[Python] automatically converts the designated initializers in the GCC Extension

As a major extension of GCC, designated initializers is one of the main obstacles to porting code platforms. The following is a targeted example. Other types of designated initializers can be processed by modifying the regular expression in the script.

#!/usr/bin/python# assume the offset is in order, or the result could be incorrectimport restru_list = ["sse_op_table1"]leading_space = "    "# we have the form [0x..] = {},def print_without_offset(text):    val = text.split('=', 1);    if val:        print leading_space + val[1].lstrip()    else:        assert 0def print_one_elem(text):    res = re.search(r"{", text)    if not res:        val = re.search(r"(.*) = (.*),(.*)", text)        if val:            print leading_space + "{ " + val.group(2) + " }," + val.group(3)            pass        else:            assert 0    else:        print_without_offset(text)def translate_struct(size):    idx = 0x0           while True:        try:            text = raw_input()        except EOFError:            break                if (text.lstrip().rstrip() == "};"):    # meet the end of struct definition            if (idx != size):                for i in range(idx, (size - 1)):                    print "%s{ NULL }," % (leading_space)                print "%s{ NULL }" % (leading_space)            print text # print "};"            break        result = re.search(r"^(\s*)\[0x([\da-f]+)\] =", text)        if not result:            print text  # probably blank line or comments            continue                cur_idx = int(result.group(2), 16)        assert(cur_idx >= idx)        if (idx != cur_idx):            leading_space = result.group(1)            for i in range(idx, cur_idx):                print "%s{ NULL }," % (leading_space)        # print the current one        print_one_elem(text)        idx = cur_idx + 1while True:    try:        text = raw_input()    except EOFError:        break    for elem in stru_list:        elem = elem + r"\[(\d+)\]"           result = re.search(elem, text)        if result:            #TODO:            print text            translate_struct(int(result.group(1)))            break;

Here, stru_list specifies the name of the struct to be converted.

If you have the following struct (in the. c file), convert it to a non-GCC extension format.

