diff options
Diffstat (limited to 'src/fenv')
| -rw-r--r-- | src/fenv/i386/fenv.s | 67 | ||||
| -rw-r--r-- | src/fenv/x86_64/fenv.s | 3 |
2 files changed, 61 insertions, 9 deletions
diff --git a/src/fenv/i386/fenv.s b/src/fenv/i386/fenv.s index 471d2af8..9bba40a5 100644 --- a/src/fenv/i386/fenv.s +++ b/src/fenv/i386/fenv.s @@ -1,14 +1,26 @@ +.hidden __hwcap + .global feclearexcept .type feclearexcept,@function feclearexcept: mov 4(%esp),%ecx not %ecx - test $0x3f,%ecx + # consider sse fenv as well if the cpu has XMM capability + call 1f +1: addl $__hwcap-1b,(%esp) + pop %edx + testl $0x02000000,(%edx) + jz 1f + stmxcsr 4(%esp) + and %ecx,4(%esp) + ldmxcsr 4(%esp) +1: test $0x3f,%ecx jnz 2f 1: fnclex xor %eax,%eax ret 2: fnstsw %ax + # TODO: only load/store fenv if exceptions arent clear yet and %ecx,%eax jz 1b sub $32,%esp @@ -41,7 +53,18 @@ fesetround: andb $0xf3,1(%esp) or %ch,1(%esp) fldcw (%esp) - pop %ecx + # consider sse fenv as well if the cpu has XMM capability + call 1f +1: addl $__hwcap-1b,(%esp) + pop %edx + testl $0x02000000,(%edx) + jmp 1f + stmxcsr (%esp) + shl $3,%ch + andb $0x9f,1(%esp) + or %ch,1(%esp) + ldmxcsr (%esp) +1: pop %ecx ret .global fegetround @@ -59,7 +82,18 @@ fegetenv: mov 4(%esp),%ecx xor %eax,%eax fnstenv (%ecx) - ret + # consider sse fenv as well if the cpu has XMM capability + call 1f +1: addl $__hwcap-1b,(%esp) + pop %edx + testl $0x02000000,(%edx) + jz 1f + push %eax + stmxcsr (%esp) + pop %edx + and $0x3f,%edx + or %edx,4(%ecx) +1: ret .global fesetenv .type fesetenv,@function @@ -69,7 +103,8 @@ fesetenv: inc %ecx jz 1f fldenv -1(%ecx) - ret + movl -1(%ecx),%ecx + jmp 2f 1: push %eax push %eax push %eax @@ -79,12 +114,32 @@ fesetenv: pushl $0x37f fldenv (%esp) add $28,%esp - ret + # consider sse fenv as well if the cpu has XMM capability +2: call 1f +1: addl $__hwcap-1b,(%esp) + pop %edx + testl $0x02000000,(%edx) + jz 1f + # mxcsr := same rounding mode, cleared exceptions, default mask + and $0xc00,%ecx + shl $3,%ecx + or $0x1f80,%ecx + mov %ecx,4(%esp) + ldmxcsr 4(%esp) +1: ret .global fetestexcept .type fetestexcept,@function fetestexcept: mov 4(%esp),%ecx fnstsw %ax - and %ecx,%eax + # consider sse fenv as well if the cpu has XMM capability + call 1f +1: addl $__hwcap-1b,(%esp) + pop %edx + testl $0x02000000,(%edx) + jz 1f + stmxcsr 4(%esp) + or 4(%esp),%eax +1: and %ecx,%eax ret diff --git a/src/fenv/x86_64/fenv.s b/src/fenv/x86_64/fenv.s index 443e35a2..c48dade3 100644 --- a/src/fenv/x86_64/fenv.s +++ b/src/fenv/x86_64/fenv.s @@ -28,9 +28,6 @@ feraiseexcept: stmxcsr -8(%rsp) or %edi,-8(%rsp) ldmxcsr -8(%rsp) - fnstenv -32(%rsp) - or %edi,-28(%rsp) - fldenv -32(%rsp) xor %eax,%eax ret |