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[PATCH v4 04/27] tcg/s390x: Remove USE_LONG_BRANCHES
From: |
Richard Henderson |
Subject: |
[PATCH v4 04/27] tcg/s390x: Remove USE_LONG_BRANCHES |
Date: |
Thu, 8 Dec 2022 20:05:07 -0600 |
The size of a compiled TB is limited by the uint16_t used by
gen_insn_end_off[] -- there is no need for a 32-bit branch.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/s390x/tcg-target.c.inc | 9 ---------
1 file changed, 9 deletions(-)
diff --git a/tcg/s390x/tcg-target.c.inc b/tcg/s390x/tcg-target.c.inc
index 2cdd0d7a92..dea889ffa1 100644
--- a/tcg/s390x/tcg-target.c.inc
+++ b/tcg/s390x/tcg-target.c.inc
@@ -33,11 +33,6 @@
#include "../tcg-pool.c.inc"
#include "elf.h"
-/* ??? The translation blocks produced by TCG are generally small enough to
- be entirely reachable with a 16-bit displacement. Leaving the option for
- a 32-bit displacement here Just In Case. */
-#define USE_LONG_BRANCHES 0
-
#define TCG_CT_CONST_S16 0x100
#define TCG_CT_CONST_S32 0x200
#define TCG_CT_CONST_S33 0x400
@@ -1525,10 +1520,6 @@ static void tgen_branch(TCGContext *s, int cc, TCGLabel
*l)
{
if (l->has_value) {
tgen_gotoi(s, cc, l->u.value_ptr);
- } else if (USE_LONG_BRANCHES) {
- tcg_out16(s, RIL_BRCL | (cc << 4));
- tcg_out_reloc(s, s->code_ptr, R_390_PC32DBL, l, 2);
- s->code_ptr += 2;
} else {
tcg_out16(s, RI_BRC | (cc << 4));
tcg_out_reloc(s, s->code_ptr, R_390_PC16DBL, l, 2);
--
2.34.1
- [PATCH v4 00/27] tcg/s390x: misc patches, Richard Henderson, 2022/12/08
- [PATCH v4 04/27] tcg/s390x: Remove USE_LONG_BRANCHES,
Richard Henderson <=
- [PATCH v4 01/27] tcg/s390x: Use register pair allocation for div and mulu2, Richard Henderson, 2022/12/08
- [PATCH v4 03/27] tcg/s390x: Always set TCG_TARGET_HAS_direct_jump, Richard Henderson, 2022/12/08
- [PATCH v4 02/27] tcg/s390x: Remove TCG_REG_TB, Richard Henderson, 2022/12/08
- [PATCH v4 05/27] tcg/s390x: Check for long-displacement facility at startup, Richard Henderson, 2022/12/08
- [PATCH v4 06/27] tcg/s390x: Check for extended-immediate facility at startup, Richard Henderson, 2022/12/08
- [PATCH v4 08/27] tcg/s390x: Check for load-on-condition facility at startup, Richard Henderson, 2022/12/08