diff options
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/aarch64/tcg-target.inc.c | 203 |
1 files changed, 119 insertions, 84 deletions
diff --git a/tcg/aarch64/tcg-target.inc.c b/tcg/aarch64/tcg-target.inc.c index e99149cda7..1422dfebe2 100644 --- a/tcg/aarch64/tcg-target.inc.c +++ b/tcg/aarch64/tcg-target.inc.c @@ -190,103 +190,86 @@ static inline bool is_limm(uint64_t val) return (val & (val - 1)) == 0; } -/* Match a constant that is valid for vectors. */ -static bool is_fimm(uint64_t v64, int *op, int *cmode, int *imm8) +/* Return true if v16 is a valid 16-bit shifted immediate. */ +static bool is_shimm16(uint16_t v16, int *cmode, int *imm8) { - int i; + if (v16 == (v16 & 0xff)) { + *cmode = 0x8; + *imm8 = v16 & 0xff; + return true; + } else if (v16 == (v16 & 0xff00)) { + *cmode = 0xa; + *imm8 = v16 >> 8; + return true; + } + return false; +} - *op = 0; - /* Match replication across 8 bits. */ - if (v64 == dup_const(MO_8, v64)) { - *cmode = 0xe; - *imm8 = v64 & 0xff; +/* Return true if v32 is a valid 32-bit shifted immediate. */ +static bool is_shimm32(uint32_t v32, int *cmode, int *imm8) +{ + if (v32 == (v32 & 0xff)) { + *cmode = 0x0; + *imm8 = v32 & 0xff; + return true; + } else if (v32 == (v32 & 0xff00)) { + *cmode = 0x2; + *imm8 = (v32 >> 8) & 0xff; + return true; + } else if (v32 == (v32 & 0xff0000)) { + *cmode = 0x4; + *imm8 = (v32 >> 16) & 0xff; + return true; + } else if (v32 == (v32 & 0xff000000)) { + *cmode = 0x6; + *imm8 = v32 >> 24; return true; } - /* Match replication across 16 bits. */ - if (v64 == dup_const(MO_16, v64)) { - uint16_t v16 = v64; + return false; +} - if (v16 == (v16 & 0xff)) { - *cmode = 0x8; - *imm8 = v16 & 0xff; - return true; - } else if (v16 == (v16 & 0xff00)) { - *cmode = 0xa; - *imm8 = v16 >> 8; - return true; - } +/* Return true if v32 is a valid 32-bit shifting ones immediate. */ +static bool is_soimm32(uint32_t v32, int *cmode, int *imm8) +{ + if ((v32 & 0xffff00ff) == 0xff) { + *cmode = 0xc; + *imm8 = (v32 >> 8) & 0xff; + return true; + } else if ((v32 & 0xff00ffff) == 0xffff) { + *cmode = 0xd; + *imm8 = (v32 >> 16) & 0xff; + return true; } - /* Match replication across 32 bits. */ - if (v64 == dup_const(MO_32, v64)) { - uint32_t v32 = v64; + return false; +} - if (v32 == (v32 & 0xff)) { - *cmode = 0x0; - *imm8 = v32 & 0xff; - return true; - } else if (v32 == (v32 & 0xff00)) { - *cmode = 0x2; - *imm8 = (v32 >> 8) & 0xff; - return true; - } else if (v32 == (v32 & 0xff0000)) { - *cmode = 0x4; - *imm8 = (v32 >> 16) & 0xff; - return true; - } else if (v32 == (v32 & 0xff000000)) { - *cmode = 0x6; - *imm8 = v32 >> 24; - return true; - } else if ((v32 & 0xffff00ff) == 0xff) { - *cmode = 0xc; - *imm8 = (v32 >> 8) & 0xff; - return true; - } else if ((v32 & 0xff00ffff) == 0xffff) { - *cmode = 0xd; - *imm8 = (v32 >> 16) & 0xff; - return true; - } - /* Match forms of a float32. */ - if (extract32(v32, 0, 19) == 0 - && (extract32(v32, 25, 6) == 0x20 - || extract32(v32, 25, 6) == 0x1f)) { - *cmode = 0xf; - *imm8 = (extract32(v32, 31, 1) << 7) - | (extract32(v32, 25, 1) << 6) - | extract32(v32, 19, 6); - return true; - } +/* Return true if v32 is a valid float32 immediate. */ +static bool