From: Jozef Lawrynowicz <jozef.l@mittosystems.com>
Date: Tue, 21 Jul 2020 16:24:03 +0000 (+0100)
Subject: MSP430: Define extendqipsi2
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=aa360dd1c882b943066ba088861c0bfac9df930d;p=gcc.git

MSP430: Define extendqipsi2

The SXT instruction extends the sign of the low byte of the operand
through the entire PSImode register.
SXTX.A can be used to sign extend the low byte of a memory operand
through to the 19th bit. Bits 31:20 are cleared.

gcc/ChangeLog:

	* config/msp430/msp430.md: New "extendqipsi2" define_insn.
---

diff --git a/gcc/config/msp430/msp430.md b/gcc/config/msp430/msp430.md
index b6602fbca66..99299bd70ef 100644
--- a/gcc/config/msp430/msp430.md
+++ b/gcc/config/msp430/msp430.md
@@ -553,6 +553,15 @@
    SXT%X0\t%0"
 )
 
+(define_insn "extendqipsi2"
+  [(set (match_operand:PSI		   0 "msp430_general_dst_operand" "=r,m")
+	(sign_extend:PSI (match_operand:QI 1 "msp430_general_operand" "0,0")))]
+  ""
+  "@
+  SXT\t%0
+  SXTX.A\t%0"
+)
+
 ;; ------------------------
 ;; ZERO EXTEND INSTRUCTIONS
 ;; Byte-writes to registers clear bits 19:8