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tcg/tci: Reserve r13 for a temporary

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We're about to adjust the offset range on host memory ops,
and the format of branches.  Both will require a temporary.

Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-01-31 23:26:14 -10:00
parent 7b7d8b2d9a
commit baa94c0d33
2 changed files with 2 additions and 0 deletions
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1
tcg/tci/tcg-target.c.inc
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@ -820,6 +820,7 @@ static void tcg_target_init(TCGContext *s)
MAKE_64BIT_MASK(TCG_REG_R0, 64 / TCG_TARGET_REG_BITS); MAKE_64BIT_MASK(TCG_REG_R0, 64 / TCG_TARGET_REG_BITS);
s->reserved_regs = 0; s->reserved_regs = 0;
tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP);
tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK); tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK);
/* The call arguments come first, followed by the temp storage. */ /* The call arguments come first, followed by the temp storage. */

1
tcg/tci/tcg-target.h
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@ -156,6 +156,7 @@ typedef enum {
TCG_REG_R14, TCG_REG_R14,
TCG_REG_R15, TCG_REG_R15,
TCG_REG_TMP = TCG_REG_R13,
TCG_AREG0 = TCG_REG_R14, TCG_AREG0 = TCG_REG_R14,
TCG_REG_CALL_STACK = TCG_REG_R15, TCG_REG_CALL_STACK = TCG_REG_R15,
} TCGReg; } TCGReg;