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tcg/riscv: Implement negsetcond_*

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Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-08-05 18:16:32 +00:00
parent fe06b89733
commit 41e4c0a9ad
2 changed files with 47 additions and 2 deletions
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45
tcg/riscv/tcg-target.c.inc
View file

@ -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:

4
tcg/riscv/tcg-target.h
View file

@ -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