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[liftoff][arm] Implement Sign Extension

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This implements sign extension for the arm32 port of Liftoff.

Bug: v8:6600
Change-Id: Ib9fb56835b92fa96af013fd3504395d24a27e10e
Reviewed-on: https://chromium-review.googlesource.com/c/1348429
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57779}
This commit is contained in:
George Wort 2018-11-22 16:23:02 +00:00 committed by Commit Bot
parent 7aad32cda1
commit 82f9933129
1 changed files with 8 additions and 5 deletions
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13
src/wasm/baseline/arm/liftoff-assembler-arm.h
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@ -822,26 +822,29 @@ bool LiftoffAssembler::emit_type_conversion(WasmOpcode opcode,
}
void LiftoffAssembler::emit_i32_signextend_i8(Register dst, Register src) {
BAILOUT("emit_i32_signextend_i8");
sxtb(dst, src);
}
void LiftoffAssembler::emit_i32_signextend_i16(Register dst, Register src) {
BAILOUT("emit_i32_signextend_i16");
sxth(dst, src);
}
void LiftoffAssembler::emit_i64_signextend_i8(LiftoffRegister dst,
LiftoffRegister src) {
BAILOUT("emit_i64_signextend_i8");
emit_i32_signextend_i8(dst.low_gp(), src.low_gp());
mov(dst.high_gp(), Operand(dst.low_gp(), ASR, 31));
}
void LiftoffAssembler::emit_i64_signextend_i16(LiftoffRegister dst,
LiftoffRegister src) {
BAILOUT("emit_i64_signextend_i16");
emit_i32_signextend_i16(dst.low_gp(), src.low_gp());
mov(dst.high_gp(), Operand(dst.low_gp(), ASR, 31));
}
void LiftoffAssembler::emit_i64_signextend_i32(LiftoffRegister dst,
LiftoffRegister src) {
BAILOUT("emit_i64_signextend_i32");
TurboAssembler::Move(dst.low_gp(), src.low_gp());
mov(dst.high_gp(), Operand(src.low_gp(), ASR, 31));
}
void LiftoffAssembler::emit_jump(Label* label) { b(label); }