From 927941059b95c3cc6264241115a23b1d14f1beb0 Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Fri, 23 Aug 2013 17:16:32 +0100 Subject: hw/scsi/lsi53c895a: Use sextract32 for sign-extension Use sextract32() for doing sign-extension rather than rolling our own implementation. Signed-off-by: Peter Maydell Signed-off-by: Paolo Bonzini --- hw/scsi/lsi53c895a.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) (limited to 'hw/scsi/lsi53c895a.c') diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c index 0c36842729..a26b20b19e 100644 --- a/hw/scsi/lsi53c895a.c +++ b/hw/scsi/lsi53c895a.c @@ -998,12 +998,6 @@ bad: s->msg_action = 0; } -/* Sign extend a 24-bit value. */ -static inline int32_t sxt24(int32_t n) -{ - return (n << 8) >> 8; -} - #define LSI_BUF_SIZE 4096 static void lsi_memcpy(LSIState *s, uint32_t dest, uint32_t src, int count) { @@ -1083,7 +1077,7 @@ again: /* Table indirect addressing. */ /* 32-bit Table indirect */ - offset = sxt24(addr); + offset = sextract32(addr, 0, 24); pci_dma_read(pci_dev, s->dsa + offset, buf, 8); /* byte count is stored in bits 0:23 only */ s->dbc = cpu_to_le32(buf[0]) & 0xffffff; @@ -1183,13 +1177,13 @@ again: uint32_t id; if (insn & (1 << 25)) { - id = read_dword(s, s->dsa + sxt24(insn)); + id = read_dword(s, s->dsa + sextract32(insn, 0, 24)); } else { id = insn; } id = (id >> 16) & 0xf; if (insn & (1 << 26)) { - addr = s->dsp + sxt24(addr); + addr = s->dsp + sextract32(addr, 0, 24); } s->dnad = addr; switch (opcode) { @@ -1385,7 +1379,7 @@ again: if (cond == jmp) { if (insn & (1 << 23)) { /* Relative address. */ - addr = s->dsp + sxt24(addr); + addr = s->dsp + sextract32(addr, 0, 24); } switch ((insn >> 27) & 7) { case 0: /* Jump */ @@ -1438,7 +1432,7 @@ again: int i; if (insn & (1 << 28)) { - addr = s->dsa + sxt24(addr); + addr = s->dsa + sextract32(addr, 0, 24); } n = (insn & 7); reg = (insn >> 16) & 0xff; -- cgit v1.2.3