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[PATCH 11/24] tcg/ppc: Use the Set Boolean Extension
From: |
Richard Henderson |
Subject: |
[PATCH 11/24] tcg/ppc: Use the Set Boolean Extension |
Date: |
Mon, 7 Aug 2023 20:11:30 -0700 |
The SETBC family of instructions requires exactly two insns for
all comparisions, saving 0-3 insns per (neg)setcond.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/ppc/tcg-target.c.inc | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/tcg/ppc/tcg-target.c.inc b/tcg/ppc/tcg-target.c.inc
index 10448aa0e6..090f11e71c 100644
--- a/tcg/ppc/tcg-target.c.inc
+++ b/tcg/ppc/tcg-target.c.inc
@@ -447,6 +447,11 @@ static bool tcg_target_const_match(int64_t val, TCGType
type, int ct)
#define TW XO31( 4)
#define TRAP (TW | TO(31))
+#define SETBC XO31(384) /* v3.10 */
+#define SETBCR XO31(416) /* v3.10 */
+#define SETNBC XO31(448) /* v3.10 */
+#define SETNBCR XO31(480) /* v3.10 */
+
#define NOP ORI /* ori 0,0,0 */
#define LVX XO31(103)
@@ -1624,6 +1629,23 @@ static void tcg_out_setcond(TCGContext *s, TCGType type,
TCGCond cond,
arg2 = (uint32_t)arg2;
}
+ /* With SETBC/SETBCR, we can always implement with 2 insns. */
+ if (have_isa_3_10) {
+ tcg_insn_unit bi, opc;
+
+ tcg_out_cmp(s, cond, arg1, arg2, const_arg2, 7, type);
+
+ /* Re-use tcg_to_bc for BI and BO_COND_{TRUE,FALSE}. */
+ bi = tcg_to_bc[cond] & (0x1f << 16);
+ if (tcg_to_bc[cond] & BO(8)) {
+ opc = neg ? SETNBC : SETBC;
+ } else {
+ opc = neg ? SETNBCR : SETBCR;
+ }
+ tcg_out32(s, opc | RT(arg0) | bi);
+ return;
+ }
+
/* Handle common and trivial cases before handling anything else. */
if (arg2 == 0) {
switch (cond) {
--
2.34.1
- Re: [PATCH 06/24] target/openrisc: Use tcg_gen_negsetcond_*, (continued)
- [PATCH 07/24] target/ppc: Use tcg_gen_negsetcond_*, Richard Henderson, 2023/08/07
- [PATCH 08/24] target/sparc: Use tcg_gen_movcond_i64 in gen_edge, Richard Henderson, 2023/08/07
- [PATCH 09/24] target/tricore: Replace gen_cond_w with tcg_gen_negsetcond_tl, Richard Henderson, 2023/08/07
- [PATCH 10/24] tcg/ppc: Implement negsetcond_*, Richard Henderson, 2023/08/07
- [PATCH 11/24] tcg/ppc: Use the Set Boolean Extension,
Richard Henderson <=
- [PATCH 12/24] tcg/aarch64: Implement negsetcond_*, Richard Henderson, 2023/08/07
[PATCH 13/24] tcg/arm: Implement negsetcond_i32, Richard Henderson, 2023/08/07
[PATCH 15/24] tcg/s390x: Implement negsetcond_*, Richard Henderson, 2023/08/07