[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH 08/28] tcg/ppc: Split out tcg_out_bswap32
From: |
Richard Henderson |
Subject: |
[PATCH 08/28] tcg/ppc: Split out tcg_out_bswap32 |
Date: |
Mon, 14 Jun 2021 01:37:40 -0700 |
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/ppc/tcg-target.c.inc | 28 ++++++++++++----------------
1 file changed, 12 insertions(+), 16 deletions(-)
diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc
index 64c24382a8..f0e42e4b88 100644
--- a/tcg/ppc/tcg-target.c.inc
+++ b/tcg/ppc/tcg-target.c.inc
@@ -798,6 +798,17 @@ static void tcg_out_bswap16(TCGContext *s, TCGReg dst,
TCGReg src)
tcg_out_mov(s, TCG_TYPE_REG, dst, tmp);
}
+static void tcg_out_bswap32(TCGContext *s, TCGReg dst, TCGReg src)
+{
+ TCGReg tmp = dst == src ? TCG_REG_R0 : dst;
+
+ /* Stolen from gcc's builtin_bswap32. src = abcd */
+ tcg_out_rlw(s, RLWINM, tmp, src, 8, 0, 31); /* tmp = bcda */
+ tcg_out_rlw(s, RLWIMI, tmp, src, 24, 0, 7); /* tmp = dcda */
+ tcg_out_rlw(s, RLWIMI, tmp, src, 24, 16, 23); /* tmp = dcba */
+ tcg_out_mov(s, TCG_TYPE_REG, dst, tmp);
+}
+
/* Emit a move into ret of arg, if it can be done in one insn. */
static bool tcg_out_movi_one(TCGContext *s, TCGReg ret, tcg_target_long arg)
{
@@ -2791,24 +2802,9 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
case INDEX_op_bswap16_i64:
tcg_out_bswap16(s, args[0], args[1]);
break;
-
case INDEX_op_bswap32_i32:
case INDEX_op_bswap32_i64:
- /* Stolen from gcc's builtin_bswap32 */
- a1 = args[1];
- a0 = args[0] == a1 ? TCG_REG_R0 : args[0];
-
- /* a1 = args[1] # abcd */
- /* a0 = rotate_left (a1, 8) # bcda */
- tcg_out_rlw(s, RLWINM, a0, a1, 8, 0, 31);
- /* a0 = (a0 & ~0xff000000) | ((a1 r<< 24) & 0xff000000) # dcda */
- tcg_out_rlw(s, RLWIMI, a0, a1, 24, 0, 7);
- /* a0 = (a0 & ~0x0000ff00) | ((a1 r<< 24) & 0x0000ff00) # dcba */
- tcg_out_rlw(s, RLWIMI, a0, a1, 24, 16, 23);
-
- if (a0 == TCG_REG_R0) {
- tcg_out_mov(s, TCG_TYPE_REG, args[0], a0);
- }
+ tcg_out_bswap32(s, args[0], args[1]);
break;
case INDEX_op_bswap64_i64:
--
2.25.1
[PATCH 02/28] tcg/i386: Support bswap flags, Richard Henderson, 2021/06/14
[PATCH 06/28] tcg/ppc: Split out tcg_out_sari{32,64}, Richard Henderson, 2021/06/14
[PATCH 08/28] tcg/ppc: Split out tcg_out_bswap32,
Richard Henderson <=
[PATCH 07/28] tcg/ppc: Split out tcg_out_bswap16, Richard Henderson, 2021/06/14
[PATCH 10/28] tcg/ppc: Support bswap flags, Richard Henderson, 2021/06/14
[PATCH 13/28] tcg/mips: Support bswap flags in tcg_out_bswap16, Richard Henderson, 2021/06/14
[PATCH 14/28] tcg/mips: Support bswap flags in tcg_out_bswap32, Richard Henderson, 2021/06/14