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AVX-512: Fix rounding mode value in EVEX prefix with SAE

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If SAE is set, VL(vector length) is implied to be 512.
EVEX.L'L (=EVEX.RC) is set to 00b by default.

Signed-off-by: Jin Kyu Song <jin.kyu.song@intel.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
This commit is contained in:
Jin Kyu Song 2013-08-30 18:10:35 -07:00 committed by Cyrill Gorcunov
parent 088827bc6c
commit c47ef9490b
2 changed files with 11 additions and 7 deletions
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15
assemble.c
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@ -1167,15 +1167,18 @@ static int64_t calcsize(int32_t segment, int64_t offset, int bits,
op_er_sae = (ins->evex_brerop >= 0 ?
&ins->oprs[ins->evex_brerop] : NULL);
if (op_er_sae && (op_er_sae->decoflags & ER)) {
/* set EVEX.RC (rounding control) and b */
ins->evex_p[2] |= (((ins->evex_rm - BRC_RN) << 5) & EVEX_P2LL) |
EVEX_P2B;
if (op_er_sae && (op_er_sae->decoflags & (ER | SAE))) {
/* set EVEX.b */
ins->evex_p[2] |= EVEX_P2B;
if (op_er_sae->decoflags & ER) {
/* set EVEX.RC (rounding control) */
ins->evex_p[2] |= ((ins->evex_rm - BRC_RN) << 5)
& EVEX_P2RC;
}
} else {
/* set EVEX.L'L (vector length) */
ins->evex_p[2] |= ((ins->vex_wlp << (5 - 2)) & EVEX_P2LL);
if ((op_er_sae && (op_er_sae->decoflags & SAE)) ||
(opy->decoflags & BRDCAST_MASK)) {
if (opy->decoflags & BRDCAST_MASK) {
/* set EVEX.b */
ins->evex_p[2] |= EVEX_P2B;
}

3
nasm.h
View File

@ -514,7 +514,8 @@ static inline uint8_t get_cond_opcode(enum ccode c)
#define EVEX_P2AAA 0x07 /* EVEX P[18:16] : Embedded opmask */
#define EVEX_P2VP 0x08 /* EVEX P[19] : High-16 NDS reg */
#define EVEX_P2B 0x10 /* EVEX P[20] : Broadcast / RC / SAE */
#define EVEX_P2LL 0x60 /* EVEX P[22:21] : Vector length / RC */
#define EVEX_P2LL 0x60 /* EVEX P[22:21] : Vector length */
#define EVEX_P2RC EVEX_P2LL /* EVEX P[22:21] : Rounding control */
#define EVEX_P2Z 0x80 /* EVEX P[23] : Zeroing/Merging */
/*