defined word (which must be a @code{create}d word). The same | ||
| 72 : | anton | 1.22 | \g caveats apply as for @code{code}, so we recommend using |
| 73 : | \g @code{;abi-code} instead. | ||
| 74 : | anton | 1.1 | |
| 75 : | anton | 1.22 | [ifdef] do;abicode: |
| 76 : | : !;abi-code ( addr -- ) | ||
| 77 : | latestxt do;abicode: any-code! ; | ||
| 78 : | |||
| 79 : | : ;abi-code ( -- ) \ gforth semicolon-abi-code | ||
| 80 : | ['] !;abi-code does>-like postpone [ init-asm ; immediate | ||
| 81 : | [then] | ||
| 82 : | |||
| 83 : | anton | 1.1 | : end-code ( colon-sys -- ) \ gforth end_code |
| 84 : | anton | 1.21 | \G End a code definition. Note that you have to assemble the |
| 85 : | \G return from the ABI call (for @code{abi-code}) or the dispatch | ||
| 86 : | \G to the next VM instruction (for @code{code} and @code{;code}) | ||
| 87 : | \G yourself. | ||
| 88 : | anton | 1.15 | latestxt here over - flush-icache |
| 89 : | anton | 1.1 | previous ?struc reveal ; |
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