moved eflags computation outside op.c
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4472 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard
parent
cad3a37d3e
commit
07d2c59558
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@ -5239,3 +5239,82 @@ void helper_movq(uint64_t *d, uint64_t *s)
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#undef SHIFT
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#endif
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static int compute_all_eflags(void)
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{
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return CC_SRC;
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}
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static int compute_c_eflags(void)
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{
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return CC_SRC & CC_C;
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}
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CCTable cc_table[CC_OP_NB] = {
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[CC_OP_DYNAMIC] = { /* should never happen */ },
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[CC_OP_EFLAGS] = { compute_all_eflags, compute_c_eflags },
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[CC_OP_MULB] = { compute_all_mulb, compute_c_mull },
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[CC_OP_MULW] = { compute_all_mulw, compute_c_mull },
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[CC_OP_MULL] = { compute_all_mull, compute_c_mull },
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[CC_OP_ADDB] = { compute_all_addb, compute_c_addb },
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[CC_OP_ADDW] = { compute_all_addw, compute_c_addw },
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[CC_OP_ADDL] = { compute_all_addl, compute_c_addl },
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[CC_OP_ADCB] = { compute_all_adcb, compute_c_adcb },
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[CC_OP_ADCW] = { compute_all_adcw, compute_c_adcw },
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[CC_OP_ADCL] = { compute_all_adcl, compute_c_adcl },
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[CC_OP_SUBB] = { compute_all_subb, compute_c_subb },
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[CC_OP_SUBW] = { compute_all_subw, compute_c_subw },
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[CC_OP_SUBL] = { compute_all_subl, compute_c_subl },
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[CC_OP_SBBB] = { compute_all_sbbb, compute_c_sbbb },
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[CC_OP_SBBW] = { compute_all_sbbw, compute_c_sbbw },
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[CC_OP_SBBL] = { compute_all_sbbl, compute_c_sbbl },
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[CC_OP_LOGICB] = { compute_all_logicb, compute_c_logicb },
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[CC_OP_LOGICW] = { compute_all_logicw, compute_c_logicw },
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[CC_OP_LOGICL] = { compute_all_logicl, compute_c_logicl },
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[CC_OP_INCB] = { compute_all_incb, compute_c_incl },
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[CC_OP_INCW] = { compute_all_incw, compute_c_incl },
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[CC_OP_INCL] = { compute_all_incl, compute_c_incl },
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[CC_OP_DECB] = { compute_all_decb, compute_c_incl },
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[CC_OP_DECW] = { compute_all_decw, compute_c_incl },
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[CC_OP_DECL] = { compute_all_decl, compute_c_incl },
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[CC_OP_SHLB] = { compute_all_shlb, compute_c_shlb },
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[CC_OP_SHLW] = { compute_all_shlw, compute_c_shlw },
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[CC_OP_SHLL] = { compute_all_shll, compute_c_shll },
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[CC_OP_SARB] = { compute_all_sarb, compute_c_sarl },
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[CC_OP_SARW] = { compute_all_sarw, compute_c_sarl },
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[CC_OP_SARL] = { compute_all_sarl, compute_c_sarl },
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#ifdef TARGET_X86_64
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[CC_OP_MULQ] = { compute_all_mulq, compute_c_mull },
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[CC_OP_ADDQ] = { compute_all_addq, compute_c_addq },
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[CC_OP_ADCQ] = { compute_all_adcq, compute_c_adcq },
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[CC_OP_SUBQ] = { compute_all_subq, compute_c_subq },
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[CC_OP_SBBQ] = { compute_all_sbbq, compute_c_sbbq },
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[CC_OP_LOGICQ] = { compute_all_logicq, compute_c_logicq },
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[CC_OP_INCQ] = { compute_all_incq, compute_c_incl },
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[CC_OP_DECQ] = { compute_all_decq, compute_c_incl },
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[CC_OP_SHLQ] = { compute_all_shlq, compute_c_shlq },
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[CC_OP_SARQ] = { compute_all_sarq, compute_c_sarl },
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#endif
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};
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@ -50,6 +50,223 @@
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#error unhandled operand size
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#endif
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/* dynamic flags computation */
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static int glue(compute_all_add, SUFFIX)(void)
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2;
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src1 = CC_SRC;
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src2 = CC_DST - CC_SRC;
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cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1;
