ed/perfaware
1
0
Fork 0
mirror of https://github.com/Ed94/perfaware.git synced 2026-09-14 03:39:23 +00:00
Code Issues Packages Projects Releases Wiki Activity

simplifcation of encoding table, properly define compositionaly various encoding definitions.

Browse Source
This commit is contained in:
ed
2026-09-09 14:03:30 -04:00
parent 588fa20778
commit 95e67a8c1a
6 changed files with 397 additions and 827 deletions
Download Patch File Download Diff File Expand all files Collapse all files
code/8086/decoder.c
+19 -1
View File
@@ -44,6 +44,8 @@ typedef Struct_(X8616_DecodePlex) {
X8616_Sign s;
X8616_VariableShift v;
X8616_Repeat z;
X8616_ALU alu;
X8616_Condition cc;
X8616_DecodedReg reg_opcode;
X8616_Segment sr_opcode;
@@ -275,10 +277,18 @@ x8616_decode_one_plex(X8616_DecodePlex* plex)
plex->mod = C_(X8616_Mod, x8616_modrm_mod(plex->mod_rm));
plex->reg.r16 = C_(X8616_Reg16, x8616_modrm_reg(plex->mod_rm));
plex->rm = C_(X8616_EA, x8616_modrm_rm(plex->mod_rm));
plex->sr_modrm = C_(X8616_Segment, x8616_modrm_sr(plex->mod_rm));
plex->sr_modrm = C_(X8616_Segment, x8616_modrm_sr(plex->mod_rm));
plex->body_at += 1;
}
if (plan->flags & x8616_plan_has_alu) {
if (plan->flags & x8616_plan_alu_modrm) plex->alu = C_(X8616_ALU, plex->reg.r16);
else plex->alu = C_(X8616_ALU, (plex->opcode >> plan->alu_shift) & x8616_field_mask(0, X8616_OPCODE_ALU_TTT_WIDTH));
}
if (plan->flags & x8616_plan_has_cc) {
plex->cc = C_(X8616_Condition, (plex->opcode >> plan->cc_shift) & x8616_field_mask(0, X8616_OPCODE_CC_WIDTH));
}
plex->displacement_at = plex->body_at;
if (plan->flags & x8616_plan_uses_rm) plex->displacement_bytes = x8616_decode_disp_bytes[(u1_(plex->mod) << 3) | u1_(plex->rm)];
@@ -412,6 +422,14 @@ x8616_decode_one_plex(X8616_DecodePlex* plex)
plex->instruction.operands[swap ^ 1] = source[plan->operands[1]];
plex->instruction.op = plan->op;
if (plan->flags & x8616_plan_has_alu) {
plex->instruction.alu = plex->alu;
plex->instruction.op = x8616_op_from_alu[plex->alu];
}
if (plan->flags & x8616_plan_has_cc) {
plex->instruction.cc = plex->cc;
plex->instruction.op = x8616_op_from_cc[plex->cc];
}
plex->instruction.flags = plan->encoding_flags;
plex->instruction.decode_flags = (plex->encoding_invalid ? x8616_decode_invalid : 0) | (plex->classification_truncated ? x8616_decode_truncated : 0);
plex->instruction.width = plex->width;