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decode: Change encoding of T16 index

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This encoding change saves a shift for the "is register" part.
This commit is contained in:
Alexis Engelke
2023-03-24 13:59:38 +01:00
parent c5f5fa1f75
commit 538708cd21
2 changed files with 7 additions and 7 deletions
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8
decode.c
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@@ -179,8 +179,8 @@ fd_decode(const uint8_t* buffer, size_t len_sz, int mode_int, uintptr_t address,
if (table_entry & 1) {
if (UNLIKELY(off >= len))
return FD_ERR_PARTIAL;
unsigned isreg = buffer[off] >= 0xc0 ? 8 : 0;
table_entry = table_walk(table_entry, ((buffer[off] >> 3) & 7) | isreg);
unsigned isreg = buffer[off] >= 0xc0;
table_entry = table_walk(table_entry, ((buffer[off] >> 2) & 0xe) | isreg);
// table_entry kinds: INSTR(0), T8E(1)
if (table_entry & 1)
table_entry = table_walk(table_entry, buffer[off] & 7);
@@ -314,8 +314,8 @@ fd_decode(const uint8_t* buffer, size_t len_sz, int mode_int, uintptr_t address,
if (table_entry & 1) {
if (UNLIKELY(off >= len))
return FD_ERR_PARTIAL;
unsigned isreg = buffer[off] >= 0xc0 ? 8 : 0;
table_entry = table_walk(table_entry, ((buffer[off] >> 3) & 7) | isreg);
unsigned isreg = buffer[off] >= 0xc0;
table_entry = table_walk(table_entry, ((buffer[off] >> 2) & 0xe) | isreg);
// table_entry kinds: INSTR(0), T8E(1), TVEX(2)
if (table_entry & 1)
table_entry = table_walk(table_entry, buffer[off] & 7);