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pf = parity_table[(uint8_t)CC_DST];
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6;
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
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of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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}
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static int glue(compute_c_add, SUFFIX)(void)
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{
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int cf;
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target_long src1;
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src1 = CC_SRC;
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cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1;
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return cf;
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}
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static int glue(compute_all_adc, SUFFIX)(void)
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2;
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src1 = CC_SRC;
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src2 = CC_DST - CC_SRC - 1;
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cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1;
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pf = parity_table[(uint8_t)CC_DST];
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6;
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
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of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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}
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static int glue(compute_c_adc, SUFFIX)(void)
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{
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int cf;
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target_long src1;
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src1 = CC_SRC;
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cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1;
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return cf;
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}
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static int glue(compute_all_sub, SUFFIX)(void)
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2;
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src1 = CC_DST + CC_SRC;
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src2 = CC_SRC;
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cf = (DATA_TYPE)src1 < (DATA_TYPE)src2;
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pf = parity_table[(uint8_t)CC_DST];
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6;
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
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of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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}
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static int glue(compute_c_sub, SUFFIX)(void)
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{
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int cf;
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target_long src1, src2;
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src1 = CC_DST + CC_SRC;
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src2 = CC_SRC;
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cf = (DATA_TYPE)src1 < (DATA_TYPE)src2;
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return cf;
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}
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static int glue(compute_all_sbb, SUFFIX)(void)
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2;
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src1 = CC_DST + CC_SRC + 1;
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src2 = CC_SRC;
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cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2;
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pf = parity_table[(uint8_t)CC_DST];
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6;
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
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of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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}
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static int glue(compute_c_sbb, SUFFIX)(void)
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{
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int cf;
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target_long src1, src2;
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src1 = CC_DST + CC_SRC + 1;
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src2 = CC_SRC;
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cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2;
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return cf;
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}
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static int glue(compute_all_logic, SUFFIX)(void)
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{
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int cf, pf, af, zf, sf, of;
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cf = 0;
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pf = parity_table[(uint8_t)CC_DST];
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af = 0;
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zf = ((DATA_TYPE)CC_DST == 0) << 6;
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
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of = 0;
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return cf | pf | af | zf | sf | of;
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}
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static int glue(compute_c_logic, SUFFIX)(void)
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{
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return 0;
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}
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static int glue(compute_all_inc, SUFFIX)(void)
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2;
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src1 = CC_DST - 1;