static void *sse_op_table1[256][4] = {    /* 3DNow! extensions */    [0x0e] = { SSE_DUMMY }, /* femms */    [0x0f] = { SSE_DUMMY }, /* pf... */    /* pure SSE operations */    [0x10] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movups, movupd, movss, movsd */    [0x11] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movups, movupd, movss, movsd */    [0x12] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movlps, movlpd, movsldup, movddup */    [0x13] = { SSE_SPECIAL, SSE_SPECIAL },  /* movlps, movlpd */    [0x14] = { gen_helper_punpckldq_xmm, gen_helper_punpcklqdq_xmm },    [0x15] = { gen_helper_punpckhdq_xmm, gen_helper_punpckhqdq_xmm },    [0x16] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL },  /* movhps, movhpd, movshdup */    [0x17] = { SSE_SPECIAL, SSE_SPECIAL },  /* movhps, movhpd */    [0x28] = { SSE_SPECIAL, SSE_SPECIAL },  /* movaps, movapd */    [0x29] = { SSE_SPECIAL, SSE_SPECIAL },  /* movaps, movapd */    [0x2a] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* cvtpi2ps, cvtpi2pd, cvtsi2ss, cvtsi2sd */    [0x2b] = { SSE_SPECIAL, SSE_SPECIAL },  /* movntps, movntpd */    [0x2c] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* cvttps2pi, cvttpd2pi, cvttsd2si, cvttss2si */    [0x2d] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* cvtps2pi, cvtpd2pi, cvtsd2si, cvtss2si */    [0x2e] = { gen_helper_ucomiss, gen_helper_ucomisd },    [0x2f] = { gen_helper_comiss, gen_helper_comisd },    [0x38] = { SSE_SPECIAL, SSE_SPECIAL, NULL, SSE_SPECIAL }, /* SSSE3/SSE4 */    [0x3a] = { SSE_SPECIAL, SSE_SPECIAL }, /* SSSE3/SSE4 */    [0x50] = { SSE_SPECIAL, SSE_SPECIAL }, /* movmskps, movmskpd */    [0x51] = SSE_FOP(sqrt),    [0x52] = { gen_helper_rsqrtps, NULL, gen_helper_rsqrtss, NULL },    [0x53] = { gen_helper_rcpps, NULL, gen_helper_rcpss, NULL },    [0x54] = { gen_helper_pand_xmm, gen_helper_pand_xmm }, /* andps, andpd */    [0x55] = { gen_helper_pandn_xmm, gen_helper_pandn_xmm }, /* andnps, andnpd */    [0x56] = { gen_helper_por_xmm, gen_helper_por_xmm }, /* orps, orpd */    [0x57] = { gen_helper_pxor_xmm, gen_helper_pxor_xmm }, /* xorps, xorpd */    [0x58] = SSE_FOP(add),    [0x59] = SSE_FOP(mul),    [0x5a] = { gen_helper_cvtps2pd, gen_helper_cvtpd2ps,               gen_helper_cvtss2sd, gen_helper_cvtsd2ss },    [0x5b] = { gen_helper_cvtdq2ps, gen_helper_cvtps2dq, gen_helper_cvttps2dq },    [0x5c] = SSE_FOP(sub),    [0x5d] = SSE_FOP(min),    [0x5e] = SSE_FOP(div),    [0x5f] = SSE_FOP(max),    /* MMX ops and their SSE extensions */    [0x60] = MMX_OP2(punpcklbw),    [0x61] = MMX_OP2(punpcklwd),    [0x62] = MMX_OP2(punpckldq),    [0x63] = MMX_OP2(packsswb),    [0x64] = MMX_OP2(pcmpgtb),    [0x65] = MMX_OP2(pcmpgtw),    [0x66] = MMX_OP2(pcmpgtl),    [0x67] = MMX_OP2(packuswb),    [0x68] = MMX_OP2(punpckhbw),    [0x69] = MMX_OP2(punpckhwd),    [0x6a] = MMX_OP2(punpckhdq),    [0x6b] = MMX_OP2(packssdw),    [0x6c] = { NULL, gen_helper_punpcklqdq_xmm },    [0x6d] = { NULL, gen_helper_punpckhqdq_xmm },    [0x6e] = { SSE_SPECIAL, SSE_SPECIAL }, /* movd mm, ea */    [0x6f] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movq, movdqa, , movqdu */    [0x70] = { gen_helper_pshufw_mmx,               gen_helper_pshufd_xmm,               gen_helper_pshufhw_xmm,               gen_helper_pshuflw_xmm },    [0x71] = { SSE_SPECIAL, SSE_SPECIAL }, /* shiftw */    [0x72] = { SSE_SPECIAL, SSE_SPECIAL }, /* shiftd */    [0x73] = { SSE_SPECIAL, SSE_SPECIAL }, /* shiftq */    [0x74] = MMX_OP2(pcmpeqb),    [0x75] = MMX_OP2(pcmpeqw),    [0x76] = MMX_OP2(pcmpeql),    [0x77] = { SSE_DUMMY }, /* emms */    [0x7c] = { NULL, gen_helper_haddpd, NULL, gen_helper_haddps },    [0x7d] = { NULL, gen_helper_hsubpd, NULL, gen_helper_hsubps },    [0x7e] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movd, movd, , movq */    [0x7f] = { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movq, movdqa, movdqu */    [0xc2] = SSE_FOP(cmpeq),    [0xc4] = { SSE_SPECIAL, SSE_SPECIAL }, /* pinsrw */    [0xc5] = { SSE_SPECIAL, SSE_SPECIAL }, /* pextrw */    [0xc6] = { gen_helper_shufps, gen_helper_shufpd },    [0xd0] = { NULL, gen_helper_addsubpd, NULL, gen_helper_addsubps },    [0xd1] = MMX_OP2(psrlw),    [0xd2] = MMX_OP2(psrld),    [0xd3] = MMX_OP2(psrlq),    [0xd4] = MMX_OP2(paddq),    [0xd5] = MMX_OP2(pmullw),    [0xd6] = { NULL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL },    [0xd7] = { SSE_SPECIAL, SSE_SPECIAL }, /* pmovmskb */    [0xd8] = MMX_OP2(psubusb),    [0xd9] = MMX_OP2(psubusw),    [0xda] = MMX_OP2(pminub),    [0xdb] = MMX_OP2(pand),    [0xdc] = MMX_OP2(paddusb),    [0xdd] = MMX_OP2(paddusw),    [0xde] = MMX_OP2(pmaxub),    [0xdf] = MMX_OP2(pandn),    [0xe0] = MMX_OP2(pavgb),    [0xe1] = MMX_OP2(psraw),    [0xe2] = MMX_OP2(psrad),    [0xe3] = MMX_OP2(pavgw),    [0xe4] = MMX_OP2(pmulhuw),    [0xe5] = MMX_OP2(pmulhw),    [0xe6] = { NULL, gen_helper_cvttpd2dq, gen_helper_cvtdq2pd, gen_helper_cvtpd2dq },    [0xe7] = { SSE_SPECIAL , SSE_SPECIAL },  /* movntq, movntq */    [0xe8] = MMX_OP2(psubsb),    [0xe9] = MMX_OP2(psubsw),    [0xea] = MMX_OP2(pminsw),    [0xeb] = MMX_OP2(por),    [0xec] = MMX_OP2(paddsb),    [0xed] = MMX_OP2(paddsw),    [0xee] = MMX_OP2(pmaxsw),    [0xef] = MMX_OP2(pxor),    [0xf0] = { NULL, NULL, NULL, SSE_SPECIAL }, /* lddqu */    [0xf1] = MMX_OP2(psllw),    [0xf2] = MMX_OP2(pslld),    [0xf3] = MMX_OP2(psllq),    [0xf4] = MMX_OP2(pmuludq),    [0xf5] = MMX_OP2(pmaddwd),    [0xf6] = MMX_OP2(psadbw),    [0xf7] = MMX_OP2(maskmov),    [0xf8] = MMX_OP2(psubb),    [0xf9] = MMX_OP2(psubw),    [0xfa] = MMX_OP2(psubl),    [0xfb] = MMX_OP2(psubq),    [0xfc] = MMX_OP2(paddb),    [0xfd] = MMX_OP2(paddw),    [0xfe] = MMX_OP2(paddl),};

