diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2023-08-05 18:16:32 +0000 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-08-24 11:22:42 -0700 |
| commit | 41e4c0a9ad2b10fc14896447361225b410eb112e (patch) | |
| tree | 081dd67cd0a9ba5671622d2dde7144386b71e60a /tcg/riscv | |
| parent | fe06b8973385c9421b2988239cadb9d091cdc628 (diff) | |
| download | qemu-41e4c0a9ad2b10fc14896447361225b410eb112e.zip qemu-41e4c0a9ad2b10fc14896447361225b410eb112e.tar.gz qemu-41e4c0a9ad2b10fc14896447361225b410eb112e.tar.bz2 | |
tcg/riscv: Implement negsetcond_*
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'tcg/riscv')
| -rw-r--r-- | tcg/riscv/tcg-target.c.inc | 45 | ||||
| -rw-r--r-- | tcg/riscv/tcg-target.h | 4 |
2 files changed, 47 insertions, 2 deletions
diff --git a/tcg/riscv/tcg-target.c.inc b/tcg/riscv/tcg-target.c.inc index eeaeb6b..232b616 100644 --- a/tcg/riscv/tcg-target.c.inc +++ b/tcg/riscv/tcg-target.c.inc @@ -936,6 +936,44 @@ static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret, } } +static void tcg_out_negsetcond(TCGContext *s, TCGCond cond, TCGReg ret, + TCGReg arg1, tcg_target_long arg2, bool c2) +{ + int tmpflags; + TCGReg tmp; + + /* For LT/GE comparison against 0, replicate the sign bit. */ + if (c2 && arg2 == 0) { + switch (cond) { + case TCG_COND_GE: + tcg_out_opc_imm(s, OPC_XORI, ret, arg1, -1); + arg1 = ret; + /* fall through */ + case TCG_COND_LT: + tcg_out_opc_imm(s, OPC_SRAI, ret, arg1, TCG_TARGET_REG_BITS - 1); + return; + default: + break; + } + } + + tmpflags = tcg_out_setcond_int(s, cond, ret, arg1, arg2, c2); + tmp = tmpflags & ~SETCOND_FLAGS; + + /* If intermediate result is zero/non-zero: test != 0. */ + if (tmpflags & SETCOND_NEZ) { + tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, tmp); + tmp = ret; + } + + /* Produce the 0/-1 result. */ + if (tmpflags & SETCOND_INV) { + tcg_out_opc_imm(s, OPC_ADDI, ret, tmp, -1); + } else { + tcg_out_opc_reg(s, OPC_SUB, ret, TCG_REG_ZERO, tmp); + } +} + static void tcg_out_movcond_zicond(TCGContext *s, TCGReg ret, TCGReg test_ne, int val1, bool c_val1, int val2, bool c_val2) @@ -1782,6 +1820,11 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc, tcg_out_setcond(s, args[3], a0, a1, a2, c2); break; + case INDEX_op_negsetcond_i32: + case INDEX_op_negsetcond_i64: + tcg_out_negsetcond(s, args[3], a0, a1, a2, c2); + break; + case INDEX_op_movcond_i32: case INDEX_op_movcond_i64: tcg_out_movcond(s, args[5], a0, a1, a2, c2, @@ -1910,6 +1953,8 @@ static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op) case INDEX_op_xor_i64: case INDEX_op_setcond_i32: case INDEX_op_setcond_i64: + case INDEX_op_negsetcond_i32: + case INDEX_op_negsetcond_i64: return C_O1_I2(r, r, rI); case INDEX_op_andc_i32: diff --git a/tcg/riscv/tcg-target.h b/tcg/riscv/tcg-target.h index 0efb3fc..c1132d1 100644 --- a/tcg/riscv/tcg-target.h +++ b/tcg/riscv/tcg-target.h @@ -88,7 +88,7 @@ extern bool have_zbb; /* optional instructions */ #define TCG_TARGET_HAS_movcond_i32 1 -#define TCG_TARGET_HAS_negsetcond_i32 0 +#define TCG_TARGET_HAS_negsetcond_i32 1 #define TCG_TARGET_HAS_div_i32 1 #define TCG_TARGET_HAS_rem_i32 1 #define TCG_TARGET_HAS_div2_i32 0 @@ -124,7 +124,7 @@ extern bool have_zbb; #define TCG_TARGET_HAS_qemu_st8_i32 0 #define TCG_TARGET_HAS_movcond_i64 1 -#define TCG_TARGET_HAS_negsetcond_i64 0 +#define TCG_TARGET_HAS_negsetcond_i64 1 #define TCG_TARGET_HAS_div_i64 1 #define TCG_TARGET_HAS_rem_i64 1 #define TCG_TARGET_HAS_div2_i64 0 |