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src2 = 1;
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cf = CC_SRC;
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pf = parity_table[(uint8_t)CC_DST];
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6;
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
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of = ((CC_DST & DATA_MASK) == SIGN_MASK) << 11;
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return cf | pf | af | zf | sf | of;
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}
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#if DATA_BITS == 32
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static int glue(compute_c_inc, SUFFIX)(void)
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{
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return CC_SRC;
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}
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#endif
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static int glue(compute_all_dec, SUFFIX)(void)
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2;
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src1 = CC_DST + 1;
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src2 = 1;
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cf = CC_SRC;
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pf = parity_table[(uint8_t)CC_DST];
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6;
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
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of = ((CC_DST & DATA_MASK) == ((target_ulong)SIGN_MASK - 1)) << 11;
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return cf | pf | af | zf | sf | of;
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}
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static int glue(compute_all_shl, SUFFIX)(void)
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{
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int cf, pf, af, zf, sf, of;
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cf = (CC_SRC >> (DATA_BITS - 1)) & CC_C;
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pf = parity_table[(uint8_t)CC_DST];
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af = 0; /* undefined */
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zf = ((DATA_TYPE)CC_DST == 0) << 6;
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
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/* of is defined if shift count == 1 */
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of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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}
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static int glue(compute_c_shl, SUFFIX)(void)
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{
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return (CC_SRC >> (DATA_BITS - 1)) & CC_C;
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}
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#if DATA_BITS == 32
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static int glue(compute_c_sar, SUFFIX)(void)
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{
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return CC_SRC & 1;
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}
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#endif
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static int glue(compute_all_sar, SUFFIX)(void)
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{
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int cf, pf, af, zf, sf, of;
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cf = CC_SRC & 1;
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pf = parity_table[(uint8_t)CC_DST];
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af = 0; /* undefined */
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zf = ((DATA_TYPE)CC_DST == 0) << 6;
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
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/* of is defined if shift count == 1 */
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of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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}
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#if DATA_BITS == 32
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static int glue(compute_c_mul, SUFFIX)(void)
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{
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int cf;
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cf = (CC_SRC != 0);
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return cf;
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}
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#endif
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/* NOTE: we compute the flags like the P4. On olders CPUs, only OF and
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CF are modified and it is slower to do that. */
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static int glue(compute_all_mul, SUFFIX)(void)
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{
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int cf, pf, af, zf, sf, of;
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cf = (CC_SRC != 0);
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pf = parity_table[(uint8_t)CC_DST];
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af = 0; /* undefined */
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zf = ((DATA_TYPE)CC_DST == 0) << 6;
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
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of = cf << 11;
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return cf | pf | af | zf | sf | of;
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}
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/* shifts */
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target_ulong glue(helper_rcl, SUFFIX)(target_ulong t0, target_ulong t1)
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{
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int count, eflags;
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@ -752,84 +752,6 @@ void OPPROTO op_salc(void)
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EAX = (EAX & ~0xff) | ((-cf) & 0xff);