is_fimm32(uint32_t v32, int *cmode, int *imm8) +{ + if (extract32(v32, 0, 19) == 0 + && (extract32(v32, 25, 6) == 0x20 + || extract32(v32, 25, 6) == 0x1f)) { + *cmode = 0xf; + *imm8 = (extract32(v32, 31, 1) << 7) + | (extract32(v32, 25, 1) << 6) + | extract32(v32, 19, 6); + return true; } - /* Match forms of a float64. */ + return false; +} + +/* Return true if v64 is a valid float64 immediate. */ +static bool is_fimm64(uint64_t v64, int *cmode, int *imm8) +{ if (extract64(v64, 0, 48) == 0 && (extract64(v64, 54, 9) == 0x100 || extract64(v64, 54, 9) == 0x0ff)) { *cmode = 0xf; - *op = 1; *imm8 = (extract64(v64, 63, 1) << 7) | (extract64(v64, 54, 1) << 6) | extract64(v64, 48, 6); return true; } - /* Match bytes of 0x00 and 0xff. */ - for (i = 0; i < 64; i += 8) { - uint64_t byte = extract64(v64, i, 8); - if (byte != 0 && byte != 0xff) { - break; - } - } - if (i == 64) { - *cmode = 0xe; - *op = 1; - *imm8 = (extract64(v64, 0, 1) << 0) - | (extract64(v64, 8, 1) << 1) - | (extract64(v64, 16, 1) << 2) - | (extract64(v64, 24, 1) << 3) - | (extract64(v64, 32, 1) << 4) - | (extract64(v64, 40, 1) << 5) - | (extract64(v64, 48, 1) << 6) - | (extract64(v64, 56, 1) << 7); - return true; - } return false; } @@ -817,11 +800,63 @@ static void tcg_out_logicali(TCGContext *s, AArch64Insn insn, TCGType ext, static void tcg_out_dupi_vec(TCGContext *s, TCGType type, TCGReg rd, tcg_target_long v64) { - int op, cmode, imm8; + bool q = type == TCG_TYPE_V128; + int cmode, imm8, i; + + /* Test all bytes equal first. */ + if (v64 == dup_const(MO_8, v64)) { + imm8 = (uint8_t)v64; + tcg_out_insn(s, 3606, MOVI, q, rd, 0, 0xe, imm8); + return; + } + + /* + * Test all bytes 0x00 or 0xff second. This can match cases that + * might otherwise take 2 or 3 insns for MO_16 or MO_32 below. + */ + for (i = imm8 = 0; i < 8; i++) { + uint8_t byte = v64 >> (i * 8); + if (byte == 0xff) { + imm8 |= 1 << i; + } else if (byte != 0) { + goto fail_bytes; + } + } + tcg_out_insn(s, 3606, MOVI, q, rd, 1, 0xe, imm8); + return; + fail_bytes: + + /* + * Tests for various replications. For each element width, if we + * cannot find an expansion there's no point checking a larger + * width because we already know by replication it cannot match. + */ + if (v64 == dup_const(MO_16, v64)) { + uint16_t v16 = v64; + + if (is_shimm16(v16, &cmode, &imm8)) { + tcg_out_insn(s, 3606, MOVI, q, rd, 0, cmode, imm8); + return; + } + } else if (v64 == dup_const(MO_32, v64)) { + uint32_t v32 = v64; - if (is_fimm(v64, &op, &cmode, &imm8)) { - tcg_out_insn(s, 3606, MOVI, type == TCG_TYPE_V128, rd, op, cmode, imm8); - } else if (type == TCG_TYPE_V128) { + if (is_shimm32(v32, &cmode, &imm8) || + is_soimm32(v32, &cmode, &imm8) || + is_fimm32(v32, &cmode, &imm8)) { + tcg_out_insn(s, 3606, MOVI, q, rd, 0, cmode, imm8); + return; + } + } else if (is_fimm64(v64, &cmode, &imm8)) { + tcg_out_insn(s, 3606, MOVI, q, rd, 1, cmode, imm8); + return; + } + + /* + * As a last resort, load from the constant pool. Sadly there + * is no LD1R (literal), so store the full 16-byte vector. + */ + if (type == TCG_TYPE_V128) { new_pool_l2(s, R_AARCH64_CONDBR19, s->code_ptr, 0, v64, v64); tcg_out_insn(s, 3305, LDR_v128, 0, rd); } else { |