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tcg/ppc: Support bswap flags

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For INDEX_op_bswap32_i32, pass 0 for flags: input not zero-extended,
output does not need extension within the host 64-bit register.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-06-13 16:48:02 +00:00
parent 674ba58803
commit 26ce70051b
1 changed files with 16 additions and 6 deletions
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22
tcg/ppc/tcg-target.c.inc
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@ -789,7 +789,7 @@ static inline void tcg_out_sari64(TCGContext *s, TCGReg dst, TCGReg src, int c)
tcg_out32(s, SRADI | RA(dst) | RS(src) | SH(c & 0x1f) | ((c >> 4) & 2));
}
static void tcg_out_bswap16(TCGContext *s, TCGReg dst, TCGReg src)
static void tcg_out_bswap16(TCGContext *s, TCGReg dst, TCGReg src, int flags)
{
TCGReg tmp = dst == src ? TCG_REG_R0 : dst;
@ -804,10 +804,14 @@ static void tcg_out_bswap16(TCGContext *s, TCGReg dst, TCGReg src)
/* tmp = dep(tmp, rol32(src, 8), 0x0000ff00) = 000000dc */
tcg_out_rlw(s, RLWIMI, tmp, src, 8, 16, 23);
tcg_out_mov(s, TCG_TYPE_REG, dst, tmp);
if (flags & TCG_BSWAP_OS) {
tcg_out_ext16s(s, dst, tmp);
} else {
tcg_out_mov(s, TCG_TYPE_REG, dst, tmp);
}
}
static void tcg_out_bswap32(TCGContext *s, TCGReg dst, TCGReg src)
static void tcg_out_bswap32(TCGContext *s, TCGReg dst, TCGReg src, int flags)
{
TCGReg tmp = dst == src ? TCG_REG_R0 : dst;
@ -825,7 +829,11 @@ static void tcg_out_bswap32(TCGContext *s, TCGReg dst, TCGReg src)
/* tmp = dep(tmp, rol32(src, 24), 0x0000ff00) = 0000dcba */
tcg_out_rlw(s, RLWIMI, tmp, src, 24, 16, 23);
tcg_out_mov(s, TCG_TYPE_REG, dst, tmp);
if (flags & TCG_BSWAP_OS) {
tcg_out_ext32s(s, dst, tmp);
} else {
tcg_out_mov(s, TCG_TYPE_REG, dst, tmp);
}
}
static void tcg_out_bswap64(TCGContext *s, TCGReg dst, TCGReg src)
@ -2851,11 +2859,13 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
case INDEX_op_bswap16_i32:
case INDEX_op_bswap16_i64:
tcg_out_bswap16(s, args[0], args[1]);
tcg_out_bswap16(s, args[0], args[1], args[2]);
break;
case INDEX_op_bswap32_i32:
tcg_out_bswap32(s, args[0], args[1], 0);
break;
case INDEX_op_bswap32_i64:
tcg_out_bswap32(s, args[0], args[1]);
tcg_out_bswap32(s, args[0], args[1], args[2]);
break;
case INDEX_op_bswap64_i64:
tcg_out_bswap64(s, args[0], args[1]);