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}
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static int compute_all_eflags(void)
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{
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return CC_SRC;
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}
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static int compute_c_eflags(void)
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{
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return CC_SRC & CC_C;
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}
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CCTable cc_table[CC_OP_NB] = {
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[CC_OP_DYNAMIC] = { /* should never happen */ },
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[CC_OP_EFLAGS] = { compute_all_eflags, compute_c_eflags },
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[CC_OP_MULB] = { compute_all_mulb, compute_c_mull },
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[CC_OP_MULW] = { compute_all_mulw, compute_c_mull },
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[CC_OP_MULL] = { compute_all_mull, compute_c_mull },
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[CC_OP_ADDB] = { compute_all_addb, compute_c_addb },
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[CC_OP_ADDW] = { compute_all_addw, compute_c_addw },
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[CC_OP_ADDL] = { compute_all_addl, compute_c_addl },
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[CC_OP_ADCB] = { compute_all_adcb, compute_c_adcb },
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[CC_OP_ADCW] = { compute_all_adcw, compute_c_adcw },
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[CC_OP_ADCL] = { compute_all_adcl, compute_c_adcl },
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[CC_OP_SUBB] = { compute_all_subb, compute_c_subb },
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[CC_OP_SUBW] = { compute_all_subw, compute_c_subw },
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[CC_OP_SUBL] = { compute_all_subl, compute_c_subl },
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[CC_OP_SBBB] = { compute_all_sbbb, compute_c_sbbb },
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[CC_OP_SBBW] = { compute_all_sbbw, compute_c_sbbw },
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[CC_OP_SBBL] = { compute_all_sbbl, compute_c_sbbl },
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[CC_OP_LOGICB] = { compute_all_logicb, compute_c_logicb },
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[CC_OP_LOGICW] = { compute_all_logicw, compute_c_logicw },
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[CC_OP_LOGICL] = { compute_all_logicl, compute_c_logicl },
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[CC_OP_INCB] = { compute_all_incb, compute_c_incl },
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[CC_OP_INCW] = { compute_all_incw, compute_c_incl },
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[CC_OP_INCL] = { compute_all_incl, compute_c_incl },
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[CC_OP_DECB] = { compute_all_decb, compute_c_incl },
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[CC_OP_DECW] = { compute_all_decw, compute_c_incl },
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[CC_OP_DECL] = { compute_all_decl, compute_c_incl },
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[CC_OP_SHLB] = { compute_all_shlb, compute_c_shlb },
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[CC_OP_SHLW] = { compute_all_shlw, compute_c_shlw },
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[CC_OP_SHLL] = { compute_all_shll, compute_c_shll },
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[CC_OP_SARB] = { compute_all_sarb, compute_c_sarl },
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[CC_OP_SARW] = { compute_all_sarw, compute_c_sarl },
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[CC_OP_SARL] = { compute_all_sarl, compute_c_sarl },
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#ifdef TARGET_X86_64
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[CC_OP_MULQ] = { compute_all_mulq, compute_c_mull },
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[CC_OP_ADDQ] = { compute_all_addq, compute_c_addq },
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[CC_OP_ADCQ] = { compute_all_adcq, compute_c_adcq },
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[CC_OP_SUBQ] = { compute_all_subq, compute_c_subq },
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[CC_OP_SBBQ] = { compute_all_sbbq, compute_c_sbbq },
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[CC_OP_LOGICQ] = { compute_all_logicq, compute_c_logicq },
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[CC_OP_INCQ] = { compute_all_incq, compute_c_incl },
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[CC_OP_DECQ] = { compute_all_decq, compute_c_incl },
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[CC_OP_SHLQ] = { compute_all_shlq, compute_c_shlq },
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[CC_OP_SARQ] = { compute_all_sarq, compute_c_sarl },
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#endif
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};
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void OPPROTO op_fcomi_dummy(void)
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{
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T0 = 0;
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@ -51,221 +51,6 @@
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#error unhandled operand size
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#endif
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/* dynamic flags computation */
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static int glue(compute_all_add, SUFFIX)(void)
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||||
{
|
||||
int cf, pf, af, zf, sf, of;
|
||||
target_long src1, src2;
|
||||
src1 = CC_SRC;
|
||||
src2 = CC_DST - CC_SRC;
|
||||
cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1;
|
||||
pf = parity_table[(uint8_t)CC_DST];
|
||||
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
||||
zf = ((DATA_TYPE)CC_DST == 0) << 6;
|
||||
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
|
||||
of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