Run the above script

./Main. py <A. C> B. C

The. c file is generated:

static void *sse_op_table1[256][4] = {    /* 3DNow! extensions */    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { SSE_DUMMY }, /* femms */    { SSE_DUMMY }, /* pf... */    /* pure SSE operations */    { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movups, movupd, movss, movsd */    { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movups, movupd, movss, movsd */    { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movlps, movlpd, movsldup, movddup */    { SSE_SPECIAL, SSE_SPECIAL },  /* movlps, movlpd */    { gen_helper_punpckldq_xmm, gen_helper_punpcklqdq_xmm },    { gen_helper_punpckhdq_xmm, gen_helper_punpckhqdq_xmm },    { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL },  /* movhps, movhpd, movshdup */    { SSE_SPECIAL, SSE_SPECIAL },  /* movhps, movhpd */    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { SSE_SPECIAL, SSE_SPECIAL },  /* movaps, movapd */    { SSE_SPECIAL, SSE_SPECIAL },  /* movaps, movapd */    { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* cvtpi2ps, cvtpi2pd, cvtsi2ss, cvtsi2sd */    { SSE_SPECIAL, SSE_SPECIAL },  /* movntps, movntpd */    { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* cvttps2pi, cvttpd2pi, cvttsd2si, cvttss2si */    { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* cvtps2pi, cvtpd2pi, cvtsd2si, cvtss2si */    { gen_helper_ucomiss, gen_helper_ucomisd },    { gen_helper_comiss, gen_helper_comisd },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { SSE_SPECIAL, SSE_SPECIAL, NULL, SSE_SPECIAL }, /* SSSE3/SSE4 */    { NULL },    { SSE_SPECIAL, SSE_SPECIAL }, /* SSSE3/SSE4 */    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { SSE_SPECIAL, SSE_SPECIAL }, /* movmskps, movmskpd */    { SSE_FOP(sqrt) },    { gen_helper_rsqrtps, NULL, gen_helper_rsqrtss, NULL },    { gen_helper_rcpps, NULL, gen_helper_rcpss, NULL },    { gen_helper_pand_xmm, gen_helper_pand_xmm }, /* andps, andpd */    { gen_helper_pandn_xmm, gen_helper_pandn_xmm }, /* andnps, andnpd */    { gen_helper_por_xmm, gen_helper_por_xmm }, /* orps, orpd */    { gen_helper_pxor_xmm, gen_helper_pxor_xmm }, /* xorps, xorpd */    { SSE_FOP(add) },    { SSE_FOP(mul) },    { gen_helper_cvtps2pd, gen_helper_cvtpd2ps,               gen_helper_cvtss2sd, gen_helper_cvtsd2ss },    { gen_helper_cvtdq2ps, gen_helper_cvtps2dq, gen_helper_cvttps2dq },    { SSE_FOP(sub) },    { SSE_FOP(min) },    { SSE_FOP(div) },    { SSE_FOP(max) },    /* MMX ops and their SSE extensions */    { MMX_OP2(punpcklbw) },    { MMX_OP2(punpcklwd) },    { MMX_OP2(punpckldq) },    { MMX_OP2(packsswb) },    { MMX_OP2(pcmpgtb) },    { MMX_OP2(pcmpgtw) },    { MMX_OP2(pcmpgtl) },    { MMX_OP2(packuswb) },    { MMX_OP2(punpckhbw) },    { MMX_OP2(punpckhwd) },    { MMX_OP2(punpckhdq) },    { MMX_OP2(packssdw) },    { NULL, gen_helper_punpcklqdq_xmm },    { NULL, gen_helper_punpckhqdq_xmm },    { SSE_SPECIAL, SSE_SPECIAL }, /* movd mm, ea */    { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movq, movdqa, , movqdu */    { gen_helper_pshufw_mmx,               gen_helper_pshufd_xmm,               gen_helper_pshufhw_xmm,               gen_helper_pshuflw_xmm },    { SSE_SPECIAL, SSE_SPECIAL }, /* shiftw */    { SSE_SPECIAL, SSE_SPECIAL }, /* shiftd */    { SSE_SPECIAL, SSE_SPECIAL }, /* shiftq */    { MMX_OP2(pcmpeqb) },    { MMX_OP2(pcmpeqw) },    { MMX_OP2(pcmpeql) },    { SSE_DUMMY }, /* emms */    { NULL },    { NULL },    { NULL },    { NULL },    { NULL, gen_helper_haddpd, NULL, gen_helper_haddps },    { NULL, gen_helper_hsubpd, NULL, gen_helper_hsubps },    { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movd, movd, , movq */    { SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL }, /* movq, movdqa, movdqu */    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { SSE_FOP(cmpeq) },    { NULL },    { SSE_SPECIAL, SSE_SPECIAL }, /* pinsrw */    { SSE_SPECIAL, SSE_SPECIAL }, /* pextrw */    { gen_helper_shufps, gen_helper_shufpd },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL },    { NULL, gen_helper_addsubpd, NULL, gen_helper_addsubps },    { MMX_OP2(psrlw) },    { MMX_OP2(psrld) },    { MMX_OP2(psrlq) },    { MMX_OP2(paddq) },    { MMX_OP2(pmullw) },    { NULL, SSE_SPECIAL, SSE_SPECIAL, SSE_SPECIAL },    { SSE_SPECIAL, SSE_SPECIAL }, /* pmovmskb */    { MMX_OP2(psubusb) },    { MMX_OP2(psubusw) },    { MMX_OP2(pminub) },    { MMX_OP2(pand) },    { MMX_OP2(paddusb) },    { MMX_OP2(paddusw) },    { MMX_OP2(pmaxub) },    { MMX_OP2(pandn) },    { MMX_OP2(pavgb) },    { MMX_OP2(psraw) },    { MMX_OP2(psrad) },    { MMX_OP2(pavgw) },    { MMX_OP2(pmulhuw) },    { MMX_OP2(pmulhw) },    { NULL, gen_helper_cvttpd2dq, gen_helper_cvtdq2pd, gen_helper_cvtpd2dq },    { SSE_SPECIAL , SSE_SPECIAL },  /* movntq, movntq */    { MMX_OP2(psubsb) },    { MMX_OP2(psubsw) },    { MMX_OP2(pminsw) },    { MMX_OP2(por) },    { MMX_OP2(paddsb) },    { MMX_OP2(paddsw) },    { MMX_OP2(pmaxsw) },    { MMX_OP2(pxor) },    { NULL, NULL, NULL, SSE_SPECIAL }, /* lddqu */    { MMX_OP2(psllw) },    { MMX_OP2(pslld) },    { MMX_OP2(psllq) },    { MMX_OP2(pmuludq) },    { MMX_OP2(pmaddwd) },    { MMX_OP2(psadbw) },    { MMX_OP2(maskmov) },    { MMX_OP2(psubb) },    { MMX_OP2(psubw) },    { MMX_OP2(psubl) },    { MMX_OP2(psubq) },    { MMX_OP2(paddb) },    { MMX_OP2(paddw) },    { MMX_OP2(paddl) },    { NULL }};