aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorRichard Henderson <rth@twiddle.net>2013-09-09 21:07:09 -0700
committerRichard Henderson <rth@twiddle.net>2014-03-17 11:13:26 -0700
commita9c7d27bd189c8df698fac1369f718e7fa30d9d9 (patch)
tree0ff3f90508d0a6d49962e3dcff7bfd12d91da1e6
parent1d0a60681a287e5697fa5b537dabb77f9c9c7f04 (diff)
tcg-sparc: Improve tcg_out_movi
If bits 31:13 are zero, reduce the insn count by one. Signed-off-by: Richard Henderson <rth@twiddle.net>
-rw-r--r--tcg/sparc/tcg-target.c52
1 files changed, 31 insertions, 21 deletions
diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
index 3ae014dc03..e5a5e02f6d 100644
--- a/tcg/sparc/tcg-target.c
+++ b/tcg/sparc/tcg-target.c
@@ -384,37 +384,47 @@ static inline void tcg_out_movi_imm13(TCGContext *s, int ret, uint32_t arg)
tcg_out_arithi(s, ret, TCG_REG_G0, arg, ARITH_OR);
}
-static inline void tcg_out_movi_imm32(TCGContext *s, int ret, uint32_t arg)
+static void tcg_out_movi(TCGContext *s, TCGType type,
+ TCGReg ret, tcg_target_long arg)
{
- if (check_fit_tl(arg, 13))
+ tcg_target_long hi, lo;
+
+ /* A 13-bit constant sign-extended to 64-bits. */
+ if (check_fit_tl(arg, 13)) {
tcg_out_movi_imm13(s, ret, arg);
- else {
- tcg_out_sethi(s, ret, arg);
- if (arg & 0x3ff)
- tcg_out_arithi(s, ret, ret, arg & 0x3ff, ARITH_OR);
+ return;
}
-}
-static inline void tcg_out_movi(TCGContext *s, TCGType type,
- TCGReg ret, tcg_target_long arg)
-{
- /* All 32-bit constants, as well as 64-bit constants with
- no high bits set go through movi_imm32. */
+ /* A 32-bit constant, or 32-bit zero-extended to 64-bits. */
if (TCG_TARGET_REG_BITS == 32
|| type == TCG_TYPE_I32
- || (arg & ~(tcg_target_long)0xffffffff) == 0) {
- tcg_out_movi_imm32(s, ret, arg);
- } else if (check_fit_tl(arg, 13)) {
- /* A 13-bit constant sign-extended to 64-bits. */
- tcg_out_movi_imm13(s, ret, arg);
- } else if (check_fit_tl(arg, 32)) {
- /* A 32-bit constant sign-extended to 64-bits. */
+ || (arg & ~0xffffffffu) == 0) {
+ tcg_out_sethi(s, ret, arg);
+ if (arg & 0x3ff) {
+ tcg_out_arithi(s, ret, ret, arg & 0x3ff, ARITH_OR);
+ }
+ return;
+ }
+
+ /* A 32-bit constant sign-extended to 64-bits. */
+ if (check_fit_tl(arg, 32)) {
tcg_out_sethi(s, ret, ~arg);
tcg_out_arithi(s, ret, ret, (arg & 0x3ff) | -0x400, ARITH_XOR);
+ return;
+ }
+
+ /* A 64-bit constant decomposed into 2 32-bit pieces. */
+ lo = (int32_t)arg;
+ if (check_fit_tl(lo, 13)) {
+ hi = (arg - lo) >> 31 >> 1;
+ tcg_out_movi(s, TCG_TYPE_I32, ret, hi);
+ tcg_out_arithi(s, ret, ret, 32, SHIFT_SLLX);
+ tcg_out_arithi(s, ret, ret, lo, ARITH_ADD);
} else {
- tcg_out_movi_imm32(s, ret, arg >> (TCG_TARGET_REG_BITS / 2));
+ hi = arg >> 31 >> 1;
+ tcg_out_movi(s, TCG_TYPE_I32, ret, hi);
+ tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_T2, lo);
tcg_out_arithi(s, ret, ret, 32, SHIFT_SLLX);
- tcg_out_movi_imm32(s, TCG_REG_T2, arg);
tcg_out_arith(s, ret, ret, TCG_REG_T2, ARITH_OR);
}
}