https://sourceware.org/bugzilla/show_bug.cgi?id=18974
Bug ID: 18974
Summary: GAS does not allow embedded rounding with memory
operand in V*SS/V*SD instructions
Product: binutils
Version: 2.26 (HEAD)
Status: NEW
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: maratek at gmail dot com
Target Milestone: ---
According to "Intel Architecture Instruction Set Extensions Programming
Reference" (319433-023, AUGUST 2015), the EVEX-encoded scalar arithmetic
instructions support embedded rounding, e.g.
VADDSS xmm1{k1}{z}, xmm2, xmm3/m32{er}
However, gas refuses to encode such instructions when both memory operand and
embedded rounding is specified. Repro:
.text
.intel_syntax noprefix
vaddsd xmm31{k7}, xmm30, xmm29, {rn-sae} # Compiles fine
vaddsd xmm31{k7}, xmm30, [rsi] # Compiles fine
vaddsd xmm31{k7}, xmm30, [rsi], {rn-sae} # Error: operand size mismatch for
`vaddsd'
I tried VADDSS/VADDSD/VSUBSS/VSUBSD/VMULSS/VMULSD, binutils 2.2.5 and the
upstream binutils from Git, they all exhibit this problem.
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