|
||||
return cf | pf | af | zf | sf | of;
|
||||
}
|
||||
|
||||
static int glue(compute_c_add, SUFFIX)(void)
|
||||
{
|
||||
int cf;
|
||||
target_long src1;
|
||||
src1 = CC_SRC;
|
||||
cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1;
|
||||
return cf;
|
||||
}
|
||||
|
||||
static int glue(compute_all_adc, SUFFIX)(void)
|
||||
{
|
||||
int cf, pf, af, zf, sf, of;
|
||||
target_long src1, src2;
|
||||
src1 = CC_SRC;
|
||||
src2 = CC_DST - CC_SRC - 1;
|
||||
cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1;
|
||||
pf = parity_table[(uint8_t)CC_DST];
|
||||
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
||||
zf = ((DATA_TYPE)CC_DST == 0) << 6;
|
||||
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
|
||||
of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
|
||||
return cf | pf | af | zf | sf | of;
|
||||
}
|
||||
|
||||
static int glue(compute_c_adc, SUFFIX)(void)
|
||||
{
|
||||
int cf;
|
||||
target_long src1;
|
||||
src1 = CC_SRC;
|
||||
cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1;
|
||||
return cf;
|
||||
}
|
||||
|
||||
static int glue(compute_all_sub, SUFFIX)(void)
|
||||
{
|
||||
int cf, pf, af, zf, sf, of;
|
||||
target_long src1, src2;
|
||||
src1 = CC_DST + CC_SRC;
|
||||
src2 = CC_SRC;
|
||||
cf = (DATA_TYPE)src1 < (DATA_TYPE)src2;
|
||||
pf = parity_table[(uint8_t)CC_DST];
|
||||
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
||||
zf = ((DATA_TYPE)CC_DST == 0) << 6;
|
||||
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
|
||||
of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
|
||||
return cf | pf | af | zf | sf | of;
|
||||
}
|
||||
|
||||
static int glue(compute_c_sub, SUFFIX)(void)
|
||||
{
|
||||
int cf;
|
||||
target_long src1, src2;
|
||||
src1 = CC_DST + CC_SRC;
|
||||
src2 = CC_SRC;
|
||||
cf = (DATA_TYPE)src1 < (DATA_TYPE)src2;
|
||||
return cf;
|
||||
}
|
||||
|
||||
static int glue(compute_all_sbb, SUFFIX)(void)
|
||||
{
|
||||
int cf, pf, af, zf, sf, of;
|
||||
target_long src1, src2;
|
||||
src1 = CC_DST + CC_SRC + 1;
|
||||
src2 = CC_SRC;
|
||||
cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2;
|
||||
pf = parity_table[(uint8_t)CC_DST];
|
||||
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
||||
zf = ((DATA_TYPE)CC_DST == 0) << 6;
|
||||
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
|
||||
of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
|
||||
return cf | pf | af | zf | sf | of;
|
||||
}
|
||||
|
||||
static int glue(compute_c_sbb, SUFFIX)(void)
|
||||
{
|
||||
int cf;
|
||||
target_long src1, src2;
|
||||
src1 = CC_DST + CC_SRC + 1;
|
||||
src2 = CC_SRC;
|
||||
cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2;
|
||||
return cf;
|
||||
}
|
||||
|
||||
static int glue(compute_all_logic, SUFFIX)(void)
|
||||
{
|
||||
int cf, pf, af, zf, sf, of;
|
||||
cf = 0;
|
||||
pf = parity_table[(uint8_t)CC_DST];
|
||||
af = 0;
|
||||
zf = ((DATA_TYPE)CC_DST == 0) << 6;
|
||||
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
|
||||
of = 0;
|
||||
return cf | pf | af | zf | sf | of;
|
||||
}
|
||||
|
||||
static int glue(compute_c_logic, SUFFIX)(void)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int glue(compute_all_inc, SUFFIX)(void)
|
||||
{
|
||||
int cf, pf, af, zf, sf, of;
|
||||
target_long src1, src2;
|
||||
src1 = CC_DST - 1;
|
||||
src2 = 1;
|
||||
cf = CC_SRC;
|
||||
pf = parity_table[(uint8_t)CC_DST];
|
||||
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
||||
zf = ((DATA_TYPE)CC_DST == 0) << 6;
|
||||
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
|
||||
of = ((CC_DST & DATA_MASK) == SIGN_MASK) << 11;
|
||||
return cf | pf | af | zf | sf | of;
|
||||
}
|
||||
|
||||
#if DATA_BITS == 32
|
||||
static int glue(compute_c_inc, SUFFIX)(void)
|
||||
{
|
||||
return CC_SRC;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int glue(compute_all_dec, SUFFIX)(void)
|
||||
{
|
||||
int cf, pf, af, zf, sf, of;
|
||||
target_long src1, src2;
|
||||
src1 = CC_DST + 1;
|
||||
src2 = 1;
|
||||
cf = CC_SRC;
|
||||
pf = parity_table[(uint8_t)CC_DST];
|
||||
af = (CC_DST ^ src1 ^ src2) & 0x10;
|
||||
zf = ((DATA_TYPE)CC_DST == 0) << 6;
|
||||
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
|
||||
of = ((CC_DST & DATA_MASK) == ((target_ulong)SIGN_MASK - 1)) << 11;
|
||||
return cf | pf | af | zf | sf | of;
|
||||
}
|
||||
|
||||
static int glue(compute_all_shl, SUFFIX)(void)
|
||||
{
|
||||
int cf, pf, af, zf, sf, of;
|
||||
cf = (CC_SRC >> (DATA_BITS - 1)) & CC_C;
|
||||
pf = parity_table[(uint8_t)CC_DST];
|
||||
af = 0; /* undefined */
|
||||
zf = ((DATA_TYPE)CC_DST == 0) << 6;
|
||||
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
|
||||
/* of is defined if shift count == 1 */
|
||||
of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
|
||||
return cf | pf | af | zf | sf | of;
|
||||
}
|
||||
|
||||
static int glue(compute_c_shl, SUFFIX)(void)
|
||||
{
|
||||
return (CC_SRC >> (DATA_BITS - 1)) & CC_C;
|
||||
}
|
||||
|
||||
#if DATA_BITS == 32
|
||||
static int glue(compute_c_sar, SUFFIX)(void)
|
||||
{
|
||||
return CC_SRC & 1;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int glue(compute_all_sar, SUFFIX)(void)
|
||||
{
|
||||
int cf, pf, af, zf, sf, of;
|
||||
cf = CC_SRC & 1;
|
||||
pf = parity_table[(uint8_t)CC_DST];
|
||||
af = 0; /* undefined */
|
||||
zf = ((DATA_TYPE)CC_DST == 0) << 6;
|
||||
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
|
||||
/* of is defined if shift count == 1 */
|
||||
of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
|
||||
return cf | pf | af | zf | sf | of;
|
||||
}
|
||||
|
||||
#if DATA_BITS == 32
|
||||
static int glue(compute_c_mul, SUFFIX)(void)
|
||||
{
|
||||
int cf;
|
||||
cf = (CC_SRC != 0);
|
||||
return cf;
|
||||
}
|
||||
#endif
|
||||
|
||||
/* NOTE: we compute the flags like the P4. On olders CPUs, only OF and
|
||||
CF are modified and it is slower to do that. */
|
||||
static int glue(compute_all_mul, SUFFIX)(void)
|
||||
{
|
||||
int cf, pf, af, zf, sf, of;
|
||||
cf = (CC_SRC != 0);
|
||||
pf = parity_table[(uint8_t)CC_DST];
|
||||
af = 0; /* undefined */
|
||||
zf = ((DATA_TYPE)CC_DST == 0) << 6;
|
||||
sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80;
|
||||
of = cf << 11;
|
||||
return cf | pf | af | zf | sf | of;
|
||||
}
|
||||
|
||||
/* various optimized jumps cases */
|
||||
|
||||
void OPPROTO glue(op_jb_sub, SUFFIX)(void)
|
||||
|
|
|
|||
Reference in New Issue