diff options
Diffstat (limited to 'erts/emulator/beam/erl_bits.c')
| -rw-r--r-- | erts/emulator/beam/erl_bits.c | 145 |
1 files changed, 99 insertions, 46 deletions
diff --git a/erts/emulator/beam/erl_bits.c b/erts/emulator/beam/erl_bits.c index 3753b618e1..73765772c8 100644 --- a/erts/emulator/beam/erl_bits.c +++ b/erts/emulator/beam/erl_bits.c @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 1999-2012. All Rights Reserved. + * Copyright Ericsson AB 1999-2013. All Rights Reserved. * * The contents of this file are subject to the Erlang Public License, * Version 1.1, (the "License"); you may not use this file except in @@ -484,8 +484,16 @@ erts_bs_get_float_2(Process *p, Uint num_bits, unsigned flags, ErlBinMatchBuffer ERTS_FP_ERROR_THOROUGH(p, f32, return THE_NON_VALUE); f.fd = f32; } else { +#ifdef DOUBLE_MIDDLE_ENDIAN + FloatDef ftmp; + ftmp.fd = f64; + f.fw[0] = ftmp.fw[1]; + f.fw[1] = ftmp.fw[0]; + ERTS_FP_ERROR_THOROUGH(p, f.fd, return THE_NON_VALUE); +#else ERTS_FP_ERROR_THOROUGH(p, f64, return THE_NON_VALUE); f.fd = f64; +#endif } mb->offset += num_bits; hp = HeapOnlyAlloc(p, FLOAT_SIZE_OBJECT); @@ -1014,8 +1022,13 @@ erts_new_bs_put_float(Process *c_p, Eterm arg, Uint num_bits, int flags) #endif } else if (is_small(arg)) { u.f64 = (double) signed_val(arg); +#ifdef DOUBLE_MIDDLE_ENDIAN + a = u.i32[1]; + b = u.i32[0]; +#else a = u.i32[0]; b = u.i32[1]; +#endif } else if (is_big(arg)) { if (big_to_double(arg, &u.f64) < 0) { return 0; @@ -1118,21 +1131,42 @@ erts_new_bs_put_float(Process *c_p, Eterm arg, Uint num_bits, int flags) byte *bptr; double f64; float f32; +#ifdef DOUBLE_MIDDLE_ENDIAN + FloatDef fbuf, ftmp; +#endif if (num_bits == 64) { if (is_float(arg)) { +#ifdef DOUBLE_MIDDLE_ENDIAN + FloatDef *fdp = (FloatDef*)(float_val(arg) + 1); + ftmp = *fdp; +#else bptr = (byte *) (float_val(arg) + 1); +#endif } else if (is_small(arg)) { f64 = (double) signed_val(arg); +#ifdef DOUBLE_MIDDLE_ENDIAN + ftmp.fd = f64; +#else bptr = (byte *) &f64; +#endif } else if (is_big(arg)) { if (big_to_double(arg, &f64) < 0) { return 0; } +#ifdef DOUBLE_MIDDLE_ENDIAN + ftmp.fd = f64; +#else bptr = (byte *) &f64; +#endif } else { return 0; } +#ifdef DOUBLE_MIDDLE_ENDIAN + fbuf.fw[0] = ftmp.fw[1]; + fbuf.fw[1] = ftmp.fw[0]; + bptr = fbuf.fb; +#endif } else if (num_bits == 32) { if (is_float(arg)) { FloatDef f; @@ -1457,7 +1491,7 @@ erts_bs_private_append(Process* p, Eterm bin, Eterm build_size_term, Uint unit) bptr->flags = 0; bptr->orig_size = new_size; erts_refc_init(&bptr->refc, 1); - sys_memcpy(bptr->orig_bytes, binp->orig_bytes, pb->size); + sys_memcpy(bptr->orig_bytes, binp->orig_bytes, binp->orig_size); pb->flags |= PB_IS_WRITABLE | PB_ACTIVE_WRITER; pb->val = bptr; pb->bytes = (byte *) bptr->orig_bytes; @@ -1776,6 +1810,11 @@ erts_cmp_bits(byte* a_ptr, size_t a_offs, byte* b_ptr, size_t b_offs, size_t siz Uint rshift; int cmp; + ASSERT(a_offs < 8 && b_offs < 8); + + if (size == 0) + return 0; + if (((a_offs | b_offs | size) & 7) == 0) { int byte_size = size >> 3; return sys_memcmp(a_ptr, b_ptr, byte_size); @@ -1784,58 +1823,72 @@ erts_cmp_bits(byte* a_ptr, size_t a_offs, byte* b_ptr, size_t b_offs, size_t siz /* Compare bit by bit until a_ptr is aligned on byte boundary */ a = *a_ptr++; b = *b_ptr++; - while (size > 0) { - a_bit = get_bit(a, a_offs); - b_bit = get_bit(b, b_offs); - if ((cmp = (a_bit-b_bit)) != 0) { - return cmp; - } - size--; - b_offs++; - if (b_offs == 8) { - b_offs = 0; - b = *b_ptr++; - } - a_offs++; - if (a_offs == 8) { - a_offs = 0; - a = *a_ptr++; - break; + if (a_offs) { + for (;;) { + a_bit = get_bit(a, a_offs); + b_bit = get_bit(b, b_offs); + if ((cmp = (a_bit-b_bit)) != 0) { + return cmp; + } + if (--size == 0) + return 0; + + b_offs++; + if (b_offs == 8) { + b_offs = 0; + b = *b_ptr++; + } + a_offs++; + if (a_offs == 8) { + a_offs = 0; + a = *a_ptr++; + break; + } } } /* Compare byte by byte as long as at least 8 bits remain */ - lshift = b_offs; - rshift = 8 - lshift; - while (size >= 8) { - byte b_cmp = (b << lshift); - b = *b_ptr++; - b_cmp |= b >> rshift; - if ((cmp = (a - b_cmp)) != 0) { - return cmp; - } + if (size >= 8) { + lshift = b_offs; + rshift = 8 - lshift; + for (;;) { + byte b_cmp = (b << lshift); + b = *b_ptr++; + b_cmp |= b >> rshift; + if ((cmp = (a - b_cmp)) != 0) { + return cmp; + } + size -= 8; + if (size < 8) + break; + a = *a_ptr++; + } + + if (size == 0) + return 0; a = *a_ptr++; - size -= 8; } /* Compare the remaining bits bit by bit */ - while (size > 0) { - a_bit = get_bit(a, a_offs); - b_bit = get_bit(b, b_offs); - if ((cmp = (a_bit-b_bit)) != 0) { - return cmp; - } - a_offs++; - if (a_offs == 8) { - a_offs = 0; - a = *a_ptr++; - } - b_offs++; - if (b_offs == 8) { - b_offs = 0; - b = *b_ptr++; - } - size--; + if (size > 0) { + for (;;) { + a_bit = get_bit(a, a_offs); + b_bit = get_bit(b, b_offs); + if ((cmp = (a_bit-b_bit)) != 0) { + return cmp; + } + if (--size == 0) + return 0; + + a_offs++; + ASSERT(a_offs < 8); + + b_offs++; + if (b_offs == 8) { + b_offs = 0; + b = *b_ptr++; + } + } } return 0; |