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fadec: Store broadcast size in segment

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This is a preparation for AVX512-FP16, where the broadcast size is not
just 32/64 bit depending solely on EVEX.W, but can also be 16 bit (with
EVEX.W=0). The broadcast size therefore needs two bits, but the evex
field only had one free bit left. Store broadcast size with the segment
for now. (This is not a good fit and is likely to change at some point.)
This commit is contained in:
Alexis Engelke
2022-12-26 16:57:22 +01:00
parent a3c8848005
commit 06832825ec
3 changed files with 13 additions and 11 deletions
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10
format.c
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@@ -410,7 +410,7 @@ fd_format_impl(char buf[DECLARE_RESTRICTED_ARRAY_SIZE(128)], const FdInstr* inst
}
if (op_type == FD_OT_MEMBCST)
size = FD_OP_BCST64(instr, i) ? 3 : 2;
size = FD_OP_BCSTSZLG(instr, i);
const char* ptrsizes =
"\00 "
@@ -461,10 +461,10 @@ fd_format_impl(char buf[DECLARE_RESTRICTED_ARRAY_SIZE(128)], const FdInstr* inst
*buf++ = ']';
if (UNLIKELY(op_type == FD_OT_MEMBCST)) {
// {1toX}, X = FD_OP_SIZE(instr, i) / size (=> 2/4/8/16)
unsigned bcstszidx = FD_OP_SIZE(instr, i) >> (FD_OP_BCST64(instr, i) + 1);
const char* bcstsizes = "\6{1to2} \6{1to4} \6{1to8} \0 \7{1to16} ";
const char* bcstsize = bcstsizes + bcstszidx;
// {1toX}, X = FD_OP_SIZE(instr, i) / BCSTSZ (=> 2/4/8/16/32)
unsigned bcstszidx = FD_OP_SIZELG(instr, i) - FD_OP_BCSTSZLG(instr, i) - 1;
const char* bcstsizes = "\6{1to2} \6{1to4} \6{1to8} \7{1to16}\7{1to32} ";
const char* bcstsize = bcstsizes + bcstszidx * 8;
buf = fd_strpcat(buf, (struct FdStr) { bcstsize+1, *bcstsize });
}
} else if (op_type == FD_OT_IMM || op_type == FD_OT_OFF) {