diff options
| -rw-r--r-- | tcg/aarch64/tcg-target.inc.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/tcg/aarch64/tcg-target.inc.c b/tcg/aarch64/tcg-target.inc.c index 0b8b733805..52c18074ae 100644 --- a/tcg/aarch64/tcg-target.inc.c +++ b/tcg/aarch64/tcg-target.inc.c @@ -273,6 +273,26 @@ static bool is_fimm64(uint64_t v64, int *cmode, int *imm8) return false; } +/* + * Return non-zero if v32 can be formed by MOVI+ORR. + * Place the parameters for MOVI in (cmode, imm8). + * Return the cmode for ORR; the imm8 can be had via extraction from v32. + */ +static int is_shimm32_pair(uint32_t v32, int *cmode, int *imm8) +{ + int i; + + for (i = 6; i > 0; i -= 2) { + /* Mask out one byte we can add with ORR. */ + uint32_t tmp = v32 & ~(0xffu << (i * 4)); + if (is_shimm32(tmp, cmode, imm8) || + is_soimm32(tmp, cmode, imm8)) { + break; + } + } + return i; +} + static int tcg_target_const_match(tcg_target_long val, TCGType type, const TCGArgConstraint *arg_ct) { @@ -495,6 +515,8 @@ typedef enum { /* AdvSIMD modified immediate */ I3606_MOVI = 0x0f000400, I3606_MVNI = 0x2f000400, + I3606_BIC = 0x2f001400, + I3606_ORR = 0x0f001400, /* AdvSIMD shift by immediate */ I3614_SSHR = 0x0f000400, @@ -843,6 +865,14 @@ static void tcg_out_dupi_vec(TCGContext *s, TCGType type, tcg_out_insn(s, 3606, MVNI, q, rd, 0, cmode, imm8); return; } + + /* + * Otherwise, all remaining constants can be loaded in two insns: + * rd = v16 & 0xff, rd |= v16 & 0xff00. + */ + tcg_out_insn(s, 3606, MOVI, q, rd, 0, 0x8, v16 & 0xff); + tcg_out_insn(s, 3606, ORR, q, rd, 0, 0xa, v16 >> 8); + return; } else if (v64 == dup_const(MO_32, v64)) { uint32_t v32 = v64; uint32_t n32 = ~v32; @@ -858,6 +888,23 @@ static void tcg_out_dupi_vec(TCGContext *s, TCGType type, tcg_out_insn(s, 3606, MVNI, q, rd, 0, cmode, imm8); return; } + + /* + * Restrict the set of constants to those we can load with + * two instructions. Others we load from the pool. + */ + i = is_shimm32_pair(v32, &cmode, &imm8); + if (i) { + tcg_out_insn(s, 3606, MOVI, q, rd, 0, cmode, imm8); + tcg_out_insn(s, 3606, ORR, q, rd, 0, i, extract32(v32, i * 4, 8)); + return; + } + i = is_shimm32_pair(n32, &cmode, &imm8); + if (i) { + tcg_out_insn(s, 3606, MVNI, q, rd, 0, cmode, imm8); + tcg_out_insn(s, 3606, BIC, q, rd, 0, i, extract32(n32, i * 4, 8)); + return; + } } else if (is_fimm64(v64, &cmode, &imm8)) { tcg_out_insn(s, 3606, MOVI, q, rd, 1, cmode, imm8); return; |