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tcg/arm: Split out tcg_out_ldstm

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Expand these hard-coded instructions symbolically.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-08-08 08:29:18 -10:00
parent b87c1add03
commit 31d160adc9
1 changed files with 17 additions and 2 deletions
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19
tcg/arm/tcg-target.c.inc
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@ -141,6 +141,9 @@ typedef enum {
INSN_CLZ = 0x016f0f10,
INSN_RBIT = 0x06ff0f30,
INSN_LDMIA = 0x08b00000,
INSN_STMDB = 0x09200000,
INSN_LDR_IMM = 0x04100000,
INSN_LDR_REG = 0x06100000,
INSN_STR_IMM = 0x04000000,
@ -593,6 +596,12 @@ static inline void tcg_out_dat_imm(TCGContext *s,
(rn << 16) | (rd << 12) | im);
}
static void tcg_out_ldstm(TCGContext *s, int cond, int opc,
TCGReg rn, uint16_t mask)
{
tcg_out32(s, (cond << 28) | opc | (rn << 16) | mask);
}
/* Note that this routine is used for both LDR and LDRH formats, so we do
not wish to include an immediate shift at this point. */
static void tcg_out_memop_r(TCGContext *s, int cond, ARMInsn opc, TCGReg rt,
@ -3081,7 +3090,10 @@ static void tcg_target_qemu_prologue(TCGContext *s)
{
/* Calling convention requires us to save r4-r11 and lr. */
/* stmdb sp!, { r4 - r11, lr } */
tcg_out32(s, (COND_AL << 28) | 0x092d4ff0);
tcg_out_ldstm(s, COND_AL, INSN_STMDB, TCG_REG_CALL_STACK,
(1 << TCG_REG_R4) | (1 << TCG_REG_R5) | (1 << TCG_REG_R6) |
(1 << TCG_REG_R7) | (1 << TCG_REG_R8) | (1 << TCG_REG_R9) |
(1 << TCG_REG_R10) | (1 << TCG_REG_R11) | (1 << TCG_REG_R14));
/* Reserve callee argument and tcg temp space. */
tcg_out_dat_rI(s, COND_AL, ARITH_SUB, TCG_REG_CALL_STACK,
@ -3109,7 +3121,10 @@ static void tcg_out_epilogue(TCGContext *s)
TCG_REG_CALL_STACK, STACK_ADDEND, 1);
/* ldmia sp!, { r4 - r11, pc } */
tcg_out32(s, (COND_AL << 28) | 0x08bd8ff0);
tcg_out_ldstm(s, COND_AL, INSN_LDMIA, TCG_REG_CALL_STACK,
(1 << TCG_REG_R4) | (1 << TCG_REG_R5) | (1 << TCG_REG_R6) |
(1 << TCG_REG_R7) | (1 << TCG_REG_R8) | (1 << TCG_REG_R9) |
(1 << TCG_REG_R10) | (1 << TCG_REG_R11) | (1 << TCG_REG_PC));
}
typedef struct {