T0b1/test-repo
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

encode: Remove descriptor table

Browse Source 
All relevant information is now encoded directly in the numeric value of
the mnemonic, significantly shrinking the size of the encoder.
This commit is contained in:
Alexis Engelke
2023-01-13 14:23:07 +01:00
parent 9f0ddeb44a
commit 2f7e8dd0de
4 changed files with 174 additions and 184 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
fadec-enc.h
View File

@@ -32,25 +32,20 @@ typedef int64_t FeOp;
/** Add segment override prefix. This may or may not generate prefixes for the
* ignored prefixes ES/CS/DS/SS in 64-bit mode. **/
#define FE_SEG(seg) ((((seg) & 0x7) + 1) << 16)
#define FE_SEG(seg) ((uint64_t) (((seg) & 0x7) + 1) << 29)
/** Do not use. **/
#define FE_SEG_MASK 0x70000
#define FE_SEG_MASK 0xe0000000
/** Overrides address size. **/
#define FE_ADDR32 0x80000
#define FE_ADDR32 0x10000000
/** Used together with a RIP-relative (conditional) jump, this will force the
* use of the encoding with the largest distance. Useful for reserving a jump
* when the target offset is still unknown; if the jump is re-encoded later on,
* FE_JMPL must be specified there, too, so that the encoding lengths match. **/
#define FE_JMPL 0x100000
/** Do not use. **/
#define FE_MNEM_MASK 0xffff
#define FE_JMPL 0x100000000
#define FE_MASK(kreg) ((uint64_t) ((kreg) & 0x7) << 33)
#define FE_MASKZ(kreg) ((uint64_t) ((kreg) & 0x7) << 33 | 0x1000000000)
enum {
#define FE_MNEMONIC(name,value) name = value,
#include <fadec-encode-public.inc>
#undef FE_MNEMONIC
FE_MNEM_MAX
};
/** Do not use. **/
#define fe_enc64_1(buf, mnem, op0, op1, op2, op3, ...) fe_enc64_impl(buf, mnem, op0, op1, op2, op3)