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GeezerVison is showing github.com — cpython/Python/wordcode_helpers.h at 3.6 · python/cpython Expand file tree/ Copy pathwordcode_helpers.hMore file actions 44 lines (41 loc) · 1.24 KB / Copy pathwordcode_helpers.hFile metadata and controls44 lines (41 loc) · 1.24 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 /* This file contains code shared by the compiler and the peephole optimizer. */ #ifdef WORDS_BIGENDIAN # define PACKOPARG(opcode, oparg) ((_Py_CODEUNIT)(((opcode) << 8) | (oparg))) #else # define PACKOPARG(opcode, oparg) ((_Py_CODEUNIT)(((oparg) << 8) | (opcode))) #endif /* Minimum number of code units necessary to encode instruction with EXTENDED_ARGs */ static int instrsize(unsigned int oparg) { return oparg <= 0xff ? 1 : oparg <= 0xffff ? 2 : oparg <= 0xffffff ? 3 : 4; } /* Spits out op/oparg pair using ilen bytes. codestr should be pointed at the desired location of the first EXTENDED_ARG */ static void write_op_arg(_Py_CODEUNIT *codestr, unsigned char opcode, unsigned int oparg, int ilen) { switch (ilen) { case 4: *codestr++ = PACKOPARG(EXTENDED_ARG, (oparg >> 24) & 0xff); /* fall through */ case 3: *codestr++ = PACKOPARG(EXTENDED_ARG, (oparg >> 16) & 0xff); /* fall through */ case 2: *codestr++ = PACKOPARG(EXTENDED_ARG, (oparg >> 8) & 0xff); /* fall through */ case 1: *codestr++ = PACKOPARG(opcode, oparg & 0xff); break; default: assert(0); } } |
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