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AVX-512: Fix instruction match function

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When an instruction allows broadcasting, the memory element size is
different from the size of normal memory operation.
This information is provided in a decoflags field, so it should try to
match those properties before it fails.

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 2013-08-21 19:29:10 -07:00 committed by Cyrill Gorcunov
parent f9a71e0c38
commit 4d1fc3f1a0
3 changed files with 48 additions and 7 deletions
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35
assemble.c
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@ -1915,10 +1915,22 @@ static enum match_result find_match(const struct itemplate **tempp,
enum match_result m, merr;
opflags_t xsizeflags[MAX_OPERANDS];
bool opsizemissing = false;
int8_t broadcast = -1;
int i;
/* find the position of broadcasting operand */
for (i = 0; i < instruction->operands; i++)
xsizeflags[i] = instruction->oprs[i].type & SIZE_MASK;
if (instruction->oprs[i].decoflags & BRDCAST_MASK) {
broadcast = i;
break;
}
/* broadcasting uses a different data element size */
for (i = 0; i < instruction->operands; i++)
if (i == broadcast)
xsizeflags[i] = instruction->oprs[i].decoflags & BRSIZE_MASK;
else
xsizeflags[i] = instruction->oprs[i].type & SIZE_MASK;
merr = MERR_INVALOP;
@ -1936,7 +1948,10 @@ static enum match_result find_match(const struct itemplate **tempp,
* Missing operand size and a candidate for fuzzy matching...
*/
for (i = 0; i < temp->operands; i++)
xsizeflags[i] |= temp->opd[i] & SIZE_MASK;
if (i == broadcast)
xsizeflags[i] |= temp->deco[i] & BRSIZE_MASK;
else
xsizeflags[i] |= temp->opd[i] & SIZE_MASK;
opsizemissing = true;
}
if (m > merr)
@ -1962,7 +1977,10 @@ static enum match_result find_match(const struct itemplate **tempp,
if ((xsizeflags[i] & (xsizeflags[i]-1)))
goto done; /* No luck */
instruction->oprs[i].type |= xsizeflags[i]; /* Set the size */
if (i == broadcast)
instruction->oprs[i].decoflags |= xsizeflags[i];
else
instruction->oprs[i].type |= xsizeflags[i]; /* Set the size */
}
/* Try matching again... */
@ -2107,7 +2125,16 @@ static enum match_result matches(const struct itemplate *itemp,
} else if ((itemp->opd[i] & SIZE_MASK) &&
(itemp->opd[i] & SIZE_MASK) != (type & SIZE_MASK)) {
if (type & SIZE_MASK) {
return MERR_INVALOP;
/*
* when broadcasting, the element size depends on
* the instruction type. decorator flag should match.
*/
#define MATCH_BRSZ(bits) (((type & SIZE_MASK) == BITS##bits) && \
((itemp->deco[i] & BRSIZE_MASK) == BR_BITS##bits))
if (!((deco & BRDCAST_MASK) &&
(MATCH_BRSZ(32) || MATCH_BRSZ(64)))) {
return MERR_INVALOP;
}
} else if (!is_class(REGISTER, type)) {
/*
* Note: we don't honor extrinsic operand sizes for registers,

18
nasm.h
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@ -1038,6 +1038,7 @@ enum decorator_tokens {
* ..........................1..... broadcast
* .........................1...... static rounding
* ........................1....... SAE
* ......................11........ broadcast element size
*/
#define OP_GENVAL(val, bits, shift) (((val) & ((UINT64_C(1) << (bits)) - 1)) << (shift))
@ -1096,10 +1097,23 @@ enum decorator_tokens {
#define SAE_MASK OP_GENMASK(SAE_BITS, SAE_SHIFT)
#define GEN_SAE(bit) OP_GENBIT(bit, SAE_SHIFT)
/*
* Broadcasting element size.
*
* Bits: 8 - 9
*/
#define BRSIZE_SHIFT (8)
#define BRSIZE_BITS (2)
#define BRSIZE_MASK OP_GENMASK(BRSIZE_BITS, BRSIZE_SHIFT)
#define GEN_BRSIZE(bit) OP_GENBIT(bit, BRSIZE_SHIFT)
#define BR_BITS32 GEN_BRSIZE(0)
#define BR_BITS64 GEN_BRSIZE(1)
#define MASK OPMASK_MASK /* Opmask (k1 ~ 7) can be used */
#define Z Z_MASK
#define B32 BRDCAST_MASK /* {1to16} : load+op instruction can broadcast when it is reg-reg operation */
#define B64 BRDCAST_MASK /* {1to8} : There are two definitions just for conforming to SDM */
#define B32 (BRDCAST_MASK|BR_BITS32) /* {1to16} : broadcast 32b * 16 to zmm(512b) */
#define B64 (BRDCAST_MASK|BR_BITS64) /* {1to8} : broadcast 64b * 8 to zmm(512b) */
#define ER STATICRND_MASK /* ER(Embedded Rounding) == Static rounding mode */
#define SAE SAE_MASK /* SAE(Suppress All Exception) */

2
tables.h
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@ -62,7 +62,7 @@ extern const char * const nasm_insn_names[];
extern const char * const nasm_reg_names[];
/* regflags.c */
typedef uint64_t opflags_t;
typedef uint8_t decoflags_t;
typedef uint16_t decoflags_t;
extern const opflags_t nasm_reg_flags[];
/* regvals.c */
extern const int nasm_regvals[];