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[PATCH v2 23/30] tcg/i386: Introduce tcg_out_testi
From: |
Richard Henderson |
Subject: |
[PATCH v2 23/30] tcg/i386: Introduce tcg_out_testi |
Date: |
Wed, 15 Feb 2023 16:57:32 -1000 |
Split out a helper for choosing testb vs testl.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/i386/tcg-target.c.inc | 30 ++++++++++++++++++------------
1 file changed, 18 insertions(+), 12 deletions(-)
diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc
index 5547f47a26..a75fe91e86 100644
--- a/tcg/i386/tcg-target.c.inc
+++ b/tcg/i386/tcg-target.c.inc
@@ -1729,6 +1729,23 @@ static void tcg_out_nopn(TCGContext *s, int n)
tcg_out8(s, 0x90);
}
+/* Test register R vs immediate bits I, setting Z flag for EQ/NE. */
+static void __attribute__((unused))
+tcg_out_testi(TCGContext *s, TCGReg r, uint32_t i)
+{
+ /*
+ * This is used for testing alignment, so we can usually use testb.
+ * For i686, we have to use testl for %esi/%edi.
+ */
+ if (i <= 0xff && (TCG_TARGET_REG_BITS == 64 || r < 4)) {
+ tcg_out_modrm(s, OPC_GRP3_Eb | P_REXB_RM, EXT3_TESTi, r);
+ tcg_out8(s, i);
+ } else {
+ tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_TESTi, r);
+ tcg_out32(s, i);
+ }
+}
+
#if defined(CONFIG_SOFTMMU)
/*
* helper signature: helper_ld*_mmu(CPUState *env, target_ulong addr,
@@ -2056,18 +2073,7 @@ static void tcg_out_test_alignment(TCGContext *s, bool
is_ld, TCGReg addrlo,
unsigned a_mask = (1 << a_bits) - 1;
TCGLabelQemuLdst *label;
- /*
- * We are expecting a_bits to max out at 7, so we can usually use testb.
- * For i686, we have to use testl for %esi/%edi.
- */
- if (a_mask <= 0xff && (TCG_TARGET_REG_BITS == 64 || addrlo < 4)) {
- tcg_out_modrm(s, OPC_GRP3_Eb | P_REXB_RM, EXT3_TESTi, addrlo);
- tcg_out8(s, a_mask);
- } else {
- tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_TESTi, addrlo);
- tcg_out32(s, a_mask);
- }
-
+ tcg_out_testi(s, addrlo, a_mask);
/* jne slow_path */
tcg_out_opc(s, OPC_JCC_long + JCC_JNE, 0, 0, 0);
--
2.34.1
- [PATCH v2 12/30] tcg: Add 128-bit guest memory primitives, (continued)
- [PATCH v2 12/30] tcg: Add 128-bit guest memory primitives, Richard Henderson, 2023/02/15
- [PATCH v2 16/30] accel/tcg: Add aarch64 specific support in ldst_atomicity, Richard Henderson, 2023/02/15
- [PATCH v2 14/30] tcg/i386: Add have_atomic16, Richard Henderson, 2023/02/15
- [PATCH v2 15/30] accel/tcg: Use have_atomic16 in ldst_atomicity.c.inc, Richard Henderson, 2023/02/15
- [PATCH v2 17/30] tcg/aarch64: Detect have_lse, have_lse2 for linux, Richard Henderson, 2023/02/15
- [PATCH v2 19/30] accel/tcg: Add have_lse2 support in ldst_atomicity, Richard Henderson, 2023/02/15
- [PATCH v2 18/30] tcg/aarch64: Detect have_lse, have_lse2 for darwin, Richard Henderson, 2023/02/15
- [PATCH v2 20/30] tcg: Introduce TCG_OPF_TYPE_MASK, Richard Henderson, 2023/02/15
- [PATCH v2 22/30] tcg/i386: Introduce tcg_out_mov2, Richard Henderson, 2023/02/15
- [PATCH v2 21/30] tcg: Add INDEX_op_qemu_{ld,st}_i128, Richard Henderson, 2023/02/15
- [PATCH v2 23/30] tcg/i386: Introduce tcg_out_testi,
Richard Henderson <=
- [PATCH v2 24/30] tcg/i386: Use full load/store helpers in user-only mode, Richard Henderson, 2023/02/15
- [PATCH v2 25/30] tcg/i386: Replace is64 with type in qemu_ld/st routines, Richard Henderson, 2023/02/15
- [PATCH v2 26/30] tcg/i386: Mark Win64 call-saved vector regs as reserved, Richard Henderson, 2023/02/15
- [PATCH v2 27/30] tcg/i386: Examine MemOp for atomicity and alignment, Richard Henderson, 2023/02/15
- [PATCH v2 28/30] tcg/i386: Support 128-bit load/store with have_atomic16, Richard Henderson, 2023/02/15
- [PATCH v2 29/30] tcg/i386: Add vex_v argument to tcg_out_vex_modrm_pool, Richard Henderson, 2023/02/15
- [PATCH v2 30/30] tcg/i386: Honor 64-bit atomicity in 32-bit mode, Richard Henderson, 2023/02/15